HomeMy WebLinkAboutGrant Lake Hydro Project 2019
FERC/FEIS–0283F
FINAL ENVIRONMENTAL IMPACT STATEMENT
FOR HYDROPOWER LICENSES
Grant Lake Hydroelectric Project—FERC Project No. 13212-005
Alaska
Federal Energy Regulatory Commission
Office of Energy Projects
Division of Hydropower Licensing
888 First Street, NE, Washington, DC 20426
Office of
Energy
Projects
May 2019
FERC/FEIS–0283F
FINAL ENVIRONMENTAL IMPACT STATEMENT
FOR HYDROPOWER LICENSE
Grant Lake Hydroelectric Project—FERC Project No. 13212-005
Alaska
Federal Energy Regulatory Commission
Office of Energy Projects
Division of Hydropower Licensing
888 First Street, NE
Washington, D.C. 20426
May 2019
FEDERAL ENERGY REGULATORY COMMISSION
WASHINGTON, D.C. 20426
OFFICE OF ENERGY PROJECTS
To the Agency or Individual Addressed:
Reference: Final Environmental Impact Statement
Attached is the final environmental impact statement (final EIS) for the Grant
Lake Hydroelectric Project (FERC Project No. 13212), which would be located on Grant
Creek near the community of Moose Pass within the Kenai Peninsula Borough of Alaska.
This final EIS documents the view of governmental agencies, non-governmental
organizations, affected Indian tribes, the public, the license applicant, and Federal Energy
Regulatory Commission (Commission) staff. It contains staff evaluations of the
applicant’s proposal and alternatives for licensing the Grant Lake Hydroelectric Project.
Before the Commission makes a licensing decision, it will take into account all
concerns relevant to the public interest. The final EIS will be part of the record from
which the Commission will make its decision. The final EIS was sent to the U.S.
Environmental Protection Agency and made available to the public on or about May 1,
2019.
Copies of the final EIS are available for review in the Commission’s Public
Reference Branch, Room 2A, located at 888 First Street, N.E., Washington D.C. 20426.
The draft EIS also may be viewed on the Internet at www.ferc.gov/docs-
filing/elibrary.asp. Please call (202) 502-8222 for assistance.
Attachment: Final EIS
iii
COVER SHEET
a. Title:
Environmental Impact Statement for Hydropower License, Grant
Lake Hydroelectric Project—FERC Project No. 13212
b. Subject: Final Environmental Impact Statement
c. Lead Agency: Federal Energy Regulatory Commission
d. Abstract: The Grant Lake Hydroelectric Project would be located on Grant
Creek near the community of Moose Pass, Kenai Peninsula
Borough, Alaska.
Kenai Hydro, LLC, proposes to construct an intake structure in
Grant Lake, pumped bypass flow system, tunnel, surge chamber,
penstock, powerhouse, tailrace channel with fish exclusion barrier,
tailrace detention pond, access roads, step-up transformer, breaker,
switchyard, and overhead transmission line. The powerhouse
would contain two Francis turbine generating units with a
combined rated capacity of 5 megawatts with a maximum design
flow of 385 cubic feet per second and proposed average annual
generation of 18,600 megawatt-hours.
The staff’s recommendation is to license the project as proposed by
Kenai Hydro, LLC, with certain modifications and additional
measures recommended by the agencies.
e. Contact: Kenneth Hogan
Federal Energy Regulatory Commission
Office of Energy Projects
888 First Street, N.E.
Washington, D.C. 20426
(202) 502-8434
f. Transmittal: This final environmental impact statement on an application to
construct and operate the Grant Lake Hydroelectric Project is being
made available for public comment on or about May 1, 2019, as
required by the National Environmental Policy Act of 1969 1 and
the Commission’s Regulations Implementing the National
Environmental Policy Act (18 Code of Federal Regulations, Part
380).
1 National Environmental Policy Act of 1969, amended (Pub. L. 91-190, 42 U.S.C.
4321–4347, January 1, 1970, as amended by Pub. L. 94-52, July 3, 1975, Pub. L. 94-83,
August 9, 1975, and Pub. L. 97-258, §4(b), September 13, 1982).
iv
FOREWORD
The Federal Energy Regulatory Commission (Commission), pursuant to the
Federal Power Act (FPA)2 and the U.S. Department of Energy Organization Act 3 is
authorized to issue licenses for up to 50 years for the construction and operation of non-
federal hydroelectric development subject to its jurisdiction, on the necessary conditions:
“That the project adopted…shall be such as in the judgment of the Commission
will be best adapted to a comprehensive plan for improving or developing a waterway or
waterways for the use or benefit of interstate or foreign commerce, for the improvement
and utilization of water-power development, for the adequate protection, mitigation, and
enhancement of fish and wildlife (including related spawning grounds and habitat), and
for other beneficial public uses, including irrigation, flood control, water supply, and
recreational and other purposes referred to in section 4(e)…”4
The Commission may require such other conditions consistent with the FPA and
as may be found necessary to provide for the various public interests to be served by the
project.5 Compliance with such conditions during the licensing period is required. The
Commission’s Rules of Practice and Procedure allow any person objecting to a licensee’s
compliance or noncompliance with such conditions to file a complaint noting the basis
for such objection for the Commission’s consideration.6
2 16 U.S.C. § 791(a)-825r, as amended by the Electric Consumers Protection Act
of 1986, Pub. L. 99-495 (1986), the Energy Policy Act of 1992, Pub. L. 102-486 (1992),
and the Energy Policy Act of 2005, Pub. L. 109-58 (2005).
3 Pub. L. 95-91, 91 Stat. 556 (1977).
4 16 U.S.C. § 803(a).
5 16 U.S.C. § 803(g).
6 18 C.F.R. § 385.206 (2018).
v
TABLE OF CONTENTS
COVER SHEET ................................................................................................................. iii
FOREWORD ...................................................................................................................... iv
TABLE OF CONTENTS .................................................................................................... v
LIST OF FIGURES .......................................................................................................... viii
LIST OF TABLES............................................................................................................. xii
ACRONYMS AND ABBREVIATIONS.......................................................................... xv
EXECUTIVE SUMMARY ............................................................................................. xvii
1.0 INTRODUCTION ................................................................................................. 1-1
1.1 APPLICATION .......................................................................................... 1-1
1.2 PURPOSE OF ACTION AND NEED FOR POWER ............................... 1-1
1.2.1 Purpose of Action ......................................................................... 1-1
1.2.2 Need for Power ............................................................................. 1-3
1.3 STATUTORY AND REGULATORY REQUIREMENTS ...................... 1-4
1.3.1 Federal Power Act ........................................................................ 1-4
1.3.2 Clean Water Act ........................................................................... 1-5
1.3.3 Endangered Species Act ............................................................... 1-5
1.3.4 Coastal Zone Management Act .................................................... 1-5
1.3.5 National Historic Preservation Act ............................................... 1-6
1.3.6 Magnuson-Stevens Fishery Conservation and Management
Act ................................................................................................ 1-6
1.3.7 National Trails System Act .......................................................... 1-6
1.4 PUBLIC REVIEW AND COMMENT ...................................................... 1-7
1.4.1 Scoping ......................................................................................... 1-7
1.4.2 Interventions ................................................................................. 1-9
1.4.3 Comments on the Application .................................................... 1-10
1.4.4 Comments on the Draft Environmental Impact Statement ........ 1-10
2.0 PROPOSED ACTION AND ALTERNATIVES .................................................. 2-1
2.1 NO-ACTION ALTERNATIVE ................................................................. 2-1
2.2 APPLICANT’S PROPOSAL ..................................................................... 2-1
2.2.1 Project Facilities ........................................................................... 2-1
2.2.2 Project Safety ................................................................................ 2-6
2.2.3 Project Operation .......................................................................... 2-6
2.2.4 Environmental Measures .............................................................. 2-8
vi
2.2.5 Modifications to Applicant’s Proposal—Mandatory
Conditions .................................................................................. 2-11
2.3 STAFF ALTERNATIVE ......................................................................... 2-12
2.4 STAFF ALTERNATIVE WITH MANDATORY CONDITIONS ......... 2-16
3.0 ENVIRONMENTAL ANALYSIS ........................................................................ 3-1
3.1 DESCRIPTION OF THE RIVER BASIN ................................................. 3-1
3.2 SCOPE OF CUMULATIVE EFFECTS ANALYSIS ............................... 3-1
3.2.1 Geographic Scope ......................................................................... 3-2
3.2.2 Temporal Scope ............................................................................ 3-2
3.3 PROPOSED ACTION AND ACTION ALTERNATIVES ...................... 3-3
3.3.1 Geologic and Soil Resources ........................................................ 3-3
3.3.2 Aquatic Resources ...................................................................... 3-17
3.3.3 Terrestrial Resources ................................................................ 3-113
3.3.4 Recreation Resources and Land Use ........................................ 3-146
3.3.5 Aesthetic Resources .................................................................. 3-173
3.3.6 Cultural Resources .................................................................... 3-190
3.3.7 Socioeconomic Resources ........................................................ 3-206
3.4 NO-ACTION ALTERNATIVE ............................................................. 3-216
4.0 DEVELOPMENTAL ANALYSIS ....................................................................... 4-1
4.1 POWER AND DEVELOPMENTAL BENEFITS OF THE PROJECT .... 4-1
4.2 COMPARISON OF ALTERNATIVES ..................................................... 4-3
4.2.1 No-action Alternative ................................................................... 4-4
4.2.2 Applicant’s Proposal .................................................................... 4-4
4.2.3 Staff Alternative ........................................................................... 4-4
4.2.4 Staff Alternative with Mandatory Conditions .............................. 4-4
4.3 COST OF ENVIRONMENTAL MEASURES.......................................... 4-4
5.0 CONCLUSIONS AND RECOMMENDATIONS ................................................ 5-1
5.1 COMPREHENSIVE DEVELOPMENT AND RECOMMENDED
ALTERNATIVE ........................................................................................ 5-1
5.1.1 Measures Proposed by Kenai Hydro ............................................ 5-1
5.1.2 Additional Measures Recommended by Staff .............................. 5-5
5.1.3 Measures Not Recommended by Staff ....................................... 5-27
5.2 UNAVOIDABLE ADVERSE EFFECTS ................................................ 5-30
5.3 SUMMARY OF SECTION 10(J) RECOMMENDATIONS AND 4(E)
CONDITIONS .......................................................................................... 5-31
5.3.1 Fish and Wildlife Agency Recommendations ............................ 5-31
5.3.2 Land Management Agencies’ Section 4(e) Conditions .............. 5-42
5.4 CONSISTENCY WITH COMPREHENSIVE PLANS ........................... 5-43
6.0 LITERATURE CITED .......................................................................................... 6-1
vii
7.0 LIST OF PREPARERS ......................................................................................... 7-1
8.0 LIST OF RECIPIENTS ......................................................................................... 8-1
APPENDIX A—Comments on Draft Environmental Impact Statement
APPENDIX B—Final Terms and Conditions
viii
LIST OF FIGURES
Figure 1-1. Proposed location of the Grant Lake Project ............................................. 1-2
Figure 2-1. Proposed Grant Lake Project facilities ....................................................... 2-2
Figure 2-2. Enlargement of proposed Grant Lake Project intake, bypass pipe, and
weir ............................................................................................................. 2-3
Figure 3-1. Water quality/water temperature study locations ..................................... 3-22
Figure 3-2. Grant Creek water temperatures, 2009–2013 .......................................... 3-25
Figure 3-3. Mean daily temperatures at all Grant Creek sites, 2013 .......................... 3-26
Figure 3-4. Grant Lake temperature profiles, 2013 .................................................... 3-27
Figure 3-5. Grant Creek stream profile generated from light detection and ranging . 3-35
Figure 3-6. Current and with project average Grant Lake water surface elevation .... 3-40
Figure 3-7. Grant Creek flows downstream of the proposed powerhouse for
current conditions and conditions with the project in place (2013) ......... 3-45
Figure 3-8. Comparison of daily mean water temperatures in Grant Creek and
Grant Lake near the proposed intake structure at a depth of 1.5 meters,
January 2013–June 2014 .......................................................................... 3-56
Figure 3-9. Average monthly temperature differences between Grant Creek sites
and Grant Lake, 2013 ............................................................................... 3-58
Figure 3-10. Cross section of intake facility ................................................................. 3-59
Figure 3-11. Daily mean temperatures measured at Site GC500 in 2013 and
estimated under proposed project operation ............................................. 3-62
Figure 3-12. Boxplots of estimated project effect on temperature at the lower end
of the bypassed reach at Site GC500 ........................................................ 3-62
Figure 3-13. Proposed flow and temperature monitoring locations in the Grant
Lake Project vicinity ................................................................................ 3-64
Figure 3-14. Differences in 7-day average and daily temperatures versus average
monthly temperature difference in Grant Creek and Grant Lake, May,
2013 .......................................................................................................... 3-67
ix
Figure 3-15. Box and whisker plot showing temperature differences between
Grant Creek Site ST-2 (GC200) and Grant Lake at 0.5 meter, 2013 ....... 3-68
Figure 3-16. Annual mean daily and proposed minimum flows in Grant Creek
below the tailrace ...................................................................................... 3-81
Figure 3-17. Estimated weighted usable area for Chinook, coho, and sockeye
salmon and Dolly Varden and rainbow trout spawning and incubation
under proposed minimum flows and existing average monthly flows
in the Grant Creek anadromous reach ...................................................... 3-83
Figure 3-18. Estimated weighted usable area for Chinook and coho salmon and
Dolly Varden and rainbow trout fry rearing under proposed minimum
flows and existing average monthly flows in the Grant Creek
anadromous reach ..................................................................................... 3-85
Figure 3-19. Estimated weighted usable area for Chinook and coho salmon and
Dolly Varden and rainbow trout juvenile rearing under proposed
minimum flows and existing average monthly flows in the Grant
Creek anadromous reach .......................................................................... 3-86
Figure 3-20. Estimated weighted usable area for Dolly Varden and rainbow trout
adult rearing under proposed minimum flows and existing average
monthly flows in the Grant Creek anadromous reach .............................. 3-87
Figure 3-21. Downramping events in Grant Creek that were greater than 1 inch per
hour during the period of record, May 31, 2013, through October 10,
2014 .......................................................................................................... 3-91
Figure 3-22. Adult and juvenile rearing WUA, Reach 3 side channels ..................... 3-101
Figure 3-23. Reach 1 distributary spawning, fry rearing, and juvenile/adult rearing
WUA ...................................................................................................... 3-102
Figure 3-24. Recreation facilities, trails, and public roads near the Grant Lake
Project ..................................................................................................... 3-148
Figure 3-25. Planned and constructed INHT routes in the vicinity of the project ...... 3-149
Figure 3-26. Number of summer visitors observed by monitoring location and
recreation activity ................................................................................... 3-152
Figure 3-27. Land ownership in the vicinity of the Grant Lake Project ..................... 3-154
x
Figure 3-28. Kenai Area Management Plan management units near the project.
Unit numbers are highlighted in yellow ................................................. 3-158
Figure 3-29. Planned INHT route near the proposed project infrastructure ............... 3-165
Figure 3-30. View of the project area, looking south ................................................. 3-174
Figure 3-31. Landscape units for analyzing aesthetic resources ................................ 3-175
Figure 3-32. Scenic integrity objectives for National Forest System land in the
vicinity of the project ............................................................................. 3-176
Figure 3-33. Simulations showing changes in water surface elevations associated
with the project operation in from October through April ..................... 3-180
Figure 3-34. Simulations showing changes in water surface elevations associated
with the project operation in May .......................................................... 3-181
Figure 3-35. Simulations showing changes in water surface elevations associated
with the project operation in June .......................................................... 3-182
Figure 3-36. Simulations showing changes in water surface elevations associated
with the project operation in July ........................................................... 3-183
Figure 3-37. Simulations showing changes in water surface elevations associated
with the project operation in August ...................................................... 3-184
Figure 3-38. Simulations showing changes in water surface elevations associated
with the project operation in September ................................................ 3-185
Figure 3-39. Existing view (left) and visual simulation (right) of the proposed
project access road intersecting the Seward Highway ........................... 3-186
Figure 3-40. Existing view (left) and visual simulation (right) of the proposed
project access road crossing the proposed re-route of the INHT ........... 3-187
Figure 3-41. Visual simulation of the proposed project access road crossing (lower
right corner) the planned INHT route .................................................... 3-188
Figure 3-42. Visual simulation of the proposed powerhouse from planned INHT
route (view looking west from the planned INHT route) ...................... 3-188
Figure 3-43. Visual simulation of the proposed powerhouse (on right side of
figure) from planned INHT route (view looking south toward the
planned trail bridge crossing Grant Creek) ............................................ 3-189
xi
Figure 3-44. General Kenai Peninsula land ownership delineation ............................ 3-209
Figure 3-45. Land use in the Kenai Peninsula Borough ............................................. 3-210
xii
LIST OF TABLES
Table 3-1. Relative erodibility integrating erosion susceptibility with wave
energy potential .......................................................................................... 3-7
Table 3-2. Areas temporarily disturbed by project construction ............................... 3-13
Table 3-3. Streamflow gage information for gages used in developing the
synthesized flow record for Grant Creek ................................................. 3-18
Table 3-4. Minimum, maximum, and mean monthly and annual synthesized flow
values for Grant Creek 1948–2013 .......................................................... 3-18
Table 3-5. Alaska DEC water quality standards applicable to the project area ........ 3-19
Table 3-6. Water quality sampling events at Grant Creek and Grant Lake sites,
2009–2013 ................................................................................................ 3-21
Table 3-7. Run timing by week of year for pink, Chinook, sockeye, and coho
salmon assessed at weir on Grant Creek, 2013 ........................................ 3-29
Table 3-8. New redds constructed in Grant Creek by week of the year for pink,
Chinook, sockeye and coho salmon in 2013 ............................................ 3-30
Table3-9. Grant Creek salmonid periodicity ............................................................ 3-31
Table 3-10. Number and proportion of redds counted in 2013 in each reach of
Grant Creek for pink, Chinook, sockeye, and coho salmon ..................... 3-32
Table 3-11. Habitat use by location based on mobile telemetry surveys for radio
tagged rainbow trout in Grant Creek, 2014 .............................................. 3-33
Table 3-12. Number, proportion, and catch-per-unit-effort of fish caught in Trail
Lake Narrows with minnow traps, July 2013 .......................................... 3-33
Table 3-13. Mesohabitats found in Grant Creek ......................................................... 3-36
Table 3-14. Aquatic habitats found in Grant Creek ..................................................... 3-36
Table 3-15. Average inter-monthly Grant Lake water surface elevation change ........ 3-43
Table 3-16. Grant Lake withdrawal depths with least effect on downstream
temperatures ............................................................................................. 3-57
Table 3-17. Summary of Kenai Hydro proposed and agency 10(j) monitoring
recommendations ...................................................................................... 3-65
xiii
Table 3-18. Grant Lake storage and surface area relative to lake elevation ................ 3-72
Table 3-19. Kenai Hydro’s proposed and the resource agencies recommended
minimum instream flows for the Grant Creek bypassed reach ................ 3-75
Table 3-20. Minimum depth criteria required for species found in Grant Creek ........ 3-76
Table 3-21. Existing mean monthly discharge and proposed minimum flows in
Grant Creek below the tailrace ................................................................. 3-79
Table 3-22. Estimated weighted usable area for all species and life stages of
salmonids under Kenai Hydro-proposed and FWS-, NMFS-, Alaska
DFG-recommended minimum flows in the Grant Creek anadromous
reach ......................................................................................................... 3-88
Table 3-23. Number of stage changes greater than 1 inch per hour and maximum
hourly stage difference in inches in Grant Creek, May 31, 2013,
through October 10, 2014 ......................................................................... 3-92
Table 3-24. Vegetation communities/habitats within the project study area ............ 3-114
Table 3-25. Wetlands and other waters within the proposed project lands ............... 3-115
Table 3-26. Forest Service sensitive species, species of special interest, and
species of conservation concern potentially occurring on proposed
project lands ........................................................................................... 3-118
Table 3-27. Permanent and temporary effects on vegetation along the existing
and proposed INHT route ....................................................................... 3-128
Table 3-28. Minimum annual rainfall requirements for preferred moose browse
species in the Grant Lake basin .............................................................. 3-144
Table 3-29. Land use designations and management direction for Kenai Area
Plan management units ........................................................................... 3-159
Table 3-30. Eligible cultural resources within the project APE ................................ 3-196
Table 3-31. Project effects on eligible cultural resources within the project APE
and proposed treatment .......................................................................... 3-198
Table 3-32. Population growth (number and percent of change) in the Kenai
Peninsula Borough and selected places in the borough (2010–2016).... 3-206
Table 3-33. Population Demographic Profile for Selected Places within Kenai
Peninsula Borough near the project area, 2016 ...................................... 3-207
xiv
Table 3-34. Kenai Peninsula Borough land ownership information ......................... 3-208
Table 3-35. Population industry and employment profile for selected places within
Kenai Peninsula Borough near the project area, 2016 ........................... 3-211
Table 3-36. Population income and occupation profile for selected places within
Kenai Peninsula Borough near the project area, 2016 ........................... 3-212
Table 3-37. Kenai Hydro monthly labor estimates and associated payroll
expenditures for construction of the Grant Lake Project ....................... 3-214
Table 4-1. Parameters for the economic analysis of the Grant Lake Project .............. 4-2
Table 4-2. Summary of the annual cost of alternative power and annual project
cost for the alternatives for the Grant Lake Project ................................... 4-3
Table 4-3. Cost of environmental mitigation and enhancement measures
considered in assessing the environmental effects of constructing and
operating the Grant Lake Project ............................................................... 4-5
Table 5-1. Fish and wildlife agency recommendations for the Grant Lake Project .. 5-35
Table 5-2. Forest Service final section 4(e) conditions for the Grant Lake Project .. 5-42
xv
ACRONYMS AND ABBREVIATIONS
μg/L micrograms per liter
Advisory Council Advisory Council on Historic Preservation
AHRS Alaska Heritage Resources Survey
Alaska DEC Alaska Department of Environmental Conservation
Alaska DFG Alaska Department of Fish and Game
Alaska DNR Alaska Department of Natural Resources
APE area of potential effects
APLIC Avian Power Line Interaction Committee
Applicant Kenai Hydro, LLC
ARRC Alaska Railroad Corporation
BMP best management practices
ºC degrees Celsius
CFR Code of Federal Regulations
cfs cubic feet per second
Commission Federal Energy Regulatory Commission
CZMA Coastal Zone Management Act
DO dissolved oxygen
ECM environmental compliance monitor
EFH Essential Fish Habitat
EIS environmental impact statement
EPA U.S. Environmental Protection Agency
ESCP erosion and sediment control plan
FERC Federal Energy Regulatory Commission
Forest Service U.S. Department of Agriculture, Forest Service
FPA Federal Power Act
FWS U.S. Department of the Interior, Fish and Wildlife Service
HPMP Historic Properties Management Plan
INHT Iditarod National Historic Trail
INHT Plan comprehensive management plan for the INHT
Interior U.S. Department of the Interior
Kenai Hydro Kenai Hydro, LLC
kV kilovolt
LWD large woody debris
mg/kg milligram per kilogram
mg/L milligram per liter
MW megawatt
MWh megawatt-hour
National Register National Register of Historic Places
xvi
NFS lands National Forest System lands (public land managed by the Forest
Service)
NHPA National Historic Preservation Act of 1966
NMFS U.S. Department of Commerce, National Oceanic and Atmospheric
Administration, National Marine Fisheries Service
NTU nephelometric turbidity unit
O&M operation and maintenance
Park Service National Park Service
PHABSIM physical habitat simulation model
Railbelt Alaska Railbelt
RHABSIM riverine habitat simulation model
ROW right-of-way
SD1 Scoping Document 1
SD2 Scoping Document 2
SD3 Scoping Document 3
SD4 Scoping Document 4
SHPO State Historic Preservation Officer
SMART specific, measurable, achievable, realistic, and time-bound
(objectives)
TCP traditional cultural property
TLP traditional licensing process
U.S.C. United States Code
USGS U.S. Geological Survey
WUA weighted usable area
xvii
EXECUTIVE SUMMARY
Proposed Action
On April 18, 2016, Kenai Hydro, LLC (Kenai Hydro or applicant), filed an
application for a license with the Federal Energy Regulatory Commission (Commission
or FERC) to construct and operate the proposed Grant Lake Hydroelectric Project (Grant
Lake Project or project). Kenai Hydro amended the application on January 16, 2018. On
May 23, 2018, Kenai Hydro modified its proposed measures by agreeing to some agency
recommendations or proposing alternative measures. On August 6, 2018, after further
consultation with agencies, Kenai Hydro filed a revised proposal for minimum flows
downstream of the proposed tailrace. The proposed 5-megawatt (MW) project would be
located on Grant Lake and Grant Creek, near the community of Moose Pass within the
Kenai Peninsula Borough of Alaska, and would generate about 18,600 megawatt-hours
(MWh) of energy annually. The project would occupy 1,688.7 acres of federal land
within the Chugach National Forest, administered by U.S. Department of Agriculture,
Forest Service (Forest Service).
Project Description and Proposed Facilities
The project would require the construction of the following new facilities: (1) a
reinforced concrete intake with an outside dimension of 38 feet by 20 feet, intake
trashracks, and a vertical turbine pump to provide base flows; (2) a 100-foot-long
concrete bypass weir at the natural Grant Lake outlet with a crest elevation at 703 feet;
(3) a buried, 400-foot-long, 16-inch-diameter bypass flow pipe to carry pumped flows
from the intake to just below the bypass weir; (4) a 3,300-foot-long tunnel from the
project intake to the powerhouse that transitions to a 6-foot-diameter, steel penstock
about 150 feet from the powerhouse; (5) a 100-foot-long by 50-foot-wide powerhouse
with two horizontal Francis type turbine/generator units with a total rated capacity of 5
MW; (6) a trapezoidal tailrace channel with a bottom width of 74 feet and a channel
depth ranging from 13 feet at the powerhouse to 8 feet at the creek; (7) a 3.6-acre tailrace
detention pond with 15 acre-feet of storage capacity; and (8) a 5,567-foot-long, 115-
kilovolt transmission line. The project would bypass stream flows around 0.6 mile of
Grant Creek (bypassed reach).
Project Operation
The project would use inflow into and storage within Grant Lake to generate
power and meet any minimum flow requirements within Grant Creek. Under Kenai
Hydro’s proposed operation, Grant Lake’s elevation would vary from a normal maximum
xviii
elevation of 703 feet,7 which is the elevation of the natural Grant Lake outlet, down to a
minimum lake elevation of 690 feet. To provide storage for spring flows, Kenai Hydro
would draw down the lake during the winter and use these reservoir releases to generate
power and meet instream flows requirements in Grant Creek. Kenai Hydro proposes to
maximize power benefits by taking advantage of spinning reserve 8 and load-following
operations 9 (peaking). The project intake would include variable depth withdrawal
locations to control water temperatures in Grant Creek.
The powerhouse would operate with a minimum hydraulic capacity of 58 cubic
feet per second (cfs) (one unit) and a maximum hydraulic capacity of 385 cfs (total for
two units). Any minimum flow requirements in the bypassed reach would be provided
from the penstock intake structure and pumped through a bypass pipe to the downstream
side of the bypass weir. Flows provided via the bypass pipe would travel approximately
0.6 mile downstream to where the powerhouse tailrace channel would discharge into
Grant Creek, after which the combined flows would travel downstream to Trail Lake
Narrows (the narrow channel between Upper Trail Lake and Lower Trail Lake).
An off-stream detention pond would provide a temporary storage reservoir for
flows generated during rare instances when the units being used for spinning reserve are
needed for the electrical transmission grid. To prevent a sudden increase in the water
surface levels of Grant Creek as a result of the increased flows generated, the additional
powerhouse flows would be diverted into the detention pond and then released slowly
back into Grant Creek. The discharge associated with a spinning reserve event would be
dispersed via the tailrace channel that flows into Grant Creek. Once the spinning reserve
demand is met, Kenai Hydro would reduce generation at the unit or bring it offline and
slowly release flow from the detention pond back into the powerhouse tailrace.
Proposed Environmental Measures
Kenai Hydro proposes the following environmental measures to protect or
enhance environmental resources at the project:
7 All elevations are in North American Vertical Datum 88.
8 Spinning reserve is the extra generating capacity that is available by increasing
the power output of generators that are already connected to the power system. Non-
spinning reserve or supplemental reserve is the extra generating capacity that is not
currently connected to the system but can be brought online after a short delay.
9 Under load-following, or peaking operations, the project would adjust its power
output as demand for electricity fluctuates throughout the day.
xix
Project Construction
• Designate a third-party environmental compliance monitor (ECM) to
oversee construction activities and ensure compliance with measures to
protect natural resources.
• Develop an erosion and sediment control plan (ESCP) that includes best
management practices (BMPs) to prevent sediment mobilized during
construction from entering Grant Creek or Grant Lake.
• Restore areas disturbed by construction to pre-existing conditions.
• Develop a hazardous materials containment/fuel storage plan that includes
measures to contain all hazardous materials used during construction.
• Consult with the Alaska Department of Fish and Game (Alaska DFG), U.S.
Department of Commerce, National Oceanic and Atmospheric
Administration, National Marine Fisheries Service, and U.S. Department of
the Interior, Fish and Wildlife Service (FWS) to finalize design details for
fish exclusion measures in the tailrace.
• Consult with Alaska DFG’s habitat biologist to establish timing windows
for instream construction and stream-crossing activities.
• Develop a bear safety plan that includes: (1) keeping construction sites and
refuse areas clear of substances that attract bears, (2) installing bear-proof
garbage receptacles and other measures during construction to prevent
bears from obtaining food or garbage, (3) minimizing possible conflict with
bears during construction and operation, (4) establishing protocols for
dealing with problem bears,10 and (5) notifying authorities of any bear-
human conflict.
Project Operation
• Provide the following minimum flows in the bypassed reach: 5 cfs from
January 1 through July 31, 10 cfs from August 1 through September 31, 7
cfs from October 1 through October 31, and 6 cfs from November 1
through December 31 to protect aquatic habitat and support benthic
macroinvertebrates.
• Provide the following instantaneous minimum flows downstream of the
tailrace: 60 cfs from January 1 through May 15, 80 cfs from May 16
10 Although Kenai Hydro and the agencies do not specifically define problem
bears, we understand this term to refer to bears that repeatedly visit a construction area
despite implementation of other measures in the plan, including trash management and
use of bear-proof containers.
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through May 31, 150 cfs from June 1 through June 30, 195 cfs from July 1
through September 1, 150 cfs from September 1 through September 30, 125
cfs from October 1 through October 15, 72 cfs from October 16 through
November 15, and 60 cfs from November 16 through December 31 to
protect habitat for salmonids and benthic macroinvertebrates.
• Use variable depth withdrawals from the project intake to control water
temperature in Grant Creek.
• Provide channel maintenance flows of 800 cfs to the Grant Creek bypassed
reach for a continuous 8-hour duration, once per year, in a minimum of 2
years in each moving 10-year period to promote sediment recruitment and
transport from the bypassed reach to Grant Creek.
• Limit upramping rates to 1 inch per hour during the winter (November 16
through May 15) and 2 inches per hour during the summer (May 16
through November 15). Limit downramping rates to 1 inch per hour from
November 16 through May 15 and 2.25 inches per hour from May 16
through November 15.
• Implement the Operation Compliance Monitoring Plan (filed on January
16, 2018) that includes: (1) lake level and temperature monitoring in Grant
Lake; (2) flow and temperature monitoring in Grant Creek bypassed reach;
(3) flow and temperature monitoring in Grant Creek tailrace; (4) failsafe
provisions; (5) a schedule for installing, maintaining, and collecting flow
and temperature instrumentation; and (6) reporting.
• Develop a spill prevention, control, and containment plan and a hazardous
materials containment/fuel storage plan to prevent hazardous materials
from entering Grant Creek or Grant Lake during construction and
operations.
• Implement the Biotic Monitoring Plan (filed on January 16, 2018) that
includes monitoring juvenile and adult salmonid abundance and habitat use,
and monitoring gravel transport in Grant Creek to assess project effects on
salmonid spawning habitat.
• Conduct biological monitoring in Grant Creek to determine the need for
gravel augmentation as well as the effectiveness of the proposed
enhancement/mitigation measures, including minimum flows in the
bypassed reach and minimum flows downstream of the tailrace, and to
evaluate the need for removal of a log jam to increase flow in a Grant Creek
side channel.
• Implement the Vegetation Management Plan (filed on January 16, 2018)
that includes: (1) invasive plant management and control, (2) revegetation,
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(3) vegetation maintenance, (4) sensitive plant species protection and
monitoring, and (5) pale poppy population management.
• Implement the Avian Protection Plan (filed on January 16, 2018) that
addresses migratory species and bald eagles and minimizes potential for
electrocutions or collisions with the project transmission line.
• Develop an Iditarod National Historic Trail (INHT) re-route plan that
includes constructing the southern half of the proposed INHT re-route from
the existing route to Grant Creek.
• Restrict public access to the project using signage and gating/fencing of the
access road to address local residents’ concerns about encouraging
motorized use near the project and reduce the potential for unauthorized
motorized use and on adjacent National Forest System lands (NFS lands).
• Develop a fire prevention plan.
• Implement the Historic Properties Management Plan (HPMP) (filed on
January 16, 2018) to protect historic properties in the project area.
Public Involvement
Before filing its license application, Kenai Hydro conducted pre-filing
consultation under the Commission’s traditional licensing process (TLP). The intent of
the Commission’s pre-filing process is to initiate public involvement early in the project
planning process and to encourage citizens, governmental entities, tribes, and other
interested parties to identify and resolve issues prior to formal filing of the application
with the Commission.
As part of the National Environmental Policy Act scoping process, we distributed
a scoping document (SD1) on May 11, 2010.11 Two scoping meetings were held on June
2 and June 3, 2010, in Moose Pass, Alaska. Based on comments made during the scoping
meetings and written comments filed with the Commission, we issued a revised scoping
document (SD2) on August 23, 2010. On April 18, 2016, Kenai Hydro filed its final
11 In response to Kenai Hydro’s August 6, 2009, request to use the TLP, the Forest
Service and Alaska DFG filed comments on September 4 and 8, 2009, respectively,
supporting the use of the TLP and requesting that scoping be held early in the licensing
process. Although we do not typically conduct scoping in the TLP until after a license
application has been filed, in our September 15, 2009, letter authorizing the use of the
TLP, we agreed to conduct scoping earlier to facilitate the identification of issues and
development of any needed studies.
xxii
license application. Upon review of the final license application, we found that the
proposed project differed substantially from Kenai Hydro’s original proposal described in
the Preliminary Application Document. As a result, we issued a third scoping document
(SD3) on July 22, 2016, and held two scoping meetings on September 7 and 8, 2016, in
Moose Pass, Alaska. Based on comments made during the scoping meetings and written
comments filed with the Commission, we issued a revised scoping document (SD4) on
December 7, 2016. Kenai Hydro filed an amended license application on January 16,
2018. On February 8, 2018, we issued a notice that Kenai Hydro’s application for an
original license for the Grant Lake Project was ready for environmental analysis, and
requesting comments, terms and conditions, recommendations, and prescriptions.
Written comments on the draft EIS were due March 1, 2019.12 In addition, oral
testimony on the draft EIS was received during two public meetings held in Moose Pass,
Alaska, on November 28, 2018.13 Appendix A lists the commenters who provided
written comments, summarizes the substantive comments that were filed, includes staff
responses to those comments, and indicates locations in the final EIS that were revised, as
appropriate.
Alternatives Considered
This final environmental impact statement analyzes the effects of the proposed
project’s construction and operation and recommends conditions for any license that may
be issued for the project. In addition to Kenai Hydro’s proposal, we consider three
alternatives: (1) no-action, whereby the project would not be licensed and constructed;
(2) Kenai Hydro’s proposal with staff modifications (staff alternative); and (3) the staff
alternative with all mandatory conditions.
Staff Alternative
Under the staff alternative, the project would include most of Kenai Hydro’s
proposed measures, with the following exceptions. We do not recommend the proposed
Biotic Monitoring Plan because the proposed fishery monitoring efforts do not provide
direct benefits to the fishery, and it is not clear how the proposed fish monitoring would
12 The notice established December 10, 2018, as the due date for filing comments
on the draft EIS; however, in response to the November 30, 2018, Alaska DFG and the
December 6, 2018, NMFS requests for an extension of time to file comments on the draft
EIS, on December 6, 2018 the Commission extended the comment period to January 9,
2019. Subsequently, due to the funding lapse at certain federal agencies between
December 22, 2018 and January 25, 2019, on February 11, 2019, the Commission
extended the comment period to March 1, 2019.
13 The transcripts from the meetings were filed in the administrative record for the
project on January 9, 2019.
xxiii
inform project-related matters given that it is not designed to isolate project effects from
other non-project-related variables that could affect fish populations. In addition, the
project record contains sufficient information on which to base license conditions such
that there is no project-related benefit to requiring additional study. We recognize the
proposed Biotic Monitoring Plan also includes a proposal to monitor salmonid spawning
gravel and we address gravel monitoring below. We do not recommend the removal of
the existing logjam in Reach 1 because it provides habitat for aquatic resources. We do
not recommend the INHT re-route plan because the proposed project infrastructure is
compatible with the existing INHT route, and no re-routing is necessary.
The staff alternative also includes the following recommended modifications of
Kenai Hydro’s proposal and some additional measures.
Project Construction
• Include in the proposed measure to designate a third-party ECM a provision
for the ECM to have stop work authority.
• Modify the proposed ESCP to include: (1) a description of existing soil,
groundwater, and vegetation conditions; (2) site-specific preventive
measures; (3) identification of areas for storage or deposition of overburden
and implementation of erosion control measures in those areas;
(4) measures to sample for lead in Grant Lake sediments that could be
disturbed by project construction and operation, and, if lead is present,
measures to prevent mobilization; and (5) an implementation schedule.
• A construction plan that includes: (1) a detailed construction schedule; (2)
a description of construction methods and BMPs to be employed, and
measures to reduce the risk of introduction and spread of invasive plants;
(3) delineation of construction areas using fencing and/or flagging;
(4) measures for avoiding streams, wetlands, and pond habitats to the extent
possible during construction; (5) provisions for the training of construction
staff regarding environmental laws, regulations, and BMPs to avoid or
reduce effects on all native plant and wildlife species including special-
status species and their habitats; and (6) identification of other resource-
specific protection plans that should be considered during construction
activities.
• A spoils disposal plan that includes: (1) means and methods to dispose of
any materials excavated during construction, (2) mapped locations of any
proposed temporary and/or permanent spoil pile locations, (3) descriptions
of the composition of any materials expected to be excavated on the site,
(4) proposed use of excavated materials in the construction process, (5) any
plans to dispose of materials off site, (6) methods for preventing spoil
materials from leaching from spoil piles into adjacent waterways and
xxiv
wetlands, and (7) identification of other resource-specific protection plans
that should be considered during construction activities.
• Modify the proposed Avian Protection Plan to include nest surveys prior to
any construction activities that have the potential to disturb nesting birds,
not just before vegetation clearing activities.
• Avoid the use of helicopters or airplanes near the mountainside adjacent to
Grant Lake and Grant Creek, maintain a 1,500-foot clearance between
aircraft and mountain goat habitat, and follow Forest Service no-fly zones
to protect mountain goats.
Project Operation
• Develop a solid waste and wastewater plan to protect water quality in Grant
Creek from waste and sewage generated on site.
• Combine the proposed hazardous materials containment/fuel storage plan
and spill prevention control and containment plan into a single hazardous
materials plan that includes the following measures to be implemented
during project construction and operations: (1) designation of specific
areas to maintain and refuel vehicles and equipment, (2) measures for
containment and cleanup in the event of a spill or accident, (3) provisions to
remove oil and other contaminants from condensate and leakage from the
turbines and other equipment in the powerhouse, and (4) a reporting
schedule.
• Limit downramping rates to a year-round maximum of 1 inch per hour
(when operational control exists).
• Develop an operation compliance monitoring and reporting plan that
includes: (1) real-time water surface elevation monitoring of Grant Lake
and real-time temperature monitoring within Grant Lake near the intake at a
depth of 0.5 meter; (2) real-time flow monitoring in the Grant Creek
bypassed reach; (3) real-time flow and temperature monitoring in Grant
Creek downstream of the tailrace; (4) provisions to minimize effects of
equipment malfunction on Grant Creek water temperature; (5) a schedule
for installing, maintaining, and collecting flow and temperature
instrumentation; and (6) reporting of Grant Creek water temperatures and
Grant Lake elevations.
• Adjust the intake withdrawal depth on a real-time basis based on the real-
time Grant Creek and Grant Lake temperature monitoring to ensure Grant
Creek temperature below the tailrace meets the following: (1) for the 30-
day period when Grant Lake is going through its ice break-up, Grant Creek
temperature be maintained at the temperature recorded in Grant Lake at a
depth of 0.5 meter + 1.0°C (+/- 0.5°C); (2) once the ice break-up is
xxv
complete and Grant Lake is ice-free, Grant Creek temperatures remain
within +/-0.5°C of Grant Lake temperature measured at a 0.5 meter depth,
and (3) the same +/-0.5°C criterion be maintained when Grant Lake is ice-
covered.
• Develop and implement a salmonid spawning gravel monitoring plan, that
includes: (1) methods to assess the distribution and abundance of salmonid
spawning gravel; (2) spawning gravel assessments in years 1, 10, 15, 20,
and 30; and (3) a trend analysis in years 20 and 30 to determine the rate of
any spawning gravel reduction and appropriate measures to address any
reduction in spawning gravel recruitment; and (4) reporting schedule to
include reports after each sampling year.
• Modify the Vegetation Management Plan to also include: (1) locating
equipment inspections and/or wash stations well outside of riparian/aquatic
zones; (2) treating aquatic invasive plants if any are detected in project
waters; (3) monitoring the success of revegetation efforts monthly between
April and September during construction and annually thereafter for 5
years; (4) developing restoration success criteria, based on existing
conditions, to determine whether revegetation efforts are successful; (5)
developing data collection and analysis methods for monitoring that
corresponds with success criteria; (6) monitoring restoration success and
supplemental plantings, as needed, until success criteria are met for two
consecutive growing seasons; (7) conducting pre-construction surveys for
Forest Service sensitive plants within areas of proposed ground disturbance
and consult with the Forest Service if needed to minimize effects on newly
identified populations; and (8) obtaining written approval from the Forest
Service prior to using herbicides or pesticides on NFS lands.
• Develop a scenery management plan to minimize views of project facilities
from the INHT and direct security lighting toward the ground to limit
effects of light pollution.
• Install a gate and construct a parking area with a single-unit vault restroom
on the project access road, east of the Seward Highway and railroad
corridor and west of the access road bridge over Trail Lake Narrows to
support non-winter visitor use of the project access road.
• Develop a public access plan to describe locations and identify entities
responsible for installing and maintaining infrastructure such as gate(s),
parking area, restroom, and signs to manage public access in the vicinity of
the project access road between Seward Highway and Grant Lake.
• Revise the HPMP in consultation with the Alaska SHPO, Forest Service,
and other consulting parties to include: (1) the identification of the specific
Native organizations that will be consulted and how they will be involved;
xxvi
(2) the addition of Mark Luttrell as a consulting party; (3) a discussion of
the methods for conducting the traditional cultural properties study, which
Native organizations were consulted, results of such consultation, and
conditions under which Native organizations would continue to be
consulted in the future; (4) clarification regarding the survey status of the
section of the proposed transmission line extending west from where it
crosses the Seward Highway to its interconnection with the main power
distribution line; (5) a schedule for completion of all HPMP measures; (6) a
historic properties monitoring plan that specifies the circumstances under
which monitoring would occur, who would conduct the monitoring, how
frequently regular monitoring would occur, and how monitoring results
would be disseminated and used; (7) specific factors that would trigger
implementation of more active management/mitigation measures to address
project-related effects on historic properties over periodic monitoring; (8) a
provision to formally evaluate and assess project effects on submerged
cultural resources if they are exposed in the future; and (9) documentation
and copies of all section 106 consultation throughout the licensing process,
including documentation of Alaska State Historic Preservation Officer
concurrence on the project area of potential effects (APE) and concurrence
with all measures contained within the HPMP (including the use of
monitoring and installation of interpretive signs as mitigation measures),
and an appendix that details the extent to which each comment received on
the HPMP is addressed in the revised plan.
Staff Alternative with Mandatory Conditions
We recognize that the Commission is required to include valid section 4(e)
conditions in any license issued for the project. The staff alternative with mandatory
conditions includes the staff-recommended measures noted above along with the
development of an aquatic invasive species management plan (preliminary 4(e) condition
19).
Incorporating these mandatory conditions into a license would not cause us to
modify or eliminate any of the environmental measures included in the staff alternative.
No-action Alternative
Under the no-action alternative, the project would not be constructed.
Environmental Impacts and Measures of the Staff Alternative
The primary issues associated with constructing and operating the project are
effects of project construction, operation, and maintenance on instream flows and water
quality; loss of fish, botanical, and wildlife habitat; effects on aesthetics; and protection
of cultural resources. The environmental effects of the staff alternative are described in
the following section.
xxvii
Geology and Soils
Construction of the project would require land-disturbing activities associated with
building the diversion dam and associated intake and fish screening structure, the pipeline
and penstock, the powerhouse, and the transmission line and its substation. These
activities would include instream excavation, vegetation removal, and other soil
disturbance that would create the potential for erosion and could affect water quality.
Kenai Hydro’s proposed measures to designate an ECM and develop an ESCP would
specify the measures that would be used to limit the adverse effects of erosion on
terrestrial and aquatic habitats. Developing a construction plan and a spoils disposal plan
and conducting turbidity monitoring would provide additional protection for terrestrial
and aquatic habitats by documenting any required measures for protecting birds and
sensitive plants and preventing sediment discharge into watercourses. Providing the
ECM with the authority to stop work would help to limit adverse conditions resulting
from construction activities.
Aquatic Resources
The proposed use of a cofferdam, silt fences, and an in-water construction window
during low-flow periods to protect water quality would minimize the effect of increased
turbidity on aquatic organisms during project construction because these measures would
isolate construction areas from Grant Creek and protect aquatic resources by limiting the
spread of disturbed sediment in the creek. Implementing staff’s recommended water
quality monitoring during project construction would identify whether construction
activities are adversely affecting water quality and facilitate corrective action to be taken
in a timely fashion. Staff’s recommended modifications to the proposed ESCP would
determine the potential for project construction to mobilize lead in lake sediments near
the proposed project intake. If the staff-recommended pre-construction lead sampling
indicates there is potential for lead mobilization in concentrations that would adversely
affect aquatic resources, staff’s recommended sediment capping measures should prevent
mobilization.
Developing a hazardous materials plan that includes measures for the storage of
hazardous materials and measures for spill prevention and containment would further
protect aquatic habitat by preventing hazardous materials from entering waterways.
Combining the two proposed plans into a single plan, as staff recommends, would
facilitate agency review and communication between Kenai Hydro and contractors. Staff
recommendations to: (1) develop the plan in consultation with Alaska DFG, FWS, and
Forest Service; (2) include designation of specific areas for the maintenance and refueling
of vehicles and equipment; (3) include appropriate measures for containment and cleanup
in the event of a spill or accident; (4) include provisions to remove oil and other
contaminants from condensate and leakage from the turbines and other equipment in the
powerhouse; and (5) include a reporting schedule would improve the clarity of the plan
and ensure measures are in place for timely implementation during hazardous spill
emergency situations.
xxviii
Reduced flows in the bypassed reach would reduce sediment transport into the
lower reaches of Grant Creek. The proposed channel maintenance flows would limit the
effects of the project on sediment transport and maintain salmonid spawning and rearing
habitat in Grant Creek. Staff’s recommended salmonid spawning gravel monitoring plan
would monitor sediment supply and any depletion rate within the channel and our
recommended trend analysis would support the development of appropriate measures
(e.g., modifying the intensity or duration of the channel maintenance flows or gravel
augmentation) to address any spawning gravel recruitment issues needed to maintain
existing spawning habitat.
Implementing the proposed minimum flows in the bypassed reach and
downstream of the project tailrace, along with staff’s recommended ramping rates, would
protect aquatic habitat and limit the potential for egg scour or fish stranding during flow
fluctuations associated with project operation. Staff’s recommended continuous
monitoring of temperature in Grant Lake and Grant Creek, coupled with real-time
adjustments in intake depth such that Grant Creek temperatures are within 0.5ºC Grant
Lake at 0.5-meter depth (or Grant Lake +1.0ºC during ice break-up), would maintain the
existing Grant Creek thermal regime, thereby minimizing project effects on salmonid life
history and protecting habitat for salmonids.
Compared to existing conditions, project operation would result in slightly lower
flows in Grant Creek in the spring and summer and slightly higher flows in the late fall
and winter. Although lower spring and summer flows would result in a 10 to 20 percent
reduction in wetted usable area for salmonid spawning and rearing habitat, depending on
life stage, species, and water availability, the project flows would provide a net benefit to
fish habitat because higher winter flows would provide additional rearing habitat for fish
in Grant Creek in side channels that would normally be dry or frozen.
Terrestrial Resources
Project construction would disturb existing vegetation and remove or alter
10.2 acres of vegetated wildlife habitat. Construction activities would also include
disturbance and noise produced by machinery and crews that could affect avian
communities and other wildlife. Designating an ECM to oversee construction activities,
implementing the proposed Vegetation Management Plan with staff-recommended
additions for revegetation monitoring and success criteria, implementing measures to
reduce the risk of introduction or spread of terrestrial and aquatic invasive plants, and
conducting pre-construction surveys for sensitive plants in areas of proposed ground
disturbance would limit the effects of construction and operation on vegetation.
Project operation would result in fluctuations in Grant Lake surface elevations that
could affect nesting habitat for shore-nesting birds. The project’s transmission line
would increase the risk of injury and electrocution to birds that could collide with the
transmission line. Implementation Kenai Hydro’s Avian Protection Plan would limit
project effects on nesting birds by avoiding or minimizing vegetation clearing activities
xxix
during the breeding season, conducting nest surveys prior to vegetation clearing, and
establishing protective buffers around active nests. Staff’s recommended modification of
the plan to include nest surveys prior to any construction activities with potential to
disturb nesting birds, not just before vegetation clearing activities, would further limit
these effects. The proposed Avian Protection Plan also includes measures to ensure that
the transmission line would be designed and constructed with consideration of Avian
Power Line Interaction Committee recommendations to reduce potential for bird
electrocutions and collisions that would minimize the risk of injury and mortality to birds
due to collision, and final engineering plans would be submitted to FWS and Alaska DFG
for comment prior to being filed with the Commission for approval.
Increased human presence associated with project construction and operation
could disturb bears and increase the risk of adverse interactions between bears and
humans. Implementing Kenai Hydro’s proposed bear safety plan would minimize effects
on bears and limit the potential for bear-human encounters by keeping proposed
construction sites and refuse areas clear of food or garbage and installing bear-proof
garbage receptacles. The plan would also include provisions for reporting bear-human
conflicts and dealing with problem bears.
Noise and disturbance produced by helicopters or other aircraft (if necessary) used
during construction of the proposed project could affect mountain goats within and near
proposed project lands. If aircraft are used during construction, impacts would be
minimized by maintaining a 1,500-foot distance between aircraft and mountain goats at
all times, as recommended by FWS and Alaska DFG.
Threatened and Endangered Species
No federally listed species have the potential to occur in the project area;
therefore, constructing and operating the project would not affect listed species.
Recreation
Constructing the project would temporarily restrict public access by displacing the
few anglers who use the stream near the construction site. Constructing the staff-
recommended parking lot and single-unit vault restroom in the staging area on the west
side of the access road bridge over Grant Creek would support non-motorized use of the
project road for visitors to access Grant Lake, address public safety concerns about
pedestrians crossing or walking along the highway and railroad tracks, and reduce
congestion caused by visitors parking cars along the highway. Developing a public
access plan to describe locations and identify entities responsible for installing and
maintaining infrastructure such as gate(s), parking area, restroom, and signs to manage
public access in the vicinity of the project access road between Seward Highway and
Grant Lake would ensure the staff-recommended improvements are properly located and
managed to provide public access and protect environmental resources.
xxx
Land Use and Aesthetics
An analysis of existing land use management goals for the project area indicates
that the proposed project facilities would not conflict with the current level of
development and motorized vehicle use in the area and would be consistent with
allowable land uses on NFS lands adjacent to the proposed project.
The staff-recommended scenery management plan would mitigate project effects
on aesthetic resources by screening project facilities from recreation users and directing
project lighting, so it would be less visible.
Cultural Resources
Project-related effects on cultural resources within the APE could occur from
project construction, operation and maintenance of project facilities and roads, and the
mitigation measures associated with other environmental resources. To meet its section
106 responsibilities, staff intends to execute a Programmatic Agreement with the Alaska
State Historic Preservation Officer for the proposed project for the protection of historic
properties that would be affected by project construction and operation. The terms of the
Programmatic Agreement would require Kenai Hydro to address all historic properties
identified within the project APE through revision of the January 2018 HPMP.
No-action Alternative
Under the no-action alternative, the project would not be constructed.
Conclusions
Based on the analysis, we recommend licensing the project as proposed by Kenai
Hydro with some staff modifications and additional measures.
In section 4.2 of the environmental impact statement, we estimate the likely cost
of alternative power for each of the three alternatives identified above. The analysis
shows that, during the first year of operation under the proposed action alternative,
project power would cost $1,616,890, or $86.93 per MWh more than the likely
alternative cost of power. Under the staff alternative, project power would cost
$1,589,380, or $85.45/MWh more than the likely alternative cost of power. Under the
staff alternative with mandatory conditions, project power would cost $1,608,810, or
$86.50MWh more than the likely alternative cost of power.
We chose the staff alternative as the preferred alternative because: (1) the project
would provide a dependable source of electrical energy for the region (18,600 MWh
annually); (2) the 5 MW of electric capacity comes from a renewable resource that does
not contribute to atmospheric pollution, including greenhouse gases; and (3) the
recommended environmental measures proposed by Kenai Hydro, as modified by staff,
would adequately protect and enhance environmental resources affected by the project.
xxxi
The overall benefits of the staff alternative would be worth the cost of the proposed and
recommended environmental measures.
1-1
FINAL ENVIRONMENTAL IMPACT STATEMENT
Federal Energy Regulatory Commission
Office of Energy Projects
Division of Hydropower Licensing
Washington, D.C.
Grant Lake Hydroelectric Project
FERC Project No. 13212-005—Alaska
1.0 INTRODUCTION
1.1 APPLICATION
On April 18, 2016, Kenai Hydro, LLC (Kenai Hydro or applicant), filed its final
application for an original license with the Federal Energy Regulatory Commission
(Commission or FERC) for the proposed Grant Lake Hydroelectric Project (Grant Lake
Project or project). Kenai Hydro amended the application on January 16, 2018.14 On
May 23, 2018, Kenai Hydro filed its response to agency terms and conditions, modifying
its proposed measures by agreeing to some agency recommendations or proposing
alternative measures. On August 6, 2018, after further consultation with agencies, Kenai
Hydro filed a revised schedule for minimum flows downstream of the proposed tailrace.
The proposed 5-megawatt (MW) project would be located on Grant Lake and Grant
Creek, near the community of Moose Pass, Kenai Peninsula Borough, Alaska (figure 1-1)
and would generate about 18,600 megawatt-hours (MWh) of energy annually. The
project would occupy 1,688.7 acres of federal land within the Chugach National Forest,
administered by U.S. Department of Agriculture, Forest Service (Forest Service).
1.2 PURPOSE OF ACTION AND NEED FOR POWER
1.2.1 Purpose of Action
The purpose of the proposed Grant Lake Project is to provide a new source of
hydroelectric power. Therefore, under the provisions of the Federal Power Act (FPA),
the Commission must decide whether to issue a license to Kenai Hydro for the proposed
Grant Lake Project and what conditions should be placed on any license issued. In
14 Kenai Hydro amended its final license application to address requests from the
National Marine Fisheries Service (NMFS) and the U.S. Fish and Wildlife Service (FWS)
to relocate the proposed minimum bypass flow discharge to facilitate downstream
ecological processes.
1-2
Figure 1-1. Proposed location of the Grant Lake Project (Source: Kenai Hydro, 2018a, as modified by staff).
1-3
deciding whether to issue a license for a hydroelectric project, the Commission must
determine that the project will be best adapted to a comprehensive plan for improving or
developing a waterway. In addition to the power and developmental purposes for which
licenses are issued (such as flood control, irrigation, or water supply), the Commission
must give equal consideration to the purposes of: (1) energy conservation; (2) the
protection of, mitigation of damage to, and enhancement of fish and wildlife resources;
(3) the protection of recreational opportunities; and (4) the preservation of other aspects
of environmental quality.
Issuing an original license for the Grant Lake Project would allow Kenai Hydro to
generate electricity at the project for the term of the license, making electrical power
from a renewable resource available to its customers.
This final environmental impact statement (EIS) assesses the effects associated
with operation of the project and alternatives to the proposed project. It also includes
recommendations to the Commission on whether to issue a license and, if so, includes the
recommended terms and conditions to become a part of any license issued.
In this final EIS, we assess the environmental and economic effects of
constructing and operating the project: (1) as proposed by the applicant, and (2) with our
recommended measures. We also consider the effects of the no-action alternative.
Important issues that are addressed include the effects of project construction and
operation on water quality; aquatic resources, including winter-, spring-, and fall-run
Chinook salmon and steelhead; vegetation and wildlife; and cultural resources.
1.2.2 Need for Power
The Grant Lake Project would provide hydroelectric generation to meet part of
Alaska’s power requirements, resource diversity, and capacity needs. The project would
have an installed capacity of 5 MW and generate an average of 18,600 MWh per year.
Kenai Hydro is a subsidiary of the Homer Electric Association, which currently
provides power to the Alaska Railbelt (Railbelt) region 15 from other generating facilities.
The Railbelt electrical grid is defined as the service areas of six regulated public utilities,
extending from Fairbanks to Anchorage and the Kenai Peninsula—Golden Valley
Electric Association; Chugach Electric Association; Matanuska Electric Association,
Homer Electric Association; Anchorage Municipal Light and Power; and the City of
Seward Electric System. Power also comes from Aurora Energy, LLC, an independent,
power-producing utility. Sixty-five percent of the Alaskan population lives within the
Railbelt region (Alaska Energy Wiki, 2018).
15 The Railbelt region includes developments along the Alaska Railroad between
the Kenai Peninsula and Fairbanks. The region includes the Mat-Su Valley, Anchorage,
the Kenai Peninsula, Talkeetna, and Fairbanks.
1-4
The southern portion of the Railbelt region—Mat-Su Valley, Anchorage, and the
Kenai Peninsula—is highly dependent on natural gas as a source of electricity and heat.
The northern portion of the Railbelt region—Fairbanks and other communities in the
interior—relies on petroleum fuels in addition to natural gas, coal, and hydroelectric
power imported from the south.
Nearly all the thermal generating capacity in the Railbelt region is almost 25 years
old, and much of it is more than 35 years old. The majority of the generation is
combustion turbine generation.
We conclude that power from the Grant Lake Project would help meet a need for
power in the Railbelt region in both the short- and long-term. As a renewable resource,
the project may provide power that displaces generation from non-renewable sources.
Displacing the operation of non-renewable facilities may avoid some power plant
emissions, thus creating an environmental benefit.
1.3 STATUTORY AND REGULATORY REQUIREMENTS
A license for the Grant Lake Project would be subject to numerous requirements
under the FPA and other applicable statutes, as summarized below.
1.3.1 Federal Power Act
1.3.1.1 Section 18 Fishway Prescriptions
Section 18 of the FPA states that the Commission is to require construction,
operation, and maintenance by a licensee of such fishways as may be prescribed by the
Secretaries of Commerce or the U.S. Department of the Interior (Interior). The U.S.
Department of Commerce, National Oceanic and Atmospheric Administration, National
Marine Fisheries Service (NMFS), by letter dated April 9, 2018, requests that the
Commission include a reservation of authority to prescribe fishways under section 18 in
any license issued for the project.
1.3.1.2 Section 4(e) Conditions
Section 4(e) of the FPA provides that any license issued by the Commission for a
project within a federal reservation will be subject to and contain such conditions as the
Secretary of the responsible federal land management agency deems necessary for the
adequate protection and use of the reservation. The Forest Service filed final conditions
on March 1, 2019 (appendix B), pursuant to section 4(e) of the FPA. These conditions
are described under section 2.2.5, Modifications to Applicant’s Proposal—Mandatory
Conditions.
1.3.1.3 Section 10(j) Recommendations
Under section 10(j) of the FPA, each hydroelectric license issued by the
Commission must include conditions based on recommendations provided by federal and
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state fish and wildlife agencies for the protection, mitigation, or enhancement of fish and
wildlife resources affected by the project. The Commission is required to include these
conditions unless it determines that they are inconsistent with the purposes and
requirements of the FPA or other applicable law. Before rejecting or modifying an
agency recommendation, the Commission is required to attempt to resolve any such
inconsistency with the agency, giving due weight to the recommendations, expertise, and
statutory responsibilities of such agency.
The Alaska Department of Fish and Game (Alaska DFG) and NMFS timely filed,
on January 8, 2019, and March 1, 2019, respectively, final recommendations under
section 10(j). These recommendations are summarized in table 5-1. In section 5.3.1,
Fish and Wildlife Agency Recommendations, we also discuss how we address the agency
recommendations and comply with section 10(j).
1.3.2 Clean Water Act
Under section 401 of the Clean Water Act, a license applicant must obtain
certification from the appropriate state pollution control agency verifying compliance
with the Clean Water Act. By letter dated February 22, 2016, the Alaska Department of
Environmental Conservation (Alaska DEC) waived its right to issue a water quality
certification for licensing the Grant Lake Project, in accordance with section 401 of the
Clean Water Act. Kenai Hydro filed a copy of the letter with the Commission on
September 5, 2017.
1.3.3 Endangered Species Act
Section 7 of the Endangered Species Act requires federal agencies to ensure that
their actions are not likely to jeopardize the continued existence of endangered or
threatened species or result in the destruction or adverse modification of the critical
habitat of such species. No federally listed threatened, endangered, proposed, or
candidate species and no proposed or designated critical habitats are known to occur in
the vicinity of the project (letter from U.S. Department of the Interior, Fish and Wildlife
Service (FWS), Anchorage Fish and Wildlife Field office, filed February 8, 2019). No
federally listed species under NMFS management occur in the project area (NOAA,
2019a). Therefore, licensing the project would not affect listed species, and no further
consultation under section 7 is required.
1.3.4 Coastal Zone Management Act
Under section 307(c)(3)(A) of the Coastal Zone Management Act (CZMA),
16 United States Code (U.S.C.) § 1456(3)(A), the Commission cannot issue a license for
a project within or affecting a state’s coastal zone unless the state CZMA agency concurs
with the license applicant’s certification of consistency with the state’s CZMA program,
or the agency’s concurrence is conclusively presumed by its failure to act within 180 days
of its receipt of the applicant’s certification.
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On July 7, 2011, by operation of state law, the federally approved Alaska Coastal
Zone Management Plan expired, resulting in a withdrawal from participation in the
CZMA’s National Coastal Management Program. The CZMA federal consistency
provision, section 307, no longer applies in Alaska.
1.3.5 National Historic Preservation Act
Section 106 of the National Historic Preservation Act (NHPA) requires that every
federal agency “take into account” how each of its undertakings could affect historic
properties. Historic properties are districts, sites, buildings, structures, traditional cultural
properties (TCPs), and objects significant in American history, architecture, engineering,
and culture that are eligible for inclusion in the National Register of Historic Places
(National Register).
To meet the requirements of section 106, the Commission intends to execute a
Programmatic Agreement for the protection of historic properties from the effects of the
operation of the Grant Lake Project. The terms of the Programmatic Agreement ensure
that Kenai Hydro addresses and treats all historic properties identified within the project’s
area of potential effects (APE) through revision of the Historic Properties Management
Plan (HPMP) filed on January 16, 2018.
1.3.6 Magnuson-Stevens Fishery Conservation and Management Act
The Magnuson-Stevens Fishery Conservation and Management Act requires
federal agencies to consult with NMFS on all actions that may adversely affect Essential
Fish Habitat (EFH). Grant Lake Project is identified as EFH for Chinook, coho, pink,
and sockeye salmon.
The analysis of project effects on these species’ EFH is presented in
section 3.3.2.3, Essential Fish Habitat. We conclude that licensing the project as
proposed with staff-recommended measures and mandatory conditions would have
minor, adverse effects on Chinook, coho, pink, and sockeye salmon habitat and on
migrating adult and juvenile salmonids due to temporary increases in turbidity and
suspended sediment during in-water construction activities and reduced spring and
summer flows. However, the mitigation measures, including providing minimum flows
to increase access to side channels in winter, providing channel maintenance flows at
least twice during every 10-year period, limiting downramping rates to between 1 and
2.25 inches per hour, depending on season, and maintaining existing water temperature
fluctuations would not affect EFH in project waters. We are providing NMFS with our
EFH assessment and request that NMFS provide any EFH conservation
recommendations.
1.3.7 National Trails System Act
The National Trails System is the network of scenic, historic, and recreational
trails created by the National Trails System Act of 1968 (16 U.S.C. §§ 1241-1251).
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These trails provide outdoor recreation; promote the enjoyment, appreciation, and
preservation of open-air, outdoor areas and historic resources; and encourage public
access and citizen involvement.
The Forest Service plans to construct a segment of the Iditarod National Historic
Trail (INHT) near the project. Based on the analysis presented in section 3.3.4.2, in the
Iditarod National Historic Trail subsection, we conclude that the proposed project would
not be inconsistent with the planned trail and the National Trails System Act.
1.4 PUBLIC REVIEW AND COMMENT
The Commission’s regulations (18 Code of Federal Regulations [CFR], sections
5.1–5.16) require that applicants consult with appropriate resource agencies, tribes, and
other entities before filing an application for a license. This consultation is the first step
in complying with the Fish and Wildlife Coordination Act, the ESA, the NHPA, and
other federal statutes. Pre-filing consultation must be complete and documented
according to the Commission’s regulations.
1.4.1 Scoping
Before preparing this EIS, we conducted scoping to determine what issues and
alternatives should be addressed. A scoping document (SD1) was distributed to
interested agencies and others on May 11, 2010. It was noticed in the Federal Register
on May 18, 2010. Commission staff conducted an environmental site review of the
project area on June 2, 2010. Two scoping meetings, both advertised in in the local
newspapers, were held on June 2 and June 3, 2010, in Moose Pass, Alaska, to request oral
comments on the project. A court reporter recorded all comments and statements made at
the scoping meetings, and these are part of the Commission’s public record for the
project. In addition to comments provided at the scoping meetings, the following entities
provided written comments:
Commenting Entity Date Filed
Seward Iditarod Trail Blazers June 5, 2010
John Polonowski June 15, 2010
William Brennan June 23, 2010
Kenai River Watershed Foundation June 25, 2010; July 6,
2010; July 19, 2010
Becky Long June 25, 2010
Michael Cooney July 6, 2010
Alaska Center for the Environment July 6, 2010
Shawn Lynch July 6, 2010
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Commenting Entity Date Filed
Resurrection Bay Conservation Alliance July 6, 2010, July 7,
2010 16
NMFS July 6, 2010
Alaska Department of Natural Resources (Alaska
DNR), Division of Mining, Land & Water
July 6, 2010
FWS July 6, 2010
National Park Service (Park Service) July 6, 2010
Alaska DFG July 6, 2010
Kenai Hydro July 7, 2010
Forest Service July 9, 2010
U.S. Army Corps of Engineers August 3, 2010
A revised scoping document (SD2), addressing these comments, was issued on
August 23, 2010. On April 18, 2016, Kenai Hydro filed its final license application for
the proposed Grant Lake Project. Upon review of the final license application,
Commission staff found that the proposed project differed substantially from Kenia
Hydro’s original proposal described in the Preliminary Application Document. As a
result, the Commission re-initiated its National Environmental Policy Act scoping
process with the issuance of Scoping Document 3 (SD3) on July 22, 2016. SD3 was
noticed in the Federal Register on July 28, 2016. Two scoping meetings, both advertised
in local newspapers, were held on September 7 and 8, 2016, in Moose Pass, Alaska, to
request oral comments on the project. A court reporter recorded all comments and
statements made at the scoping meetings, and this information is part of the
Commission’s public record for the project. In addition to comments provided at the
scoping meetings, the following entities provided written comments on SD3:
Commenting Entity Date Filed
Alaska DFG October 7, 2016
Kenai River Watershed Foundation October 11, 2016
Mark Luttrell October 11, 2016
16 Public comments in response to a resolution regarding the development of the
Grant Lake/Falls Creek Hydropower Project and considered by the Kenai Peninsula
Borough Assembly, during its June 21, 2010, council meeting, were submitted as part of
the public record for this proceeding.
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Commenting Entity Date Filed
Park Service October 11, 2016
NMFS October 11, 2016
FWS October 17, 2016
The Commission issued a revised scoping document (SD4), addressing these
comments on December 7, 2016.
1.4.2 Interventions
On July 19, 2016, the Commission issued a notice that Kenai Hydro had filed an
application for an original license for the Grant Lake Project. This notice set September
17, 2016, as the deadline for filing protests and motions to intervene. In response to the
notice, the following entities filed motions to intervene:
Intervenor Date Filed
Mark Luttrell September 12, 2016
Forest Service September 15, 2016
Kenai River Watershed Foundationa September 16, 2016
Friends of Copper Landinga September 16, 2016
Bureau of Land Management September 16, 2016
Bruce Jaffa September 16, 2016
Iditarod Historic Trail Alliancea September 16, 2016
Seward Iditarod Trail Blazers September 16, 2016
Irene Lindquistb October 6, 2016
Herrick Sullivanb April 3, 2018
Interiorb April 6, 2018
NMFSb April 9, 2018
a Intervention in opposition
b Late intervention approved by Commission notice issued on April 27, 2018.
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1.4.3 Comments on the Application
A notice requesting comments, preliminary terms and conditions, and
recommendations was issued on February 8, 2018. The following entities commented:
Commenting Agency and Other Entity Date Filed
Herrick Sullivan April 3, 2018
Alaska DFG April 6, 2018
Homer Electric Association, Board of Directors April 9, 2018
David Lisi April 9, 2018
Forest Service April 9, 2018
Cook Inletkeeper April 9, 2018
Interior April 9, 2018
NMFS April 9, 2018
Jonathan Sewall (Iditarod Historic Trail
Alliance)
April 9, 2018
Interior (errata for 10(j) recommendation 2) May 2, 2018
Alaska DFG (modification to 10(j)
recommendation 2)
August 24, 2018
Forest Service (modification to preliminary 4(e)
condition 21)
August 27, 2018
The applicant filed reply comments on May 23, 2018.
1.4.4 Comments on the Draft Environmental Impact Statement
The draft EIS was sent to the U.S. Environmental Protection Agency (EPA) and
made available to the public on October 19, 2018. Written comments on the draft EIS
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were due March 1, 2019.17 In addition, oral testimony on the draft EIS was received
during two public meetings held in Moose Pass, Alaska, on November 28, 2018.18
Appendix A lists the commenters who provided written comments, summarizes the
substantive comments that were filed, includes staff responses to those comments, and
indicates locations in the final EIS that were revised, as appropriate. Kenai Hydro filed a
response to comments on the draft EIS on March 11, 2019.
17 The notice established December 10, 2018, as the due date for filing comments
on the draft EIS; however, in response to the November 30, 2018, Alaska DFG and the
December 6, 2018, NMFS requests for an extension of time to file comments on the draft
EIS, on December 6, 2018, the Commission extended the comment period to January 9,
2019. Subsequently, due to the funding lapse at certain federal agencies between
December 22, 2018, and January 25, 2019, on February 11, 2019, the Commission
extended the comment period to March 1, 2019
18 The transcripts from the meetings were filed in the administrative record for the
project on January 9, 2019.
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2.0 PROPOSED ACTION AND ALTERNATIVES
2.1 NO-ACTION ALTERNATIVE
The no-action alternative is license denial. Under the no-action alternative, the
project would not be built, and the environmental resources in the project area would not
be affected.
2.2 APPLICANT’S PROPOSAL
2.2.1 Project Facilities
Grant Lake Intake
The proposed Grant Creek Project intake would consist of a reinforced concrete
structure located about 500 feet east of the natural outlet of Grant Lake and adjacent to
the south shore (figures 2-1 and 2-2). The intake structure would consist of a reinforced
concrete structure and extend from elevation 668 feet19 to a top deck elevation of 715
feet. The structure, which would have an outside dimension of 38 feet by 20 feet, would
have intake trashracks, selective withdrawal intake gates with a wire rope hoist, and an
11-foot-high by 11-foot-wide roller gate. The intake would be divided into three bays,
and pressure transducers would be installed to monitor the Grant Lake water level and
within the intake tower. A 16-foot-wide access bridge would provide access to the intake
structure from the lake’s shoreline.
The intake structure would also house a pump to supply minimum flows to the
bypassed reach as discussed below.
Grant Lake Bypass
The proposed bypass system would consist of a concrete weir with a crest
elevation of 703 feet and an automated slide gate and a pump at the intake to provide up
to 10 cubic feet per second (cfs) of flow to the bypassed reaches of Grant Creek (Reaches
5 and 6, as shown on figure 2-1). The concrete weir would be about 100 feet long,
spanning from the north shore to the south shore and connecting in the middle at an
existing island (see figure 2-2). A 16-inch-diameter, 400-foot-long bypass flow pipe
would extend from the intake to the upper end of Reach 6, just downstream of the weir.
19 All elevations in this EIS are in North American Vertical Datum 88.
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Figure 2-1. Proposed Grant Lake Project facilities (Source: Kenai Hydro, 2018a, as modified by staff).
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Figure 2-2. Enlargement of proposed Grant Lake Project intake, bypass pipe, and weir (Source: Kenai Hydro, 2018a, as
modified by staff).
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Tunnel and Surge Chamber
A 3,300-foot-long, 10-foot-diameter, horseshoe-shape tunnel would connect the
project’s intake structure in the lake to a 6-foot-diameter, steel penstock about 150 feet
from the powerhouse. The upper 2,400 feet of the tunnel would be constructed at a
1 percent slope and would be unlined. The lower 900 feet of tunnel would be constructed
at a 15 percent slope and would be concrete lined. A surge chamber would be located at
the transition between the two tunnel slopes. This chamber would be about 10 feet in
diameter and would extend from the tunnel invert elevation of 675 feet to the ground
surface at about elevation 790 feet. The surge chamber outlet would be fully screened to
exclude wildlife and the public from accessing the chamber.
Penstock
A 72-inch-diameter steel penstock would extend 150 feet from the downstream
tunnel portal to the powerhouse. The welded steel penstock would be supported on
concrete pipe saddles along the penstock route. The first 100 feet of the 72-inch-diameter
penstock would be buried with earth to a minimum depth of 2 feet on the top and sloping
outward from the penstock to the existing grade. The penstock would bifurcate into two
48-inch-diameter penstocks outside the powerhouse to provide water flow to each of the
powerhouse turbines. The last 50 feet of the 72-inch-diameter penstock and the 48-inch-
diameter penstock would be encased in concrete. The penstock would tie into a
powerhouse located on the south bank of Grant Creek near the mouth of the Grant Creek
Canyon (Reach 5). The penstock would enter the south side, and the tailrace channel
would exit on the north side of the powerhouse.
Powerhouse
The 100-foot-long by 50-foot-wide powerhouse would contain two horizontal
Francis type turbine/generator units with a turbine runner at elevation 526 feet and a total
rated capacity of 5,000-kilowatt. The powerhouse flow would range from a maximum of
385 cfs to a minimum of 58 cfs, and the flow from each turbine would range from
192.5 cfs to 58 cfs and discharge to the project’s tailrace. An energy dissipation valve
would extend off the penstock and to bypass flow around the turbines and discharge
directly to the project tailrace in the event of an emergency project shutdown.
Tailrace
The trapezoidal tailrace channel would be 105 feet wide and have a bottom width
of 74 feet and a channel depth ranging from 13 feet at the powerhouse to 8 feet at the
edge of Grant Creek. It would be located between the north side of the powerhouse and
the south bank of Grant Creek. The channel in Grant Creek at the outflow of the tailrace
would be excavated and lined with riprap. At the entrance of the tailrace, a flume
structure with discharge gates would be constructed to allow water to flow from the
turbines to the tailrace when the gates are open, but when the gates are closed, it would
allow flow to pass from the turbines to a detention pond through a 240-foot-long concrete
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conduit. The detention pond is discussed in detail below. The tailrace channel would be
equipped with a fish barrier at the mouth of Grant Creek, and an 8-foot-tall wildlife
exclusion fence would be located at the top of the bank on both sides of the channel and
across the top of the fish barrier to exclude wildlife from the tailrace channel.
Detention Pond
Kenai Hydro proposes to construct a 3.6-acre detention pond with a storage
capacity of 15 acre-feet and would locate it near the powerhouse. Kenai Hydro
anticipates that, at times, generation would be required instantaneously for very short
periods (15 to 20 minutes) and discharge to Grant Creek would adversely affect water
levels in the creek.
Transmission Line and Switchyard
An overhead 1.1-mile-long, 115-kilovolt (kV) transmission line would extend
from the powerhouse and run parallel to the proposed access road to Chugach Electric’s
existing 115-kV transmission line located on the west side of the Seward Highway (see
figure 2-1). The transmission line would be constructed using wooden poles set at about
250-foot intervals.
Access Roads
The project would include a 1-mile-long, 24-foot-wide powerhouse access road
from the Seward Highway as milepost 26.9 to the powerhouse located near the base of
the Grant Creek Canyon and a 16-foot-wide, 1.1-mile-long intake access road from the
powerhouse to the intake at Grant Lake. The proposed access roads would be used
during project construction and after construction is completed for facility maintenance.
The powerhouse access road, which would be surfaced with crushed stone, would travel
eastward from the Seward Highway across the Alaska Railroad Corporation (ARRC)
tracks and across the downstream end of Trail Lake Narrows.20 The road would then
continue eastward to the powerhouse (see figure 2-1). The crossing of Trail Lake
Narrows would be via a 110-foot-long, single-lane bridge.
The 1.1 mile-long intake access road would begin at the powerhouse and ascend a
230-foot bluff to the top of the southern rim of the Grant Creek Canyon. A series of road
switchbacks would be required to maintain a road grade of less than 8 percent and
periodic turnouts would be constructed to allow traffic to pass. The road would be
surfaced with crushed stone. The road would then generally follow the southern edge of
the canyon until it descends to the edge of Grant Lake. A 16-foot-wide, 60-foot-long
access bridge would extend from the edge of the lake to the intake structure. A small
20 Trail Lake Narrows is the narrow channel between Upper Trail Lake and Lower
Trail Lake.
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parking area and turn-around area would be constructed upstream of the intake structure
access bridge.
2.2.2 Project Safety
As part of the licensing process, the Commission would review the adequacy of
the proposed project facilities. Special articles would be included in any license issued,
as appropriate. Commission staff would inspect the licensed project both during and after
construction. Inspection during construction would concentrate on Kenai Hydro’s
adherence to Commission-approved plans and specifications, special license articles
relating to construction, and accepted engineering practices and procedures. Operational
inspections would focus on the continued safety of the facilities, identification of
unauthorized modifications, efficiency and safety of operation, compliance with the terms
of the license, and proper maintenance. In addition, any license issued would require an
inspection and evaluation every 5 years by an independent consultant and submittal of the
consultant’s safety report for Commission review.
2.2.3 Project Operation
The project would use inflow to and storage in Grant Lake to generate power and
meet minimum flow requirements within Grant Creek. Under the applicant’s proposed
operation, Grant Lake’s elevation would vary from the current normal maximum
elevation of 703 feet, which is the elevation of the natural Grant Lake outlet, down to a
minimum lake elevation of 690 feet (see figure 3-6 in section 3.3.2.2, Aquatic Resources,
Environmental Effects). To provide storage for spring flows, Kenai Hydro would draw
down the lake during the winter months and use these reservoir releases to generate
power and meet instream flows requirements in Grant Creek. Kenai Hydro also proposes
to increase power benefits by taking advantage of spinning reserve and load-following
operations (peaking).
The powerhouse would operate with a minimum hydraulic capacity of 58 cfs (one
unit) and a maximum hydraulic capacity of 385 cfs (total for two units). When the lake is
at a sufficient elevation, Kenai Hydro would provide minimum flows into the bypassed
reach through a slide gate in the bypass weir. When the lake elevation is too low to
provide a sufficient flow volume to meet the minimum bypass flows through the slide
gate, Kenai Hydro would close the slide gate. A vertical turbine pump station would then
pump water from the penstock intake structure through a bypass pipe to the downstream
side of the bypass weir at the head of the Grant Creek bypassed reach.21 When the lake
level exceeds 703 feet, and inflow is greater than 385 cfs the excess flow would pass over
21 The weir would prevent flows pumped from the intake from flowing back into
Grant Lake.
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the top of the bypass weir and into Grant Creek’s natural outlet.22 The pump-and-weir
combination would allow the minimum flows ranging from 5 to 10 cfs to be released at
the top of Reach 6. Under this proposed operation, no reach of the creek would be
dewatered. Water would be provided to maintain anadromous and resident passage in
Reach 5 and provide persistent wetted habitat for any macroinvertebrate populations in
Reach 6. The minimum flows would flow down through Reaches 6 and 5 (the bypassed
reach) to Reach 4, where the powerhouse tailrace channel would discharge into Grant
Creek. The combined flows would travel downstream through Reaches 3, 2, and 1 to
Trail Lake Narrows.
Kenai Hydro proposes to use the project for spinning reserve. Spinning reserve is
the ability to provide immediate power to the electric grid in the event of a sudden loss of
power somewhere on the grid, such as when a generating unit trips off-line.
Hydroelectric facilities, such as Grant Creek, would have this capability, because of the
storage capacity in Grant Lake. A generating unit would be brought online at whatever
capacity is required, up to its full hydraulic and generating capacity—in the case of Grant
Creek, 192.5 cfs and 2.5 MW.
Kenai Hydro would construct an off-stream detention pond near the powerhouse.
The detention pond would provide a temporary storage reservoir for flows generated
during the spinning reserve operations to prevent a sudden increase in the water surface
levels of Grant Creek as a result of the increased flows generated.
Spinning reserve capacity for the Grant Lake Project would be primarily available
during the winter and “shoulder months” when the lake inflows were low and the
corresponding powerhouse output would not be at full capacity. If the transmission grid
required an immediate power input from spinning reserve, the powerhouse would ramp
up to full output with the increased flow routed to the detention pond to capture the
increased discharge. The flow diversion would be accomplished with a gated diversion
structure in the powerhouse tailrace.
If a turbine were to be brought online for spinning reserve, the turbine would
operate for a period of minutes or hours to meet the instantaneous demand. Typically, it
would be for a short period until the system demand was met by other generating
facilities on the electric grid. The rate of flow through the unit would dictate how long
the unit could operate in this mode. For example, at a discharge of 20 cfs, it would take
approximately 12 hours to completely fill the detention pond from empty, but at a flow of
22 Kenai Hydro’s amended final license application states that under project
operations, Grant Lake would fluctuate between elevations 703 feet and 690
feet. However, Kenai Hydro also states that when the lake is full, inflow greater than
385 cfs would spill over the crest of the weir. Subsequently, it is not clear how the
proposed weir, with crest elevation of 703 feet, would affect lake elevation during rare
periods when the lake is full and inflow is above 385 cfs.
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192.5 cfs, it would only take 1.2 hours. It is not clear whether both units could provide
spinning reserve, either separately or combined, but it is our interpretation of the project
drawings and discussions in the license application, that perhaps only one unit would be
used for this purpose. It is also not clear whether one unit could discharge to the
detention pond providing spinning reserve while the other unit was discharging to the
tailrace, although our review of the project drawings seems to indicate this would be
possible.
Once the spinning reserve demand is met, Kenai hydro would shut down the unit
and slowly release the detention pond flow back into the powerhouse tailrace. Kenai
Hydro would release the captured flow slowly or at a regulated, adjustable rate into the
tailrace to minimize effects on tailwater elevations. The release rate could be adjusted up
and down by a weir gate to match the given project conditions at that time. Depending
on the release rate selected, the detention pond would simply take longer to drain,
limiting spinning reserve during that period. Kenai Hydro would moderate detention
pond releases in the tailrace and flows through the powerhouse to ensure that combined
releases from the powerhouse and the detention pond adhere to, and do not exceed, the
ramping rates established for project operation.
Kenai Hydro also proposes to occasionally use the project for peaking generation,
resulting in the project providing generation during the peak demand period of the day.
Our understanding of the proposed peaking operation is that Kenai Hydro would typically
undergo peak generation during the winter if demand warrants. In the spring, Kenai
Hydro would operate the project in essentially a run-of-river mode up to the hydraulic
capacity of the project (385 cfs) and store all inflows above 385 cfs until the reservoir is
full.
2.2.4 Environmental Measures
Kenai Hydro proposes the following environmental measures:
Project Construction
• Designate a third-party environmental compliance monitor (ECM) to
oversee construction activities and ensure compliance with measures to
protect natural resources.
• Develop an ESCP that includes best management practices (BMPs) to
prevent sediment mobilized during construction from entering Grant Creek
or Grant Lake.
• Restore areas disturbed by construction to pre-existing conditions.
• Develop a hazardous materials containment/fuel storage plan that includes
measures to contain all hazardous materials used during construction.
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• Consult with Alaska DFG, NMFS, and FWS to finalize design details for
fish exclusion measures in the tailrace.
• Consult with Alaska DFG’s habitat biologist to establish timing windows
for instream construction and stream-crossing activities.
• Develop a bear safety plan that includes: (1) keeping construction sites and
refuse areas clear of substances that attract bears, (2) installing bear-proof
garbage receptacles and other measures during construction to prevent
bears from obtaining food or garbage, (3) minimizing possible conflict with
bears during construction and operation, (4) establishing protocols for
dealing with problem bears,23 and (5) notifying authorities of any bear-
human conflict.
Project Operation
• Provide the following minimum flows in the bypassed reach: 5 cfs from
January 1 through July 31, 10 cfs from August 1 through September 31, 7
cfs from October 1 through October 31, and 6 cfs from November 1
through December 31 to protect aquatic habitat and support benthic
macroinvertebrates.
• Provide the following instantaneous minimum flows downstream of the
tailrace: 60 cfs from January 1 through May 15, 80 cfs from May 16
through May 31, 150 cfs from June 1 through June 30, 195 cfs from July 1
through September 1, 150 cfs from September 1 through September 30, 125
cfs from October 1 through October 15, 72 cfs from October 16 through
November 15, and 60 cfs from November 16 through December 31 to
protect habitat for salmonids and benthic macroinvertebrates.
• Use variable depth withdrawals from the project intake to control water
temperature in Grant Creek.
• Provide channel maintenance flows of 800 cfs to the Grant Creek bypassed
reach for a continuous 8-hour duration, once per year, in a minimum of 2
years in each moving 10-year period to promote sediment recruitment and
transport from the bypassed reach to Grant Creek.
• Limit upramping rates to 1 inch per hour during the winter (November 16
through May 15) and 2 inches per hour during the summer (May 16
through November 15). Limit downramping rates to 1 inch per hour from
23 Although Kenai Hydro and the agencies do not specifically define problem
bears, we understand this term to refer to bears that repeatedly visit a construction area
despite implementation of other measures in the plan, including trash management and
use of bear-proof containers.
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November 16 through May 15 and 2.25 inches per hour from May 16
through November 15.
• Implement the Operation Compliance Monitoring Plan (filed on January
16, 2018) that includes: (1) lake level and temperature monitoring in Grant
Lake; (2) flow and temperature monitoring in Grant Creek bypassed reach;
(3) flow and temperature monitoring in Grant Creek tailrace; (4) failsafe
provisions; (5) a schedule for installing, maintaining, and collecting flow
and temperature instrumentation; and (6) reporting.
• Develop a spill prevention, control, and containment plan and a hazardous
materials containment/fuel storage plan to prevent hazardous materials
from entering Grant Creek or Grant Lake during construction and
operations.
• Implement the Biotic Monitoring Plan (filed on January 16, 2018) that
includes monitoring juvenile and adult salmonid abundance and habitat use,
and monitoring gravel transport in Grant Creek to assess project effects on
salmonid spawning habitat.
• Conduct biological monitoring in Grant Creek to determine the need for
gravel augmentation as well as the effectiveness of the proposed
enhancement/mitigation measures that includes flows in the bypassed reach
and flows downstream of the tailrace, and to evaluate the need for removal
of a log jam to increase flow in a Grant Creek side channel, and an
assessment of the need for gravel augmentation.
• Implement the Vegetation Management Plan (filed on January 16, 2018)
that includes: (1) invasive plant management and control, (2) revegetation,
(3) vegetation maintenance, (4) sensitive plant species protection and
monitoring, and (5) pale poppy population management.
• Implement the Avian Protection Plan (filed on January 16, 2018) that
addresses migratory species and bald eagles and minimizes potential for
electrocutions or collisions with the project transmission line.
• Develop an INHT re-route plan that includes constructing the southern half
of the proposed INHT re-route from the existing route to Grant Creek.
• Restrict public access to the project using signage and gating/fencing of the
access road to address local residents’ concerns about encouraging
motorized use near the project and reduce the potential for unauthorized
motorized use and on adjacent National Forest System lands (NFS lands).
• Develop a fire prevention plan.
• Implement the HPMP (filed on January 16, 2018) to protect historic
properties in the project area.
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2.2.5 Modifications to Applicant’s Proposal—Mandatory Conditions
The following mandatory conditions have been provided and are evaluated as part
of the applicant’s proposal.
Section 4(e) Land Management Conditions
The following final mandatory conditions have been provided by the Forest
Service under section 4(e) and are included in appendix A. We consider final conditions
1 through 3, 5 through 13, and 15 through 18 and 22 to be either administrative, unrelated
to the proposed action, or speculative and uncertain as to whether or not the condition
would ever be implemented; therefore, they are not analyzed in detail in this EIS.24 The
following conditions are resource-specific and are analyzed in this EIS.
• Condition 4: Hold an annual consultation meeting to discuss measures
needed for the protection and use of NFS lands and resources affected by
the project.
• Condition 14: Restrict the use of pesticides 25 on public lands managed by
the Forest Service for NFS lands without the prior written approval of the
Forest Service.
24 For example, Forest Service final 4(e) condition 22 describes measures to be
implemented if, at any point during design, construction, and operation of the
hydroelectric facility it becomes necessary to reroute any portion of the Iditarod National
Historic Trail to accommodate the facility. We consider this measure to be speculative,
because it depends upon an uncertain and unspecified future event that results in the need
for a reroute of the trail. Forest Service Final 4(e) condition 19 includes development of
a reservoir management and inundation plan to identify seasonal reservoir fluctuations
and NFS lands potentially inundated because of anticipated fluctuations. We consider
this plan to be unrelated to the proposed action, because under the proposed project
operations alternatives assessed in this EIS Grant Lake’s maximum water surface
elevation will mirror historic conditions and therefore the project would not cause the
inundation of any additional NSF lands. Forest Service final 4(e) condition 1 requires the
applicant to conduct the administrative action of obtaining a special use authorization for
the use of NFS lands.
25 Pesticides are any substance or mixture of substances intended to prevent,
destroy, repel, or mitigate for any pest or used as a plant regulator, defoliant, or desiccant.
The term pesticide includes many types, broadly classified by the type of pest they
control for (e.g., herbicides are intended to kill plants) (Forest Service, 2013a).
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• Condition 19: Develop the following plans addressing specific resource
issues covered by the Chugach National Forest Land and Resource
Management Plan: construction plan, ESCP, fire prevention plan,
hazardous materials plan, heritage resource protection plan, reservoir
management and inundation plan, scenery management plan, solid waste
and wastewater plan, spoil disposal plan, aquatic invasive species
management plan, and vegetation management plan.26
• Condition 20: Provide an ECM to oversee the project during major
construction activities and ensure that the ECM has stop work or change
order authority.
• Condition 21: Consult with Forest Service during the design and
construction of project facilities crossing the INHT to minimize adverse
effects on the INHT 100-foot wide easement.
2.3 STAFF ALTERNATIVE
Under the staff alternative, the project would include most of Kenai Hydro’s
proposed measures, with the following exceptions. We do not recommend the proposed
Biotic Monitoring Plan because the proposed fishery monitoring efforts do not provide
direct benefits to the fishery, and it is not clear how the proposed fish monitoring would
inform project-related matters given that it is not designed to isolate project effects from
other non-project-related variables that could affect fish populations. In addition, the
project record contains sufficient information on which to base license conditions such
that there is no project-related benefit to requiring additional study. We recognize the
proposed Biotic Monitoring Plan also includes a proposal to monitor salmonid spawning
gravel and we address gravel monitoring below. We do not recommend the removal of
the existing logjam in Reach 1 because it provides habitat for aquatic resources. We do
not recommend the INHT re-route plan because the proposed project infrastructure is
compatible with the existing INHT route, and no re-routing is necessary.
The staff alternative also includes the following recommended modifications of
Kenai Hydro’s proposal and additional measures.
26 Forest Service final 4(e) condition 19 includes filing of 11 management plans.
In some cases, the Forest Service plans relate to proposed plans or recommendations
from other agencies. However, the Forest Service does not provide any details about
these plans. Therefore, we do not analyze these plans as specific Forest Service
recommendations; however, we analyze the need for such plans based on our
understanding of what these types of plans would typically include.
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Project Construction
• Modify the proposed measure to designate a third-party ECM to include a
provision for the ECM to have stop work authority.
• Modify the proposed ESCP to include: (1) a description of existing soil,
groundwater, and vegetation conditions; (2) site-specific preventive
measures; (3) identification of areas for storage or deposition of overburden
and implementation of erosion control measures in those areas;
(4) measures to sample for lead in Grant Lake sediments that could be
disturbed by project construction and operation, and if lead is present,
measures to prevent mobilization; and (5) an implementation schedule.
• Develop a construction plan that includes: (1) a detailed construction
schedule; (2) a description of construction methods and BMPs to be
employed and measures to reduce the risk of introduction or spread of
invasive plants; (3) the delineation of construction areas using fencing and
flagging; (4) measures to avoid streams, wetlands, and pond habitats to the
extent possible during construction; (5) provisions for environmental
training of construction staff regarding laws, regulations, and BMPs to
avoid or reduce effects on all native plant and wildlife species including
special-status species and their habitats; and (6) identification of other
resource-specific protection plans that should be considered during
construction activities.
• Develop a spoils disposal plan that includes: (1) means and methods to
dispose of any materials excavated during construction, (2) mapped
locations of any proposed temporary and/or permanent spoil pile locations,
(3) descriptions of the composition of any materials expected to be
excavated on the site, (4) proposed use of excavated materials in the
construction process, (5) any plans to dispose of materials off site, (6)
methods to prevent spoil materials from leaching from spoil piles into
adjacent waterways and wetlands, and (7) identification of other resource-
specific protection plans that should be considered during construction
activities.
• Modify the proposed Avian Protection Plan to include nest surveys prior to
any construction activities that have the potential to disturb nesting birds,
not just before vegetation clearing activities.
• Avoid the use of helicopters or airplanes near the mountainside adjacent to
Grant Lake and Grant Creek, maintain a 1,500-foot clearance between
aircraft and mountain goat habitat, and follow Forest Service no-fly zones
to protect mountain goats.
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Project Operation
• Develop a solid waste and wastewater plan to protect water quality in Grant
Lake and Grant Creek from waste and sewage generated on site.
• Combine the proposed hazardous materials containment/fuel storage plan
and spill prevention control and containment plan into a single hazardous
materials plan that includes the following measures to be implemented
during construction and operation: (1) designation of specific areas to
maintain and refuel vehicles and equipment, (2) measures for containment
and cleanup in the event of a spill or accident, (3) provisions to remove oil
and other contaminants from condensate and leakage from the turbines and
other equipment in the powerhouse, and (4) a reporting schedule.
• Limit downramping rates to a year-round maximum of 1 inch per hour
(when operational control exists).
• Develop an operation compliance monitoring and reporting plan that
includes: (1) real-time water surface elevation monitoring of Grant Lake
and real-time temperature monitoring within Grant Lake near the intake at a
depth of 0.5 meter; (2) real-time flow monitoring in the Grant Creek
bypassed reach; (3) real-time flow and temperature monitoring in Grant
Creek downstream of the tailrace; (4) provisions to minimize effects of
equipment malfunction on Grant Creek water temperature; (5) a schedule
for installing, maintaining, and collecting flow and temperature
instrumentation; and (6) reporting of Grant Lake and Grant Creek water
temperatures and Grant Lake elevations.
• Adjust intake withdrawal depth on a real-time basis based on the real-time
Grant Creek and Grant Lake temperature monitoring to ensure Grant Creek
temperature below the tailrace meets the following: (1) for the 30-day
period when Grant Lake is going through its ice break-up, Grant Creek
temperature be maintained at the temperature recorded in Grant Lake at a
depth pof 0.5 meter + 1.0°C (+/- 0.5°C); (2) once the spring turnover is
complete and Grant Lake is ice-free, Grant Creek temperatures remain
within +/- 0.5°C of Grant Lake temperature measured at a 0.5 meter depth,
and (3) the same +/- 0.5°C criterion be maintained when Grant Lake is ice-
covered.
• Develop and implement a salmonid spawning gravel monitoring plan, that
includes: (1) methods to assess the distribution and abundance of salmonid
spawning gravel; (2) spawning gravel assessments in years 1, 10, 15, 20,
and 30; and (3) a trend analysis in years 20 and 30 to determine the rate of
any spawning gravel reduction and appropriate measures to address any
reduction in spawning gravel recruitment; and (4) reporting schedule to
include reports after each sampling year.
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• Modify the Vegetation Management Plan to also include: (1) locating
equipment inspections and/or wash stations well outside of riparian/aquatic
zones; (2) treating aquatic invasive plants if any are detected in project
waters; (3) monitoring the success of revegetation efforts monthly between
April and September during construction and annually thereafter for 5
years; (4) developing restoration success criteria, based on existing
conditions, to determine whether revegetation efforts are successful; (5)
developing data collection and analysis methods for monitoring that
corresponds with success criteria; (6) monitoring restoration success and
supplemental plantings, as needed, until success criteria are met for two
consecutive growing seasons; (7) conducting pre-construction surveys for
Forest Service sensitive plants within areas of proposed ground disturbance
and consult with the Forest Service if needed to minimize effects on newly
identified populations; and (8) obtaining written approval from the Forest
Service prior to using herbicides or pesticides on NFS lands.
• Develop a scenery management plan to minimize views of project facilities
from the INHT and direct security lighting toward the ground to limit
effects of light pollution.
• Install a gate and construct a parking area with a single-unit vault restroom
on the project access road, east of the Seward Highway and railroad
corridor and west of the access road bridge over Trail Lake Narrows to
support non-winter visitor use of the project access road.
• Develop a public access plan to describe locations and identify entities
responsible for installing and maintaining infrastructure such as gate(s),
parking area, restroom, and signs to manage public access in the vicinity of
the project access road between Seward Highway and Grant Lake.
• Revise the HPMP in consultation with the Alaska State Historic
Preservation Officer (Alaska SHPO), Forest Service, and other consulting
parties to include: (1) the identification of the specific Native organizations
that will be consulted and how they will be involved; (2) the addition of
Mark Luttrell as a consulting party; (3) a discussion of the methods for
conducting the TCP study, which Native organizations were consulted,
results of such consultation, and conditions under which Native
organizations would continue to be consulted in the future; (4) clarification
regarding the survey status of the section of the proposed transmission line
extending west from where it crosses the Seward Highway to its
interconnection with the main power distribution line; (5) a schedule for
completion of all HPMP measures; (6) a historic properties monitoring plan
that specifies the circumstances under which monitoring would occur, who
would conduct the monitoring, how frequently regular monitoring would
occur, and how monitoring results would be disseminated and used; (7)
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specific factors that would trigger implementation of more active
management/mitigation measures to address project-related effects on
historic properties over periodic monitoring; (8) a provision to formally
evaluate and assess project effects on submerged cultural resources if they
are exposed in the future; and (9) documentation and copies of all section
106 consultation throughout the licensing process, including documentation
of Alaska SHPO concurrence on the project APE and concurrence with all
measures contained within the HPMP (including the use of monitoring and
installation of interpretive signs as mitigation measures), and an appendix
that details the extent to which each comment received on the HPMP is
addressed in the revised plan.
2.4 STAFF ALTERNATIVE WITH MANDATORY CONDITIONS
We recognize that the Commission is required to include valid section 4(e)
conditions in any license issued for the project. Thus, the staff alternative with
mandatory conditions includes staff-recommended measures along with the mandatory
conditions that we did not include in the staff alternative: (1) develop an aquatic habitat
restoration and monitoring plan; (2) develop a fish migration and monitoring plan;
(3) develop a terrestrial and aquatic invasive species management plan; (4) develop a
threatened, endangered, proposed for listing, and sensitive species plan; (5) develop a
wildlife mitigation and monitoring plan; (6) develop a plan for the INHT access and re-
route; and (7) develop a maintenance and operation plan for the re-routed INHT segment
and INHT bridge over Grant Creek.
Incorporation of these mandatory conditions into a license would not cause us to
modify or eliminate any of the environmental measures that we include in the staff
alternative.
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3.0 ENVIRONMENTAL ANALYSIS
In this section, we present: (1) a general description of the project vicinity, (2) an
explanation of the scope of the cumulative effects analysis, and (3) the analysis of the
proposed action and other recommended environmental measures. Sections are
organized by resource area. Under each resource area, historical and current conditions
are first described. The existing condition is the baseline against which the
environmental effects of the proposed action and alternatives are compared, including an
assessment of the effects of proposed mitigation, protection, and enhancement measures,
and any potential cumulative effects of the proposed action and alternatives. Staff
conclusions and recommended measures are discussed in section 5.1, Comprehensive
Development and Recommended Alternative.27
3.1 DESCRIPTION OF THE RIVER BASIN
The proposed project would be located on Grant Creek and Grant Lake, near the
community of Moose Pass, Alaska, in the Kenai Peninsula Borough, about 25 miles north
of Seward, Alaska. The Kenai Mountain Range with elevations ranging from 4,500 to
5,500 feet surrounds Grant Lake to the east, north, and south. Inlet Creek—the
predominant stream in the upper portion of the watershed—drains melting alpine glaciers
and snow from the nearby mountains into Grant Lake on its eastern banks. In addition,
several intermittent, snowmelt-fed streams drain the steep terrain adjacent to Grant Lake.
Grant Creek runs west about 1 mile from the south end of Grant Lake draining into Trail
Lake Narrows between Upper and Lower Trail Lakes. Trail River drains Lower Trail
Lake, and then flows into Kenai Lake. Kenai Lake drains into the Kenai River at its west
end near Cooper Landing. The Grant Lake and Grant Creek Watershed has a total
drainage area of about 44 square miles. Grant Lake is located at an elevation of about
703 feet and has a maximum depth of nearly 300 feet, average depth of 91 feet, and
surface area of 2.6 square miles. Lands surrounding Grant Lake are primarily NFS lands
managed by the Forest Service, Chugach National Forest, with state ownership west of
Grant Lake to the Seward Highway and along Grant Creek. Alaska Department of
Natural Resources (Alaska DNR) manages the state lands. Limited private ownership of
lands (mainly rural residential) occurs in the lower portions of the Grant Creek drainage.
3.2 SCOPE OF CUMULATIVE EFFECTS ANALYSIS
According to the Council on Environmental Quality’s regulations for
implementing the National Environmental Policy Act (40 CFR, section 1508.7), a
cumulative effect is the impact on the environment that results from the incremental
27 Unless otherwise indicated, our information is taken from the amended final
application for license for this project (Kenai Hydro, 2018a) and additional information
filed by Kenai Hydro (Kenai Hydro, 2017a,b,c).
3-2
impact of the action when added to other past, present and reasonably foreseeable future
actions regardless of what agency (federal or non-federal) or person undertakes such
actions. Cumulative impacts can result from individually minor but collectively
significant actions taking place over a period of time, including hydropower and other
land and water development activities.
Based on our review of the amended final license application and agency and
public comments, we identified water quantity, water quality, fishery resources, and
recreation resources as having potential to be cumulatively affected by the proposed
project in combination with other past, present, and reasonably foreseeable future
activities.
The following existing actions or activities in the Kenai River Basin may
contribute to cumulative effects:
• Mining activities in the Grant Creek Watershed;
• Chugach Electric Association’s operation of the Cooper Lake Hydroelectric
Project (FERC No. 2170) on Cooper Creek, a tributary to the Kenai River;
• The Forest Service’s proposed construction of the INHT, which would cross Grant
Creek near the proposed Grant Creek powerhouse.
3.2.1 Geographic Scope
The geographic scope of analysis defines the physical limits or boundaries of the
proposed action’s effects on the resources. Because the proposed action would affect
resources differently, the geographic scope for each resource may vary. We have
identified the Kenai River Basin as our geographic scope of analysis for water quantity,
water quality, fishery resources, and recreation resources.
3.2.2 Temporal Scope
The temporal scope of analysis includes a discussion of the past, present, and
reasonably foreseeable future actions and their effects on water quantity, water quality,
fishery resources, and recreation resources. Based on the term of a license, we will look
30 to 50 years into the future, concentrating on the effects on water quality and fisheries
from reasonably foreseeable future actions. The historical discussion is limited, by
necessity, to the amount of available information. We identified the present resource
conditions based on the amended final license application, agency comments, and
comprehensive plans.
3-3
3.3 PROPOSED ACTION AND ACTION ALTERNATIVES
In this section, we discuss the effect of the project alternatives on environmental
resources. For each resource, we first describe the affected environment, which is the
existing condition and baseline against which we measure effects. We then discuss and
analyze the specific cumulative and site-specific environmental issues.
Only the resources that would be affected, or about which comments have been
received, are addressed in detail in this EIS. Based on this, we have determined that
water quality and quantity, aquatic, terrestrial, threatened and endangered species,
recreation, cultural, aesthetic and socioeconomic resources may be affected by the
proposed action and action alternatives. We present our recommendations in section 5.1,
Comprehensive Development and Recommended Alternative.
3.3.1 Geologic and Soil Resources
3.3.1.1 Affected Environment
Geology
The Grant Lake Watershed is located on the Kenai Peninsula within the Kenai
Mountain Range. Metasedimentary 28 and metavolcanic 29 rocks from the Valdez Group
(Mesozoic Era) dominate the bedrock geology of the Grant Lake Watershed and the
project area. The Valdez Group comprises primaril y greywacke, slate, and sandy slates.
Grant Creek, the outlet from Grant Lake, flows west about 1 mile from the south end of
Grant Lake and into the Trail River between Upper and Lower Trail Lakes. The Trail
Lakes Valley is a long, north-trending valley that extends from the town of Seward
northward to Upper Trail Lake, and the valley has been called the Kenai Lineament.30
The Kenai Lineament may represent one of the fault zones that was extensively eroded
during the glacial period. The lineament is unlikely to be a major active fault but, rather,
a glacial valley whose orientation and location followed the north-northwest trend of the
minor fault set observed in other areas. Minor faults and fracture zones are present in the
area. Two fracture directions are dominant—one set trends northeast and the other north-
28 Metamorphic rock that was first formed through the formation and solidification
of sediment.
29 Metamorphic rock that was first produced by a volcano, either as lava or tephra,
and was then was buried underneath subsequent rock and subjected to high pressures and
temperatures, causing the rock to recrystallize.
30 A lineament is a linear geologic feature on the earth’s surface, such as a fault.
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northwest. Grant Creek follows the most obvious northeast feature, identified as the
Grant Creek Fault.
Unconsolidated surficial deposits are relatively rare in the proposed project area.
Alluvium 31 is found at the head of Grant Lake in the area between Lower Trail Lake and
Kenai Lake within a few of the coves around Upper and Lower Trail Lakes and the small
bogs found in the low, bedrock ridges flanking the Trail Lakes Valley. These deposits
are typically mixtures of silt, sand, and gravel. Minor sand and gravel deposits are also
found at the mouth of Grant Creek and Falls Creek.
Avalanche debris, transported by snow avalanches during the winter and spring,
consists of poorly sorted mixtures of cobbles, gravel, sand, and silt found at the base of
the major avalanche chutes. Avalanche debris is found on the north shore of Grant Lake
where the lake bends to the east. Talus deposits are rare in the proposed project area,
despite the steep slopes.
Historically, portions of the project area have been mined for gold. Four mining
claims are located on NFS lands on the north side of Grant Lake’s lower basin—one
along the shoreline and three located uphill from the shoreline claim.
Soils
The soils on the Kenai Peninsula, including in the proposed project area, are
derived from glacial and other deposits associated with heavily glaciated alpine
mountains. Extensive glacial till deposits are absent in the project area. Minor glacial till
deposits may exist at the base of some of the bogs and lakes and within some of the coves
along Upper and Lower Trail Lakes. Two exploratory borings in an area of alluvial
deposits in the valley on the east side of Upper Trail Lake penetrated 28 feet and 18 feet
of soils ranging from sand and silt near the surface to poorly sorted mixtures of cobbles,
gravel, sand, and silt at depth. The lower material may represent glacial till or outwash,
while the upper material is likely younger stream or lake bed sediment. None of the
material is consolidated.
Recent geotechnical investigations show that soils at the site are generally shallow,
mantling the glacially scoured bedrock. Along the proposed tunnel alignment, soils are
primarily limited to a thin (less than 5 feet) organic silt to sandy silt overlying bedrock.
In low-lying areas along the alignment, these soils may be in excess of 20 feet.
Recent alluvial deposits are present near the location of the proposed powerhouse
and downstream end of the penstock. Based on proximity to the creek and surface
exposures, these soils are likely to consist primarily of gravels and sandy gravels.
Organic-rich, fine-grained interbeds, which may also occur in this area, may be in excess
of 20 feet thick.
31 Alluvium is sand and mud, formed by flowing water and deposited in a river.
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Soft, organic-rich, fine-grained deposits are present in low-lying areas south of the
proposed powerhouse. These areas have formed peat bogs and may be in excess of 20
feet thick. The currently proposed access road alignments contour around this area.
Mass movements or slope failures, including landslides, rockfalls, avalanches, and
slab failure, are possibly the result of seismic activity. The rock cliffs along Upper Trail
Lake from the east could be a source of small rockfalls, triggered either by seismic
activity or seasonal freeze-thaw. Examination of the many cliffs in the area, however,
suggests a high degree of stability.
Seismic Hazards
Potential seismic hazards at the proposed project area include vibratory ground
motion, ground rupture, seismically induced slope failure, and seiche. The megathrust
zone beneath southern Alaska and a random crustal event caused vibratory ground
motion. Random crustal events potentially could occur anywhere. Based on all known
sources of earthquakes that were close enough to the proposed project area to have
significant effects, the estimated maximum credible earthquake for a random crustal
event was assigned a magnitude of 6.0, a conservative upgrade from the maximum
recorded magnitude of 5.5. The maximum calculated acceleration at the site is 0.40
gravity from the random crustal event and 0.37 gravity from the 1964-type Aleutian Arc
megathrust.
Return periods for these maximum earthquake events were established using
historical and instrumental earthquake data. With a return period of more than 160 years,
the likelihood of another 1964-type event on the megathrust is considered low for the life
of the project, and with a recurrence interval of 50 to 100 years and a low probability of
such an event occurring in the proposed project area, the likelihood of a large, random
crustal event is moderate to high.
No known active faults cross the proposed project site, no evidence of seismic
events is present at the site, and no geologic data have been found to suggest the presence
of active faulting. Ground rupture is not considered to be a hazard for the site.
One of the most common features associated with moderate-to-large magnitude
earthquakes is slope failure. Triggered by ground motion, unstable slopes can fail. Slope
failure can be broadly classified into landslides, rockfalls, avalanches, and slab or
tumbling failures of rock faces. Little material in the project area would be susceptible to
landslides during seismic events. No evidence was found for the occurrence of major
landslides or of their deposits.
Rockfalls from the steep cliffs could occur during seismic shaking. Some
evidence of minor rockfalls has been found in the area, but the triggering mechanism is
unknown. The rock cliffs along the Upper Trail Lake Valley on the west slope below
Grant Lake are a potential source of rockfalls. A second rockfall area has been identified
on the steep slopes south of the proposed powerhouse location. The hazard is located
near the proposed access road to the intake structure.
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Seismically induced avalanches could occur in the mountains above the project;
however, the topography around the proposed project facilities does not appear to be
subject to a hazard from avalanche.
Slab or tumbling failure of rock faces during seismic events is common in areas of
unstable rock slopes. The western shore of Grant Lake is particularly susceptible to rock
slope failures because the slopes are steeply dipping slopes of bedrock. Data from the
early 1980s suggest that bedding-plane slides have already occurred in this location.
Seiches are lake waves formed by water sloshing back and forth resulting from the
ground shaking during seismic events or the catastrophic inflow of material by slope
failures around the lake’s rim. Several areas surrounding Grant Lake could be sources of
earth or avalanche material for mass movements into Grant Lake, potentially generating
seiche waves. Fieldwork conducted in 1984 did not reveal any areas along the shoreline
of Grant Lake where wave damage above normal high water levels was noted. This
observation suggests that significant wave run-up did not occur during the 1964
earthquake. Further, the volumes of material that could enter Grant Lake are probably
not sufficient to generate very large seiche waves.
Shoreline Erosion Potential
Element Solutions (2014) conducted a geomorphic study of Grant Lake and Grant
Creek that included an inventory and evaluation of shoreline conditions that affect
erosion potential around Grant Lake. For this analysis, several geomorphic units—
alluvial deltaic deposits, alluvial fan deposits, beach/littoral 32 deposits, colluvial 33
deposits, landslide deposits, and bedrock—were established.
The study found that, currently, wind-generated waves are likely the predominant
erosional process acting on the Grant Lake shoreline. An overlay of relative wind fetch 34
potential was applied to a map of the reservoir with the rationale that larger waves had
more energy and were more effective at eroding the shoreline area than smaller waves.
Field observations of wave run-up potential were made during the boat-based survey and
documented with photographs. The geomorphic units were integrated with the fetch
parameters to determine relative erodibility (table 3-1).
32 Related to or situated on the shore of the sea or a lake.
33 Material that accumulates at the foot of a steep slope.
34 The length of water over which a given wind has blown.
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Table 3-1. Relative erodibility integrating erosion susceptibility with wave energy
potential (Source: Element Solutions, 2014).
Relative
Fetch
Distance
Geomorphic Unit
Alluvial
Deltaic
Alluvial
Fan Beach Colluvium
Landslide
(bedrock) Bedrock
Short Moderate Moderate Moderate Low Low Low
Medium Moderate–
high
Moderate–
high
Moderate–
High
Moderate–
low
Moderate–
low
Low
Long High High High Moderate Moderate Low
The Grant Lake shoreline geomorphology is influenced by climate and seasonal
variability. The lake remains ice-free for about half of the year. During the ice-free
period, the water surface elevation fluctuates in response to snowmelt, glacial melt, and
precipitation. Wind-generated wave processes erode, rework, deposit, and transport
sediment in the littoral zone during the ice-free periods. The narrow confined valleys
flanking the lake control wind direction and intensity. Wind direction from east or west
has the greatest effect on the upper lake basin, but this wind direction has little effect on
the lower lake basin. Conversely, wind directions from north or south have the greatest
effect on the lower lake basin and only negligible effect on the upper lake basin. Because
the lake orientation is divided by a 90-degree “bend” about mid-point, the effective
maximum fetch is only about 3 miles. The largest wind-generated waves are at the
shorelines at the end of the fetch runs. The near-shore bathymetric conditions also affect
wave height and run-up potential.
The highest water surface elevations typically occur in the summer when
snowmelt and precipitation probability are highest or episodically in the fall when
transient snow and precipitation occur. Grant Lake’s outlet elevation (703 feet) and high
rainfall events and snowmelt from the watershed affect the lake’s water surface elevation.
The maximum water surface elevation of Grant Lake is about 703 feet. The ordinary
high water mark has apparent elevation increases where wind-generated wave run-up
occurs, including at the outlet at Grant Lake.
Grant Lake’s water surface elevation is lowest in the winter when the watershed is
frozen, virtually halting hydrologic input. When the lake is frozen, the effect of wind-
generated waves is likely negligible, except when the ice breaks up.
Grant Creek Spawning Substrate and Sediment Transport
Element Solutions (2014) also conducted a spawning substrate recruitment study
of Grant Creek as part of the geomorphic study to provide a basis for predicting and
assessing potential changes to material movement, sedimentation, and gravel recruitment
that may occur in with proposed operational management, especially the long-term
3-8
maintenance of fish spawning substrate. The spawning substrate study combined
quantitative and qualitative elements.
The geomorphic study focused on the potential effects on the spawning-size range
of sediment. Species of concern documented to use Grant Creek for spawning include
Chinook salmon, sockeye salmon, coho salmon, rainbow trout, and Dolly Varden. The
preferred spawning sediment size classes for these species typically range from 5 to
50 centimeters with rainbow trout preferring the smaller substrate range and Chinook the
larger.
For the spawning substrate recruitment study, Element Solutions (2014) divided
Grant Creek into six reaches from the Trail Bridge to Grant Lake and then further divided
the creek into three generalized geomorphic channel form reaches—Reaches 5 and 6
(Canyon Reach), Reaches 2 through 4 (Anastomosing 35 Reach), and Reach 1 (Alluvial
Fan Distributary36 Reach).
Reaches 5 and 6 consist of a confined bedrock channel and the primary source of
sediment recruitment for Grant Creek. The channel in this reach is steep and bedrock-
lined with limited sediment storage, both in volume and temporal duration. Most
sediment is stored in sediment wedges formed behind boulder obstructions. Extremely
high flows are capable of mobilizing these wedges and typically the channel cuts deeper
(incision) into the bedrock.
Reaches 2 through 4 are within the partially confined alluvial plain and typically
result in deposition in the channel with periods of channel cutting occurring during low
sediment input rates. Loss in hydraulic confinement and a change in gradient allow for
sediment deposition within these reaches when sediment input rates are high and
transport capacity is low. The channels and bedforms 37 in Reaches 2 through 4 are
sensitive to changes in flow regime and sediment load. Loss of side channel connectivity
results in a single thread channel, decreasing hydraulic complexity, concentrating stream
power, and often resulting in increased channel incision.
Reach 1 experiences horizontal and vertical channel movement and sediment
deposition. Distributary channel networks that disperse flow to Lower Trail Lake and
Trail Lake Narrows are accessed at a wide range of flows. Reach 1 is likely the most
35 The Anastomosing Reach consists of branching channels.
36 A distributary is a stream or channel that branches off and flows away from a
main stream channel and does not return to the main channel.
37 A bedform is a morphological relief feature formed by the interaction between
flow and small obstacles on the bottom of a stream bed consisting of movable (alluvial)
sediment materials.
3-9
dynamic reach in Grant Creek with respect to horizontal and vertical channel movements
and avulsions.38 The reach is very sensitive to disturbances, particularly sediment supply
and flow regime changes. Hydraulic complexity in Reach 1 is less complex than in
Reaches 2 through 4, and it is probable that there is a slight hydrologic loss experienced
in this reach.
Reaches 2 through 4 likely provide the greatest overall ecological function and
salmonid productivity relative to the other reaches. The rationale for this hypothesis is
that these reaches have: (1) the greatest hydraulic complexity, (2) the greatest wetted
channel length at moderate flows, (3) a more balanced wetted perimeter to depth at
moderate flows, (4) a higher probability of maintaining low and hyporheic 39 zone
connectivity in the winter, (5) more stability than Reach 1, and (6) lower velocity and
stream power than Reaches 5 and 6.
A small amount of suspended and dissolved sediment load from the upper
watershed reaches Grant Creek; however, Grant Lake arrests all bedload sediment
transport from the upper watershed area. Therefore, the sediment supply for Grant Creek,
excluding the throughput suspended sediment load, comes from Reaches 5 and 6. With
the majority of the sediment source for Grant Creek being derived from the canyon walls,
the geological formations present along this length of stream channel play a critical role
in generating bedload sediment. The primary process for generating new bedload
sediment in Grant Creek is the erosional forces that incise the canyon, causing wall
undermining and mass wasting (rockfall) from the canyon walls, and exposing the
geology to freeze-thaw and other surface erosion processes. As presented below in
section 3.3.2.1, table 3-4, recorded flows in Grant Creek have ranged from 6 to 2,140 cfs.
Analysis by Alaska DFG and Kenai Hydro resulted in the Kenai Hydro’s determination
that a flow of 800 cfs or greater would provide flows capable of mobilizing sediment in
Reaches 5 and 6.
Although Grant Creek within the alluvial plain exhibits net deposition over time,
under “normal” hydrologic conditions, it is a supply limited stream, meaning that the
sediment transport capacity of the stream is greater than the sediment supply to the
stream. A supply limited stream tends to migrate less laterally and vertically than a
transport limited stream, and channel form is more “stable.” Supply limited streams also
tend to be armored, incised, and exhibit a straight versus meandering channel form.
38 Avulsion is the rapid abandonment of a river channel and the formation of a new
river channel. Avulsions occur as a result of channel slopes that are much less steep than
the slope that the river could travel if it took a new course.
39 The hyporheic zone is the saturated interstitial areas beneath the streambed and
into the banks that contain some channel water.
3-10
Of the three geological formations present along the creek channel, the greywacke
is the most resistant rock type, whereas the sandy slate and slate are more friable and tend
to supply the majority of sediment to the streambed.
The sediment being recruited to Grant Creek is angular with the slate having a
“platy” particle morphology and the greywacke having long “blocky or brick-like”
particle morphology. Angular sediment also transports across the channel bed (rolling
and bouncing) and entrains differently than does rounded sediment. The particle
morphology of Grant Creek likely increases the armoring qualities of the bed and thus
adds to the overall stability of the channel form.
The cycle of melting snow and precipitation in the summer and frozen watershed
conditions in the winter are the predominant drivers of hydrology in Grant Creek. The
bankfull and peak flows dominate the fluvial geomorphic processes of Grant Creek. The
streambed comprises large sediment particles and the bed is armored, so only the larger
flows are able to mobilize the bed armoring, transport sediment en masse, and reorganize
bedforms. Snowmelt conditions offer the sustained flows, allowing for a longer duration
of time in which to organize the substrate, construct and arrange the geomorphic channel
bed structures, and allow channel form development.
3.3.1.2 Environmental Effects
Construction Effects on Geology and Soils
Project construction has the potential to cause erosion and overland sedimentation
that could affect water quality in Grant Lake, Grant Creek, and Trail Lake Narrows
between Upper and Lower Trail Lakes. Kenai Hydro would construct the project intake
structure in Grant Lake near the natural outlet of the lake that allows flow into Grant
Creek. Kenai Hydro proposes to construct the following project elements:
• bypassed reach weir at the outlet of the lake;
• powerhouse and powerhouse parking area;
• powerhouse tailrace and fish exclusion weir adjacent to Grant Creek;
• powerhouse access road;
• powerhouse access road and a road bridge to cross Trail Lake Narrows; and
• intake access road, which would extend from the powerhouse access road
near the powerhouse to the intake structure at Grant Lake.
In addition, Kenai Hydro proposes to re-route the INHT to move it away from the
location of the powerhouse and associated structures, which Kenai Hydro proposes to
locate just outside the 100-foot easement of the currently planned route for the INHT.
The path of the re-routed INHT would deviate from the current route about 1,250 feet
north of Grant Creek, proceed along a 4,102-foot-long path to Grant Creek about 1,000
feet west of the proposed powerhouse, across a new footbridge over Grant Creek, and
3-11
proceed along a 4,277-foot-long path from Grant Creek to Vagt Lake at the point where
the current planned INHT path would reach Vagt Lake. The proposed re-route of the trail
would require an additional 6,870 square feet (0.15 acre) of permanently disturbed
ground area.40
Kenai Hydro proposes to develop and implement an ESCP that would include
measures to minimize erosion and sediment deposition during construction, but does not
describe any specific measures for inclusion in the plan. Kenai Hydro proposes a global
adherence to unspecified BMPs used in conjunction with all project construction and
operation activities. Kenai Hydro proposes to develop a series of monitoring and
management plans after a license is issued to ensure that construction and operation of
the project do not change or adversely affect existing processes associated with erosion
and sediment deposition.
Kenai Hydro also proposes to construct a cofferdam around the intake structure
site so that construction could take place in the dry to reduce the potential for sediment
transport into the lake.
Following completion of construction of project structures, Kenai Hydro proposes
to revegetate remaining open areas disturbed by construction as outlined in the proposed
draft Vegetation Management Plan. The plan includes specifications for revegetation,
monitoring of revegetated plants, and maintenance of revegetated areas to ensure
successful revegetation, which would also reduce or eliminate the potential for erosion in
those areas. Section 3.3.3.2, Terrestrial Resources, Environmental Effects, presents a
detailed discussion of the Vegetation Management Plan. Finally, Kenai Hydro states it
would restore all temporarily impacted areas associated with project construction back to
“natural” conditions. Although it is not anticipated that these areas would be numerous
or cover a large area, examples of areas to be restored may include temporary laydown
areas for infrastructural materials or parking/pull-out areas for construction equipment.
Kenai Hydro would refine the list of restoration areas as construction neared conclusion
and review plans with stakeholders prior to conducting restoration activities.
Alaska DFG 10(j) recommendation 13 and FWS 10(j) recommendation 14
recommend Kenai Hydro develop an ESCP that would include the following: (1) soil,
groundwater and vegetation conditions; (2) preventive measures based on site-specific
conditions; (3) location of areas for storage or deposition of removed overburden
including erosion control to be used in those areas; and (4) prescriptions for revegetation
of all disturbed areas, including location of treatment areas, plant species and methods to
be used; and (5) implementation schedule.
40 This corresponds to an 18-inch-wide trail surface for a Forest Service Trail
Class 3 but does not include the clearing of high vegetation to provide the desired trail
corridor width and height clearances for the proposed trail uses (pedestrian/hiking,
bicycling, and pack and saddle/equestrian).
3-12
The recommendations also suggest that Kenai Hydro pay particular attention to
about 500 feet of access road east of Trail Lake Narrows, where private property
necessitates construction of the road and transmission line corridor within 100 feet of
Grant Creek. Because this section of road would also be constructed adjacent to Trail
Lake Narrows, it is assumed that the agencies’ concern also applies to Trail Lake
Narrows. The plan would be required to include provisions for bank stabilization and
ongoing monitoring along this section of the road and transmission line corridor.
The agencies also recommend that Kenai Hydro prepare the plan after consultation
with Alaska DFG (Alaska DFG recommendation), FWS (Interior recommendation), and
other requesting agencies.
Forest Service final 4(e) condition 19 specifies that Kenai Hydro add the
development of an ESCP to its list of plans, but provides no details. However, in its
comments in response to the Ready for Environmental Analysis notice filed with the 4(e)
conditions, the Forest Service provides details of what the plan would entail.41 The
Forest Service would require that within 1 year following the date of license issuance and
at least 90-days prior to any land-disturbing activity, Kenai Hydro file a plan that is
approved by the Forest Service to control erosion, stream sedimentation, dust, and soil
mass movement consistent with the standards and guidelines of the Chugach National
Forest Land Management Plan (USDA, 2002), Soil and Water Conservation Handbook
(USDA, 2006), and the National Best Management Practices for Water Quality
Management on National Forest System Lands (USDA, 2012). Upon Commission
approval, Kenai Hydro would implement the plan, which would be based on actual site
geological, soil, surface water and groundwater conditions and include: (1) a description
of the actual site conditions, including any existing erosion or sedimentation problems
from roads, stream crossings, trails, or other facilities; (2) detailed descriptions, design
drawings, and specific topographic locations of all control measures; (3) measures to
divert runoff over disturbed land surfaces, including sediment ponds at the diversion and
powerhouse sites; (4) revegetation of areas outside the roadbed; (5) measures to dissipate
energy and prevent erosion at the tailrace; (6) a monitoring and maintenance schedule;
and (7) any other measures the Forest Service, and Kenai Hydro mutually identify as
needing care to ensure resource protection. The plan and erosion control measures would
comply with the Soil and Water Conservation Handbook (USDA, 2006), and National
Best Management Practices for Water Quality Management on National Forest System
Lands (USDA, 2012). Erosion control measures would be designed to retain the
appearance of the surrounding area where practicable.
41 We anticipate any final 4(e) conditions from Forest Service would include the
detailed description of an ESCP included in the comments section of the Forest Service’s
Ready for Environmental Analysis letter. Therefore, we analyze the detailed plan as a
10(a) recommendation.
3-13
Forest Service final 4(e) condition 19 specifies that Kenai Hydro add the
development of a spoils disposal plan to its list of plans but provides no details. Forest
Service final 4(e) condition 19 also specifies that Kenai Hydro add the development of a
construction plan to its list of plans, but it did not provide any details.
Our Analysis
Construction of the intake structure access road and adjacent project components
would require permanent ground disturbance of about 3.44 acres of land. Construction of
the powerhouse, work area, penstock, detention pond, tailrace, and the buffers
surrounding these structures would require the permanent ground disturbance of about
0.92 acre of land. Construction of the powerhouse access road and transmission line
corridor would require the permanent ground disturbance of 4.06 acres of land between
Seward Highway and the powerhouse.
In addition, Kenai Hydro would use about 1.46 acres for stockpile storage,
laydown areas, and temporary parking areas for construction and vehicles. Table 3-2
provides the size of these areas.
Table 3-2. Areas temporarily disturbed by project construction (Source: Kenai Hydro,
2018a).
Area Location Description Approximate Size
Bridge crossing Located on the north side of the powerhouse
access road (Station 13+00) and on the west
bank of the bridge crossing.
9,000 square feet/
0.20 acre
Powerhouse
access road
Located on the south side of the powerhouse
access road at about Station 35+50.
17,500 square feet/
0.40 acre
Powerhouse Located on the west side of the powerhouse
and bordered by the powerhouse access road
(Station 51+00), this area would remain
outside the streambank protection zone. At
the conclusion of construction, this area
would become the powerhouse parking lot.
27,000 square feet/
0.62 acre
Intake access
road
Located at the second switchback of the
intake access road (Station 17+00). Sufficient
space for the stockpile storage and parking
area on both the north and south sides of the
access road.
5,600 square feet/
0.13 acre
Intake access
road
Located on the north side of the intake access
road at Station 42+00.
1,500 square feet /
0.03 acre
Intake Located on the north side of the intake access
road at Station 58+50.
3,600 square feet /
0.08 acre
3-14
Kenai Hydro does not provide any detail about what measures it would include in
its proposed ESCP. Therefore, we cannot determine whether the proposed plan would
reduce the potential for erosion and sediment transport to adjacent waterways in
conjunction with the construction of the project structures and roadways. However, the
Forest Service recommends provisions for the plan, which would define areas to be
remediated and provide more detail about the methods to be used to remediate the areas.
The additional provisions listed in the Forest Service’s comments on the amended final
license application would dovetail with the details provided by Alaska DFG and FWS
and provide further detail for the plan. The Forest Service lists guidance documents to be
considered in the development of the plan and requires design drawings for soil erosion
and control measures and location maps to identify where those measures would be
employed.
Kenai Hydro proposes to re-use excavated materials as part of the construction,
including re-using excavated rock that is then crushed and applied to road surfaces and
top soil applied to disturbed areas for revegetation.
We expect the spoil disposal plan for the project: (1) means and methods used to
dispose of any materials excavated during construction, (2) mapped locations of any
proposed temporary and/or permanent spoil pile locations, (3) descriptions of the material
composition of any materials expected to be excavated on the site and appropriate uses of
such materials for construction, (4) proposed use of excavated materials in the
construction process, (5) any plans to dispose of materials offsite, (6) methods to be
employed to prevent spoil materials from leaching from spoil piles into adjacent
waterways and wetlands, and (7) identification of other resource-specific protection plans
that should be considered during construction activities.
The following components should adequately protect aquatic and terrestrial
resources if included in a construction plan for the project: (1) a detailed construction
schedule; (2) a description of construction methods and BMPs to be employed including
measures to reduce the risk of introduction or spread of invasive plants; (3) requirements
to delineate construction areas using fencing and/or flagging; (4) identification of
measures to avoid streams, wetlands, and pond habitats to the extent possible during
construction; (5) provisions for environmental training of construction staff regarding
laws, regulations, and BMPs to avoid or reduce effects on native plant and wildlife and
their habitats; and (6) identification of other resource-specific protection plans that should
be considered during construction activities. Developing a construction plan, as Forest
Service final 4(e) condition 19 specifies, would ensure, for example, that measures to
prevent erosion are not planned within protective buffers and during limited operating
periods devised to protect nesting birds. Because soil disturbance would not occur within
the protection buffers during the limited operation period, it would be appropriate to limit
construction of erosion protection measures in these areas to periods outside of the
nesting season. Such a plan would also facilitate agency review of proposed measures
and aid communication with contractors and construction staff.
3-15
Kenai Hydro’s proposed water quality monitoring during construction that
includes turbidity monitoring and monitoring of erosion and sediment control measures
in place during construction should address any concerns related to effects of project
construction. Therefore, we do not see the need for additional monitoring and
management plans related to project construction.
Operation Effects on Geology and Soils
Project operation effects on geology and soils would occur from lake level
fluctuations on Grant Lake, flow fluctuations in Grant Creek, use and maintenance of the
project access roads, and maintenance of the transmission line right-of-way (ROW).
Lake Level Fluctuations
Kenai Hydro proposes to maintain the level in Grant Lake between elevation 690
and 703 feet. As discussed above in section 3.3.1.1, Geologic and Soil Resources,
Affected Environment, the shoreline around Grant Lake is currently subject to rockslides,
rockfalls, and wind-driven erosion. Under existing conditions, Kenai Hydro estimates
that lake levels are at their maximum (estimated elevation 703) during June through
September.
Grant Lake’s water surface elevation typically fluctuates 6 to 8 feet over the
course of a year and may fluctuate as much as 11 feet (692–703 feet). The lake is
generally at its maximum elevation from June through September. Under proposed
operation, the lake level fluctuation could be up to 13 feet (690–703 feet). Project
operations would draw down the lake during the fall and winter and allow it to refill in
the spring and summer, returning to normal maximum elevation by mid-August.
Kenai Hydro proposes no measures related to shoreline erosion, and none of the
resource agencies recommend measures.
Our Analysis
Proposed operation would reduce lake levels in the winter when ice may be in
place and when wave and stream erosion processes are less active. The shoreline at and
below elevation 703 feet predominantly consists of bedrock or coarse, angular boulders
with a low susceptibility to erosion. Proposed operation would reduce the period that the
lake level is at one elevation, especially peak lake levels, which would decrease the
frequency of wave events occurring at any one elevation and reduce the effects of wave
erosion at any one elevation along the shoreline. Therefore, no additional measures are
warranted.
Flow Effects on Sediment Transport
Flows in the bypassed reach would vary over the course of the year, and the flows
in the upper reaches (Reaches 5 and 6) of Grant Creek would be lower than flows in the
lower reaches (Reaches 1 through 4) of Grant Creek (downstream of the powerhouse
tailrace) in accordance with minimum flow requirements for the project. Reduced flows
3-16
in Reaches 5 and 6 are expected to reduce the amount of gravel recruitment in Grant
Creek and, therefore, are likely to diminish the quantity and quality of spawning habitat
over time.
Our Analysis
Reduced flows in the bypassed reach resulting from project operation would likely
degrade substrate quantity and quality as a result of: (1) an increased coarsening of
surface bedload sediment as sediment supply decreases from Reach 5 and as smaller
surface sediment is transported out of the reach by operational flows; (2) increased
armoring and pavement depth as subsurface fines are mobilized and washed out;
(3) decreased geomorphic channel form complexity (loss of side-channel and floodplain
connectivity, and development of a single-thread channel) resulting from decreased
sediment supply that would increase primary channel incision and stream velocity; and
(4) decreased quantity of channel bedforms resulting from decreased sediment supply and
decreased sediment transport with the reduce flow regime in Reaches 5 and 6. Because
these geomorphic changes primarily affect aquatic habitat, these changes are discussed
and analyzed in section 3.3.2.2, Aquatic Resources, Environmental Effects. Kenai
Hydro’s proposed 800-cfs channel maintenance flow releases are also discussed and
analyzed in that section.
Use and Maintenance of Project Roadways and the Transmission Line Right-of-
Way
Kenai Hydro would use the powerhouse and intake structure access roads
periodically, but infrequently, to monitor project operation and to maintain project
structures, including the project roads and transmission lines. Kenai Hydro proposes to
maintain these roads, including plowing during the winter. Plowing could result in
related erosion along the roadway shoulders, runoff, siltation, and turbidity in adjacent or
nearby wetlands and streams.
To address potential effects of road and transmission line maintenance, Kenai
Hydro proposes to develop an ESCP for construction and operation of the project.
Alaska DFG and FWS recommend and the Forest Service (final 4(e) condition 19)
specifies that Kenai Hydro develop an ESCP.
Our Analysis
Implementation of the ESCP for the project discussed in section 3.3.1.2, in the
Construction Effects subsection, coupled with maintenance of the project roadways
during project operation, should ensure that the project roadways do not cause erosion
and sediment transport to Grant Lake, Grant Creek, wetlands, or streams. Maintenance
of the transmission line would likely involve vegetation cutting or clearing to allow
access and ensure adequate electrical clearance below and around the lines. Much of the
line corridor parallels proposed roadways, so access for line maintenance could be
accomplished by vehicles on the roads in most places; therefore, we expect effects on
geology and soils during these maintenance activities would be minimal.
3-17
3.3.2 Aquatic Resources
3.3.2.1 Affected Environment
Water Quantity
Grant Lake is a 1,741-acre waterbody created by glacial activity. It encompasses
two almost separate bathymetric lake basins, which are separated by a shallow
submerged ridge near the lake’s midpoint. Grant Lake has a gross storage volume of
260,120 acre-feet at the normal mean water surface elevation of 703 feet, a mean depth of
about 91 feet, and a maximum depth of 283 feet in the upper basin and 262 feet in the
lower basin. The lake is primarily fed by snowmelt and additional runoff from the Kenai
Mountain Range. Inlet Creek, the predominant feeder stream in the upper portion of the
watershed, drains melting alpine glaciers and snow from the nearby mountains into Grant
Lake. At its natural outlet, Grant Lake drains an area of about 43 square miles.
Alaska Power Authority, now Alaska Energy Authority, studied seasonal water
level fluctuations from January 1982 through December 1983. The maximum difference
in water surface elevation observed during the 2-year study period was a 5.3-foot
decrease from the normal mean water surface elevation of 703 feet. The greatest inter-
monthly changes occurred during ice breakup and snowmelt from late March through late
June, with an average lake elevation increase of 0.8 foot per month. Maximum lake
elevations were observed in July, with decreasing water levels averaging 0.33 foot per
month in the fall and winter (Ebasco, 1984).
From Grant Lake, Grant Creek flows west for 1 mile, draining into Upper and
Lower Trail Lakes. Just above its confluence with Upper Trail Lake and Lower Trail
Lake, Grant Creek has a mean annual flow of 206 cfs, and average monthly flows range
from a low of 33 cfs in March to a high of 503 cfs in July. Table 3-3 presents a summary
of gage 42 information used to develop the synthetic streamflow record for Grant Creek.
Table 3-4 provides composite mean monthly and annual discharge data for Grant Creek
that represents 66 years of daily streamflow data from 1948 through 2013.
42 The final license application, proposed mitigation plans, and agency
recommendations use several naming conventions for gages that were used during
licensing studies and proposed gages for monitoring. It is our understanding that
proposed gage GC100 would be in the same location as GC100 and GC200 would be in
the same location as GC200. For consistency, we use the GC naming convention for all
gages in Grant Creek.
3-18
Table 3-3. Streamflow gage information for gages used in developing the synthesized
flow record for Grant Creek.
Gage Name
(Number)
Drainage
Area Dates Operational
Flow
(cfs)
Mean Max. Min.
U.S. Geological Survey
(USGS) Grant Creek
near Moose Pass
(15246000)a
43.8 September 1, 1947,
to September 30,
1958
192 2,140 11
Ebasco GC200
(GC200)b
43.8 January 1, 1981, to
December 31, 1983
268 602 18
Kenai Hydro GC200
(GC200)c
43.8 April 3, 2013, to
presentd
279 1,005 16
a USGS (2018)
b GC200 data were taken from the amended final license application.
c USGS (2018)
d Data only available through 2013.
Table 3-4. Minimum, maximum, and mean monthly and annual synthesized flow
values for Grant Creek 1948–2013 (Source: Kenai Hydro, 2018a).
Month
Minimum Flow
(cfs)
Mean Flow
(cfs)
Maximum Flow
(cfs)
January 12 52 326
February 11 43 227
March 6 33 116
April 13 36 160
May 17 146 566
June 102 409 2,140
July 210 503 1,210
August 173 444 1,383
September 65 367 1,731
October 45 233 1,295
November 28 123 851
December 18 73 570
Annual 6 206 2,140
3-19
Water levels can fluctuate in Grant Lake between the normal mean water surface
elevation of 703 feet and the minimum water surface elevation of 690 feet; however,
water surface elevations more typically fluctuate between 698 feet and 703 feet. Grant
Lake’s highest water surface elevations occur during the summer when snowmelt and
precipitation are highest, and its water surface elevation is lowest during the winter when
the watershed is frozen.
Water Quality
Water Quality Standards
Designated uses of a waterbody and criteria to protect those designated uses are
defined by Alaska DEC’s water quality standards provided in 18 Alaska Administrative
Code 70 (Alaska DEC, 2018). Alaska’s list of impaired or 303(d) listed waterbodies lists
any waterbodies within Alaska that do not meet applicable water quality standards. The
most recent EPA-approved 303(d) list does not include any waterbodies in the project
area (Alaska DEC, 2010). Water quality standards applicable to surface waters in the
project area are summarized below (table 3-5).
Table 3-5. Alaska DEC water quality standards applicable to the project area (Source:
Alaska DEC, 2018).
Constituent Water Quality Standards
Color Color or apparent color may not reduce the depth of the
compensation point for photosynthetic activity by more than 10%
from the seasonally established norm for aquatic life. For all waters
without a seasonally established norm for aquatic life, color or
apparent color may not exceed 50 color units or the natural condition,
whichever is greater.
Temperature May not exceed 20 °C at any time. The following maximum
temperatures may not be exceeded, where applicable:
• Migration routes—15°C
• Spawning areas—13°C
• Rearing areas—15°C
• Egg and fry incubation—13°C
For all other waters, the weekly average temperature may not exceed
site-specific requirements needed to preserve normal species
diversity or to prevent appearance of nuisance organisms.
Dissolved gas Dissolved oxygen (DO) must be greater than 7 milligrams per liter
(mg/L) in waters used by anadromous or resident fish. In no case
may DO be less than 5 mg/L to a depth of 20 centimeters in the
interstitial waters of gravel used by anadromous or resident fish for
3-20
Constituent Water Quality Standards
spawning (see note 2). For waters not used by anadromous or
resident fish, DO must be greater than or equal to 5 mg/L. In no case
may DO be greater than 17 mg/L. The concentration of total
dissolved gas may not exceed 110% of saturation at any point of
sample collection.
pH May not be less than 6.5 or greater than 8.5. May not vary more than
0.5 pH unit from natural conditions.
Turbidity May not exceed 25 nephelometric turbidity units (NTU) above
natural conditions. For all lake waters, may not exceed 5 NTU above
natural conditions.
Fecal coliform In a 30-day period, the geometric mean of samples may not exceed
126 Escherichia coli (E. coli) colony forming units/100 milliliters,
and not more than 10% of the samples may exceed a statistical
threshold value of 410 E. coli colony forming units/100 milliliters.
Note: Applicable standards are based on those for fresh water Class C—growth and
propagation of fish, shellfish, other aquatic life, and wildlife.
In addition to the above, standards for mercury and lead are relevant to the water
quality sampling conducted by Kenai Hydro. Freshwater acute and chronic standards for
mercury are 1.4 micrograms per liter (μg/L) and 0.77 μg/L, respectively (Alaska DEC,
2008).43 Acute and chronic standards for lead are a function of hardness, either measured
directly or calculated from calcium and magnesium concentrations (Alaska DEC, 2008).
Lower hardness leads to greater susceptibility of fish and aquatic organisms to a given
lead concentration, and thus lower acute and chronic criteria.
Based on an average hardness of 37 milligrams per liter (mg/L) (range of 33 mg/L
to 41 mg/L) throughout all sampling events (including Grant Creek, Grant Lake, and
Trail Lake Narrows), we calculated freshwater acute and chronic standards for lead
applicable to Kenai Hydro’s sampling data: 21.6 μg/L and 0.84 μg/L, respectively. The
latter are based on 20 hardness values, including 13 reported laboratory measurements
and 7 calculated based on calcium and magnesium concentrations. We note this differs
43 Per Alaska ADEC (2008), acute criteria are based on the average concentration
of chemical pollutants during a 1-hour period, while chronic criteria are based on the
average concentration of chemical pollutants during a 4-day period. Chronic criteria are
typically stricter than the acute criteria and are therefore used to protect ambient waters.
Acute and chronic criteria are used together to develop water quality-based effluent
limits.
3-21
slightly from lead standards reported by Kenai Hydro: 16.4 μg/L (acute); 0.64 μg/L
(chronic) (Kenai Hydro, 2016).
The Alaska DEC 2014/2016 Integrated Water Quality Monitoring and Assessment
Report (known as the 303(d) report), includes Grant Creek as a Category 3 Waterbody,
for which “there are insufficient or no data or information to determine if the WQS are
attained” (Alaska DEC, 2017). We summarize existing water quality and temperature
data for Grant Creek and Grant Lake below, including a comparison to state standards
where possible.
Water Quality Sampling
Kenai Hydro collected grab samples for laboratory analysis and in situ water
quality measurements at two sites in Grant Lake, one near the proposed intake (GLTS),
and the other near the lake outflow (GLOUT). Three sites were sampled in Grant Creek
(GC100, GC200, GC300), and one site near Trail Lake Narrows. Grant Creek sites were
all located downstream of the Canyon Reach and the proposed powerhouse location.
Table 3-6 depicts the timing and frequency with which Kenai Hydro performed water
quality sampling, and figure 3-1 shows locations of the sampling sites in the project area.
We summarize results of Kenai Hydro’s water quality sampling of Grant Lake, Grant
Creek, and Trail Lake Narrows below. Water temperature monitoring results are
discussed separately later in this section.
Table 3-6. Water quality sampling events at Grant Creek and Grant Lake sites, 2009–
2013 (Source: staff).
Site
June
2009
August
2009
June
2010
June
2013
August
2013
September
2013
GLTS
GLOUT
GC300
GC200
GC100
TLN
3-22
Figure 3-1. Water quality/water temperature study locations (Source: Kenai Hydro, 2018a, as modified by staff).
3-23
Grant Lake—Kenai Hydro sampled Grant Lake at site GLTS, representing
conditions of the lower basin; and Site GLOUT, representing outflow conditions into
Grant Creek. The GLTS site was located in the immediate vicinity of the proposed intake
structure. Both sites were sampled in August 2013 at selected depths for grab analyses
and at 1-meter depth intervals for in situ parameters. No parameter sampled exceeded
water quality standards during the August 2013 sampling event.
Grant Lake nutrient concentrations were low throughout Kenai Hydro’s
monitoring program. Total and ortho-phosphorus values were typically not detectable
with the only measurable value for either a concentration of 0.1 mg/L ortho-phosphorus
in August 2013. Nitrate values ranged from 0.175 to 0.651 mg/L over the course of all
sampling events. Turbidity was low; generally less than 5 nephelometric turbidity unites
(NTUs), and DO was high throughout the water column at both stations. Total and
suspended solids were also low during all sampling events.
In situ sampling during 2013 at the GLTS site was conducted from the surface
down to a bottom depth of 17 meters. DO ranged from 103.6 percent saturation at the
surface to 94.5 percent saturation at the bottom. At mid-depth (8.0 meters), DO was
100.9 percent saturation. DO concentrations for these same depths ranged from a surface
reading of 11.15 mg/L, increasing to 11.76 mg/L at the bottom. Mid-depth DO was
11.18 mg/L; pH levels at the GLTS site ranged from 7.26 standard units at the surface to
7.42 standard units at the bottom. Neither Secchi disk nor chlorophyll a were measured;
however, in situ results, conductivity, alkalinity, measured cation/anion, and nutrients
were low and reflect dilute, oligotrophic conditions.
Mercury concentrations were less than the Alaska DEC chronic standard of
0.77 μg/L in all Grant Lake samples. A lead concentration of 1.1 μg/L at the GLTS site
(10-meter depth) in June 2009 exceeded the calculated chronic freshwater standard of
0.84 μg/L.
Review of Grant Lake water quality data summarized by Ebasco (1984) indicates
that the 2013 data are consistent with historical results. However, measurements of DO
(saturation and concentration) at Grant Lake sites GLOUT and GLTS were both low—50
to 60 percent saturation in 2009 and 75 percent in 2010. Kenai Hydro attributed these
prior measurements of low DO concentrations and percent saturation to faulty calibration
and/or instrumentation.44 We agree these values are likely erroneous.
Grant Creek—In 2009, Kenai Hydro established three water quality sampling
stations in Grant Creek (GC100, GC200, and GC300, see figure 3-1). Kenai Hydro
44 Kenai Hydro attributed the low DO concentrations and percent saturation to
either poor calibration or faulty instrumentation, leading to the use of two H ydrolabs for
in situ measurements in 2013.
3-24
collected samples at these stations in June 2010 and August 2013. Kenai Hydro noted
that little longitudinal variation occurred between the water quality sampling locations
and therefore deemed the mid-station site of GC200 representative. Turbidity values at
GC200 ranged from 4.0 to 4.6 NTUs, DO ranged from 10.95 to 11.02 mg/L, and pH
values ranged from 7.00 to 7.18 standard units.
In general, water quality at the Grant Creek sites was similar but more dilute
compared to other waterbodies in the area, with low dissolved solids and total
phosphorus, and low alkalinity (Orejuela, 2014; Brabets et al., 1999). Ebasco (1984)
notes that glaciers have retreated to the upper limits of the watershed and only a few
small alpine glaciers and snow fields are currently present in the area near Solars
Mountain. The likely reasons for comparatively low alkalinity, low dissolved solids, and
low nutrient concentrations in samples collected from Grant Creek are watershed
geochemistry, the lack of glacial runoff, and Grant Lake serving as a sediment trap.
Kenai Hydro sampled lead and mercury in Grant Creek during the 2009, 2010, and
2013 field seasons and Trail Lake Narrows during 2013 only. Mercury concentrations
were less than the Alaska DEC chronic standard of 0.77 μg/L during all sampling events.
A lead value of 3.09 μg/L at GC200 in June 2009 exceeded the calculated chronic
standard of 0.84 μg/L. Lead values were also near the chronic standard in Grant Creek in
June 2009 and June 2010 at the GC100 site (0.597 μg/L during each event).
Trail Lake Narrows—Kenai Hydro conducted three sampling events at the Trail
Lake Narrows site (June, August, and September 2013). Sampled parameters included
those measured at Grant Creek sites, plus gas and diesel compounds. No parameter
sampled exceeded water quality standards during any sampling event, although Trail
Lake Narrows routinely had the highest turbidity readings of all sites in 2013 (about
9 NTUs).
Grant Creek/Grant Lake Temperatures—All temperature data collected in Grant
Creek met the 20°C criterion set by Alaska DEC. With the exception of 2013, standards
for rearing and migration (15°C) and spawning and egg/fry incubation (13°C) were also
met. Mean daily temperatures mid-July through early August 2013 at site GC200
exceeded both the 13°C spawning criteria, as well as the 15°C rearing criteria (figure 3-
2). Daily mean temperatures at sites GC100 and GC600, the upper-most and lower-most
sites monitored, were virtually identical, showing longitudinal changes in temperature
within Grant Creek were minimal (figure 3-3).
Continuous temperature profiles for Grant Lake at the GLTS site are shown below
for 2013 (figure 3-4). Relatively strong stratification was seen in June through August,
with maximum surface temperatures approaching 16°C by July 30. Drops in temperature
of about 1°C per meter from the surface to about 8 meters occurred at the end of July.
Kenai Hydro noted that isothermal conditions were observed by mid- to late September,
consistent with historical temperature profiles from earlier studies.
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Figure 3-2. Grant Creek water temperatures, 2009–2013 (Source: Kenai Hydro, 2018a, as modified by staff).
3-26
Figure 3-3. Mean daily temperatures at all Grant Creek sites, 2013 (Source: Kenai Hydro, 2018a).
3-27
Figure 3-4. Grant Lake temperature profiles, 2013 (Source: Kenai Hydro, 2018a, as modified by staff).
3-28
Fishery Resources
Fish Populations
Grant Lake—No anadromous fish species are found in Grant Lake or its
tributaries because of the presence of an impassable falls in Reach 6 of Grant Creek
(FWS, 1961; AEIDC, 1983; Ebasco, 1984), and Grant Lake is not included in Alaska
DFG’s anadromous waters catalog (Johnson and Daigneault, 2008). Grant Lake appears
to support only resident populations of slimy sculpin, Coast Range sculpin, and
threespine stickleback (AEIDC, 1983, FWS, 1961, Johnson and Klein, 2009). Alaska
DFG stocked coho salmon fry in Grant Lake from 1983 to 1986 with limited success.
However, these stocking efforts may have enhanced returns to Grant Creek (Marcuson,
1989). No fish are present in the tributaries to Grant Lake (AEIDC, 1983).
Grant Creek—Chinook and coho salmon, rainbow trout, and Dolly Varden are
known to spawn and rear in the lower reaches of Grant Creek (Ebasco, 1984; Johnson
and Klein, 2009). Angling surveys also documented round whitefish and arctic grayling
in the creek; however, it is unlikely that these species spawn in Grant Creek
(Ebasco, 1984).
In 2013, Kenai Hydro conducted a series of fisheries investigations to characterize
spawning distribution, run timing, and relative abundance of fish in Grant Creek
(BioAnalysts, Inc., 2014). Juvenile fish were captured using incline plane traps, minnow
traps, and beach seining, or observed during snorkeling surveys. Adult fish were
captured by using a picket-style weir, or observed during weekly radio telemetry
tracking, redd surveys, visual surveys, and carcass surveys. Based on weir counts and
visual counts of salmon above and below the weir in 2013, Kenai Hydro estimates that
escapement to Grant Creek was 90 Chinook, 1,169 sockeye, and 252 coho salmon (table
3-7). Run timing for adult salmon extended over a 13-week period beginning at the end
of July and concluded near the end of October (table 3-7).
Ebasco (1984) estimated that Grant Creek supported 250 Chinook and 1,650
sockeye spawners; maximum counts from intermittent stream surveys by Alaska DFG
were 76 Chinook salmon in 1963 and 324 sockeye salmon in 1952 (Johnson and Klein,
2009). Kenai Hydro conducted surve ys in 2010 and estimated escapement in Grant
Creek to be 231 Chinook salmon, and 6,293 sockeye salmon, but these estimates were
developed using the area-under-the-curve methodology and may have been biased by
critical components of the calculation being based on professional judgement, rather than
empirical data.
3-29
Table 3-7. Run timing by week of year for pink, Chinook, sockeye, and coho salmon
assessed at weir on Grant Creek, 2013 (Source: BioAnalysts, Inc., 2014).
Week of Year Dates Pink Chinook Sockeye Coho
31 Jul 28–Aug 03 0 0 5 0
32 Aug 4–Aug 10 6 0 3 0
33 Aug 11–Aug 17 2 11 16 0
34 Aug 18–Aug 24 1 3 220 0
35 Aug 25–Aug 31 1 7 601 0
36 Sep 1–Sep 7 0 2 201 0
37 Sep 8–Sep 14 0 0 65 16
38 Sep 15–Sep 21 0 0 4 17
39 Sep 22–Sep 28 0 0 0 40
40 Sep 29–Oct 5 0 0 1 96
41 Oct 6–Oct 12 0 0 1 42
42 Oct 13–Oct 19 0 0 0 21
43 Oct 20–Oct 26 0 0 0 1
Total 10 23 1,117 237
Salmon started building redds in Grant Creek during the first week of August and
ended their spawning activity around the end of October (table 3-8). Pink salmon began
spawning in early August; Chinook salmon began spawning in mid-August; and sockeye
salmon began spawning at the end of August. Sockeye salmon spawning activity (active
digging) was observed until the last week of September. Coho began spawning the first
week of October and were complete at the end of the month.
3-30
Table 3-8. New redds constructed in Grant Creek by week of the year for pink,
Chinook, sockeye and coho salmon in 2013 (Source: Kenai Hydro, 2018a).
Week Dates Pink Chinook Sockeye Coho Total
31 Jul 28–Aug 3 0 0 0 0 0
32 Aug 4–Aug 10 2 0 0 0 2
33 Aug 11–Aug 17 0 0 0 0 0
34 Aug 18–Aug 24 0 1 0 0 1
35 Aug 25–Aug 31 0 3 200 0 203
36 Sep 1–Sep 7 0 2 108 0 110
37 Sep 8–Sep 14 0 0 MS 0 0
38 Sep 15–Sep 21 0 0 MS 0 0
39 Sep 22–Sep 28 0 0 MS 0 0
40 Sep 29–Oct 5 0 0 0 5 5
41 Oct 6–Oct 12 0 0 0 47 47
42 Oct 13–Oct 19 0 0 0 13 13
43 Oct 20–Oct 26 0 0 0 6 6
44 Oct 27–Nov 2 0 0 0 1 1
45 Nov 3–Nov 9 0 0 0 0 0
Total 2 6 308 72 388
Note: A designation of “MS” (mass spawning) means that new redds and old redds
could not be distinguished in the mass spawning aggregates.
Kenai Hydro developed a life stage periodicity for each of the salmonid species
and life history stages (table 3-9). The periodicity for each species were reviewed and
approved by the Instream Flow Subgroup of the Natural Resource Work Group,
consisting of state and federal resource agency staff, Kenai Hydro staff, and interested
members of the local community.
3-31
Table3-9. Grant Creek salmonid periodicity (Source: Kenai Hydro, 2018a, as modified by staff).
Note: Table is color-coded by species.
3-32
Kenai Hydro found that 95 percent of salmon redds were concentrated within
Reaches 1 through 3 of Grant Creek (table 3-10). Sockeye and coho salmon spawned in
every accessible reach of Grant Creek, while Chinook only spawned in Reaches 1, 3, and
4. The spawning locations of sockeye and coho salmon often overlapped in several
locations in Reaches 1 and 3. Pink salmon only spawned in Reach 1. There was less
spawning in Reach 2 (15 percent), Reach 4 (4 percent), and Reach 5 (1 percent).
Spawning only occurred in a few locations in Reaches 4 and 5. The distribution of redds
closely followed the distribution of visual detections and was similar to the results from
mobile telemetry surveys.
Table 3-10. Number and proportion of redds counted in 2013 in each reach of Grant
Creek for pink, Chinook, sockeye, and coho salmon (Source: BioAnalysts,
Inc., 2014).
Reach Pink Chinook Sockeye Coho Total Proportion
1 2 4 144 18 168 0.433
2 0 0 52 7 59 0.152
3 0 1 102 38 141 0.363
4 0 1 7 7 15 0.039
5 0 0 3 2 5 0.013
Total 2 6 308 72 388 1.000
The majority of redds observed in Grant Creek in 2013 were located in riffle (71
percent) and pool (19 percent) habitat. The majority of redds were located in the main
channel along the stream margins or in areas protected from the main current. Chinook
were the exception, building redds mid-channel within the stronger current. Redds were
also observed in side channels and in backwater areas near the main channel where
suitable stream velocities and substrates were present.
In 2013, the resident rainbow trout migration period extended from May 24 to
June 29 and resulted in the capture of 13 adult rainbow trout, although this count may be
somewhat low because of deficiencies in the weir (undercut bank on the right bank and
high flows overtopping the weir). The migration period for Dolly Varden extended from
August 18 to September 14, 2013, with the capture of 14 Dolly Varden.
Kenai Hydro biologists used snorkeling and minnow traps to assess juvenile
species diversity, relative abundance, and distribution in Grant Creek. Dolly Varden and
rainbow trout were the most numerous fish captured in minnow traps, followed by
Chinook, sculpin species, and coho.
Also, Kenai Hydro used radio telemetry to assess habitat use in Grant Creek. The
majority of the 198 detections were in riffles and pools in the main channel (table 3-11).
3-33
Table 3-11. Habitat use by location based on mobile telemetry surveys for radio tagged
rainbow trout in Grant Creek, 2014 (Source: Kenai Hydro, 2018a).
Reach—Area Riffle Pool
Back-
Water
Step
Pool Glide
Pocket-
Water Total
1—Main stem 101 23 124
2—Main stem 13 19 8 40
3—Main stem 11 9 20
3—Predominant
side channel 5 3 8
3—Secondary
side channel 3 3
4—Main stem 1 1 1 3
Total 131 58 8 0 0 1 198
Trail Lake Narrows—Adult salmon, rainbow trout, and Dolly Varden occur in the
Trail Lakes Narrows area, which is also an upstream migration corridor for fish that
spawn in Grant Creek and all other tributaries of Upper Trail Lake. Likewise, this area is
also a downstream migration corridor for salmonid production upstream. Dolly Varden
and rainbow trout probably reside in the area to prey on juvenile salmon that migrate
through or rear in this area.
Kenai Hydro conducted fish sampling in 2013 at Trail Lake Narrows
(BioAnalysts, Inc., 2014). Juvenile Chinook and threespine sticklebacks were the most
numerous fish captured using minnow traps and beach seines, followed by coho, Dolly
Varden, sculpins, rainbow trout, and sockeye (table 3-12). The size of juvenile Chinook
and coho captured in minnow traps suggests that both age-0 and age-1+ fish were present
in Trail Lake Narrows. Dolly Varden varied in size from 57 to 184 millimeters with
several age classes represented. Salmon may spawn in Trail Lake Narrows because
Kenai Hydro biologists observed sockeye carcasses and depressions (likely redds) in
suitable spawning gravels in this area.
Table 3-12. Number, proportion, and catch-per-unit-effort of fish caught in Trail Lake
Narrows with minnow traps, July 2013 (Source: BioAnalysts, Inc., 2014).
Species Number Proportion
CPUE
(fish per hour)
Chinook 108 0.283 0.095
Dolly Varden 52 0.136 0.046
Coho 62 0.163 0.055
Rainbow trout 4 0.010 0.004
3-34
Species Number Proportion
CPUE
(fish per hour)
Sockeye 1 0.003 0.001
Sculpin sp. 38 0.100 0.034
Threespine stickleback 116 0.304 0.102
Grand Total 381 1.000 0.336
Note: CPUE – catch-per-unit-effort
Macroinvertebrates
The Arctic Environmental Information Data Center evaluated benthic
macroinvertebrates from Grant Lake in 1981 and 1982 (AEIDC, 1983). Samples
collected contained relatively few insects and showed little diversity. The most common
groups where midges, worms, and clams, which is typical for cold-water, glacier-fed
systems with narrow littoral zones.
In addition to the data collected in the early 1980s, Kenai Hydro conducted a
baseline study of macroinvertebrates and periphyton in Grant Creek in August 2013
(BioAnalysts, Inc., 2014). Biologists used a Serber sampler to collect benthic
macroinvertebrate and periphyton samples upstream of the Reach 1 distributary and at the
proposed detention pond outlet. Thirty-five macroinvertebrate taxa were identified in
Grant Creek, the most abundant of which were midges, followed by mayflies, stoneflies,
and clams.
Aquatic Habitat
Grant Lake—Grant Lake has a total surface area of 2.5 square miles and consists
of two basins connected by an isthmus and small island (see figure 1-1). The 3.5-mile-
long, 0.5-mile-wide upper basin has a maximum depth of 283 feet. The 1.5-mile-long,
0.5-mile-wide lower basin has a maximum depth of 262 feet. Ebasco (1984) studied
water surface elevations in Grant Lake and found the maximum lake elevation was 703
feet with a seasonal -5.3 foot elevation decrease. The Grant Lake shoreline littoral area is
predominantly bedrock or coarse, angular boulders. Six small glacial streams flow into
Grant Lake. Inlet Creek is the largest and is the lake’s only perennial tributary. Fish
habitat in these streams is extremely limited because of their steep gradient and
intermittent nature, but detailed fish habitat data have not been collected.
Grant Creek—Grant Creek, Grant Lake’s only outlet, is about 5,180 feet long and
flows west from Grant Lake to Trail Lake Narrows. It has a mean annual flow of 193 cfs,
with an average gradient of 207 feet per mile (3.6 percent slope). Cobble and boulder
alluvial deposits and gravel shoals are the dominate substrates (Ebasco, 1984). In its
upper half, Grant Creek passes through a rocky gorge with three substantial waterfalls all
of which are natural barriers to upstream fish migration (figure 3-5). In its lower half,
3-35
Grant Creek becomes a lower gradient stream, is less turbulent, and passes over gravel
shoals and diminishing boulder substrate.
Kenai Hydro delineated aquatic habitat and completed an instream flow study in
Grant Creek during summer 2014 (McMillen, 2014). Surveyors divided the creek into
six study reaches (see figure 2-1); however, mapping focused on Reaches 1 through 5
because Reach 6 is inaccessible to anadromous fish due to the presence of a natural
migration barrier (a 50-foot-high waterfall) at about river mile 0.8.
Figure 3-5. Grant Creek stream profile generated from light detection and
ranging (Source: Kenai Hydro, 2018a, as modified by staff).
Riffle habitats are predominant throughout all five reaches (50 percent), followed
by pools (19.3 percent) and cascades (15.3 percent) (tables 3-13 and 3-14). All of the
cascades are located in Reach 5. Pools are rare in the main stem of Grant Creek but are
occasionally found in its side channels and distributaries. Undercut banks provide cover
for fish in Reaches 1 and 4.
Large woody debris (LWD) is sparse in the main stem of Grant Creek but
relatively abundant in its side channels and distributaries (table 3-14). McMillen (2014)
concludes that high flows and velocities limit the amount of LWD in the system because
LWD collects in only a few places in the main channel. Most wood is found in the
distributary and the Reach 2/3 side channels, where flows are greatly reduced and
protected from the main discharges in Grant Creek, and is associated with the pool
mesohabitat.
3-36
Table 3-13. Mesohabitats found in Grant Creek (Source: McMillen, 2014).
Habitat Type
Total Area
(Sq. Ft)
Reach 1
Distrib-
utary
Reach 1
Mainstem
Reach 2
Backwater
Habitat
Reach 2
Mainstem
Reach 2
Secondary
Channel
Reach 3
Backwater
Habitat
Reach 3
Mainstem
Reach 3
Primary
Side
Channel
Reach 3
Secondary
Channel
Reach 4
Mainstem
Reach 5
Mainstem
Backwater 8,534 0 0 4,837 0 0 3,697 0 0 0 0 0
Cascade 33,707 0 0 0 0 114 0 0 0 0 0 33,593
Glide 3,202 0 0 0 1,613 0 0 0 0 1,588 0 0
Pocket
water 3,709 0 0 0 0 0 0 0 0 0 3,709 0
Pool 42,568 7,495 3,143 0 3,834 398 0 3,997 5,018 9,510 1,195 7,977
Rapid 511 0 0 0 0 0 0 0 511 0 0 0
Riffle 110,429 6,004 23,168 0 23,669 1,189 0 25,585 11,672 1,493 17,649 0
Run 576 0 0 0 0 0 0 0 0 576 0 0
Step Pool 16,858 0 0 0 0 0 0 0 0 0 0 16,858
Table 3-14. Aquatic habitats found in Grant Creek (Source: McMillen, 2014).
Habitat Type
Total Area
(Sq. Ft)
Reach 1
Distrib-
utary
Reach 1
Mainstem
Reach 2
Backwater
Habitat
Reach 2
Mainstem
Reach 2
Secondary
Channel
Reach 3
Backwater
Habitat
Reach 3
Mainstem
Reach 3
Primary
Side
Channel
Reach 3
Secondary
Channel
Reach 4
Mainstem
Reach 5
Mainstem
Margin 7,214 0 3,343 0 3,871 0 0 0 0 0 0 0
Overhead
Vegetation
10,096 302 0 0 0 0 0 0 2,455 7,339 0 0
UCB 12,187 1,513 3,372 0 2,193 0 0 278 110 1,214 3,216 0
LWD 17,750 3,556 1,894 0 187 0 0 1,142 1,611 6,218 3,040 0
3-37
As described in the amended final license application, salmonid spawning habitat
is relatively limited in Grant Creek and influences salmon productivity because of a lack
of suitable substrate (i.e., gravel and small cobble). The substrate that is present in the
creek is recruited from Reaches 5 and 6 and tends to be either broad and flat or angular
(Element Solutions, 2014). As a result, salmon spawning activity appears to be
opportunistic and driven by the presence of adequate spawning substrates, rather than by
water depths and velocities. Kenai Hydro observed that much of spawning in Grant
Creek occurs along its margins, where velocities and depths are lower, and spawning
substrates are perched on relatively flatter benches. However, redds that were
constructed along the stream margins at higher discharges were left dry and exposed on
these flat benches as flows decreased throughout the summer. This was particularly
noted for sockeye that were observed spawning at much higher flows than coho.
Significant side channel habitat exists in Grant Creek, notably in Reaches 2 and 3,
and Kenai Hydro observed coho and sockeye spawning activity in these side channels.
Reach 2 and 3 side channels are wetted at all flows, although low winter flows may result
in dry creek beds or freezing in the smaller side channels. The distributary in Reach 1
becomes wetted at a flow of about 190 cfs, while the overflow channel near the break
between Reaches 1 and 2 becomes wetted at a flow of about 450 cfs. There is most likely
a substantial, yet unquantified loss of production in these side channels because of
desiccation and freezing.
Trail Lake Narrows—As described above, Grant Creek enters Trail Lake Narrows,
which connects Upper Trail Lake to Lower Trail Lake. Riffles are the dominant habitat
type in the Trail Lake Narrows area from the confluence of Grant Creek to the
downstream end of a 0.5-acre island (figure 3-5). This area contains about 2,000 square
feet of juvenile rearing habitat, spawning habitat, and adult salmon staging habitat.
Essential Fish Habitat
EFH refers to those waters and substrate necessary for fish to spawn, breed, feed,
or grow to maturity and covers a species’ full life cycle (50 CFR 600.10). Per the
Catalog of Water Important for Spawning, Rearing or Migration of Anadromous
Fishes—Southcentral Region (Johnson and Blossom, 2017), Alaska DFG designated
EFH for 27 species of anadromous fish in Alaska. Freshwater EFH includes all those
streams, lakes, ponds, wetlands, and other water bodies currently or historically
accessible to anadromous fish in Alaska, except areas upstream of certain impassable
man-made barriers, and longstanding, impassable barriers (i.e., waterfalls in existence for
several hundred years).
Within the proposed project area, a series of waterfalls in Reach 6 of Grant Creek
block the upstream migration of anadromous fish. Consequently, no designated EFH
occurs in Grant Lake. Grant Creek below the waterfalls is designated as EFH for
Chinook, coho, pink, and sockeye salmon because it contains suitable spawning and
rearing habitat accessible to these species.
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3.3.2.2 Environmental Effects
Water Quantity
Effects of Project Construction on Water Quantity
During construction of the proposed project, Kenai Hydro does not expect adverse
effects on the streamflows and water levels of existing surface water resources (i.e., Grant
Lake and Grant Creek). Kenai Hydro notes that construction of the proposed penstock
may require some near-shore cofferdams, but any localized dewatering would be returned
to Grant Lake.
To minimize potential for dewatering during construction activities, Kenai Hydro
would install the proposed streamflow and water level monitoring equipment during
project construction and would monitor water levels and streamflows for the duration of
construction. To monitor effects on Grant Lake water levels, Kenai Hydro would install
station IT-1 at the proposed project intake. Kenai Hydro’s proposed ISF-1 monitoring
location would record outflow from Grant Lake into Grant Creek at the bypass weir, and
station ST-2 (GC200)45 would monitor flows in Grant Creek downstream of the project
tailrace. In addition, Kenai Hydro proposes to employ a third-party ECM to remain on
site for the duration of construction. As proposed, the ECM would document Kenai
Hydro’s compliance with conditions of the license and prepare annual compliance reports
that would be filed with the Commission and other requesting agencies.
Kenai Hydro’s proposal to hire an ECM to oversee streamflow and water level
monitoring during project construction is consistent with Forest Service final 4(e)
condition 20. However, this condition specifies that the ECM have the authority to stop
work or issue change orders in the field if conditions warrant.
Our Analysis
Grant Lake—Construction related to the applicant’s proposal could temporarily
change local hydrology and water quantity levels near the proposed intake structure,
concrete weir (i.e., outlet to Grant Creek), and penstock. Construction of the penstock
could require construction of near shore cofferdams. However, Kenai Hydro would
pump water from inside the coffer dams back into Grant Lake and conveyed downstream.
Construction of the bypass weir is discussed below under Grant Creek. Kenai Hydro’s
proposal to monitor water levels near construction areas, and limit construction to
appropriate timing for in-water activities are appropriate to ensure construction of the
project is completed as required.
Given the remote nature of the project, having an ECM on site to monitor project
construction activities and ensure Kenai Hydro’s proposed measures effectively protect
environmental resources is appropriate. Requirements of the proposed ECM (e.g.,
45 ST-2 is the same location as Kenai Hydro’s station GC200.
3-39
ensuring construction activities are in compliance with license requirements) would
adequately address water quantity-related issues related to the construction of the
proposed project features. Kenai Hydro’s proposal to install and operate water level
monitoring equipment prior to any construction activities would provide the ECM with
baseline water levels in Grant Lake to compare to any changes that result from project
construction. Both monitoring mechanisms (i.e., onsite ECM and water level monitoring
equipment) would minimize project construction effects on the portions of Grant Lake
affected during the proposed construction period. Therefore, we expect limited and
short-duration effects on water quantity and water levels in the portions of Grant Lake
affected by project construction.
Grant Creek—Construction related to the applicant’s proposal could change local
hydrology and water quantity levels in Grant Creek downstream of the proposed bypass
weir. Kenai Hydro’s final construction plans would detail the timing of weir construction
and Kenai Hydro would consult with Alaska DFG to schedule any in-water work.
Therefore, construction of the bypass weir would have minimal effect on water quantity
in Grant Creek.
Requirements of the ECM as proposed by Kenai Hydro would address water
quantity-related issues related to the construction of the proposed project features. Kenai
Hydro’s proposal to install and operate streamflow monitoring equipment prior to any
construction activities would provide the ECM with baseline streamflows in Grant Creek
to compare to any changes that result from project construction. Both measures would
minimize project construction effects on Grant Creek. We expect limited and short-term
effects on water quantity and streamflows in the portions of Grant Creek affected by
project construction.
Effects of Project Operation on Water Quantity
Kenai Hydro does not expect operation of the proposed project to adversely affect
streamflows and water levels of existing surface water resources. Kenai Hydro proposes
to annually vary Grant Lake water levels by up to 13 feet and operate the project from the
natural Grant Lake outlet elevation of 703 feet down to a minimum lake elevation of 690
feet. The lake would be drawn down in the winter months using a combination of Grant
Creek inflows and stored water to provide for project generation and meet the minimum
instream flows in the bypassed reach. Figure 3-6 compares current water surface
elevations with the anticipated lake elevation fluctuation. Kenai Hydro does not expect
operation of the project to affect the natural ice processes (e.g., freeze up and breakup) of
Grant Lake.
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Figure 3-6. Current and with project average Grant Lake water surface elevation (Source: Kenai Hydro, 2018a, as
modified by staff).
690
692
694
696
698
700
702
704
Jan Feb Mar Apr May Jun Jul Aug Sept Oct Nov DecWater Surface Elevation (feet)Current Water Surface Elevation With Project Water Surface ElevationCurrent Mean Water Surface Elevation
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Kenai Hydro notes that water diverted or spilled from Grant Lake would follow
one of three outflow route options:
1. Waters to be used for typical power production would be conveyed to the
powerhouse via an intake, tunnel, and penstock along the southeastern bank of
Grant Creek. The powerhouse would return all water to the reach of Grant
Creek below the powerhouse. Flow used for power production could also be
routed to Kenai Hydro’s proposed detention pond, a storage reservoir for flows
generated when the proposed unit’s spinning reserve capacity would be used.
Spinning reserve capacity for the proposed project would be primarily
available in the winter when Grant Lake inflows are low. If the transmission
grid were to require an immediate power input from spinning reserve, the
powerhouse would ramp up to full output with the increased flow routed to the
detention pond to capture the increased discharge. The flow diversion would
be accomplished with a gated diversion structure in the powerhouse tailrace.
All additional flow captured in the detention pond would then be released over
time back to the tailrace (i.e., reach of Grant Creek immediately below the
powerhouse). Kenai Hydro notes that the controlled release would ensure that
downstream flow and stage conditions were maintained.
2. The second flow route would divert Grant Lake water via a bypass pipe to a
weir located at the outlet of Grant Lake that would serve as the source for
bypass flow volumes in the bypassed reach. Bypass flows (i.e., Kenai Hydro’s
proposed minimum flows) would progress down the bypassed reach before
converging with the waters released below the project powerhouse.
3. The third routing option would occur when lake storage is full and inflows to
Grant Lake exceed the powerhouse capacity of 385 cfs. Under these
conditions, any flow above the capacity of the project would be spilled over the
bypass weir and be conveyed the entire length of Grant Creek.
In addition to the routing options above, Kenai Hydro would provide failsafe
provisions (i.e., bypass weir pump system) during project operation to ensure that flows
were provided continuously to Grant Creek during maintenance periods and any
emergency project shutdowns or unexpected outages.
Kenai Hydro proposes to address effects (i.e., reduced streamflows in the Grant
Creek bypassed reach and greater water level fluctuations within Grant Lake) associated
with project operation through implementation of measures (e.g., water level and flow
monitoring) described in its Operation Compliance Monitoring Plan.
To ensure water surface elevations remain between Kenai Hydro’s proposed
operating range (703 feet to 690 feet), Kenai Hydro proposes to install water level
monitoring equipment (RL-1) at the proposed intake structure. In addition to monitoring
Grant Lake water levels, Kenai Hydro would monitor flows exiting Grant Lake at two
locations—at the proposed intake structure (ISF-1) and at the proposed bypass weir
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(ISF-3). The intake structure monitoring equipment would be used to monitor the
quantity of water diverted for power production and the bypass weir monitoring
equipment would ensure compliance with any required bypassed reach minimum flows.
To monitor project outflows and determine compliance with the proposed minimum
flows downstream of the powerhouse, Kenai Hydro would continue to monitor flow at
their existing streamflow gage (ISF-2) in Grant Creek, located at the same location as
U.S. Geological Survey (USGS) gage 15246000 (Grant Creek near Moose Pass, Alaska),
which was operational from 1947 through 1958.46 Kenai Hydro proposes to operate and
maintain these monitoring devices for the duration of the license term.
Alaska DFG (10(j) recommendation 5), NMFS (10(j) recommendation 5), and
FWS (10(j) recommendation 5) recommend that 1 month before the start of any land-
disturbing or land-clearing activities, Kenai Hydro develop and implement a stream
monitoring plan to monitor flows in the bypassed reach and flows in Grant Creek below
the project tailrace. The plan would include: (1) methods of measuring and recording
bypass flows, instream minimum flows downstream of the project tailrace, channel
maintenance flows, and project ramping rates; (2) a schedule for establishing the gage
downstream of the tailrace and operating the gage for the remainder of the license;
(3) provisions to disseminate flow data to the Commission, resource agencies, and public;
and (4) specify that the installed stream gages conform to USGS stream gage standards.
Specifically, the commenting agencies recommend that Kenai Hydro monitor flows in the
following locations: (1) in the bypassed reach through the bypass system or a stream
gage within the bypassed reach, (2) downstream of the project tailrace at the location that
was used by USGS for stream gage no. 15246000, (3) ramping rates at the existing
downstream gage location, and (4) channel maintenance flows in the bypassed reach or at
the existing downstream gage location. In its response to agency terms and conditions,
Kenai Hydro agreed to develop a stream monitoring plan as recommended by Alaska
DFG, NMFS, and FWS. NMFS 10(j) recommendation 5 also includes installation of a
stilling well at the downstream gage to accurately measure changes in stage and
recommends Kenai Hydro provide flow information on a website accessible to NMFS
and project stakeholders. Kenai Hydro agrees with the commenting agencies to monitor
flows in the following locations: (1) in the bypassed reach via the bypass system,
(2) instream flows downstream of the project tailrace at Kenai Hydro’s existing
streamflow gage located at the location that was used by USGS for stream gage no.
15246000, and (3) channel maintenance flows at the existing gage downstream of the
project tailrace. However, while committed to measuring project ramping rates, Kenai
Hydro would measure and confirm ramping rates at the project powerhouse/tailrace
interface as opposed to the existing Grant Creek stream gage.
46 Kenai Hydro maintains a USGS-approved stage recorder at this location,
previously installed during the 2013 licensing studies.
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Alaska DFG 10(j) recommendation 6 and FWS 10(j) recommendation 6
recommend the operations and compliance plan include provisions to ensure flow
releases are provided continuously to the bypassed reach and downstream of the tailrace
at all times including during any routine maintenance, emergency project shutdowns, or
unanticipated interruptions to power generation.
FWS 10(j) recommendation 21 recommends the operations plan include process
provisions for how any determined need for operational changes would be incorporated
into the project operation.
Our Analysis
Grant Lake—The project as proposed would result in changes to the current
timing, magnitude, and duration of water surface elevation fluctuations in Grant Lake.
Currently, water levels fluctuate within Grant Lake between 703 feet and 690 feet, with
water surface elevations typically fluctuating between 703 feet and 698 feet. The greatest
inter-monthly changes occur during ice breakup and snowmelt from late March through
late June, with an average lake elevation increase of 0.8 feet per month. Maximum lake
elevations were observed in July, with decreasing water levels averaging 0.33 feet per
month in the fall and winter (Ebasco, 1984). While project operation would not result in
Grant Lake water surface elevation fluctuations outside the existing range (i.e., 703 feet
to 690 feet), based on figure 3-6, Kenai Hydro’s proposed project operation would result
in greater inter-monthly water surface elevation changes. Table 3-15 shows the average
change in Grant Lake water surface elevations per month for a typical operation cycle.
Table 3-15. Average inter-monthly Grant Lake water surface elevation change (Source:
Kenai Hydro, 2018a; Ebasco, 1984; as modified by staff).
Period
Water Surface Elevation Change (+/-) per Month
Existing Conditions
(feet)
With Project in Place
(feet)
January–May + 0.8 –1.6
June–August + 4.2
September–October –0.33 0
November–December –2
Changes to the current water surface elevation fluctuations could also affect the
natural ice processes of Grant Lake. Because proposed operation would likely result in a
gradual drawdown of Grant Lake during the winter, we do not expect the operation of the
proposed project to change the current timing of ice cover on Grant Lake (i.e., ice
formation in winter and ice breakup in the spring), but the expected lower than current
water surface elevations during the winter could influence the structure of near-shore ice
cover. As ice on the lake subsides, near shore ice would fracture and refreeze. Kenai
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Hydro’s proposal to operate the project for spinning reserve could result in localized ice
cover modification. Because the spinning reserve capacity for the proposed project
would be primarily available in the winter when Grant Lake inflows were low and ice
cover was high, the quick withdraw of water from Grant Lake (one turbine would divert
the full 192.5 cfs of flow into the detention pond with a total volume of 173,250 cubic
feet (about 4 acre-feet) discharged during a 15-minute period) could result in minor
localized ice cover subsidence in the area immediately around the project intake.
Kenai Hydro’s proposed modes of project operation (i.e., block loading and level
control) require accurate water level monitoring in Grant Lake for Kenai Hydro to
adequately balance the competing water needs (e.g., power production, minimum
instream flows, and surface water recreation) of the project. Kenai Hydro’s water surface
elevation monitoring equipment (RL-1) proposed in its Operation Compliance
Monitoring Plan would appropriately serve as a mechanism to monitor the effects of
project operation on Grant Lake an ensure compliance with potential license conditions
(e.g., reservoir maximum and minimum water surface levels). The proposed plan would
also include provisions to ensure flow releases are provided continuously to the bypassed
reach and downstream of the tailrace at all times, consistent with Alaska DFG and FWS
10(j) recommendations.
Grant Creek—Project operation would alter the existing timing, magnitude, and
duration of streamflows along the entire length of Grant Creek. Operation of the
proposed project would reduce the amount of glacial melt water released from Grant
Lake into Grant Creek. Under Kenai Hydro’s proposal, flows in the bypassed reach
(i.e., Reaches 5 and 6) would be reduced from current conditions to the agreed upon
minimum instream flows plus accretion flows from groundwater, surface runoff, and
minor tributary contributions. Downstream of the project tailrace (i.e., Reaches 1 through
4), winter base flows in Grant Creek during November through May would be higher
than current conditions under with-project conditions. When Grant Lake is either at its
minimum water surface level (i.e., May to early June) or full water level (i.e., late July
through October), project outflows would approximate inflows and we expect no effect
on the flow and water levels of Grant Creek. When Kenai Hydro is allowing Grant Lake
to refill, flows in Grant Creek would be lower than current conditions under with-project
conditions from early June until late July. High flow magnitudes (i.e., flood flows)
during storm events would also be reduced throughout Grant Creek. Figure 3-7 presents
flow hydrographs from 2013 for the reaches of Grant Creek below the project tailrace for
current conditions and with-project conditions for flow.
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Figure 3-7. Grant Creek flows downstream of the proposed powerhouse for current conditions and conditions with the
project in place (2013) (Source: Kenai Hydro, 2017d, as modified by staff).
3-46
Kenai Hydro’s proposal to use the project for spinning reserve could also affect
the timing, magnitude, and duration of flows in the portion of Grant Creek below the
powerhouse. During typical operation, the detention pond would be kept dry and used
only in rare instances when the spinning reserve capacity of the project was needed.
Kenai Hydro notes that when a turbine is brought online for spinning reserve, the turbine
would operate for an average period of 15 to 20 minutes to meet the instantaneous
demand. Assuming one turbine was allocated to spinning reserve, the turbine would
divert the full 192.5 cfs of flow into the detention pond with a total volume of 173,250
cubic feet (about 4 acre-feet) discharged during a 15-minute period.
Because Kenai Hydro’s proposed project would alter streamflows in Grant Creek,
project operation would require accurate streamflow monitoring for Kenai Hydro to
adequately balance the competing water needs of the project. Kenai Hydro’s streamflow
monitoring equipment (e.g., ISF-1, ISF-2, and ISF-3) proposed in its Operation
Compliance Monitoring Plan and its commitment to develop a stream monitoring plan, as
recommended by Alaska DFG, FWS, and NMFS, would appropriately serve as
mechanisms to monitor the effects of project operation on Grant Creek and ensure
compliance with potential license conditions (e.g., minimum flows and channel
maintenance flows).
Specifically, flow monitoring equipment placed at the proposed project intake
(ISF-1) would allow Kenai Hydro to operate the project in a level control operating mode
where outflow is balanced to inflow. Kenai Hydro’s proposed ISF-3 streamflow
recording location would consist of flow recording equipment through the bypass system
within the bypass weir. This system, developed in consultation with the appropriate
resource agencies, would allow Kenai Hydro to record flows entering the bypassed reach
of Grant Creek and ensure adopted minimum flows were being met. Kenai Hydro’s
existing ISF-2 streamflow gage is appropriately located to record streamflows in the
portion of Grant Creek below project influence. This location allows Kenai Hydro to
ensure the adopted minimum flows of lower Grant Creek were being met. Adding a
stilling well at this gage, as NMFS recommends, would reduce splashing and increase
accuracy of stage readings. Kenai Hydro’s agreement to consult with Alaska DFG,
NMFS, and FWS on the proposed streamflow monitoring plan would provide a
reasonable balance of input regarding appropriate measuring and recording methods.
Regarding FWS’s recommendation that the plan include process provisions for
how any determined need for operational changes would be incorporated into the project
operation, Kenai Hydro would consult with agencies during preparation of the annual
operations report, and issues concerning potential need for changes in operations would
occur through the Commission’s report approval and standard license modification
processes.
A web-based, real-time monitoring of flow levels, as NMFS recommends, would
allow the Commission and the agencies to determine project flows in the bypass reach
and below the tailrace at any time, but this data is not needed to ensure the compliance
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with license requirements because the OCMP discussed earlier would ensure oversight of
the project operations. Moreover, the OCMP would clarify definitions of all operations
and conditions during which deviations from normal operations would be allowed and
these clarifications would reduce confusion and ensure compliance with license
requirements.
Modifying Kenai Hydro’s Operation Compliance Monitoring Plan to include the
measures presented in the commenting agencies stream monitoring plan with specific
measures for flow monitoring in the bypassed reach and downstream of the project
tailrace, would minimize operational effects on flows and water levels in Grant Creek.
Modifying Kenai Hydro’s Operation Compliance Monitoring Plan to include the agency
proposed stream monitoring plan would consolidate all project operation requirements
and provide the appropriate reporting procedures to efficiently document compliance of
project operation with flow requirements.
Water Quality
Effects of Project Construction on Water Quality
Project construction could result in a number of direct and indirect effects on
water quality within Grant Lake and in the affected reaches of Grant Creek. Use of
heavy equipment for excavation and ingress/egress access during construction would
disturb areas near proposed project facilities, potentially adding sediment to and
increasing turbidity in Grant Lake. Construction of a cofferdam and subsequent removal
may also lead to short-term increases in turbidity. In addition to ground-disturbing
activities, heavy equipment would require use and storage of hazardous materials (e.g.,
fuel, oil, hydraulic fluids), which could degrade water quality if they came in contact with
the aquatic environment.
Following issuance of a license, Kenai Hydro proposes to develop a series of
monitoring and management plans to ensure that construction and operation of the project
do not change or adversely affect water quality in Grant Lake or Grant Creek. These
plans include an erosion sediment control plan, and, consistent with NMFS 10(j)
recommendation 11, a hazardous materials containment/fuel storage plan, and a spill
prevention control and containment plan. Kenai Hydro proposes to develop these plans
in advance of construction activities and provide stakeholders with an agreed upon
review and comment period prior to finalizing and filing with the Commission.
Kenai Hydro proposes, consistent with Forest Service final 4(e) condition 20, to
provide a third-party ECM to oversee the project during major construction activities
(e.g., vegetative- or land-disturbing, spoil producing, blasting activities). In addition,
Forest Service final 4(e) condition 20 specifies that the ECM must have the authority to
stop work or issue change orders in the field if conditions warrant and provide a liaison
between the Forest Service and Kenai Hydro. The ECM would manage regulatory
monitoring and compliance activities throughout construction. In its reply comments,
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Kenai Hydro states its ECM would meet with all requisite qualifications and expertise
needed to monitor all major construction activities.
FWS (10(j) recommendation 16) and Alaska DFG (10(j) recommendation 15)
recommend Kenai Hydro combine measures to address hazardous materials; fuel storage;
and spill prevention, control and containment into a single plan. FWS and Alaska DFG
recommend the plan include the following protective measures, applicable to both
construction and project operation:
• designation of specific areas for maintenance and refueling of vehicles and
equipment;
• contingencies with appropriate measures for containment and cleanup in the
event of a spill or accident; and
• provisions to remove oil and other contaminants from condensate and
leakage from the turbines and other equipment in the powerhouse.
In response to Agency recommendations, Kenai Hydro states it would combine the
hazardous materials containment/fuel storage plan, and spill prevention control and
containment plans. Kenai Hydro states it is committed to the collaborative development
of a plan (or set of plans) that describes methods it would implement to minimize any
impacts associated with the handling and/or use of hazardous substances, but does not
specifically adopt the agency recommended measures.
Kenai Hydro proposes to conduct construction work per measures to be described
in the ESCP. However, Kenai Hydro does not describe specific measures it would
include in the plan. As discussed in section 3.3.1.2, Construction Effects on Geology and
Soils, Forest Service provided specific measures it recommends Kenai Hydro include in
its ESCP. Kenai Hydro also proposes to develop a construction stormwater pollution
prevention plan to prevent stormwater runoff in construction areas from entering Grant
Creek and Grant Lake.
Alaska DFG (10(j) recommendation 14) and FWS (10(j) recommendation 15)
recommend the ECM monitor turbidity during construction both upstream of and 100 feet
downstream of all construction activities and/or discharge points for overland flows that
cross construction areas and discharge into Grant Creek. Both agencies recommend that,
if turbidity 100 feet downstream of the construction area exceeds Alaska water quality
standards, Kenai Hydro would stop related construction activities immediately, locate
sediment sources, and implement appropriate sediment control measures. Additionally,
FWS 10(j) comment 15 recommends Kenai Hydro conduct turbidity monitoring at 15-
minute intervals at the stream gage downstream of the tailrace. Kenai Hydro states its
intent to adhere to these requirements if they are conditions of a license.
Section 3.3.2.1 notes that Kenai Hydro measured lead concentrations in excess of
the calculated freshwater chronic standard of 0.84 µg/l on two occasions in June 2009—
one at Grant Creek at Site GC200 and the other at Grant Lake at Site GLTS at a depth of
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10 meters. These values suggest that disturbing Grant Lake sediments during
construction could mobilize lead, if present, and result in downstream transport in
Grant Creek.
Our Analysis
Implementing an ESCP, as Forest Service specifies and as further discussed above
in section 3.3.1.2, Construction Effects on Geology and Soils, would reduce potential
effects of sediment erosion during construction on water quality in Grant Lake, Grant
Creek, and Trail Lake Narrows.
Developing a hazardous material plan, as Alaska DFG and FWS recommends, to
include specific areas for the maintenance and refueling of vehicles and equipment;
contingencies with appropriate measures for containment and cleanup in the event of a
spill or accident; and provisions to remove oil and other contaminants from condensate
and leakage from the turbines and other equipment in the powerhouse would provide
additional detail to better describe proposed measures and strengthen the plan. In
addition, reporting observations of oily sheens and turbidity plumes on surface waters
would also document potential fuel and oil spills and major erosion events, e.g.,
cofferdam construction and removal. Such reporting observations would identify the
potential any need for additional containment measures.
Combining measures for hazardous material storage, spill containment, and spill
prevention into a single plan, as Kenai Hydro proposes, and consistent with FWS and
Alaska DFG recommendations would provide a single guidance and reference document
for the construction contractor, ECM, and state permitting agencies as needed. A
hazardous materials plan that includes: (1) specific areas for the maintenance and
refueling of vehicles and equipment, (2) contingencies with appropriate measures for
containment and cleanup in the event of a spill or accident, (3) provisions to remove oil
and other contaminants from condensate and leakage from the turbines and other
equipment in the powerhouse, and (4) reporting requirements to minimize project
construction effects on water quality. Combining fuel storage, spill prevention/control,
and containment plans into a single document would simplify agency consultation, the
Commission’s plan approval process, and compliance reporting.
Because of the remote nature of the proposed project, providing onsite monitoring
by a third-party ECM with authority to stop work would assist in the detection of spills or
erosion and allow for corrective measures to be quickly identified and implemented.
Regarding turbidity monitoring during construction, requiring Kenai Hydro
through the ECM to monitor turbidity both upstream and 100 foot downstream of all
activities and/or discharge points for overland flows that cross construction areas and
discharge into Grant Creek would provide a means for detecting any erosion or
sedimentation caused by the project. If turbidity measurements indicate a construction-
related effect, the ECM could issue a stop work order to the construction contractor and
work with the contractor to implement corrective measures. Therefore, additional
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monitoring at the stream gaging site on Grant Creek, per FWS 10(j) recommendation 15,
would be unnecessary.
Adding pre-construction lead sampling to the ESCP would complement existing
BMPs focused on turbidity. Sampling and analysis of lead prior to construction would:
(1) characterize sediment lead concentrations from the standpoint of a threat to aquatic
resources; (2) inform an assessment of the likelihood of release to the Grant Lake water
column and downstream to Grant Creek, during construction; and (3) support a plan to
avoid release of lead from disturbed sediments, if present.
Measuring sediment lead concentrations in areas where construction would disturb
lake sediments, e.g., in the area of the proposed cofferdam, would be an appropriate
means of assessing potential risks of mobilizing sediment bound lead. The U.S. Army
Corps of Engineers developed screening values for characterizing levels of concern for
lead to benthic communities: SL1, below which adverse effects would not be expected,
is 360 milligrams per kilogram (mg/kg), and SL2, above which more than minor adverse
effects may be observed, is >1300 mg/kg (Northwest Regional Sediment Evaluation
Team 2018). Use of these screening levels would provide valuable comparisons and help
assess risk of construction-related increases in lead concentrations.
If measured values exceed established screening level thresholds, capping
sediments that may be disturbed during construction would minimize the potential for
lead mobilization. Suitable materials for in situ caps include clean sand or a
combination of sand and gravel (EPA, 2005). Placement of the cap following
construction and prior to the removal of the proposed coffer dam, would be an effective
means of preventing interaction between the water sediment interface, reducing the
likelihood of release of lead to the water column.
Effects of Project Operation on Water Quality
Below, we identify the potential effects of operation of the proposed project on
water quality in Grant Lake and Grant Creek, focusing primarily on changes to Grant
Lake water surface elevations. In the Our Analysis section that follows, we discuss
whether these effects would occur at the project. Due to complexities associated with
proposed and recommended water temperature measures, we address temperature issues
below other water quality parameters.
Grant Lake—Proposed drafting and refilling of Grant Lake could cause erosion of
shoreline sediments, and, if present, leach or mobilize sediment bound metals. Winter
drawdown could also reduce DO levels in Grant Lake and expose previously submerged
littoral substrates to temperatures below 0°C, freezing the substrate and the associated
benthic invertebrate community (Carmignani and Roy, 2017). Additionally, reduced
Grant Lake elevations could expose a shallow rock ledge, isolating the two basins. As
discussed in Ebasco (1984), the southern of the two channels in the ledge could act as a
dam if the level of Grant Lake were lowered sufficiently during operation of the project.
Per Ebasco, the controlling ledge of rock occurs at an elevation of about 685 feet.
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Kenai Hydro’s proposal to operate the project for spinning reserve could result in
more rapid, but short-term, changes in lake levels. Such changes would occur during the
winter within the descending portion of the operational rule curve.
Shifting the majority of flow volume leaving Grant Lake from the natural outlet to
the proposed intake structure could affect stratification patterns, and therefore lake
trophic status. In addition, proposed drawdown in the winter and spring and refilling of
Grant Lake during the summer could affect the Grant Lake thermal regime. Currents
associated with the project intake could also mobilize sediment near the lake bottom,
entraining sediment-bound lead, if lead is present in this location.
Our Analysis
Changes to Grant Lake elevations would occur following construction of the
project. As shown in figure 3-6, Grant Lake water levels would decline from January
through May with surface elevations ranging from about 698 feet to 690 feet. During
these months, project operation would expose shoreline areas that are submerged under
existing conditions. Lake levels would rise from May through July, leveling out in
August at elevation 702 feet. Grant Lake elevations from August through December (702
to 700 feet) would be about 2 feet higher than current elevations. However, project
operation would not change the existing maximum lake elevation (703 feet); hence, there
would be no potential for newly inundated shoreline areas.
The volume and area of Grant Lake would also be reduced during the
winter/spring drawdown. At minimum pool, the Grant Lake volume would decrease by
approximately 11,564 acre-feet, a reduction of 4.6 percent to 241,329 acre-feet. The lake
area would be reduced by a maximum of 61 acres at minimum pool, or about 4 percent to
1,642 acres. In contrast to existing conditions, the annual average volume and lake area
would change less than 0.5 percent. The maximum change in the ratio of lake volume to
area would be 1 percent, and the annual average lake volume to area ratio would be
unchanged.
Exposure and/or inundation of shoreline sediments based on the proposed rule
curve could increase shoreline erosion in contrast to existing conditions. However, the
shoreline littoral area is predominantly bedrock or coarse, angular boulders with a low
susceptibility to erosion (Kenai Hydro, 2016). In a USGS analysis of trace metals
transport in the Sacramento River, including lead and mercury, Taylor et al. (2011) found
that nearly 100 percent of measured lead transported between Shasta Dam and Freeport
occurred as colloids—bound to extremely small clay sized particles with grain size
between about 0.005 and 1.0 micrometer. In addition to small particle size, organic
material is also a key factor in determining metal distribution and mobility (Baran and
Tarnawski, 2015). As discussed in the Affected Environment section, results of low-level
mercury analyses were less than the Alaska DEC chronic standard of 0.77 μg/L during all
sampling events. A single measurement of lead at Grant Lake, in June 2009, exceeded
the calculated chronic standard of 0.84 μg/L:1.1 µg/l at GLTS at a depth of 10 meters.
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Because of the nature of the Grant Lake shoreline, the lack of organic materials
(wetlands or other vegetation) that would be affected by lake level fluctuation, and the
unlikely presence of elevated metals, particularly in an oxidized environment, we find
that heavy metal leaching resulting from water level fluctuations would be unlikely in
Grant Lake or the surrounding shoreline. However, velocities near the intake could
entrain lake sediments, and, if present, project operations could transport sediment-bound
lead downstream to Grant Creek. Analysis of sediment lead concentrations, sediment
grain size near the proposed intake, anticipated current velocities associated with the
intake, and the likelihood of sediment entrainment would determine whether project
operations could result in lead mobilization that would affect aquatic resources. If this
analysis indicates adverse effects would occur, implementing measures to prevent
sediment mobilization would minimize these effects.
Reduction in DO levels during winter drawdowns has been documented in
experiments on shield lakes in the Northwest Territories. Drawdown volumes as low as
10 percent of the total lake volumes reduced DO levels to an extent deemed slightly
greater than would occur naturally under heavy snow cover (Cott et al., 2008). However,
these were small (<70-acre) lakes, in contrast to a much larger, well oxygenated Grant
Lake (1,741 acres). Leppi et al. (2016) found low DO regimes in Alaskan lakes were
most typical of shallow lakes with large littoral areas and macrophyte development, while
lakes that had high DO regimes had limited littoral areas and deeper water.
Minor increases in turbidity associated with the proposed changes in lake levels
may occur; however, the large particle size of shoreline substrates and low erodibility
reduce the likelihood of increased turbidity during drawdowns or filling, or during short-
term spinning reserve/peaking operations that would primarily occur during the winter.
Bedrock and coarse angular boulders in the shoreline area would be expected to limit
habitat for, and thus impacts on, benthic macroinvertebrates.
Other changes in water quality/water chemistry are not expected as a result of
proposed changes in lake levels. In a simulation of lake level fluctuation for power
production, Turner et al. (2005) experimentally conducted winter drawdowns and
summer refilling in Lake 226 of the Experimental Lakes Area in northwestern Ontario.
Drawdowns of 2‒3 meters were conducted over three successive winters. Nitrogen and
phosphorus concentrations as well as phytoplankton biomass, species assemblages,
productivity, and nutrient status were largely unaffected.
Reduced lake levels could expose a rock ledge between upper and lower Grant
Lake, isolating the two basins. Because of the proposed operational rule curve, the
minimum lake level, reached in May, would be 690 feet, about 5 feet higher than the
level of the rock ledge between the two basins. Kenai Hydro’s proposed operation would
therefore maintain continuity between the two basins.
Shifting the majority of outflow volume from the natural outlet to the proposed
intake structure is not expected to alter stratification patterns or change the lake thermal
regime because of the proposed surface level withdrawals from the Grant Lake intake
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structure (0.5 or 1.5 meter depths). In addition, the combination of proposed flows from
Grant Lake to the powerhouse and bypassed reach would not change average annual
discharge, thus we would expect no change in residence time, lake trophic status, or
nutrient availability in contrast to current conditions. Further, in contrast to a
hypolimnetic withdrawal that would act to remove cool water and expand the warmer
epilimnion, we do not expect the proposed surface withdrawal to affect the existing Grant
Lake thermal regime.
Maximum drawdown of Grant Lake (698 to 690 feet) would reduce its elevation
by about 1 percent from January to May and its surface area by approximately 4 percent
(1,704 acres to 1,642 acres based on figure B.3-5 in Kenai Hydro’s amended final license
application). Over the same period, operations would reduce lake volume by about
11,564 ac-ft, or 5 percent. Lake volume in June and July would be about 3 percent and
1 percent, respectively, of normal (pre-project) volume, and through the remainder of the
ice-free season lake volume would be slightly higher than pre-project conditions.
Because the largest decrease in lake volume would occur during the winter, colder
air temperatures at this time could result in cooler than pre-project temperatures in
shallow, littoral areas of Grant Lake. However, as noted above, bedrock and coarse
angular boulders in the shoreline area would be expected to limit habitat for, and thus
impacts on, benthic macroinvertebrates.
Substantial changes in lake water temperature with respect to either night time
cooling or day time warming would not be expected during ice-free conditions because of
the relatively small changes in lake volume and surface area noted above. A simulated
drawdown of Grant Lake from elevation 698 to 690 feet is shown in figure 3-34.
Grant Creek and Trail Lake Narrows—Reduced bypassed reach flows could also
alter nutrient transport and biological processes within this reach (see discussion in
section 3.3.2.2). Increased powerhouse flows under spinning reserve operations could
increase turbidity or alter patterns of macroinvertebrate drift. Depending on local
geology and geochemistry, downstream changes to DO, pH, specific conductance,
alkalinity, metals, or other water quality constituents are a concern in any project that
alters flow to downstream reaches. Solid waste or waste water generated at the project
could also enter Grant Creek and affect water quality.
Kenai Hydro proposes to construct a sanitary waste holding tank or septic system
to ensure proper treatment of solid waste and wastewater. Forest Service final 4(e)
condition 19 specifies Kenai Hydro prepare a solid waste and wastewater plan.
Our Analysis
Spinning reserve operations would be subject to ramping rate restrictions,
reducing the likelihood of increased turbidity or velocity that may otherwise effect
macroinvertebrate drift. Other water quality changes to Grant Creek, Trail Lake
Narrows, or Lower Trail Lake are unlikely because of proposed minimum flows, and the
proposed surface level withdrawal from Grant Lake, mimicking the natural outlet.
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Changes in elevations of Grant Lake would be would be unlikely to cause downstream
changes in DO, pH, nutrients, specific conductance, alkalinity, metals, or other water
quality constituents.
Lead concentrations in excess of the chronic standard were found in 2009 at Sites
GC200 and GLTS in Grant Lake (10 meters). Sources of lead in Grant Creek and Grant
Lake are unknown; anthropogenic contributions typically include gasoline-powered boat
engines, agriculture, and mining (Orejuela, 2014). Mining has occurred in the Grant
Lake Watershed, including recent approval by the Forest Service (Seward Ranger
District) of a mining plan for operating the White Rock Mine on the north side of Grant
Lake. The Forest Service’s 2015 Environmental Assessment concludes that operation
approved under the plan would have no direct, indirect, or cumulative effects on fish or
the aquatic environment (Forest Service, 2015).
Proposed project operation would not contribute metals (or other contaminants),
and as discussed relative to changing lake levels, elevation of non-project-related lead or
other metals, if present, is unlikely in Grant Lake, Grant Creek, Trail Lake Narrows, or
Lower Trail Lake.
Kenai Hydro’s proposed construction of a holding tank or septic system would
likely prevent release of solid waste or wastewater into Grant Creek, but no specific
designs or locations were provided in the final license application. Developing a solid
waste and wastewater plan, as Forest Service specifies, would allow agencies to review
final plans and ensure facilities are appropriately designed for site-specific conditions.
Effects of Project Operation on Water Temperature in Grant Creek
Diversion of water from Grant Lake into the proposed project’s powerhouse has
the potential to alter the water temperature regime downstream of the lake outlet. If
water temperatures in Grant Creek do not remain similar to existing (baseline) conditions,
they could influence the amount of available spawning and rearing habitat for resident
and anadromous fish and affect egg incubation, timing of emergence, benthic
macroinvertebrate production, and other ecological processes in Grant Creek. Comments
on the draft EIS also include concern that the project’s reduction of flow in the bypassed
reach may influence water temperature in this reach.47
Alaska DFG 10(j) recommendation 8 provide recommendations on efficacy and
operation of the proposed temperature control system (variable intake). NMFS 10(j)
recommendation 8, FWS 10(j) recommendation 8, and Alaska DFG 10(j)
recommendation 8 also provide recommendations related to the underlying monitoring
program that would allow confirmation that temperature targets and goals are being met.
The intake system and monitoring are critical to avoiding and minimizing potential
47 See draft environmental impact statement meeting transcripts, filed January 9,
2019 (accession number 20190109-4006).
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effects of the proposed project on water temperature. Because of these distinct but
interrelated aspects of Kenai Hydro’s proposed temperature management program, the
discussion and analysis of the proposed variable intake and related targets/thresholds
separately is presented below, followed by the proposed temperature monitoring
program.
To minimize adverse effects on the Grant Creek thermal regime, Kenai Hydro
proposes and Alaska (10(j) recommendation 8) recommends a variable depth intake
structure in Grant Lake that includes adjustable gates to target water from depths that
match the current temperature regime in Grant Creek. Kenai Hydro has developed
recommended monthly intake depths designed to minimize project effects on Grant
Creek temperatures. Alaska DFG notes that temperatures in Grant Creek are very similar
to the temperatures at a depth of 0.5 meter in Grant Lake.
Our Analysis
Maintenance of the current Grant Creek thermal regime requires a robust, durable
solution capable of long-term protection of critical fisheries and aquatic resources.
Because Grant Creek temperatures are driven largely by Grant Lake outlet temperatures,
Kenai Hydro’s approach is to continuously monitor both lake and creek temperatures,
adjusting intake elevations in Grant Lake as needed to maintain the Grant Creek thermal
regime. Kenai Hydro has proposed intake depths that, based on continuous monitoring
data, would match downstream temperatures to within 1°C.
Kenai Hydro’s temperature analysis shows that the strongest correlation between
Grant Lake and Grant Creek temperatures was between creek temperatures and surface
lake depths of either 0.5 meter or 1.5 meters, depending on ice cover. During the winter,
Kenai Hydro’s monitoring documented that lake temperatures at a depth of 0.5 meter
most closely match water temperatures in Grant Creek, while during the ice-free period
(May through October), Grant Creek temperatures are most similar to Grant Lake
temperatures at a depth of 1.5 meters (figure 3-8).
In the 2013 winter period (January through April), mean monthly temperatures at
GLTS at a depth of 1.5 meters were up to 1.5°C warmer than Grant Creek (GC200)
temperatures. Close correlation of the water temperatures at Grant Creek and GLTS (at a
depth of 1.5 meters) during the ice-free season was also shown during 2009.
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Figure 3-8. Comparison of daily mean water temperatures in Grant Creek and Grant Lake near the proposed intake
structure at a depth of 1.5 meters, January 2013–June 2014 (Source: Kenai Hydro, 2018a, as modified by
staff).
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Kenai Hydro’s approach for determining the withdrawal depth from Grant Lake
would target the depth where temperatures have been found to be most similar to those at
downstream sites under current conditions. Using data collected in 2013 from April
through September, we compared Kenai Hydro’s average daily temperature data near the
proposed intake (site GLT1) at four depths (0.2, 0.5, 1.5, and 3 meters), with Grant Creek
sites GC100, GC200, and GC300 to determine the intake depth with least impact on the
Grant Creek thermal regime (figure 3-9).
Below, we evaluate Kenai H ydro’s proposed intake depths and subsequent effects
on Grant Creek water temperatures. As shown in both staff and Kenai Hydro’s
assessment, water temperature differences between Grant Creek and Grant Lake are most
apparent during early spring, when creek sites are warming faster than Grant Lake
surface waters. Slightly deeper waters in Grant Lake are colder than creek sites in April
and to a lesser extent in May. This pattern reverses in June through August, when creek
sites are cooler than Grant Lake surface waters and warmer than Grant Lake at 1.5- and
3-meters depth. September differences are minimal as the lake becomes isothermal.
The depths by month that would most closely approximate Grant Creek water
temperatures are summarized below (table 3-16). The depths in April, May, June, and
September are the same as those recommended in Kenai Hydro’s amended final license
application. A withdrawal depth of 0.5 meter in Grant Lake in July and August would
result in less of a difference to downstream temperatures than would 1.5 meters, based
again on 2013 data from Grant Creek sites GC100, GC200, and GC300.
Table 3-16. Grant Lake withdrawal depths with least effect on downstream
temperatures (Source: staff depths based on analysis shown in figure 3-9;
Kenai Hydro data from Kenai Hydro, 2018a).
Month Staff Analysis Proposed Crest Depth
April 0.5 0.5
May 1.5 1.5
June 1.5 1.5
July 0.5 1.5
August 0.5 1.5
September 1.5 1.5
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Figure 3-9. Average monthly temperature differences between Grant Creek sites and Grant Lake, 2013 (Source: staff).
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We reviewed the proposed rule curve for the project to assess whether it could
constrain water temperature management goals during the spring and early summer,
when lake elevation may prevent access to deeper water. Kenai Hydro’s proposed
maximum and minimum pool elevations for Grant Lake are 703 feet and 690 feet,
respectively. Exhibit F (preliminary design drawings), sheet F7, shows the sill elevation
of the intake facility at 686.5 feet (figure 3-10). Maximum intake depth would therefore
be limited to about 1 meter at minimum pool.
Figure 3-10. Cross section of intake facility (Source: Kenai Hydro, 2016, as modified
by staff).
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Grant Lake would be at minimal pool for 17 days in May (from 690 to 691 feet).
During May, our comparison of differences between Grant Lake and Grant Creek
temperatures suggests that an intake depth of 1.5 meters (4.9 feet) best mimics creek
temperatures (measured at GC200 downstream of the tailrace). As noted, there would be
insufficient depth to achieve more than about a 1-meter intake depth in May. However,
review of temperature differences shown in figure 3-9 suggests that Grant Lake and
Grant Creek temperatures are not likely to differ by more than 1°C at an intake depth of
1 meter (the maximum depth possible at this time).
Similar to May, Grant Lake during early June would be at an elevation that may
prevent reaching 1.5 meters below the surface. Based on the 2013 analysis above,
shallower intake depth temperatures are likely to be cooler than Grant Creek temperatures
at that time but still likely to be within 1°C of Grant Creek temperatures. A steeply rising
lake level would limit this issue to early June.
In view of potential operational constraints on the ability to mitigate temperature
impacts of the project, we assessed potential modifications of the project rule curve that
would raise the minimum reservoir elevation to 692 feet, allowing withdrawal at 1.5
meters depth. Raising the minimum elevation to 692 feet while maintaining the same
total annual storage would increase the duration of minimum pool from 17 to 41 days
(May 3 to June 13) under average hydrological conditions (water year 2009). The limited
increase in flexibility that this would provide to manage temperature impacts, particularly
during the ice break-up period, would not justify effects of the extended drawdown on
other resources, including potential for reduced wildlife access, increased shoreline
erosion, increased habitat for invasive plants, and reduced recreational/aesthetic value.
Pre-project temperature data document that Grant Creek temperatures mimic those
of the Grant Lake outlet, regardless of the location in Grant Creek. Figure 3-3, in Section
3.3.2.1, subsection Fish Populations, shows daily mean temperatures at sites monitored at
Grant Creek during 2013 (the most complete data set available). All sites, including
GC100 and GC600, the lower-most and upper-most sites monitored on Grant Creek, have
nearly identical temperatures, showing negligible longitudinal changes in temperature
within Grant Creek under existing conditions. Average difference in mean daily
temperature between these two sites was 0.1°C over the period May through September.
Within the proposed bypassed reach, (Reaches 5 and 6), average difference between Site
GC600 and GC500 was also 0.1 °C over the period May through September (2013).
These small changes reflect the high gradient and heavily shaded nature of this region of
Grant Creek.
In response to a comment on the draft EIS, we expanded our evaluation of effects
of project operation on water temperature in Grant Creek to address potential changes
(warming and cooling) within the bypassed reach specifically. Using a mass-balance
approach, we approximated the effects of the proposed project using daily mean
temperature data collected in Grant Lake (Site GLTS), and at upstream and downstream
ends of the proposed bypassed reach (Sites GC600 and GC500). For this analysis, we
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used daily mean flows from Kenai Hydro’s operations model for 2013, and the
relationship between wetted widths and flow at a cascade transect in the bypassed reach
(TR520). Using observed changes in daily mean temperature from GC600 to GC500
from April 5 to September 26, 2013, we computed the required energy (in joules) needed
to achieve the observed change at known flows, then prorated this energy based on the
change in wetted widths with project flows. The project flows are the proposed
minimum flow with the addition of spill-gate flow in August and September, when Grant
Lake would reach approximately 702 feet amsl.48 The temperature of project inflow was
set equal to either Grant Lake at a depth of 0.5 or 1.5 meters, thus covering the range of
anticipated intake depths.
Comparison of temperature estimates described above to measurements at GC500
in 2013 are shown in figure 3-11. Based on likely intake depths needed to maintain the
lower Grant Creek thermal regime as discussed above (see the Staff Analysis column in
table 3-15), we expect proposed project operation would result in average water
temperatures at the downstream end of the bypassed reach that are about 1°C cooler in
April, about 1°C warmer in May, slightly warmer in June (average 0.1°C), and on
average 0.5°C to 0.9°C warmer in July through September. Although ranges and quartile
differences are greater for the proposed project, bypassed reach temperatures would
generally have been within about 2°C of temperatures measured in 2013 (figure 3-12).
Estimates of Grant Creek bypassed reach temperatures discussed above are a
function of air temperature and local meteorology from April through September of 2013.
For reference, monthly average air temperatures in 2013 at Anchorage were among the
coldest on record in April and among the warmest on record in June, July, and August
(National Weather Service, 2019). Average June and July air temperatures at the Seward
airport in 2013 were also among the warmest on record.49
48 Spill-gate flow is any positive value for the following equation: total flow - 385
cfs powerhouse capacity - 10 cfs minimum flow.
49 Anchorage monthly average air temperature in April was the third lowest, June
and July were the second warmest, and August was the tenth warmest of the 1917-current
period of record. Average monthly air temperatures in June and July were also warmest
and second warmest at the Seward airport (2000-2018).
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Figure 3-11. Daily mean temperatures measured at Site GC500 in 2013 and estimated
under proposed project operation (Source: staff).
Note: Differences are based on releases at lake depths of 0.5 meter in April, July, and
August; and 1.5 meters in May, June, and September (see table 3-16).
An X represents mean, horizontal lines represent medians, a box represents 25% to
75% quartiles, and the top and bottom of vertical lines are minimum and maximum.
Figure 3-12. Boxplots of estimated project effect on temperature at the lower end of the
bypassed reach at Site GC500 (Source: staff).
-2
0
2
4
6
8
10
12
14
16
18
20
4/1 5/1 6/1 7/1 8/1 9/1°CTemperature at GC500, and Estimated Temps at MIFs
GC500 2013 GC500 MIF: 0.5-m release GC500 MIF: 1.5-m release
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Because of the low ratio of proposed bypassed reach flows to proposed
powerhouse discharge, bypassed reach temperatures would typically have minimal effect
on the Grant Creek thermal regime downstream of the powerhouse. When operating at
proposed minimum flows, the bypassed reach would contribute less than 10 percent of
the total flow downstream of the powerhouse. An exception to this pattern could occur
during spills at the dam that result in much higher flows in the bypassed reach, although
the powerhouse discharge would typically be near its capacity of 385 cfs during these
periods. During high spill events, the volume and temperature of spill-gate releases
would dominate releases into the bypassed reach from the intake and, to a lesser degree,
influence temperature downstream of the powerhouse tailrace depending on the ratio of
spill-gate releases to powerhouse discharges.
As noted in agency comments referenced earlier in this section, if water
temperatures in Grant Creek do not remain similar to existing (baseline) conditions, they
could influence the amount of available spawning and rearing habitat for resident and
anadromous fish and affect egg incubation and timing of emergence. Increased
temperatures could also affect benthic macroinvertebrate production and other ecological
processes in Grant Creek.
This analysis indicates that the proposed project operation would increase the
bypassed reach temperature in May through September and may cause more frequent
exceedances of the 15°C rearing and migration criteria in late summer. However,
increases in daily mean temperatures of the bypassed reach would likely remain well
under the Alaska 20°C maximum water temperature criterion.
Water Temperature Monitoring
Kenai Hydro’s proposed temperature monitoring, described in section 3.1 of its
Operation Compliance Monitoring Plan, is generally consistent with agency 10(j)
recommendations. Kenai Hydro would collect temperature data continuously (at 15-
minute intervals) and monitor differences between Grant Creek and Grant Lake. As
discussed in section 3.1 of its Operation Compliance Monitoring Plan, Kenai Hydro
would install temperature monitors at the Grant Lake intake structure in Grant Lake near
the intake (0.5 meter) and at two downstream locations (ST-1 and ST-2 [GC200]). Kenai
Hydro proposes that ST-l, at the downstream end of the bypassed reach, just upstream of
the tailrace, would serve as the reference site for comparison to Grant Lake near the
intake (0.5 meter); Site ST-2 (GC200) would be located about 1,000 feet farther
downstream (figure 3-13). Thermographs would transmit information to the control
system located in the powerhouse via a fiber optic link. The powerhouse would be linked
to the Kenai Hydro Dispatch Center via a telemetry system (e.g., landline, cellular,
satellite) to transmit appropriate supervisory control and data acquisition signals. Kenai
Hydro would collect lake level and associated water temperature data for the duration of
the license term.
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Figure 3-13. Proposed flow and temperature monitoring locations in the Grant Lake Project vicinity (Source: Kenai
Hydro, 2018a, as modified by staff).
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Alaska DFG 10(j) recommendation 8, NMFS 10(j) recommendation 8, and FWS
10(j) recommendation 8 each recommend Kenai Hydro develop a temperature monitoring
plan to be filed with the Commission 6 months before the start of project operation. The
agency recommendations differ with respect to location and number of monitoring sites,
and threshold differences between temperatures in Grant Lake and Grant Creek; i.e., the
difference above which would require corrective action (table 3-17).
Table 3-17. Summary of Kenai Hydro proposed and agency 10(j) monitoring
recommendations (Source: staff).
Location
Kenai
Hydro
Alaska
DFG NMFS Interior
Gage upstream of intake structure (OCMP
Station RT-1); unspecified depth
X
Gage in Grant Lake at 0.5 meter (away
from influence of project intake)
Gage in Grant Lake at 0–0.5 meter (near
intake)
X
Gage in Grant Lake at 0-0.5 meter (away
from influence of project intake)
X
Gage in Grant Lake at 0–1 meter (near the
intake)
X
Thermograph inside of intake structure
(OCMP Station IT-1)
X X X
Grant Creek lower bypassed reach (ST-1) X
Grant Creek downstream of tailrace (ST-2
[GC200]) in the OCMP)
X X X X
1ºC X Xb X
0.5ºC Xa
a Inferred from 10(j) comments.
b 0.5ºC, not exceeding 1.0ºC during initial years of operation.
Alaska DFG, NMFS, and FWS recommend that the Grant Creek reference
location—the site to be compared to Grant Lake—be downstream of the powerhouse
tailrace. Kenai Hydro proposes that ST-1, at the downstream end of the bypassed reach,
serve as the reference in Grant Creek. Recommended monitoring locations in Grant Lake
differ slightly among the agencies; however, each agency recommends monitoring
surface waters at depths from 0 to 1.0 meter near the proposed intake structure. In
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addition, Kenai Hydro proposes, and the agencies recommend, monitoring within the
intake structure.
Regarding threshold temperatures, FWS recommends and Kenai Hydro proposes a
threshold of 1°C, while NMFS recommends 0.5°C, not greater than 1°C during initial
years of operation. Alaska DFG recommends a 0.5°C threshold. We note that these
thresholds refer to maximum differences between Grant Lake and Grant Creek
temperatures, not to absolute temperatures at these locations.
Our Analysis
Small deviations from the current thermal regime could lead to large differences in
the timing of emergence and condition of salmonid fry. In their 10(j) recommendations,
Alaska DFG, NMFS, and FWS note that water temperature is a fundamental variable
affecting fish development, particularly for over-wintering eggs and alevins, and that a
consistent temperature difference of even 0.5°C during the entire winter could alter the
timing of emergence by as much as 1 month and could, therefore, seriously affect fry
survival. Fuhrman et al. (2017) found that salmonid fry from warmer thermal regimes
emerged earlier than those from colder regimes both in terms of calendar date and
temperature units and that warmer temperatures caused fry to emerge less developed.
McCullough (1999) found that when the base temperature is 2°C, an increase of 1°C
results in a shortening of time to emergence for chinook by 60 days; increasing winter
incubation temperature from 6°C to 7°C results in a reduction of time to emergence by 22
days. Other effects of flow management on aquatic resources, including fish and benthic
macroinvertebrates are discussed in section 3.3.2.2, in the Effects of Project Operation on
Aquatic Habitat in the Bypassed Reach and the Effects of Project Operation on
Macroinvertebrates subsections.
As noted above, Kenai Hydro proposes that ST-l, at the downstream end of the
bypassed reach, just upstream of the tailrace, would serve as the reference site for
comparison to Grant Lake near the intake (0.5 meter). However, in contrast to site ST-1,
site ST-2 (GC200) is also the proposed stream gaging location and is within and
representative of the reach of Grant Creek that is accessible to anadromous fish. In
addition, this location informed staff as well as Kenai Hydro’s assessment of existing
temperature relationships between Grant Creek and Grant Lake. Finally, site ST-2
(GC200) would integrate any effects of the project on temperatures in the bypassed reach.
We see no direct role for site ST-1 in temperature management.
As described in section 3.1 of the Operation Compliance Monitoring Plan, Kenai
Hydro’s proposal to deploy a stratified set of temperature probes at various depths in
Grant Lake would inform and refine the understanding of water temperature responses to
changes in intake elevations. However, compliance with temperature targets would be
best achieved by comparing temperature differences between site ST-2 (GC200) and
Grant Lake at 0.5 meter and adjusting the intake level accordingly to control temperature
in Grant Creek. Temperature probes within the intake structure would be redundant and
unnecessary to an operational temperature monitoring program.
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As stated in its Operation Compliance Monitoring Plan, Kenai Hydro would
monitor temperature at locations throughout the project area to ensure that monthly lake
and creek temperatures are within 1°C. Below, we compare differences in daily, 7-day
average, and the monthly mean temperature difference between Grant Creek at site ST-2
(GC200) and Grant Lake at 0.5 meter during May 2013 (figure 3-14). Using the monthly
average difference as a target masks greater variability that occurs more frequently and
could therefore negatively affect over-wintering eggs and alevins. However, Kenai
Hydro would have access to temperature data on a real-time basis and could make
corresponding changes in intake elevation as needed to target appropriate water
temperatures in Grant Creek on a real-time basis. Managing Grant Creek water
temperatures on a real-time basis would minimize the project’s potential to negatively
affect water temperatures in Grant Creek and subsequently influence development of
eggs, alevin, and fish residing there.
Figure 3-14. Differences in 7-day average and daily temperatures versus average
monthly temperature difference in Grant Creek and Grant Lake, May, 2013
(Source: Kenai Hydro, 2018a, as modified by staff).
To determine compliance with any operational temperature requirements, the
water temperature monitoring plan could establish well-defined target and threshold
differences between Grant Creek and Grant Lake temperatures, as recommended by the
agencies. Kenai Hydro’s 2013 temperature data indicate that, except for May, water
temperatures measured at 0.5-meter depth in Grant Lake are generally within 0.5°C of the
water temperature concurrently measured at ST-2 (GC200). Subsequently, using real-
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time water temperature data from 0.5-meter depth in Grant Lake to establish a real-time
water temperature target for Grant Creek would establish a temperature regime for Grant
Creek, and operating the project to meet that target would establish a temperature regime
in Grant Creek that closely mimics current conditions. However, during May,
differences in water temperatures as great as 2.1°C warmer have been observed, likely
the result of rapidly changing air temperatures during the spring (figure 3-15).
Establishing threshold differences of +/− 0.5°C between Grant Lake (0.5-meter depth)
and Grant Creek temperatures at site ST-2 (GC200), as recommended by Alaska DFG,
should be attainable and most protective of the aquatic resources in Grant Creek during
all months, except during the ice break-up period. Differences in water temperature data
collected during May 2013 have an upper quartile value difference of 1.7°C, with a
median difference of 1.2°C. Therefore, allowing threshold differences of 0.5°C between
Grant Creek and Grant Lake water temperatures at a 0.5-meter depth plus 1°C would
result in Grant Creek temperature fluctuations that mimic current conditions during ice
breakup.
Figure 3-15. Box and whisker plot showing temperature differences between Grant
Creek Site ST-2 (GC200) and Grant Lake at 0.5 meter, 2013 (Source:
staff).
Kenai Hydro’s development of a plan that outlines goals and objectives of Grant
Creek temperature management, as recommended by the agencies, would be beneficial in
that it would detail the location and operation of temperature gages and improve clarity of
project operation and compliance monitoring. While the agencies recommend that Kenai
Hydro develop a separate temperature monitoring plan, modifying the Operation
Compliance Monitoring Plan to incorporate these criteria as proposed by Kenai Hydro
would avoid the need for a new stand-alone plan.
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Fishery Resources
Construction Effects on Fisheries and Macroinvertebrate Resources
Grant Lake—Construction of the proposed project’s intake has the potential to
adversely affect resident fish and macroinvertebrate populations in Grant Lake from
temporary displacement and mortality associated with the cofferdam construction and
dewatering, excavation of the lakebed to the base of the intake, and erosion and runoff
from adjacent disturbed areas.
In its amended final license application, Kenai Hydro proposes to develop several
plans—an ESCP, a hazardous material containment/fuel storage plan, a spill prevention,
control and containment plan, a construction water quality monitoring plan, and a
blasting plan—to protect both water quality and fisheries resources during construction.
Alaska DFG’s 10(j) recommendation 9, NMFS 10(j) recommendation 9 and
FWS’s 10(j) recommendation 10 about timing windows for instream construction also
apply to construction of the intake in Grant Lake.
Alaska DFG (10(j) recommendation 10) and FWS (10(j) recommendation 11) for
stream buffers include exemptions from the recommended timing windows for
appurtenant facilities, which include the weir at the outlet of Grant Lake, intake in Grant
Lake, and monitoring equipment in Grant Lake. Alaska DFG states that construction and
maintenance of these sections of the project would be addressed in an ESCP.
In response to these recommendations, Kenai Hydro agreed to consult on its
proposed resource management plans and implement agency recommendations for
instream construction scheduling, which includes construction in Grant Lake.
Grant Creek—Construction activities could adversely affect anadromous and
resident fish and macroinvertebrate populations in Grant Creek through temporary
displacement and mortality associated with construction and erosion and runoff from
adjacent disturbed areas. Increases in suspended sediment could reduce aquatic habitat
suitability downstream of the construction area, including Lower Trail Lake and Trail
Lake Narrows, bury fish eggs, and clog the gills of macroinvertebrates.
As described above in the Grant Lake subsection, Kenai Hydro’s proposed ESCP,
hazardous material containment/fuel storage plan, spill prevention, control and
containment plan, a construction water quality monitoring plan, and a blasting plan would
be implemented for all construction activities occurring in Grant Creek.
In Alaska DFG’s 10(j) recommendation 9, NMFS 10(j) recommendation 9, and
FWS’s 10(j) recommendation 10, the respective agencies recommend Kenai Hydro work
with Alaska DFG’s habitat biologist to establish timing windows for instream
construction and stream crossing activities. Alaska DFG states that timing windows are
needed to ensure that instream construction activities do not adversely affect aquatic
resources.
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Alaska DFG’s 10(j) recommendation 10 and FWS 10(j) recommendation 11 also
recommend that Kenai Hydro maintain stream buffers around clearings, road corridors,
and the transmission line corridor. Alaska DFG states that construction activities should
be sited at least 100 horizontal feet from the ordinary high water of Grant Creek, except
for clearings for the powerhouse, appurtenant facilities, and tailrace. Alaska DFG states
that appurtenant facilities include, but are not limited to, the bridge across Trail Lake
Narrows, the weir at the outlet of Grant Lake, the intake in Grant Lake, and monitoring
equipment in both Grant Lake and Grant Creek. An exception is also recommended for
about 500 feet of access road east of Trail Lake Narrows, where private property
necessitates construction of the road and transmission line corridor within 100 feet of
Grant Creek. Alaska DFG states that construction and maintenance of this section of the
project would be addressed in the ESCP.
In response to the agencies’ recommendations, Kenai Hydro agreed to consult
with the resource agencies regarding the development of its proposed resource
management plans and implement agency recommendations for an instream construction
scheduling.
Lower Trail Lake and Trail Lake Narrows—Construction of the proposed
project’s powerhouse access road and transmission line at Trail Lake Narrows, upstream
of Lower Trail Lake, also has the potential to adversely affect aquatic resources through
temporary displacement and mortality associated with construction and erosion and
runoff from adjacent disturbed areas. However, as is the case for Grant Creek and Grant
Lake, Kenai Hydro’s proposed plans to protect water quality and aquatic resources during
construction and the resource agencies’ recommended instream construction timing
windows would be implemented during construction of the access road and transmission
line across Trail Lake Narrows.
Alaska DFG’s 10(j) recommendation 9, NMFS 10(j) recommendation 9, and
FWS’s 10(j) recommendation 10 for timing windows for instream construction would be
implemented during construction of the of access road and transmission line in Lower
Trail Lake and Trail Lake Narrows.
However, under Alaska DFG (10(j) recommendation 10) and FWS (10(j)
recommendation 11) recommendations, 100-foot stream buffers would not be provided
for clearings for the powerhouse, appurtenant facilities, and tailrace. Alaska DFG states
that appurtenant facilities include, but are not limited to, the bridge across Trail Lake
Narrows, the weir at the outlet of Grant Lake, the intake in Grant Lake, and monitoring
equipment in both Grant Lake and Grant Creek. The buffers would also not be provided
for about 500 feet of access road east of Trail Lake Narrows, where private property
necessitates construction of the road and transmission line corridor within 100 feet of
Grant Creek. Alaska DFG states that construction and maintenance of this section of the
project would be addressed in the ESCP.
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Our Analysis
Kenai Hydro’s proposed project, including the location of its project facilities,
would limit disturbance to aquatic habitat. Kenai Hydro’s exhibit drawings show that its
facilities would be at least 100 feet from stream crossings (where practicable) as
recommended by Alaska DFG; those facilities located closer than 100 feet fall within the
exceptions noted by Alaska DFG (tailrace, powerhouse, intake, and appurtenant
facilities) and cannot practicably be located farther away. Maintaining this buffer
distance from the ordinary high water of Grant Creek and Grant Lake would reduce the
potential for bank erosion and prevent the removal of important riparian habitat that
supports aquatic resources.
Alaska DFG, NMFS, and FWS’s recommendations that timing windows be
established for instream construction activities and stream crossings could minimize harm
or disturbance either to fish during sensitive life stages such as migration and spawning,
or to macroinvertebrate species and life stages intolerant to higher levels of turbidity.
Establishing the timing windows for instream activities in consultation with Alaska DFG,
as Kenai Hydro proposes, would ensure the windows are adequate to protect aquatic
resources while providing some accommodation to project construction requirements.
As discussed above in the Effects of Construction on Water Quality subsection, the
development and implementation of the above-listed plans would protect water quality
and, therefore, fisheries and macroinvertebrate resources, during construction. Given the
remote nature of the project, having an ECM on site to monitor project construction
activities and ensure measures effectively protect environmental resources is appropriate
and would further benefit aquatic resources.
Effects of Grant Lake Fluctuations on Resident Fish
The volume of water in Grant Lake at any given time would affect Kenai Hydro’s
ability to address storage and power generation needs and its ability to maintain
minimum instream flows and channel maintenance flows. Reservoir fluctuations also
have the potential to affect aquatic resources in Grant Lake through exposure of resident
fish habitat and stranding during reservoir drawdowns.
In its amended final license application, Kenai Hydro proposes to follow a lake
level rule curve for drawdowns and subsequent refilling over time (see figure 3-6).
Under Kenai Hydro’s proposed operation, Grant Lake’s elevation would vary from a
normal maximum of 703 feet, which is the elevation of the natural Grant Lake outlet,
down to a minimum lake elevation of 690 feet. To provide storage for spring flows,
Kenai Hydro would draw down the lake during the winter and use these reservoir releases
to generate power and meet instream flow requirements in Grant Creek.
Our Analysis
As discussed in the Effects of Project Operation on Water Quantity subsection, the
proposed project would alter the existing timing, magnitude, and duration of water
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surface elevation fluctuations in Grant Lake. While it would not inundate any existing
out-of-water lakeshore habitat, proposed project operation would lower the lake level by
about 2 feet compared to existing conditions. The proposed project’s operation would
result in greater inter-monthly water surface elevation changes, the greatest of which
occur during ice breakup and snowmelt from late March through late June.
Resident fish in Grant Lake (slimy and coastrange sculpin and threespine
stickleback) typically spawn in the late spring, usually after ice breakup, in shallower
waters among rocks or logs. Because of the steep topography of the shoreline around
most of the lake, a 2-foot-drop in minimum elevation of Grant Lake would dewater
approximately 15 acres, or about 1 percent of the lakeshore, regardless of habitat quality
(table 3-18). The steep lakeshore topography also contributes to very little additional
potential for stranding on these 15 acres.
Table 3-18. Grant Lake storage and surface area relative to lake elevation (Source:
Kenai Hydro, 2018a, as modified by staff).
Lake Elevation
(feet, NAVD 88) Elevation Description
Gross Storage
(acre-feet)
Surface Area
(acres)
703 Full pool, elevation of natural
lake outlet
260,120 1,741
692 Current low elevation 244,220 1,657
690 Minimum surface elevation 241,329 1,642
Therefore, resultant changes to reservoir fluctuations as caused by operation of the
project, as proposed, would have little effect on slimy and coastrange sculpin and
threespine stickleback in Grant Lake because of the small percentage of available habitat
that would be exposed during drawdown and the very small likelihood of stranding.
Effects of Entrainment of Resident Fish in Grant Lake
Fish entrained into intakes at hydropower projects can be subject to injury or
mortality resulting from turbine-blade strike, pressure changes, sheer forces, and water
velocity accelerations. Alternatively, entrained fish may survive and interact with fish
populations located downstream of the powerhouse. Juvenile fish have the greatest
potential for entrainment because they have poor swimming ability, whereas adult fish
have a much greater swimming ability and generally can avoid entrainment, unless fish
desire to migrate downstream. Although project-specific entrainment studies were not
conducted to estimate fish mortality through the proposed project’s turbines, mortality
rates for fish that pass through Francis turbines can vary from 5 to 90 percent depending
on turbine design, head, and fish size.
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Kenai Hydro does not propose and no entity recommends measures to prevent or
minimize resident fish entrainment at the intake structure aside from a trash rack, which
is designed to keep debris from entering the power conduit.
Our Analysis
The proposed intake structure in Grant Lake would selectively withdraw reservoir
water from depths that range from about 4 to 18 feet. Resident fish species in Grant Lake
include both limnetic-benthic 50 (threespine stickleback), and benthic (slimy and
coastrange sculpin) fish. The two species of sculpin in Grant Lake prefer to stay close to
the substrate and, therefore, would not typically be found within the intakes’ area of
influence, thereby avoiding involuntary entrainment. Threespine stickleback, however,
occupy both benthic environments and well-lit open waters away from shores. Therefore,
any threespine stickleback occupying the limnetic zone would be susceptible to some
level of entrainment.
Kenai Hydro proposes to install an intake trashrack sized to keep the maximum
approach velocity at the intake below 2.5 feet per second. Threespine stickleback are
known to have swimming speeds of up to 2.88 feet per second, suggesting that most
reservoir fish that are expected to occur in deeper water near the intake have swimming
speeds that meet or exceed the maximum approach velocity of water entering the intake
and should be able to avoid involuntary entrainment, but some smaller sticklebacks may
be susceptible to entrainment.
Under Kenai Hydro’s proposed project design and operation, some losses of
threespine stickleback would result from turbine entrainment, but these losses would be
minimal because of the varying depth preference and swimming speed of stickleback.
Effects of Loss of Habitat Connectivity and Bi-directional Passage on Resident
Fish in Grant Lake and Grant Creek
The series of impassible falls in Grant Creek downstream of Grant Lake’s outlet
prevent both resident and anadromous salmonids from entering Grant Lake. However,
the resident fish species in Grant Lake (slimy and coastrange sculpin and threespine
stickleback) are known to inhabit both Grant Lake and Reach 6 of Grant Creek upstream
of the impassable falls. Under existing conditions, resident fish residing in Grant Lake
have access to the lake’s natural outlet (Grant Creek) and may voluntarily migrate
downstream when flows allow.
50 Limnetic fish are those fish that remain in the well-lit, open surface waters away
from shore. Benthic fish are those fish that remain on or near the bottom. Limnetic-
benthic fish are those species that are known to be either limnetic or benthic, depending
on life stage, or those species that can be either depending on the morphological traits
that develop in a particular population.
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As designed, the proposed project would divert up to 385 cfs from Grant Lake and
return it to Grant Creek about 3,200 feet downstream from the lake’s outlet. When the
lake level is lower than the natural outlet, minimum flows in the bypassed reach would be
provided via a bypass weir and pump, while a concrete weir at the outlet of Grant Lake
would provide consistent water level control, and would block voluntary downstream
passage of resident fish.
Kenai Hydro does not propose and the resource agencies do not recommend any
measures to pass resident or anadromous fish above the anadromous fish barrier at the
Reach 5/6 break in Grant Creek.
Our Analysis
The presence of the proposed project’s weir at the outlet of Grant Lake is not
expected to affect the upstream passage of resident fish into Grant Lake because under
existing conditions, a waterfall located less than 100 feet downstream of the outlet
prevents the upstream migration of resident fish.
Voluntary downstream migration from Grant Lake would only be available to
resident fish when flows in the bypassed reach are provided via overflow from Grant
Lake (e.g., when the lake is full and inflow into the lake exceeds the 385 cfs capacity of
the project’s turbines, approximately from the mid-August to mid-September). Under
existing conditions, resident fish in Grant Lake are able to voluntarily migrate
downstream throughout the year.
Effects of Project Operation on Aquatic Habitat in the Bypassed Reach
Operation of the proposed project would divert up to 385 cfs from Grant Lake and
return it to Grant Creek about 3,200 feet downstream from lake’s natural outlet. This
reduction in flow in the proposed Grant Creek bypassed reach (Reaches 5 and 6) would
directly affect the capacity of Grant Creek to support macroinvertebrate populations;
spawning, rearing, and other life stages of resident and anadromous fish; and other
physical and biological processes including LWD and sediment transport.
To maintain aquatic habitat connectivity and support resident and anadromous fish
spawning in Grant Creek, Kenai Hydro proposes to maintain seasonal minimum instream
flows in the bypassed reach ranging from 5 to 10 cfs (table 3-19). Kenai Hydro would
use a bypass weir and pump system to provide minimum instream flows to Grant Creek
from the project intake, while a concrete weir at the outlet of Grant Lake would provide
consistent water level control. The weir and pump combination would allow the
minimum flow to be released at the top of Reach 6 near the natural lake outlet (see figure
2-2). Kenai Hydro states that with these measures, project operation would not dewater
any section of Grant Creek, and the project would provide flows to maintain anadromous
and resident passage in Reach 5 and provide persistent wetted habitat for
macroinvertebrate populations in Reach 6. Kenai Hydro would monitor and document its
adherence to these minimum flows in its annual compliance report, which it would
prepare in consultation with the resource agencies prior to filing with the Commission.
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Alaska DFG (10(j) recommendation 1), FWS (10(j) recommendation 1), and
NMFS (10(j) recommendation 1) each recommend Kenai Hydro provide seasonal
minimum instream flows in the bypassed reach to maintain ecological functions,
processes, and habitat connectivity. The agency-recommended flows are identical to
those proposed by Kenai Hydro, except the resource agencies recommend extending the
10 cfs release through the end of September, which they state would provide better
connectivity for adult sockeye and Chinook salmon upstream of the tailrace.
In its reply comments, Kenai Hydro indicated its agreement with the resources
agencies’ recommended minimum flow releases for the bypassed reach and modified its
proposed minimum flows to be consistent with the resource agencies 10(j)
recommendations (table 3-19).51
Table 3-19. Kenai Hydro’s proposed and the resource agencies recommended minimum
instream flows for the Grant Creek bypassed reach (Source: Kenai Hydro,
2018b, as modified by staff).
Month
Kenai Hydro Proposed and Alaska DFG, FWS,
and NMFS Recommended Minimum Flow Release
in the Bypassed Reach (cfs)a
January 1–July 31 5
August 1–September 31 10
October 7
November 1–December 31 5
Mean Annual 6
Our Analysis
The diversion of water out of Grant Creek would influence both aquatic habitat
and aquatic biota in the bypassed reach. We discuss the effects on habitat and biota
individually, below.
Aquatic Habitat
As a component of its instream flow studies in Grant Creek, Kenai Hydro worked
with the resource agencies to assess aquatic habitat availability and connectivity in Reach
51 Kenai Hydro’s original proposed minimum flow releases for the bypassed reach
were 5 cfs from January 1–July 31 and November 1–December 31, 10 cfs from
August 1–September 7, and 7 cfs from September 8–October 31.
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5 of the proposed bypassed reach (McMillen, 2014). Because of the relatively poor
habitat conditions in Reach 5 (see section 3.3.2.1, in the Fishery Resources subsection),
the technical working group 52 and Kenai Hydro agreed to use a riverine habitat
simulation model (RHABSIM), a physical habitat simulation model (PHABSIM), and the
Oregon Method (Thompson, 1972) to evaluate fish passage success in Reach 5
(i.e., connectivity) at a range of modelled instream flows. Kenai Hydro used RHABSIM
and PHABSIM to calculate stage-discharge (depth-discharge) relationships at two
transects expected to be sensitive to changes in flow and stage. Using these data, Kenai
Hydro then tallied the station depths equal to or exceeding known passage depth criteria
for each species at each modeled flow (table 3-20). The total width of the cells in each of
these categories at each modeled flow was then divided by the total wetted width at each
flow to compute the percent of the transect that was passable. Kenai Hydro then used the
Oregon Method to determine overall habitat connectivity. The Oregon Method
recommends a minimum depth of 0.6 foot for large trout and 0.8 foot for Chinook salmon
to achieve successful passage (table 3-20). The Oregon Method concludes that the
passage flow is adequate when the depth criterion is met on at least 25 percent of the
transect width and on at least a 10 percent continuous portion.
Table 3-20. Minimum depth criteria required for species found in Grant Creek (Source:
McMillen, 2014).
Species Minimum Depth Criteria
Chinook Salmon 0.80 feet
Coho and Sockeye Salmon 0.60 feet
Dolly Varden Char and Rainbow Trout 0.40 feet
Based on the results of this assessment, the passage criteria for Chinook salmon
(0.8 feet) in Reach 5 is met at 30 cfs. The passage criterion for coho salmon, sockeye
salmon (0.6 feet), Dolly Varden and rainbow trout in Reach 5 is met at 10 cfs.
While Kenai Hydro’s proposed and the resource agencies recommended minimum
instream flows in the bypassed reach would not meet the Oregon Method’s passage
criteria for adult Chinook salmon, the mean monthly discharge calculated from the
composite record shows that flows in Grant Greek would exceed the project’s turbine
capacity in June, July, and August. In June and early July, Kenai Hydro would store
52 The Technical Working Group included Kenai Hydro and its consultants (Long
View Associates, HDR, and Northern Ecological Services) and representatives from
Alaska DFG, Alaska DNR, the Forest Service, FWS, Friends of Cooper Landing, Cook
Inlet Aquaculture Association, Kenai Area Fishermen’s Coalition, and Kenai River
Sportfishing Association.
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flows in excess of the turbine capacity in Grant Lake; after the lake is full in mid-July,
these excess flows would enter the bypassed reach by overtopping the project weir at the
outlet of Grant Lake. These flows would likely be high enough to facilitate Chinook
passage into Reach 5 in August (see section 3.3.2.1, Aquatic Resources, Affected
Environment). However, anticipated flows for September would not always exceed the
project’s maximum turbine capacity; consequently, the September minimum flows of 10
cfs proposed by Kenai Hydro and recommended by the resource agencies, would not
meet the 30 cfs required for adult Chinook passage. However, because Chinook
spawning is limited to August and early September, spawning habitat in Reach 5 is very
limited, and Chinook were not observed spawning in this reach, the proposed minimum
flows would not negatively affect Chinook spawning.
Kenai Hydro’s proposed and the agencies recommended minimum flows would
not provide the 10 cfs required for rainbow trout and Dolly Varden passage year-round.
Rainbow trout in the Grant Creek system spawn from mid-May through June, when the
proposed and recommended minimum flow would be 5 cfs. Although Reach 5 contains
approximately 26 percent of all habitat in Grant Creek below Reach 6, about 57 percent
of Reach 5 is cascade habitat and is not preferred spawning habitat for resident trout.
Therefore, the proposed and recommended minimum flows would preclude rainbow trout
access to all of Reach 5, which is about 15 percent of existing spawning habitat in Grant
Creek, throughout the spawning period. In contrast, Dolly Varden spawn mid-August
through mid-November in the Grant Creek system. While the proposed 10 cfs minimum
flows in August and September, would provide adequate flows for passage of spawning
Dolly Varden, the proposed 7 cfs minimum flows for October and 5 cfs flow in
November would not. Therefore, the proposed minimum flows would limit Dolly
Varden spawning in Reach 5 to the first 6 weeks of the spawning season when all of
existing Doly Varden habitat would be accessible and would not allow spawning in
Reach 5, about 15 percent of existing spawning habitat in Grant Creek, during the second
6 weeks of the spawning season. As discussed in section 3.3.2.2, in the Effects of Project
Operation on Aquatic Habitat Downstream of the Project Tailrace subsection, the
proposed elevated flows in winter would be expected to increase rearing habitat for
resident salmonids by providing consistent flow to the Reach 1 distributary and Reach
2/3 side channels. The proposed minimum flows in the bypassed reach, which would
limit access to spawning habitat in Reach 5, combined with the proposed minimum flows
downstream of the project tailrace which would increase rearing habitat downstream of
the tailrace, are not expected to have a cumulative, negative effect on the resident
salmonid species in Grant Creek.
As discussed in section 3.3.2.2, Effects of Project Operation on Water
Temperature, proposed project operations would have resulted in average water
temperatures at the downstream end of the bypassed reach of about 1°C cooler in April,
about 1°C warmer in May, slightly warmer in June (average 0.1°C), and on average 0.5
to 0.9°C warmer in July through September (in contrast to temperature data collected in
2013, see figure 3-12). Assuming they are representative of bypassed reach temperatures
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during operations, these changes have an effect on resident salmonids in the accessible
areas of Reach 5; however, as discussed above, rainbow trout spawning is not expected in
Reach 5 because of the proposed minimum flows during the spawning season. Minimum
flows in August and September would allow for Dolly Varden to access spawning beds in
Reach 5; project-induced temperature increases during this time would be small and are
not expected to affect Dolly Varden that may be spawning in Reach 5 during this period.
As discussed above, access to Reach 5 by Chinook salmon would be restricted to August
and parts of September, and the minor project-related temperature increases during this
period are not expected to negatively affect Chinook spawning.
Elevated temperatures are not anticipated to affect incubation of anadromous and
resident salmonids because salmonid eggs typically hatch by mid-July for all species,
except rainbow trout, which incubate from mid-May through the end of August. Project-
related temperature changes in the bypassed reach are not anticipated to affect rainbow
trout incubation because rainbow trout spawning is not expected in Reach 5.
Therefore, Kenai Hydro’s proposed and Alaska DFG, FWS, and NMFS’s
recommended minimum instream flows for the bypassed reach, would support the
ecological functions, processes, and connectivity necessary to sustain aquatic resources in
the bypassed reach.
Aquatic Resources
In addition to limiting access to aquatic habitat in the downstream portions of the
bypassed reach, as discussed above, proposed and recommended minimum flows would
affect both resident fish and macroinvertebrates in the bypassed reach. However, any
adverse effects on these organisms are expected to be minor because of poor habitat
conditions created by the high to moderate gradient, coarse substrate dominated by
boulder and bedrock, and high water velocities. Although the bypassed reach likely
provides some rearing and spawning habitat for resident sculpin and threespine
stickleback, it is unlikely this habitat would persist year-round because of the
predominately confined and high to moderate gradient stream channel and limited
holding areas (pools) for fish. Furthermore, the occurrence of high flow events under
current conditions and the proposed and recommended channel maintenance flows under
proposed project operation make it unlikely that the bypassed reach supports a self-
sustaining spawning population of resident fish. Construction of the project would
eliminate the potential for fish originating from Grant Lake to access the bypassed reach,
except during high flows when the project is in run-of-river mode in the summer, and the
number of fish in the reach would likely be reduced. Therefore, the proposed minimum
flows should be adequate to maintain habitat connectivity for fish, amphibians,
macroinvertebrates, and other aquatic organisms in the bypassed reach.
While research has shown that macroinvertebrate communities respond to the
timing of extreme flows, few studies have explored the ecological responses to flow
within river systems and specifically regulated environments (White et al., 2017).
Comparison of Grant Creek macroinvertebrate metrics with other Kenai Peninsula stream
3-79
metrics indicates that current conditions in Grant Creek are more stressful for
macroinvertebrate populations than other streams in the region, and the populations in
Grant Creek are composed of taxa that can thrive where streamflows are variable
(BioAnalysts, 2014). The proposed project would modify the magnitude of peak flows
observed in the late spring under current conditions, but would retain most of the high
flows observed during the summer (see figure 3-7); however, because the
macroinvertebrate taxa are adapted to highly variable flows, it is not expected that project
operation would have a significant impact on the species assemblage and populations
found in the bypassed reach of Grant Creek.
Effects of Project Operation on Aquatic Habitat Downstream of the Project
Tailrace
As is the case for the proposed bypassed reach, operation of the proposed Grant
Lake Project would alter the seasonal instream flow pattern in Grant Creek downstream
of the proposed project’s powerhouse. These altered flow conditions could affect the
river’s capacity to support spawning, rearing, and other life stages of Chinook, coho, and
sockeye salmon, as well as resident rainbow trout and Dolly Varden.
On August 6, 2018, Kenai Hydro filed a revised instantaneous instream flow
schedule for the proposed project below the powerhouse, developed collaboratively with
the resource agencies (table 3-21). On August 24, 2018, NMFS filed comments
supporting Kenai Hydro’s revised flow schedule. On August 24, 2018, and August 29,
2018, Alaska DFG and FWS, respectively, filed amendments to their 10(j)
recommendation 2 that is consistent with Kenai Hydro’s proposed flow schedule.
Table 3-21. Existing mean monthly discharge and proposed minimum flows in Grant
Creek below the tailrace (Source: staff).
Period
Existing Mean
Monthly
Discharge
Kenai Hydro proposed and
Alaska DFG, FWS, and NMFS
recommended minimum flows
January 52 60
February 43 60
March 33 60
April 36 60
May 1–May 15 87 60
May 16–May 31 199 80
June 1–June 15 353 150
June 16–June 30 465 150
July 1–July 15 504 195
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Period
Existing Mean
Monthly
Discharge
Kenai Hydro proposed and
Alaska DFG, FWS, and NMFS
recommended minimum flows
July 16–July 31 500 195
August 444 195
September 366 150
October 1–October 15 275 125
October 16–October 31 194 72
November 1–November 15 143 72
November 16–November 30 106 60
December 73 60
Our Analysis
Proposed project operation would have the greatest effect on the annual
hydrograph in lower Grant Creek during the spring and early summer (June through mid-
July) when snowmelt runoff dominates with effects varying in magnitude depending on
the amount of annual snowpack and rainfall (figure 3-16). During this time of the year,
water in the Grant Creek S ystem would be managed to fill Grant Lake and flows in lower
Grant Creek (Reaches 1 through 4 and the lower portions of Reach 5) would include
discharge from the project’s powerhouse plus any additional instream flows released into
the bypassed reach (figure 3-16).
Under the proposed and recommended operational regime, the minimum instream
flows in lower Grant Creek would range from about 60 to 195 cfs. While maintaining
these minimum flows would represent a substantial reduction in the volume of water in
Grant Creek during the spring and early summer, when Chinook, pink, and sockeye
salmon enter Grant Creek to spawn and rainbow trout are spawning, these minimum
flows should be considered a worst-case scenario. For example, during normal water
years, June through early July flows with the proposed project in place would range from
approximately 200 to 400 cfs, and during low water years, flows with the project in place
would range from about 90 to 350 cfs (figure 3-16). Once Grant Lake is full (usually by
mid-August), flows in lower Grant Creek would include discharge from the project’s
powerhouse, plus any inflow into Grant Lake in excess of the project’s 385 cfs capacity.
The project would have little or no effect on flows in lower Grant Creek during the
Chinook, coho, pink, and sockeye salmon and Dolly Varden spawning periods.
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Figure 3-16. Annual mean daily and proposed minimum flows in Grant Creek below the
tailrace (Source: staff).
Pink salmon, the first of the salmon species to enter and spawn in Grant Creek,
were found to spawn only in Reach 1 in August. Investigations identified only two pink
redds in riffles in the mainstem of Reach 1. Because of the low number of pink salmon
observed, it is unknown whether pink salmon would also use habitat located in the Reach
1 distributary in years with more returning adult pink salmon. Under current conditions,
a logjam at the head of the Reach 1 distributary limits inundation of the distributary to
flows in Grant Creek of more than 190 cfs. Under the proposed and recommended
operational regime, flows in August are expected to be in excess of 300 cfs with a
minimum flow of 190 cfs. These flows would maintain access to all of Reach 1 for pink
salmon spawning in Grant Creek.
To evaluate the effects of altering the natural hydrograph on resident and
anadromous fish habitat in lower Grant Creek, Kenai Hydro conducted an instream flow
study using the Instream Flow Incremental Methodology including PHABSIM
(McMillen, 2014). The focus of the analysis was to evaluate the changes in weighted
usable area (WUA)53 for spawning and rearing of Chinook, sockeye, and coho salmon,
and rainbow trout and Dolly Varden that would occur under average monthly flow
ranging from 10 cfs to 1,000 cfs.
During an average water year, the amount of spawning WUA for Chinook,
sockeye, and coho salmon would remain the same as under current conditions. However,
53 The WUA is an index of habitat suitability.
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during low water years, each of the proposed and recommended minimum flow regimes
(table 3-21) may constitute the entirety of the flow available below the tailrace because
Grant Lake is never filled, the amount of spawning WUA for Chinook, sockeye, and
coho salmon would decrease in the anadromous reach of Grant Creek during their
respective spawning seasons (August through October) (figure 3-17). Kenai Hydro’s
proposed and the resource agencies minimum flows for August would provide 87 percent
of existing spawning WUA for Chinook and 85 percent of existing spawning WUA for
sockeye. In September, Kenai Hydro’s proposed and the agencies’ recommended
minimum flows would provide 79 percent of the existing spawning WUA for Chinook,
88 percent of the existing spawning WUA for coho, and 84 percent of the existing
spawning WUA for sockeye. Kenai Hydro’s proposed and the agencies’ recommended
flows for during early October would provide 87 percent of existing spawning WUA for
coho and 83 percent of existing spawning WUA for sockeye. Coho are the only salmonid
species in Grant Creek that spawns during the second half of October, and the proposed
and recommended minimum flows would provide 70 percent of existing coho spawning
WUA during this period (table 3-22, below).
Kenai Hydro’s proposed and the resource agencies’ recommended minimum flows
would increase the spawning WUA for Dolly Varden compared to existing conditions,
except during early November when the amount of spawning WUA would decrease by 4
percent compared to existing conditions (figure 3-17). Kenai Hydro’s proposed and the
resource agencies’ recommended minimum flows regimes would have very little effect
on rainbow trout spawning, with the greatest changes resulting from proposed and
recommended minimum flows during late May, decreasing the amount of existing
spawning WUA by up to 13 percent (table 3-22).
While Kenai Hydro’s proposed and the resource agencies’ recommended
minimum flows would all decrease the amount of spawning WUA for Chinook, coho,
and sockeye (table 3-22), as noted above, inflow during the late summer when the
reservoir is full would still typically exceed the project’s turbine capacity, resulting in
flows below the tailrace that are the same as current conditions. Once the reservoir is
full, flows are expected to exceed the 385 cfs turbine capacity beginning in mid-July and
remain above this level until September in an average year. These periods when flow in
excess of the turbine’s capacity are spilled into the bypassed reach would likely maintain
habitat connectivity and movement for salmonids to their spawning locations.
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Figure 3-17. Estimated weighted usable area for Chinook, coho, and sockeye salmon and
Dolly Varden and rainbow trout spawning and incubation under proposed
minimum flows and existing average monthly flows in the Grant Creek
anadromous reach (Source: staff).
0
10000
20000
30000
40000
50000
60000
August SeptemberWUAChinook Spawning
0
5000
10000
15000
20000
25000
30000
35000
September Oct 1 –15 Oct 16 –31WUACoho Spawning
0
5000
10000
15000
20000
25000
30000
35000
August September Oct 1 –15WUASockeye Spawning
40000
41000
42000
43000
44000
45000
46000
47000
Aug Sept Oct 1 –
15
Oct 16
–31
Nov 1 –
15WUADolly Varden Spawning
38000
40000
42000
44000
46000
48000
50000
May 16 –31 June 1 –15 June 16 –30WUARainbow Trout Spawning
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The instream flow study results indicate that reducing existing average monthly
flows from the natural hydrograph to Kenai Hydro’s proposed flows would decrease the
Chinook fry rearing WUA from 73 percent (June 1–July 15), to 89 percent in late May,
with an average of 81 percent over the mid-May through August period (figure 3-18,
table 3-22). Kenai Hydro’s proposed flows would decrease the existing coho fry rearing
WUA to 73 percent in June and September, and to 87 percent in July, with an average of
81 percent between May and October. Dolly Varden fry rear in Grant Creek from mid-
May through September, and fry rearing WUA would decrease to an average of 85
percent of existing over this period. Rainbow trout rear in Grant Creek year-round, and
under Kenai Hydro’s proposed minimum flows would experience an increase in fry
rearing WUA from November through early May, with a maximum increase in March
and April (113 percent) and a decrease in fry rearing WUA from mid-May through
October, with a low of 72 percent of existing WUA in June and September.
Juvenile Chinook and coho salmon, Dolly Varden, and rainbow trout rear in Grant
Creek year-round. Consequently, these species would experience a decrease in juvenile
rearing WUA during low water years in the summer (June through October), when flows
would be limited to the proposed minimum instream flows, and would be much less than
the existing flows due to spring runoff being retained in the reservoir. Juvenile salmonids
would also experience an increase in WUA in the winter in almost all water years, when
the project would supply a steady minimum flow, providing flow to side channels that
would normally be dry or frozen (figure 3-19, table 3-22). Adult Dolly Varden and
rainbow trout rear in Grant Creek in the summer and fall. In normal years, these species
would experience a decrease in WUA during late May and June as the reservoir was
filling (about 85 percent of WUA under existing flows), and no change from existing
conditions about July through October) when the reservoir was full and the proposed
project was running at capacity. However, these species would experience a decrease in
adult rearing WUA throughout their adult rearing period in low water years (figure 3-20,
table 3-22).
Based on the above analysis, Kenai Hydro’s proposed and the agency-
recommended minimum flows throughout the year would likely maintain existing
fisheries resources in Grant Creek because they would provide more than 80 percent of
existing WUA for Chinook, coho, sockeye, rainbow trout, and Dolly Varden spawning;
Chinook, coho, rainbow trout, and Dolly Varden juvenile and fry rearing; and rainbow
trout and Dolly Varden adult rearing, even in low water years, and maintain access to
spawning habitat in all of Reach 1 for pink salmon in August. Kenai Hydro’s proposed
minimum flows would provide an average of 88 percent of existing WUA for all species
and life stages present in Grant Creek.
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Figure 3-18. Estimated weighted usable area for Chinook and coho salmon and Dolly
Varden and rainbow trout fry rearing under proposed minimum flows and
existing average monthly flows in the Grant Creek anadromous reach
(Source: staff).
0
50000
100000
150000
200000
May 16
–31
June 1
–15
June 16
–30
July 1
–15
July 16
–31
AugWUAChinook Fry Rearing
0
20000
40000
60000
80000
100000
120000
May 16
–31
June 1
–15
June 16
–30
July 1
–15
July 16
–31
Aug Sept Oct 1
–15
Oct 16
–31WUACoho Fry Rearing
0
50000
100000
150000
200000
May 16
–31
June 1
–15
June 16
–30
July 1
–15
July 16
–31
Aug SeptWUADolly Varden Fry Rearing
0
20000
40000
60000
80000
100000
120000
Jan Feb Mar April May
1
- 15
May
16
–31
June
1
–15
June
16
–30
July 1
–15
July
16
–31
Aug Sept Oct 1
–15
Oct
16
–31
Nov
1
–15
Nov
16
–30
DecWUARainbow Trout Fry Rearing
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Figure 3-19. Estimated weighted usable area for Chinook and coho salmon and Dolly
Varden and rainbow trout juvenile rearing under proposed minimum flows
and existing average monthly flows in the Grant Creek anadromous reach
(Source: staff).
0
20000
40000
60000
80000
100000
Jan Feb Mar April May
1
- 15
May
16
–31
June
1
–15
June
16
–30
July 1
–15
July
16
–31
Aug Sept Oct 1
–15
Oct
16
–31
Nov
1
–15
Nov
16
–30
DecWUAChinook Juvenile Rearing
0
50000
100000
150000
200000
Jan Feb Mar April May
1
- 15
May
16
–31
June
1
–15
June
16
–30
July
1
–15
July
16
–31
Aug Sept Oct 1
–15
Oct
16
–31
Nov
1
–15
Nov
16
–30
DecWUACoho Juvenile Rearing
0
50000
100000
150000
200000
Jan Feb Mar April May
1
- 15
May
16
–31
June
1
–15
June
16
–30
July 1
–15
July
16
–31
Aug Sept Oct 1
–15
Oct
16
–31
Nov
1
–15
Nov
16
–30
DecWUADolly Varden Juvenile Rearing
0
50000
100000
150000
Jan Feb Mar April May
1
- 15
May
16
–31
June
1
–15
June
16
–30
July 1
–15
July
16
–31
Aug Sept Oct 1
–15
Oct
16
–31
Nov
1
–15
Nov
16
–30
DecWUARainbow Trout Juvenile Rearing
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Figure 3-20. Estimated weighted usable area for Dolly Varden and rainbow trout adult
rearing under proposed minimum flows and existing average monthly flows
in the Grant Creek anadromous reach (Source: staff).
0
20000
40000
60000
80000
100000
June 1
–15
June 16
–30
July 1
–15
July 16
–31
Aug Sept Oct 1
–15
Oct 16
–31
Nov 1
–15
Nov 16
–30WUADolly Varden Adult Rearing
0
20000
40000
60000
80000
May 16
–31
June 1
–15
June 16
–30
July 1
–15
July 16
–31
Aug Sept Oct 1
–15
Oct 16
–31WUARainbow Trout Adult Rearing
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Table 3-22. Estimated weighted usable area for all species and life stages of salmonids
under Kenai Hydro-proposed and FWS-, NMFS-, Alaska DFG-
recommended minimum flows in the Grant Creek anadromous reach
(Source: staff).
Life stage Period
Average WUA % of Existing
Conditions
Chinook
Spawning August–September 83
Fry rearing May 16–August 81
Juvenile rearing Year-round 86
Coho
Spawning September–October 82
Fry rearing May 16–October 81
Juvenile rearing Year-round 93
Sockeye
Spawning August–Oct 15 84
Rainbow Trout
Spawning May 16–June 96
Fry rearing Year-round 92
Juvenile rearing Year-round 91
Adult rearing May 16–October 80
Dolly Varden
Spawning August–November 15 101
Fry rearing May 16–September 85
Juvenile rearing Year-round 96
Adult rearing June–November 93
Average all species and life stages 88
Ramping Rates
Rapid changes in streamflows associated with hydroelectric project operation have
the potential to adversely affect aquatic resources. If water recedes in a project-affected
reach faster than what would occur naturally (e.g., from changes in generation,
emergency shutdowns), adverse effects can include stranding of fish in shallow, low-
gradient gravel bar areas and off-channel habitat; temporary loss of fish habitat or loss of
habitat access; and the dewatering of amphibians, aquatic insects, and plant life (Hunter,
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1992). Rapid changes in streamflows also can affect fish behavior leading to reduced
spawning success (Bauersfeld, 1978). Fry and juvenile fish less than 2 inches long are
normally the most vulnerable to stranding because of their weak swimming ability;
preference for shallow, low-velocity habitat such as edge-water and side channels; and a
tendency to burrow into the substrate to hide. Limits governing the rate and timing of
project-induced stage changes (ramping rate restrictions when operational control exists)
are often established at hydroelectric projects to protect aquatic organisms (Hunter, 1992;
Olson, 1990).
Alaska DFG (10(j) recommendation 3), FWS (10(j) recommendation 3), and
NMFS (10(j) recommendation 3) each recommend Kenai Hydro operate the proposed
project to avoid sudden changes (either increases or decreases) in the flow in Grant
Creek. They further recommend that ramping rates vary depending on the time of year.
Maximum downramping rates would be limited to a year-round maximum of 1 inch per
hour (when operational control exists), and maximum upramping would be limited 1 inch
per hour during the winter (November 16 through May 15), and 2 inches per hour during
the summer (May 16 through November 15). The agencies state their recommended rates
are similar to those suggested in the scientific literature (Hunter, 1992) and are consistent
with existing rates of stage change in Grant Creek. Additionally, Alaska DFG (10(j)
recommendation 5) recommends Kenai Hydro use a gage downstream of the project
tailrace as the compliance point for ramping rates.
In response to these recommendations, Kenai Hydro agreed to implement a set of
ramping rate restrictions that are similar with the resource agencies’ recommendations;
however, Kenai Hydro proposes a maximum downramping rate of 2.25 inches per hour
from May 16 through November 15 to better reflect Grant Creek’s current characteristics.
Kenai Hydro also disagrees with Alaska DFG’s recommended ramping rate compliance
location and proposes to monitor ramping at a gage in the project tailrace.
Our Analysis
Even though the proposed project would be operated with infrequent ramping
events, any rapid changes in streamflows associated with project start-ups or shutdowns
could adversely affect aquatic resources in Grant Creek. For example, project start-ups
could suddenly decrease the amount of water in the bypassed reach and strand fish and
other aquatic biota. A rapid shutdown could also suddenly decrease the amount of flow
immediately downstream of the powerhouse and rapidly increase the amount of flow in
the bypassed reach.
The resource agencies’ upramping rate recommendations are two times greater
than the steepest rate of change observed in the 2013 to 2014 discharge record when
15-minute data are available. The recommended upramping rate is more restrictive in the
winter when eggs and alevins are at risk of mortality due to being flushed from the gravel
by a rapid increase in stage. Maintaining ramping rates in line with current changes in
stage would help maintain fish productivity and historical habitat conditions in Grant
Creek. The resource agencies state that their recommended ramping rates would support
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Kenai Hydro’s intent that operation of the Grant Lake Project would have either a neutral
or a positive effect on fish and fish habitat.
In an evaluation of the resource agencies’ ramping rate recommendation, Kenai
Hydro analyzed all significant downramping events that occurred in Grant Creek during
the period of record (May 31, 2013, through October 10, 2014) and found 54 separate
hourly stage decreases in excess of 1 inch per hour. The maximum stage decreases
during the period of record was 2.76 inches per hour (figure 3-21, table 3-23). However,
these data were recorded with a gage that was not encased in a stilling basin, and analysis
was conducted to minimize outliers.54 Subsequently, the maximum stage decrease is
calculated, not observed, but is expected to be indicative of current conditions. Surveys
were not conducted during these downramping events to assess the rate of stranded fish.
It is expected that the aquatic resources in Grant Creek are accustomed to the variability
that occurs under current conditions, and downramping rates with these magnitudes with
this frequency would not cause significant effects on the fish and macroinvertebrate
species present.
Kenai Hydro also proposes to use the project occasionally for peaking generation
when demand dictates, which is not defined in its amended final license application;
however, Kenai Hydro indicates it would occur only during the winter and not in the
summer. No overlap occurs between the proposed peaking operations in the “winter,”
which is presumed to be January through April, and the period of higher rate of
downramping proposed by Kenai Hydro.
The resource agencies’ downramping and upramping rates would likely eliminate
any sudden changes in flow in Grant Creek and therefore would protect aquatic
resources. Because the natural hydrograph regularly experiences downramping rates
approaching 2.75 inches per hour (and that the local fish populations have adapted these
natural fluctuations), Kenai Hydro’s proposed rates, which (as noted above) are less
restrictive than the agency-recommended rates, would also adequately protect aquatic
resources in the project-affected reaches of Grant Creek.
Regarding the Alaska DFG recommended and Kenai Hydro proposed compliance
locations for ramping monitoring, stage measurements recorded in Grant Creek
downstream from the tailrace, as Alaska DFG recommends, would best reflect project-
related effects on aquatic resources. We note that the project would also modify flows in
the bypass, which would contribute to stage change below the tailrace. Although the
magnitude of these changes relative to flows through the powerhouse would be small and
have little contribution to ramping rates downstream of the tailrace, the dimensions of the
tailrace do not reflect existing Grant Creek contours and would not provide an accurate
assessment of ramping rates observed in reaches downstream of the project.
54 See draft environmental impact statement meeting transcripts, filed January 9,
2019 (accession number 20190109-4006).
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Figure 3-21. Downramping events in Grant Creek that were greater than 1 inch per hour during the period of record, May
31, 2013, through October 10, 2014 (Source: Kenai Hydro, 2018b, as modified by staff).
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Table 3-23. Number of stage changes greater than 1 inch per hour and maximum hourly
stage difference in inches in Grant Creek, May 31, 2013, through October
10, 2014 (Source: Kenai Hydro, 2018b).
Date
Number of Stage
Decreases > 1 Inch/Hour
Max Hourly Stage
Difference (inch)
2013
May 31–June 7 19 -2.76
June 19–June 25 12 -1.56
July 2–July 5 2 -2.04
Aug 12–Aug 19 6 -1.44
September 11–September 24 4 -1.68
October 30–November 8 1 -1.20
2014
July 12–July 18 3 -1.20
August 15–August 23 4 -1.36
September 20–October 10 3 -1.44
Sediment Management
Operation of the project would result in reduced flows in the proposed bypassed
reach and could potentially reduce the rate and volume of sediment recruited and
transported into the lower reaches of Grant Creek. This reduction in sediment
recruitment and transport could affect the distribution and availability of suitable
spawning substrate (gravel) for resident and anadromous salmonids.
Under existing conditions, Grant Creek is a sediment limited fluvial environment.
As discussed in section 3.3.1.1, the primary process for generating new bedload sediment
in Grant Creek is the erosional force from high flows (flows as high as 2,140 cfs have
been recorded) that incise the canyon walls in Reaches 5 and 6, causing wall undermining
and mass wasting (rockfall) from the canyon walls and exposing the geology to surface
erosion processes. The biologically significant transport of sediment from Reaches 5 and
6 is limited but what does occur likely takes place during seasonal high flow events. As a
result of the limited availability of spawning gravel, salmonid spawning in Grant Creek is
opportunistic and occurs where suitable substrates are found, with less emphasis on
appropriate water depths and velocities.
To minimize effects on spawning habitat from reduced flows in the bypassed
reach and the reduction of erosion potential and sediment transported downstream to the
anadromous reach, Kenai Hydro proposes to provide channel maintenance flows
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consistent with Alaska DFG (10(j) recommendation 4), FWS (10(j) recommendation 4),
and NMFS (10(j) recommendation 4). Alaska DFG and NMFS recommend Kenai Hydro
provide channel maintenance flows in 2 years in the previous 10-year -period, updated
annually. FWS recommends Kenai Hydro provide channel-maintaining flows a
minimum of two times (separated by at least 24 hours) in the previous 10-year period,
updated annually.
Channel maintenance flows, as recommended by the resource agencies, consist of
an average discharge of 800 cfs to the bypassed reach for a minimum of 8 hours. NMFS
and FWS recommend that a flow event that exceeds 800 cfs for at least 1 hour, but less
than 8 hours, may be counted as a channel maintenance flow if the project reduces flows
at the powerhouse to zero in an attempt to comply with this provision. Alaska DFG
recommends that flows must exceed 800 cfs for at least 2 hours to be counted as a
channel maintenance flow. NMFS, FWS, and Alaska DFG recommend Kenai Hydro
measure channel maintenance flows by subtracting penstock or powerhouse flows from
Grant Creek flows measured at ST-2 (GC200).
In the event that the channel maintenance flows are not delivered as proposed,
NMFS, FWS, and Alaska DFG recommend Kenai Hydro operate the project to ensure
that Grant Lake is at the maximum reservoir level of 703 feet by September 1 and operate
the project to maintain that reservoir level for the month of September.
Our Analysis
As described above, a reduction in peak flows in the proposed bypassed reach has
the potential to degrade spawning substrate quantity and quality in lower Grant Creek as
a result of: (1) coarsening surface bedload, (2) increased armoring and pavement depth,
(3) decreased geomorphic channel form complexity, and (4) decreased quantity of
channel bedforms. Kenai Hydro’s proposed monitoring would determine whether any
degradation occurs from project operation and would provide data to modify project
operation in the future, if needed.
Anadromous and resident fish of Grant Creek are adapted to current conditions in
Grant Creek, which reflect a limited sediment supply. Channel maintenance flows
provided through the bypassed reach would mimic the natural hydrograph and better
reflect the existing processes of spawning substrate movement than gravel augmentation.
The major source of sediment in Grant Creek is high flow that erodes the canyon
walls in Reaches 5 and 6, causing rockfall from the canyon walls and exposing the
underlying geology to surface erosion processes. Mobilization of sediment in Grant
Creek results when very high flows flush sediment from Reaches 5 and 6 into the lower
reaches of Grant Creek where anadromous fish spawning occurs. Using the effective
discharge concept, Alaska DFG and Kenai Hydro determined that 80 percent of bankfull
flow (1,000 cfs) would provide flows strong enough to mobilize sediments and promote
bedform creations. An analysis of the hydrologic record showed that flow events of this
800 cfs or greater would have occurred 12 times during the 66-year period (Biotic
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Monitoring Plan), all of which occurred during the months in which the reservoir would
be full under proposed operation (July, August, and September); flows greater than 800
cfs occur approximately 5 percent of the time in September (Kenai Hydro, 2018a). Kenai
Hydro should be able to achieve this magnitude and frequency of channel maintenance
flows. However, given the discrepancy between the recorded maximum flow in Grant
Creek (2,140 cfs), the proposed channel maintenance flows, it is unlikely the channel
maintenance flows would be successful at maintaining the current rate of sediment
recruitment from Reaches 5 and 6.
Reduced flows in the bypassed reach would reduce sediment recruitment from the
bypassed reach and reduce sediment transport to downstream reaches in Grant Creek,
which could impair spawning gravels downstream. Channel maintenance flows of 800
cfs, provided on a regular basis and adaptively managed for magnitude, duration, and
frequency as recommended by the agencies would limit the effects of the project on
sediment recruitment and transport in a manner that may be similar to the existing
conditions to retain downstream fish spawning habitat, but the success of these flows is
unknown. Measuring flows in Grant Creek at ST-2 (GC200) and subtracting flows from
the powerhouse would accurately measure the timing and duration of channel
maintenance flows.
Effects of Operation on Transport of Biological Materials
As discussed in section 3.3.2.2, in the Sediment Management subsection, operation
of the proposed project would result in reduced flows in the bypassed reach and could
potentially reduce the rate and volume of biological materials transported into the lower
reaches of Grant Creek, including large wood, macroinvertebrates, and nutrients. This
reduction in biological material transport could affect the distribution and availability of
suitable rearing habitat for resident and anadromous salmonids.
Kenai Hydro does not propose and no entity recommends measures to monitor,
mobilize, or retain LWD, macroinvertebrates, or nutrients in Grant Creek.
Our Analysis
Under existing conditions, Grant Creek is a higher gradient, very flashy stream,
where high flows and velocities limit the amount of large wood in the system because of
limited collection points. Aquatic macroinvertebrates and nutrients, while found
throughout Grant Creek, are flushed through the system by high summer flows. Most
wood is found in the Reach 2/3 side channels and the Reach 1 distributary, where flows
are reduced and protected from the main discharges in Grant Creek. High flows in the
main channel of Grant Creek move large wood, macroinvertebrates and nutrients
downstream and eventually into the Upper and Lower Trail Lakes.
A reduction in peak flows in the proposed bypassed reach has the potential to
degrade fish habitat quantity and quality in lower Grant Creek from reduced wood,
macroinvertebrate, and nutrient transport from the bypassed reach to Grant Creek below
the tailrace. However, anadromous and resident fish of Grant Creek are adapted to its
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current conditions, which reflect a limited wood and nutrient supply. Transport of wood
in Grant Creek results when very high flows flush wood from Reaches 5 and 6 into the
lower reaches of Grant Creek where wood deposition occurs in lower velocity side
channels and the Reach 1 distributary. These same high flows move woody debris in the
main channel downstream and eventually into the Upper and Lower Trail Lakes.
Transport of wood from the bypassed reach downstream is expected to continue
due to the implementation of channel maintenance flows as recommended by the
resource agencies (FWS 10(j) recommendation 4, NMFS 10(j) recommendation 4, and
Alaska DFG 10(j) recommendation 4) (see section 3.3.2.2, Sediment Management).
Under these recommendations, channel maintenance flows of 800 cfs would be provided
in 2 years of every 10 years, updated annually, to move sediment from Reaches 5 and 6
downstream. These flows would be achievable by the project, and would be adequate to
also move pieces of LWD. Therefore, channel maintenance flows provided through the
bypassed reach would mimic the natural hydrograph, and contribute to the movement of
wood and other resources, such as macroinvertebrates and nutrients.
However, the expected reduction in peak flows in Grant Creek below the tailrace
in spring (see figure 3-7) has the potential to lower velocities in the main channel. These
reduced velocities may contribute to a higher retention rate of large wood in Grant Creek
until channel maintenance flows occur and flush wood through the system. Wood
retained in the main channel has the potential to create and maintain new stream habitat
by creating pool habitat for fish, maintain connectivity between the main channel and
side channels, retain spawning gravel, and provide cover for aquatic species. Existing
habitat could be disrupted, and channel-spanning logjams may create fish passage
barriers while they are retained in the system. These same impacts can result from
natural accumulations of wood under current conditions, and channel maintenance flows
of adequate magnitude, duration, and frequency are expected to maintain natural habitat
forming processes in Grant Creek.
Channel maintenance flows of 800 cfs provided on a regular basis, and adaptively
managed for magnitude, duration, and frequency as recommended by the agencies and
proposed by Kenai Hydro, would move large wood, macroinvertebrates, and nutrients
from Reaches 5 and 6 to the lower reaches in a manner similar to existing conditions to
retain downstream fish rearing habitat, and lower peak flows below the tailrace in spring
may contribute to higher retention rates of wood in the main channel and increase fish
habitat forming structures until the next channel maintenance flow event.
Effects of Spinning Reserve and Load Following on Aquatic Resources and
Habitat in Grant Creek
Potential effects of spinning reserve and load following operations on fish and
macroinvertebrates could be the loss of habitat within the width of the stream margin that
are periodically exposed during the up-ramp and down-ramp flow cycle; cycles of
increased and decreased drift during the up-ramp and down-ramp cycle, potentially
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reducing macroinvertebrate standing crop in permanently wetted areas; alterations in the
macroinvertebrate community structure that favor more mobile rather than sessile
(attached or not freely moving) organisms; and stranding and/or trapping of fry and
juvenile fish and drifting macroinvertebrates within the stream margin zone during the
down-ramp period (Reiser et al., 2006).
Kenai Hydro proposes to increase power benefits by taking advantage of spinning
reserve and load-following operations (peaking). To prevent a sudden increase in the
water surface levels of Grant Creek as a result of the increased flows generated by these
operations, Kenai Hydro would divert the additional powerhouse flows into the detention
pond and then slowly release water from the pond back into Grant Creek via the tailrace
channel. Kenai Hydro proposes to use spinning reserve and load-following infrequently,
and mainly in the winter and shoulder months, when generators are not running at
capacity. Kenai Hydro does not propose and no entity recommends a schedule describing
how frequently spinning reserve and load-following operations would occur.
Our Analysis
As discussed above, project operation may include spinning reserve and load-
following operations. The magnitude of the effects of these operations on fish and
macroinvertebrates, if any, would be based on, among other things, the rate of change of
flow in downstream reaches.
As discussed in section 3.3.2.2, in the Ramping Rates subsection, maintaining
ramping rates in line with existing changes in stage would help maintain fish productivity
and current habitat conditions in Grant Creek.
The operational aspects of spinning reserve and load following operations are
proposed to be primarily in the winter and shoulder months, when generation is not at
capacity. During this season, both upramping and downramping would be limited by the
proposed and recommended 1 inch per hour. Under the proposed ramping rates, spinning
reserve and load-following operations of the proposed project are not expected to have an
adverse impact on the project-affected reaches of Grant Creek.
Effects of Project Operation on Macroinvertebrates
Aquatic macroinvertebrates are commonly used as an indicator of the biological
health of streams. Their distribution and relative abundance are affected by a variety of
naturally occurring and human-induced factors, including the annual hydrologic cycle,
the timing and magnitude of spring outflows, streambed substrate composition, channel
gradient, bank erosion and sediment deposition, pollution, and riparian habitat
degradation. Taxa that are especially sensitive to disturbance are considered intolerant;
therefore, their absence in a particular stream or river could indicate poor water quality.
Other taxa are tolerant of disturbance, heavy sedimentation, and poor water quality.
Many of the tolerant taxa are the first to reestablish an area after a scouring event or
habitat disruption.
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Kenai Hydro does not propose and the resource agencies do not recommend any
measures to monitor macroinvertebrates in Grant Lake, Grant Creek, Upper Trail Lake,
or Trail Lake Narrows.
Our Analysis
Macroinvertebrates have several characteristics that make them potentially useful
indicators of water quality and overall stream health. They are relatively non-mobile, and
thus well suited for assessing site-specific effects. They are also abundant in most
streams, and sampling is relatively easy and inexpensive. Finally, the sensitivity of
aquatic insects to habitat changes makes them excellent indicators of overall
environmental quality. However, macroinvertebrate assemblages often exhibit a high
degree of natural variability within or between sample sites, sample seasons, and sample
years. In 2013, Northern Ecological Services (2014) found that macroinvertebrates were
mostly healthy throughout Grant Creek, and typical of cold, glacial fed streams. In Grant
Creek, the macroinvertebrate populations comprise taxa that have a low tolerance for
water quality impairment but can also thrive where the growing season is short and
streamflows are variable.
As noted above, water quality is similar between Grant Lake and Grant Creek;
therefore, project operation would have little effect on the water chemistry of Grant
Creek. As discussed in section 3.3.2.2, in the Effects of Project Operation on Water
Quality subsection, Kenai Hydro would manage water temperature in Grant Creek to
limit changes from current annual variations, which would prevent changes to this critical
habitat parameter for macroinvertebrates. Project operation would alter the flow regime
of Grant Creek and Kenai Hydro would manage and implement proposed mitigation
measures, including minimum instream flows in the bypassed reach, minimum instream
flows below the tailrace, ramping rates, and channel maintenance flows for sediment,
nutrient, and LWD transport through the bypassed reach. With these measures in place,
the bypassed reach of Grant Creek would experience significant decreases in flow
annually except during the summer when the lake is full, and Grant Creek below the
tailrace would experience an elevated base flow in the winter, a reduction in peak flows
in June, and similar conditions in the summer.
Kenai Hydro’s proposed minimum instream flows would keep the bypassed reach
wetted year-round, which would allow the continued persistence of macroinvertebrates in
this area, but would decrease the amount of available habitat when flows are limited to
minimum releases. As discussed in section 3.3.2.2, in the Effects of Project Operation on
Water Temperature subsection, in contrast to Kenai Hydro’s water temperature data
collected in 2013, the bypassed reach may have water temperatures that are about 1°C
cooler in April, 1°C warmer in May, slightly warmer in June (average of 0.1°C), and on
average 0.5 to 0.9°C warmer in July through September. Elevated temperatures in late
summer may approach the thermal optima for some macroinvertebrate taxa and may be
warmer than optimal for more sensitive taxa in Grant Creek, such as mayflies Baetis,
Brunella, and Ephemerella (EPA, 2006). However, the taxa present in Grant Creek are
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generally adapted to the temperature variability in cold, glacial streams that experience
cold nights and warm days in the summer months. The reduction in peak flows in the
bypassed reach in spring would allow for continued growth and development of
macroinvertebrates, and could lead to larger populations that would later be transported
downstream by the channel maintenance flows prescribed in the summer. Downstream
of the tailrace in Grant Creek, elevated flows in the winter would increase wetted
perimeter and available habitat for macroinvertebrates. Reduced flows in the spring
could create habitat conditions that are favorable for macroinvertebrates, as they would
not be subject to higher velocities, and summer flows are expected to be the same. For
these reasons, project operation would not have a significant effect on aquatic insects.
Kenai Hydro proposes to increase power benefits by taking advantage of spinning
reserve and load-following operations (peaking). To prevent a sudden increase in the
water surface levels of Grant Creek as a result of the increased flows generated by these
operations, the additional powerhouse flows would be diverted into the detention pond
and then released slowly back into Grant Creek via the tailrace channel that flows into
Grant Creek. Kenai Hydro proposes to use spinning reserve and load-following
infrequently, mainly in the winter. While operating in a spinning reserve or load-
following mode, Kenai Hydro would implement certain ramping rates to protect aquatic
resources from sudden changes in flows. As discussed above, the proposed ramping rates
would protect aquatic resources in Grant Creek.
In summary, Kenai Hydro’s proposed mitigation measures, including: minimum
instream flows in the bypassed reach; ramping rates; channel maintenance flows for
sediment, nutrient, and large wood passage through the bypassed reach; and the ESCP,
hazardous material plan, a construction water quality monitoring plan, and a blasting plan
during construction, would adequately protect macroinvertebrate resources in Grant
Creek during operation and construction of the proposed project.
Grant Creek Tailrace Barrier
The discharge of a hydroelectric facility turbine can create artificial hydraulic
conditions that may attract fish. Fish attracted to these discharges could also swim into
the project’s turbines through the draft tubes where they could be injured or killed from
turbine blade strike. Fish exclusion devices installed downstream of a powerhouse
discharge can be used to physically block upstream migrating fish from entering the draft
tubes and guide fish away from the powerhouse.
Consistent with Alaska DFG (10(j) recommendation 7), FWS (10(j)
recommendation 7), and NMFS (10(j) recommendation 7), Kenai Hydro proposes to
install a fish exclusion structure in the proposed tailrace channel about 85 feet
downstream of the powerhouse to prevent fish from reaching the powerhouse. Kenai
Hydro states that its picket-style fish barrier would meet NMFS criteria and would be
made of 0.75-inch vertical pickets with 1-inch bar clear spacing. The picket barrier final
design would be developed in collaboration with NMFS technical representatives. As
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part of preparation of final design plans and specifications, Kenai Hydro would refine the
design to provide an efficient hydraulic and fish exclusion operation considering barrier
orientation, length, and river flow conditions.
In its Tailrace Fish Barrier Design Approach Technical Memorandum (McMillen,
2017), Kenai Hydro provided a conceptual drawing and design specifications, indicating
the final design of the fish exclusion structure would be consistent with NMFS’s fish
passage criteria. Once completed, Kenai Hydro also indicated it would continuously
operate the structure during the anadromous fish migration period and remove the picket
panels when migrating fish are no longer present in Grant Creek. Kenai Hydro would
also continuously monitor the barrier via pressure transducers during operation to
determine debris loads and would regularly remove debris at the intake tower trashrack to
protect the turbine.
Our Analysis
Installation of a fish exclusion barrier downstream of the proposed powerhouse, as
proposed by Kenai Hydro and recommended by Alaska DFG, FWS, and NMFS, would
protect upstream migrating fish, including Chinook, coho, and sockeye salmon, from
entering the turbine draft tube and potentially suffering injury or mortality. All flows
passing through the turbines would be reintroduced to Grant Creek through the tailrace
barrier, and during most of the year, flows through the tailrace barrier would be greater
than flows through the bypass. This may provide a false attraction to the picket barrier
flows. However, as discussed in section 3.3.2.2, Effects of Project Operation on Aquatic
Habitat in the Bypassed Reach, the amount of habitat for anadromous fish upstream of
the barrier is minimal, and false attraction is not expected to be an issue.
Aquatic Habitat Enhancement Measures
As discussed in sections 3.3.1.2, Geologic and Soil Resources, Environmental
Effects, and 3.3.2.2, Aquatic Resources, Environmental Effects, in the Effects of Project
Construction on Water Quality subsection, construction and operation of the proposed
project could affect water quality and alter the amount of available salmonid spawning
and rearing habitat in Grant Creek.
In its amended final license application, Kenai Hydro proposes five environmental
measures to modify and/or enhance physical habitat in Grant Creek. These measures
include implementing its Biotic Monitoring Plan, enhancing the Reach 2/3 side channels
by implementing minimum flows downstream of the tailrace throughout the winter,
augmenting the amount of flow in the Reach 1 distributary, providing minimum instream
flows in the bypassed reach, and monitoring spawning gravel in Grant Creek.
Kenai Hydro’s proposed Biotic Monitoring Plan includes goals, objectives, and
methodologies for biotic monitoring during project construction and operation and during
the evaluation of its proposed enhancement and mitigation measures (see section 3.3.2.2,
in the Biotic Monitoring in Grant Creek subsection). Kenai Hydro’s proposes minimum
instream flows below the tailrace to provide consistent flow and wintertime inundation in
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the Reach 2/3 side channels and to increase the amount of juvenile salmonid rearing
habitat in lower Grant Creek. Kenai Hydro’s proposed removal of a sill consisting of
LWD and substrate that functions to control the amount of flow inundating the Reach 1
distributary is intended to provide greater and more consistent flow in the distributary,
increasing both rearing and spawning habitat. Its proposed assessment of the distribution
and abundance of gravel in the main stem and Reach 1 distributary relative to existing
conditions is designed to evaluate the need for gravel supplementation within the
mainstream and distributary and/or the periodic need for channel maintenance flows to
mobilize upstream sediment. Kenai Hydro’s proposed sediment management plan and
the resource agencies’ recommendations regarding sediment management are discussed
further in section 3.3.2.2, in the Sediment Management subsection.
In its section 10(j) recommendation 20, FWS disagrees with Kenai Hydro’s
proposed logjam removal measure in Reach 1. FWS’s preference is to reserve this action
as a potential mitigation option once results from biotic monitoring (winter minnow
trapping) are made available to better inform the proposal. In lieu of the mitigation
measure for gravel augmentation, FWS recommends Kenai Hydro collect genetic tissue
samples for species DNA analyses. We discuss FWS’s recommended DNA collections
below under the Biotic Monitoring Plan subsection.
Kenai Hydro’s response to FWS’s comments proposes to delay removing the
logjam, pending a review of initial monitoring data and to use the annual meeting review
process as the collaborative mechanism for decision making related to this topic.
Our Analysis
Kenai Hydro developed its proposed aquatic enhancement measures in
consultation with Alaska DFG, NMFS, and FWS and included monitoring associated
with these measures in its Biotic Monitoring Plan. However, one of the measures
proposed by Kenai Hydro and recommended by FWS lacks a clear project nexus.
Under current conditions, the Reach 2/3 side channels experience significant flow
fluctuations and inconsistent inundation, which restricts rearing habitat for resident and
anadromous species in Grant Creek. Increased flows through these side channels would
be achieved by adopting Kenai Hydro’s proposed minimum flows below the project’s
tailrace. These instream flows would provide more consistent and higher minimum flows
in the side channels during the winter. As part its instream flow study, Kenai Hydro
conducted modeling to evaluate changes in habitat in the Reach 2/3 side channels as a
result of project operation. These modeling results indicate that increasing minimum
flows to 60 cfs from January through April would increase the WUA for fry rearing for
rainbow trout and juvenile rearing for Chinook, coho, Dolly Varden, and rainbow trout
(figure 3-22), and would improve ecological functions, processes, and connectivity
necessary to sustain aquatic resources in the Reach 2/3 side channel.
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Figure 3-22. Adult and juvenile rearing WUA, Reach 3 side channels (Source:
McMillen, 2014).
The rearing WUA in the Reach 2/3 side channels would decrease by about
15 percent from existing conditions in November as flows decrease under the natural
hydrograph and would increase about 5 percent from December to February compared to
what is present under existing conditions. Kenai Hydro’s proposed and the resource
agencies’ recommended minimum flows in Grant Creek downstream of the tailrace are
discussed further in section 3.3.2.2, Aquatic Resources, Environmental Effects.
Under Kenai Hydro’s proposed operation, flows downstream of the tailrace are
expected to be higher than the proposed 60-cfs minimum flow throughout winter as a
result of Kenai Hydro’s desire to maximize generation. Observed flow downstream of
the tailrace is expected to be closer to 100 cfs in December, steadily decreasing to
approximately 75 cfs in April (see figure 3-7). These flows (in excess of 60 cfs) would
increase the amount of WUA for fry rearing by approximately 15 percent.
The upstream control (logjam) at the head of the Reach 1 distributary limits
inundation of the distributary to flows in Grant Creek of over 190 cfs. At Grant Creek
flows of about 200 cfs, flows in the Reach 1 distributary are limited to about 2 cfs. This
logjam complex developed after a log became entrenched and gathered additional pieces
of wood over time.
Kenai Hydro analyzed the available habitat in the Reach 1 distributary as part of
its instream study. The results show significant increases in the spawning, fry rearing,
and juvenile and adult rearing WUAs associated with increased flows in the distributary
(figure 3-23).
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Figure 3-23. Reach 1 distributary spawning, fry rearing, and juvenile/adult rearing WUA
(Source: Kenai Hydro, 2018a, as modified by staff).
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Under Kenai Hydro’s proposed flow regime, flows in Grant Creek would be
increased during the winter but would not exceed the 190 cfs required to inundate the
Reach 1 distributary. In this scenario, there would be no modification from current
conditions, and the distributary would not be wetted until flows exceed 190 cfs in late
spring.
Implementation of the logjam removal would increase habitat available to aquatic
resources in Grant Creek and improve ecological processes and connectivity in the Reach
1 distributary. However, removal of this logjam would modify an existing natural feature
that would not be influenced in any way by the proposed project. Large wood is known
to provide important habitat for aquatic organisms, including slowing the flow of water,
collecting gravel for spawning, providing refuge for various life stages of fish and habitat
for macroinvertebrates, and to contributing to overall habitat complexity. Therefore, this
proposed enhancement measure to provide additional aquatic habitat is unnecessary.
FWS’s recommendation to collect tissue samples of live adult salmonids in Grant
Creek for genetic analysis would improve the existing genetic baselines for these species
in the Kenai Basin. However, there is no project-related purpose for requiring a license
condition stipulating that Kenai Hydro collect tissue samples for genetic analysis. In
addition, we anticipate that Kenai Hydro’s proposed and the resource agency’s
recommended measures including minimum flows in both the bypassed reach and
downstream of the tailrace, ramping rates, channel maintenance flows, and
implementation of an ESCP, a hazardous material plan, a construction water quality
monitoring plan, and a blasting plan during construction would adequately protect aquatic
habitat and aquatic resources in Grant Creek. Therefore, we cannot envision a scenario
where project construction and operation, with protection and enhancement measures
included in any license issued for the project, would result in a significant change in
genetic structure of the salmonid populations in Grant Greek. Further, general
monitoring of population genetics would not necessarily isolate any project-specific
effects on the resource. Consequently, we find that any monitoring data would provide
no benefits from a project-related perspective.
Biotic Monitoring in Grant Creek
Any license issued for the proposed project could include a number of measures
that would alter aquatic habitat conditions in Grant Creek. These altered habitat
conditions have the potential to affect the distribution and abundance of resident and
anadromous salmonids and benthic macroinvertebrates in Grant Creek and reduce the
rate and volume of sediment (spawning gravel) being transported through the system.
Construction of the proposed project facilities (i.e., penstock, powerhouse, tailrace,
detention ponds, and roads) could also cause habitat alteration due to sedimentation and
erosion, or through the accidental release of contaminants into project area waterbodies.
Kenai Hydro’s proposed protection, mitigation, and enhancement measures, which
include providing additional flow into the Reach 2/3 side channels, augmenting the flows
in the Reach 1 distributary, and implementing spawning gravel augmentation and channel
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maintenance flows could benefit fish and benthic macroinvertebrate production in Grant
Creek (see section 3.3.2.2, in the Sediment Management subsection).
To monitor project effects on biotic resources and efficacy of protection and
mitigation measures, Kenai Hydro proposes to implement its Biotic Monitoring Plan,
which documents the monitoring measures that Kenai Hydro proposes to implement
during project construction and through the initial phases of operation to evaluate the
effects of the project on aquatic resources. As outlined in the Biotic Monitoring Plan,
Kenai Hydro would conduct juvenile and adult salmonid investigations during year 1 of
construction and during years 2 and 5 of project operation. Kenai Hydro also proposes to
monitor the effects of proposed aquatic habitat enhancement measures (discussed above
in Aquatic Habitat Enhancement Measures subsection), which include juvenile and adult
salmonid use of the Reach 1 distributary and Reaches 2/3 side channels, and to conduct
gravel monitoring prior to construction and in years 5 and 10 of operation to determine
the need for gravel supplementation and channel maintenance flows. These measures are
discussed in detail below in the Salmonid Monitoring and Gravel Monitoring and
Augmentation sub-sections.
FWS 10(j) recommendation 9 recommends Kenai Hydro modify its Biotic
Monitoring Plan to include adaptive management strategies and provisions for how any
determined need for operational changes would be incorporated into the project. In
addition, FWS recommends the plan include specific, measurable, achievable, realistic,
and time-bound (SMART) objectives, but specific objectives were not provided.
Finally, Alaska DFG and FWS 10(j) recommendations 18 recommend that Kenai
Hydro hold annual consultation meetings with the agencies to review study and
monitoring reports and compliance with license articles. Forest Service final 4(e)
condition 4 specifies that Kenai Hydro conduct annual meetings with agencies to discuss
measures needed to ensure protection and use of NFS lands and resources affected by the
project.
In response to comments, Kenai Hydro states annual meetings with stakeholders
and FERC to review all management plans and related monitoring efforts associated with
construction and subsequent operation of the Project are included in each monitoring plan
submitted with the project. Kenai Hydro states that they would be amenable to either
adhering to the annual compliance meeting proposed in their monitoring plans, or
modifying it to allow for an annual meeting to take place by April 15 (as proposed by
Alaska DFG) with the later filing of a Final Annual Compliance Report.
Our Analysis
Detailed analysis of the Biotic Monitoring Plan’s juvenile and adult salmonid
monitoring and gravel monitoring and augmentation area are presented in the following
subsections.
Regarding agency recommendations for an annual project review, adaptive
management, and consultation meeting, while we have no objection to such meetings, we
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note that the Commission’s review process for study and monitoring reports includes a
mechanism for agency review and comment. Therefore, it is not clear what additional
benefit the meeting would provide to support aquatic resource management. FWS
recommends that Kenai Hydro include SMART objectives in its Biotic Monitoring Plan,
but without supplying specific objectives, there is nothing to analyze.
Salmonid Monitoring
During construction of the project, Kenai Hydro proposes to focus its monitoring
efforts on maintaining existing priority sites for spawning, incubation, and rearing.
Specifically, Kenai Hydro proposes to assess juvenile life stages using minnow traps in
early June and early August and evaluate adult life stages using a combination of visual,
redd, and carcass surveys. Kenai Hydro would conduct all three adult surveys three times
for each species during their peak spawning periods, for a total of 9 visual surveys, 9 redd
surveys, and 9 carcass surveys each year of sampling.
Once the project begins to operate, Kenai Hydro proposes to conduct additional
juvenile and adult surveys to document the effects of operation on aquatic resources and
to determine if its proposed enhancement measures are providing the additional habitat
that was predicted during the modeling exercises. Kenai Hydro would employ similar
methods to those used during construction monitoring including minnow traps, visual,
redd, and carcass surveys, and expand the juvenile monitoring to include snorkeling
surveys. Following completion of each monitoring year, Kenai Hydro proposes to
provide stakeholders with a summary of its findings in the annual compliance report. If a
stakeholder representative believed that the results of monitoring demonstrate that
construction activities were imposing deleterious effects on any life stage of Grant Creek
salmonids, that representative could call for a meeting to discuss what effects did exist
and what, if any, actions were necessary to remedy the effects.
Kenai Hydro’s Biotic Monitoring Plan also includes provisions to monitor the
effectiveness of its proposed aquatic resources measures. As described in the plan, Kenai
Hydro would assess juvenile salmonid abundance in the Reach 2/3 side channels during
the winter and evaluate juvenile and adult salmonid utilization in the Reach 1
distributary. This monitoring program would include minnow trapping and snorkel
surveys for juvenile salmonids, and visual surveys for adult spawners, redds, and
carcasses in the Reach 1 distributary and Reach 2/3 side channels. Kenai Hydro proposes
to conduct these surveys concurrently with construction monitoring to provide baseline
data prior to the implementation of its measures and would evaluate the effectiveness of
these measures in years 2 and 5.
FWS 10(j) recommendation 9 recommends Kenai Hydro add minnow trapping in
winter to monitor species occupancy, abundance, and habitat use in Grant Creek during
project construction and operation. NMFS believes that sampling in April, as proposed
by Kenai Hydro, is not indicative of true winter conditions.
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Alaska DFG comments that the schedule for the adult salmon surveys during
construction is inadequate and recommends five surveys for each species (for a total of
15 visual surveys, 15 redd surveys, and 15 carcass surveys each year) and that fisheries
sampling for both juveniles and adults should be carried out during the first two years of
project construction, not just the first year. Alaska DFG comments that the schedule for
monitoring activities during operation phase of the project should also be expanded from
two sampling days per species to five days per species. Alaska DFG recommends
expanding monitoring during operations from only years 2 and 5, to years 2, 5, 8, 11, and
14 to monitor several salmon life cycles.
In response to comments, Kenai Hydro stated that the Biotic Monitoring Plan was
developed in collaboration with the resource agencies during its development and
proposes that the current Biotic Monitoring Plan schedule represents an acceptable level
of effort and analysis.
In comments on the draft EIS, Alaska DFG and FWS note that project effects on
fish population dynamics would be isolated, to some extent, by comparing the fish
monitoring results for Grant Creek to the results of other fish population assessments in
the Kenai River Watershed (e.g., Cooper Creek, Russian River, and Kenai River).
Our Analysis
Fish population monitoring is typically based on the presence or absence of
particular species, numbers of particular species, or on community parameters (such as
productivity, density, and diversity) and is usually conducted over multiple years. Fish
habitat monitoring usually focuses on the long-term assessment of habitat variables that
have the greatest influence on aquatic species. According to Kenai Hydro (2018), the
objective of its proposed Biotic Monitoring Plan is to monitor the potential effects of
project construction and operation (including the proposed protection measures) on fish
and fish habitat in Grant Creek.
Kenai Hydro’s proposed erosion and sediment control, spill prevention, control
and containment, hazardous materials, and fuel storage plan are intended to limit adverse
effects on environmental resources. We anticipate these plans would adequately protect
water quality and aquatic habitat in Grant Creek from sedimentation or inadvertent
releases of hazardous petroleum products. We also anticipate that Kenai Hydro’s
proposed instream flows, ramping rates, channel maintenance flows, and water
temperature regime, would adequately mitigate project effects on resident and
anadromous salmonids in Grant Creek. Therefore, we have no reason to conclude that
construction and operation of the project would in and of itself, cause long-term changes
to aquatic resources in Grant Creek or Grant Lake.
Further, while juvenile and adult salmonid monitoring during the initial phases of
project operation would provide data on aquatic habitat and juvenile and adult fish
population in Grant Creek, a limited amount of information is available on the historical
abundance and distribution of both juvenile and adult salmonids in Grant Creek. This
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lack of data inhibits development of a monitoring program that would provide for
comparisons between existing conditions and conditions with the project in place.
The project has no control over external factors that influence anadromous
salmonid abundance including commercial and recreational harvest, ocean survival,
predation, or degraded habitat located outside the project vicinity, that may lead to
significant variability in the abundance of salmonid populations in Grant Creek.
Although some project effects can be approximated by comparing fish monitoring results
for Grant Creek to other concurrent fish population assessments in the Kenai River
Watershed, this analysis is restricted to data gathered on fish populations within a limited
distance from the project to minimize other variables, such as habitat quality and land use
practices, and there is no way to identify mitigation measures that are specific to project
effects.
For all of these reasons, we find no project-related benefit or justification for a
license condition requiring monitoring juvenile and adult salmonids before and after
project construction and operation commences.
Gravel Monitoring and Augmentation
Kenai Hydro proposes to assess the condition of salmonid spawning gravels
within reaches 1 through 4 of Grant Creek to determine a need for gravel augmentation in
year one of construction and again in years 5 and 10 of operation. Gravel monitoring
would include surface sampling to characterize surface substrate size at various bedforms
often utilized for spawning, and subsurface bulk sampling to characterize subsurface
substrate size at anticipated spawning areas. If no significant changes were identified
within the first 10 years of operation, Kenai Hydro would discuss the frequency and need
for additional gravel monitoring with the stakeholders. In the event that the project is
having a negative effect on spawning gravel recruitment and transport in Grant Creek,
Kenai Hydro would discuss the issue with the stakeholders during the next annual
compliance reporting period, and develop an approach for supplementing gravel or using
channel maintenance flows to ensure functional recruitment and transport of spawning
gravels and sediment.
FWS (10(j) recommendations 4 and 20), NMFS (10(j) recommendations 4), and
Alaska DFG (10(j) recommendation 4) do not support gravel augmentation, and instead
recommend channel maintenance flows through the bypassed reach, as discussed in
section 3.3.2.2, Sediment Management subsection.
In lieu of the Kenai Hydro’s proposed measures for gravel augmentation, FWS
recommends Kenai Hydro collect genetic tissue samples for species DNA analyses.
FWS believes that there is an opportunity to obtain live fish DNA samples during the
construction of the project access road. FWS recommends tissue be collected from adult
salmon from Grant Creek in consecutive sample years until 200 coho, 100 sockeye, and
200 salmon samples have been collected. FWS states that Kenia Hydro needs to collet
DNA samples from Grant Creek before the project is constructed to support population
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baselines used to identify appropriate post-project mitigation measures over the life of the
project license. FWS also recommends Kenai Hydro collect tissue samples from about
50 to 100 rainbow trout and Dolly Varden adults for DNA analysis. FWS states that
tissue samples from rainbow trout and Dolly Varden from Grant Creek would improve
the FWS spatial coverage for these species in the Kenai River Watershed and would
improve FWS’s estimates of genetic diversity for both species.
NMFS agrees with Kenai Hydro’s proposed gravel monitoring but recommends
the assessment of the gravels continue on a 5-year interval for the life of the license.
NMFS believes that if spawning gravels were to be depleted, the depletion would not
likely be detected in the first 5 years of project operation and may take 20 to 30 years or
more to manifest.
Alaska DFG believes that Kenai Hydro’s proposed sediment monitoring is
inadequate, and recommends monitoring sediment conditions using Kenai Hydro’s
proposed methods during years 5, 10, and 20 of project operation. Alaska DFG also
recommends Kenai Hydro prepare a final report to address possible modifications to the
project structures and operation for any protection or enhancement purposes.
In response to comments, Kenai Hydro agreed to the agencies’ recommended
channel maintenance flows, and if channel maintenance flows are required as a condition
of the license, it would modify the Biotic Monitoring Plan to eliminate the need for
adaptive management measure to assess sediment transport and will eliminate the
potential need for gravel supplementation.
In regard to DNA sampling, Kenai Hydro states that the methods to monitor adult
salmonids consist of visual, redd, and carcass surveys, none of which include live adult
salmonid capture. As such, Kenai Hydro states that it is unable to commit to the
collection of genetic samples from live fish. Kenai Hydro states that if FWS determines
that samples from carcasses associated with the monitoring presented in the Biotic
Monitoring Plan would assist in FWS’s desire to expand its global genetic database,
Kenai Hydro would be willing to gather samples opportunistically.
Our Analysis
As discussed in section 3.3.2.2, in the Sediment Management subsection, the
proposed channel maintenance flows of 800 cfs, provided on a regular basis should move
sediment from Reaches 5 and 6 to the lower reaches in a manner that is similar to the
existing conditions to retain downstream fish spawning habitat. However, it is unknown
whether the proposed and recommended channel maintenance flows would be successful
at maintaining the current rate of sediment recruitment from Reach 5 and Reach 6. The
primary source of gravel in Grant Creek is erosion in Reaches 5 and 6 occurring during
high flows. Because the project would change the frequency, duration, and intensity of
high flows through these reaches, it is likely erosion potential would be reduced and
Reaches 5 and 6 could become gravel limited. While the 800-cfs flows would likely
transport gravel if it is present it the channel, they would not have the desired effect if no
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gravel is available to transport. Gravel monitoring, using Kenai Hydro’s proposed
methods, would be adequate to evaluate the success of channel maintenance flows at
maintaining erosion processes and providing gravel into Reaches 5 and 6.
Because erosion is a long-term process, any potential effect of the project on
gravel would occur slowly, and any decrease in gravel abundance as a result of the
project may not be observable after the first 5 years of operation. Therefore, monitoring
in year 5 of operation, as recommended by Alaska DFG, is not likely to detect a change.
By year 10, two channel maintenance flows would have occurred, and evidence of any
depletion of spawning gravel in Grant Creek may be identified. Because the time span
between channel maintenance flows would depend on water years, monitoring in years
15 and 20 would provide an accurate assessment of the effects of the project on gravel
abundance in Grant Creek. An analysis of monitoring results conducted after year 20
would identify whether a change in spawning gravel has occurred and if a decline is
observed, actions to improve spawning habitat such as modifications to project operations
or gravel augmentation could be implemented. Monitoring in year 30 and a subsequent
analysis would evaluate whether the channel maintenance flows and any mitigation
measures that were implemented after year 20 were successful at maintaining gravel
recruitment and transport processes in Grant Creek. If no mitigation measures were
implemented in year 20, monitoring in year 30 would be able to confirm that gravel
abundance remained stable under project operations.
As discussed in section 3.3.2.2, in the Aquatic Habitat Enhancement Measures
subsection, FWS’s recommendation to collect tissue samples for genetic analysis would
improve the existing genetic baselines for salmonids in Grant Creek. However, there is
no project-related purpose for requiring a license condition stipulating that Kenai Hydro
collect tissue samples for genetic analysis. We cannot envision a scenario where project
construction and operation, with protection and enhancement measures included in any
license issued for the project, would result in a significant change in genetic structure of
the salmonid populations in Grant Greek. Further, general monitoring of population
genetics would not necessarily isolate any project-specific effects on the resource.
Consequently, we find that any monitoring data would provide no benefits from a
project-related perspective.
Effects of Project Operation on Aquatic Habitat in the Trail Lake Narrows
Operation of the proposed project would alter the seasonal flow pattern in Grant
Creek, which would, in turn, modify the amount of flow through the Trail Lake Narrows.
These altered flow conditions could affect the capacity of the Trail Lake Narrows to
support fisheries resources, including Chinook, coho, sockeye, and pink salmon and
resident rainbow trout and Dolly Varden.
Our Analysis
As discussed above in section 3.3.2.2, in the Effects of Project Operation on
Aquatic Habitat Downstream of the Project Tailrace subsection, operation of the
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proposed project would have the greatest effect on the hydrograph in spring and early
summer when snowmelt would be retained in Grant Lake to fill the reservoir and would
also increase flows through Grant Creek in the winter.
Grant Creek contributes to about 25 percent of the flow through the Trail Lake
Narrows throughout the year under existing conditions with slight seasonal variations
(see table 3-9). The decrease in flow in the Trail Lake Narrows during June through
August comes at a time when the Trail River system experiences highly variable flows
because of snowmelt runoff. The decrease in flows in that would be attributable to
project operations are expected to be within the range of daily average flows that are
observed at the Trail Lake Narrows in a low to average daily flow. The increase in flow
from Grant Creek between January and April—from between 33 and 55 cfs average
monthly discharge under current conditions to 60 cfs as recommended by the agencies—
would result in a minor change in flows from Grant Creek to the Trail Lake Narrows and
would not change existing conditions at the Narrows. Winter habitat is expected to
remain varied, freezing in colder years and remaining flowing in warmer years.
Riffles dominate the Trail Lake Narrows, and redds have been found in suitable
spawning gravels. Because Grant Creek is the closest upstream tributary to the Trail
Lake Narrows, project operation could reduce the distribution and availability of suitable
spawning gravels for resident and anadromous salmonids in the Trail Lake Narrows, as
well as in Grant Creek. As discussed in section 3.3.2.2, in the Sediment Management and
Effects of Operation on Transport of Materials subsection, adequate channel maintenance
flows provided through the bypassed reach would mimic the natural hydrograph and
would reflect the existing processes of spawning substrate recruitment into Grant Creek
and sediment transport from Grant Creek through the Trail Lake Narrows.
As discussed in section 3.3.2.2, in the Effects of Operation on Transport of
Materials subsection, reduced peak flows in Grant Creek below the tailrace in spring has
the potential to retain more large wood in Grant Creek on an annual basis, instead of
flushing wood through Grant Creek and into the Trail Lake Narrows. Channel
maintenance flows of adequate magnitude, duration, and frequency are expected to
maintain natural wood transport processes over a longer period. Also, LWD in the Grant
Creek system is limited; consequently, the amount of contribution of LWD from Grant
Creek to habitat in the Trail Lake Narrows is expected to also be limited. Grant Creek is
1 of 10 tributaries to Upper and Lower Trail Lakes, and a potential decrease in LWD
contribution in 1 of these 10 tributaries is not expected to substantially affect the habitat
complexity in the Trail Lake Narrows.
Based on the above analysis, operation of the proposed project would slightly
modify flows that are not expected to have a significant impact on habitat in the Trail
Lake Narrows. Project operations would also regularly provide channel maintenance
flows with a magnitude, duration, and frequency that is adaptively managed to maintain
transport of sediment and biological materials in a manner that is similar to existing
conditions. Channel maintenance flows are also intended to maintain sediment
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recruitment from the bypassed reach of Grant Creek; however, the success of these flows
is unknown. If the proposed channel maintenance flows are successful at maintaining the
erosional processes that recruit sediment into the Grant Creek system, it is expected fish
spawning and rearing habitat in the Trail Lake Narrows would be maintained similar to
existing conditions.
3.3.2.3 Essential Fish Habitat
As discussed in detail above and in section 3.3.2.2, the proposed project would
result in short-term adverse effects on Chinook, coho, pink, and sockeye salmon EFH,
predominately during construction of the proposed project. However, proposed and
recommended measures, for construction timing, stream buffers, and ESCP, hazardous
material containment/fuel storage plan, spill prevention, control and containment plan,
construction water quality monitoring plan, and blasting plan would protect water quality,
and any short-term adverse effects would be minor.
Over the long term, the recommended measures of minimum flows in the
bypassed reach, minimum flows below the tailrace, ramping rates, channel maintenance
flows, and installation of a tailrace barrier would maintain and protect habitat for
macroinvertebrates in the bypassed reach, maintain sediment, nutrient, macroinvertebrate,
and large wood transport from the bypassed reaches to below the tailrace, maintain
habitat in Grant Creek during summer, and improve habitat for aquatic resources below
the tailrace both by retaining more LWD in the system by reducing peak flows, and by
increasing rearing habitat in the winter by increasing minimum flows. Therefore, the
proposed project would not adversely affect, and may improve, Chinook, coho, pink, or
sockeye salmon EFH in Grant Creek relative to existing conditions.
3.3.2.4 Cumulative Effects
Water Quantity
Given the remote location of Grant Lake and general lack of human activity in
area, no consumptive Grant Lake or Grant Creek water uses have been identified.
Operation of the project is not likely to have a cumulative effect on streamflows and
water levels in Grant Lake and Grant Creek. The project would likely change the timing
of flows through Grant Creek and therefore could have an effect on the water levels in
Lower Trail Lake and Upper Trail Lake, which receive outflow from Grant Creek.
However, because project operation is not expected to change the overall volume of
water flowing through Grant Creek, the overall effects (i.e., water level fluctuations) on
receiving water bodies should be minimal.
Actions within the geographic scope (i.e., Kenai River Basin) that may affect
streamflows and water levels in combination with the project include other hydroelectric
project developments. The Cooper Lake Hydroelectric Project (FERC No. 2170) is
located on Cooper Lake, Cooper Creek, and Kenai Lake immediately southeast of Grant
Lake. The Cooper Lake Project powerhouse releases directly into Kenai Lake, which is
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the source of the Kenai River. Kenai Lake receives flow from Grant Lake via outflows
from Lower Trail Lake. No existing impoundment or diversion structures are located on
Kenai Lake. Operation of the Cooper Lake Project has little to no effect on the flows in
the Kenai River downstream of Kenai Lake. Operation of the Grant Lake Project would
not result in the diversion of water out of the Kenai River Basin; therefore, project
operation would not reduce the amount of water that enters Kenai Lake. Additionally,
operation of the project would not dramatically alter the timing of flow entering Kenai
Lake and would have a limited to no effect on flows in the Kenai River. We conclude
that the project would not cause a cumulative effect on streamflows and water levels in
the Kenai River Basin.
Water Quality
Operation of the project is not expected to have a cumulative effect on water
quality in Grant Lake or Grant Creek. Several mining claims are located on Grant Lake
(see figure 3-26 in section 3.3.4.1). The Forest Service (Seward Ranger District)
approved a mining plan for operating the White Rock Mine on the north side of Grant
Lake, with proposed access via all-terrain vehicle on the Grant Lake Trail. The Forest
Service’s 2015 environmental assessment concludes that operation approved under the
plan of operation would have no direct, indirect, or cumulative effects on fish or the
aquatic environment.
Plans for erosion and sediment control, hazardous materials containment/fuel
storage, and spill prevention will minimize short-term impacts of project construction on
water quality. Once operational, more frequent fluctuations in Grant Lake elevations
may result in increased erosion from shoreline areas, with potential minor increases in
turbidity in Grant Lake, and to a lesser extent in Grant Creek. However, this is unlikely
given the makeup of the Grant Lake shoreline, which is composed of large substrate
unlikely to erode. No changes in temperature are anticipated in Grant Lake, and other
project effects on water quality, including levels of metals, nutrients, cations/anions, and
alkalinity are not anticipated because the substrate composition of the lake shore consists
of coarse, angular boulders, with low susceptibility to erosion and there would be no new
inundation of vegetated areas.
Minor changes in Grant Creek water temperatures may occur, including within the
proposed bypassed reach and downstream of the proposed tailrace. The proposed
variable intake structure and plans to match Grant Creek and Grant Lake temperatures are
expected to minimize temperature effects of the project. Because of the minor effects on
temperature and water quality, the project is not anticipated to have any noticeable
cumulative effects on the water quality of Lower Trail Lake or the Kenai River Basin.
Fisheries
Sculpin and threespine stickleback, the only fish species present in Grant Lake,
would experience reservoir fluctuations that differ from existing conditions because of
project operation. While project operation would not result in Grant Lake water surface
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elevation fluctuations outside the existing lake level range, Grant Lake would experience
greater inter-monthly water surface elevation changes. Because of its steep, rocky
shorelines, project operation would not expose or adversely affect important fish habitat
during project drawdowns. However, fish residing in Grant Lake could be entrained
through the project intake during periods of generation. While some fish entrainment
would occur, entrainment rates at the project intake are expected to be minimal and
would not contribute to cumulative effects in the Kenai River basin.
Under existing conditions, the proposed project’s bypassed reach supports a
population of resident fish and macroinvertebrates. The diversion of water associated
with the proposed project would affect the natural hydrology, geomorphology, and water
quality in the bypassed reach downstream of the dam, which in turn would affect the
quality and quantity of aquatic habitat for resident fish in the bypassed reach and the
section of Reach 5 that is accessible to anadromous fish. These effects would be
localized and would not contribute to cumulative effects in the Kenai River Basin.
It is anticipated that implementation of Kenai Hydro’s proposed minimum
instream flows in the bypassed reach and downstream of the project tailrace, ramping rate
requirements, channel maintenance flows, and construction related measures to protect
water quality would maintain aquatic habitat diversity in the proposed bypassed reach
and downstream of the tailrace for the duration of any license issued for the project.
These measures, coupled with the implementation of our recommended water
temperature management would provide minimize project effects aquatic habitat in the
project area. Therefore, operation of the project would likely mitigate these cumulative
effects on fishery resources in Grant Creek.
3.3.3 Terrestrial Resources
3.3.3.1 Affected Environment
Vegetation
In support of the 2013/2014 Terrestrial Resources Study, Kenai Hydro developed
an upland vegetation map of the project area using aerial imagery and ground-truthing
(ERM and Beck, 2014). The study area for the general vegetation mapping survey
included all lands within the FERC project boundary and the outer extent of the
assessment areas for the wildlife, wetland, sensitive plant, and invasive plant surveys.
Around Grant Lake, the general vegetation mapping survey area included all areas up to
an elevation of 733 feet. Upland vegetation around Grant Lake comprises large stands of
coniferous forest and coniferous-deciduous forest on moderate slopes at the southeastern
end, the elbow, and the southwestern shore of the project area. Floodplain forest and
scrub communities occur mostly in the eastern portion of the project area and are
associated with Inlet Creek and along outwash fans and floodplains associated with small
drainage areas along the Grant Lake shoreline. A mosaic of smaller areas of alder scrub
and grass-forb meadow vegetation types are found on steep, avalanche-prone slopes
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around Grant Lake. Much of the forest in the study area is old growth. Although upland
vegetation in most of the study area is currently largely unaffected by human activities,
evidence of past logging of some larger trees was observed during the survey near the
ARRC and Seward Highway. Table 3-24 shows the vegetation communities/habitat
types and their approximate area estimated during the 2013/2014 field surveys.
Table 3-24. Vegetation communities/habitats within the project study area (Source: ERM
and Beck, 2014, as modified by staff).
Vegetation Type Acres Dominant Species
Coniferous forest 173.7 Lutz spruce,a mountain hemlock, rusty menziesia, early
blueberry, twinflower
Coniferous-
deciduous forest
177.1 Lutz spruce, paper birch, poplar, quaking aspen, rusty
menziesia
Alder scrub 34.5 Sitka alder, goatsbeard, willow species, devil’s club
Grass-forb
meadow
2.2 Bluejoint wheatgrass, goatsbeard, red raspberry,
highbush cranberry
Floodplain forest
and scrub
106.0 Lutz spruce, poplar, paper birch, Sitka alder, willow,
sedge species, river beauty, bluejoint reedgrass
Wetlands 77.1b Herbaceous wetlands, scrub-shrub wetlands,
riparian/forested wetlands, non-vegetated open water
Total 570.6
a Lutz spruce (Picea x lutzii) is a hybrid of Sitka spruce (Picea sitchensis) and white
spruce (Picea glauca).
b Wetland acreages presented in table 3-24 differ from those in table 3-25 because
the value in table 3-24 is for the entire Terrestrial Resources Study area, whereas
acreages for table 3-25 are for the wetland assessment area only.
Wetlands
Kenai Hydro assessed wetlands and waters using a combination of desktop studies
and mapping during the broader terrestrial resources surveys in 2013 (ERM and Beck,
2014). The wetlands assessment area included Grant Lake to about the 705-foot
elevation contour along the shoreline, the area within a 100-foot buffer around Grant
Creek, and the area within 100 feet of all proposed project infrastructure features.
Wetlands were mapped using global positioning system points in the field with
subsequent editing in geographic information system software using aerial photography.
In December 2014, the wetland assessment area was updated to reflect the addition of the
surge chamber, access road, and switchbacks along the intake access road.
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Vegetated wetlands included herbaceous, scrub-shrub, forested wetlands
associated with depressional, lacustrine, slope, and riparian areas. Depressional wetlands
within the wetland assessment area include those wetlands occurring within discrete
topographic depressions primarily located on the south side of Grant Creek in the vicinity
of the access road and transmission corridor. Lacustrine wetlands included persistent and
non-persistent emergent wetlands, aquatic beds, and vegetated shoreline communities
that are directly attached to or border Grant Lake. Slope wetlands include a west-facing
forested slope adjacent to the detention pond and a small seasonal drainage on a north-
facing slope south of Grant Creek. No vegetated lacustrine fringe or slope wetlands were
associated with Upper Trail and Lower Trail Lakes. Riverine wetlands were adjacent to
and hydrologically influenced by Inlet Creek, Grant Creek, their tributaries, and
drainages associated with Grant Lake. The upper reaches of Grant Creek, which are
steep and bedrock-lined, transition from unvegetated bed and bank to limited
nonvegetated floodplain and scrub vegetation in the lower reaches and Trail Lake
Narrows confluence. Table 3-25 shows the total area of wetlands and waters within the
wetland assessment area for the project.
Table 3-25. Wetlands and other waters within the proposed project lands (Source:
ERM and Beck, 2014).
Feature Type Acres Description
Wetlands
Herbaceous wetlands 5.68 Palustrine emergent and deciduous scrub-
shrub mixed wetlands
Herbaceous wetland/
floodplain forest and scrub
3.11 Palustrine emergent and deciduous scrub-
shrub mixed wetlands
Scrub-shrub wetlands 20.92 Palustrine deciduous and broadleaved
evergreen scrub-shrub wetlands and
emergent mixed wetlands
Scrub-shrub wetland/
floodplain forest and scrub
7.94 Palustrine deciduous scrub-shrub,
emergent mixed, and deciduous forested
mixed wetlands
Forested wetlands 0.89 Palustrine needle leaved evergreen
forested wetland
Total wetlands 38.54
Other Waters
Open water 1,650.14 Grant Lake, Trail Lake Narrows, ponds
Riverine 9.81 Grant Creek, Inlet Creek, outwash fans,
and streams
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Feature Type Acres Description
Total other watersa 1,660
Total 1,698.5
a Small streams that were too narrow to map as polygons (e.g., less than 15 feet wide)
were mapped as lines and reported in linear feet. Twenty-three of the small stream
segments were perennial (8,303 feet), and 36 stream segments (5,279 feet) were
intermittent with no water flowing in the channel.
Non-native, Invasive Species
Overall, Kenai Hydro observed few populations of invasive plants 55 in the
invasive plant study area during the 2013/2014 Terrestrial Resources Study surveys. The
study area for the invasive plant survey included NFS, private, and state lands in the
project area, 5 feet above Grant Lake normal maximum elevation of 703 feet; a 50-foot
buffer along the route for the proposed road and transmission line; and a 100-foot buffer
around all other proposed project features along Grant Creek and the Seward Highway.
Populations of annual bluegrass, Kentucky bluegrass, common dandelion, and white
clover were documented. Each of these species were previously mapped in the vicinity
of the invasive plant study area on State of Alaska lands (Forest Service, 2013b) and
documented in the Alaska Exotic Plants Information Clearinghouse database (Alaska
Center for Conservation Science, 2018). Invasive aquatic species known to occur on the
Kenai Peninsula include waterweed and white water lily (Alaska Exotic Plants
Information Clearinghouse, 2019).
During the 2013 study, common dandelion and white clover were located along
the Seward Highway ROW within the study area. In addition, a small population of
timothy grass was observed along Seward Highway in 2014. Common dandelion was
located along the ARRC ROW, and annual bluegrass, Kentucky bluegrass, and common
dandelion were located on the Grant Lake Trail where it enters the invasive plant study
area on the northwestern shore of Grant Lake on Forest Service lands. Small- to
medium-sized populations of common dandelion were scattered around Grant Lake in
disturbed or bare/exposed soil areas on State of Alaska and Forest Service lands.
Invasive plants were otherwise not observed in areas that do not experience appreciable
human disturbance.
55 The National Invasive Species Council (2016) defines invasive species as non-
native to the ecosystem under consideration and whose introduction causes or is likely to
cause economic or environmental harm.
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Special-status Plants
Special-status plants include species listed as threatened or endangered at the state
level and species designated by the Forest Service as sensitive. Through review of Kenai
Hydro’s Biological Evaluation for Plants,56 relevant literature and consultation, maps,
and field surveys in July 2013, Kenai Hydro identified two special-status plants with the
potential to occur on proposed project lands: pale poppy (Papaver alboroseum) and
Aleutian shield fern (Polystichum aleuticum). The study area for the sensitive plant
survey was limited to NFS lands within the study area and included 5 feet above Grant
Lake normal maximum elevation of 703 feet, a 50-foot buffer along the route for the
proposed road and transmission line, and a 100-foot buffer around all other proposed
project features.
The pale poppy requires open, well-drained habitat and occasional disturbance to
create or maintain this habitat. During the 2013 sensitive plant surveys, Kenai Hydro
observed a small population of pale poppy on NFS lands located in a floodplain forest
and scrub community near the north shore of Grant Lake. The population consisted of 20
individual plants growing on a semi-stabilized, sparsely vegetated, south-facing creek
outwash area consisting of cobble, sand, and gravel. The nearest plants were 8 feet from
the shoreline, 1 to 3 feet higher than the current maximum lake elevation of 703 feet. No
other sensitive species or habitats, including that of the Aleutian shield fern, were
documented during the survey.
Wildlife
Proposed project lands are within a region containing vast amounts of undisturbed
habitat supporting a variety of terrestrial wildlife species. Kenai Hydro conducted wildlife
field surveys of the project area in 2010 and 2013/2014 as part of its Terrestrial Resources
Study (ERM and Beck, 2014). The results of previous wildlife studies conducted in the
1980s provided baseline data for Kenai Hydro’s more recent inventories. Kenai Hydro’s
inventories, along with data from previous studies, report an abundance of bird species in the
project area including seven raptor species, eight waterfowl species, and more than 100
species of resident and migratory landbirds and shorebirds that potentially occur and breed in
the project area. Results from Kenai Hydro’s 2013/2014 surveys suggest that Grant Lake and
Trail Lake Narrows provide overwintering habitat for trumpeter swans and other waterbirds.
Also documented, or potentially present, are several terrestrial mammal species, including
brown bear, black bear, moose, mountain goat, Dall sheep, gray wolf, river otter, and
wolverine. In comments on the final license application, the Forest Service noted that caribou
may also occur in the project vicinity. Several of the avian and mammalian species, which
are known to occur or may occur within the project, are Forest Service sensitive species,
species of special interest, or species of conservation concern (table 3-26).
56 Kenai Hydro filed its final biological evaluation for plants as attachment E-4 in
exhibit E of the amended final license application.
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Table 3-26. Forest Service sensitive species, species of special interest, and species of conservation concern potentially
occurring on proposed project lands (Source: Kenai Hydro, 2018a).
Species
(Scientific Name) Status Habitat Requirements Potential to Occur on Proposed
Project Lands
Raptors
Bald eagle
(Haliaeetus
leucocephalus)
Forest Service species
of special interest
Nesting habitat includes
deciduous forest, coniferous
forest, and mixed deciduous-
coniferous forest. Foraging
habitat includes riparian and
open-water habitats.
Kenai Hydro observed individuals
during 2010 field surveys, and
documented a breeding pair on Grant
Creek in 2013. The species was
previously documented on proposed
project lands in 1984. About 80
percent of all detected bald eagle nests
on the Seward Ranger District are
located in mature cottonwood trees
with an average diameter of 31 inches
and within 0.25 mile of an
anadromous fish-bearing stream.
Bald eagle is considered to be a
common species in the area.
Northern goshawk
(Accipiter gentilis)
Forest Service species
of special interest
Nesting and foraging habitat
includes deciduous forest,
coniferous forest, and mixed
deciduous-coniferous forest.
Kenai Hydro documented one
individual female goshawk during
2013 field surveys. The individual
was documented in coniferous
hardwood forest habitat and was not
observed to be nesting. The northern
goshawk is a year-round resident of
the Chugach National Forest. The
majority of nests discovered on the
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Species
(Scientific Name) Status Habitat Requirements Potential to Occur on Proposed
Project Lands
Seward Ranger District have been
documented in old-growth hemlock-
spruce stands characterized by a
closed canopy, large average
diameter, gap regeneration, and an
open understory. A small stand of
old-growth hemlock and spruce at the
east end of Grant Lake may provide
additional nesting habitat. However,
nesting habitat on the Kenai Peninsula
has been degraded by the invasive
spruce bark beetle.
Osprey
(Pandion haliaetus)
Forest Service species
of special interest
Nesting habitat includes
deciduous forest, coniferous
forest, and mixed deciduous-
coniferous forest. Foraging
habitat includes riparian and
open-water habitats.
Although Kenai Hydro documented
this species during 2013 field surveys,
it is considered to be rare on the
proposed project lands.
Breeding Landbirds and Shorebirds
Marbled murrelet
(Brachyramphus
marmoratus)
Forest Service species
of special interest
Nesting habitat consists of old-
growth conifer forest on
islands and along coasts and
inland freshwater lakes.
This species has not been documented
in the Grant Lake area. Potential
suitable nesting habitat is present in
mature hemlock and spruce-hemlock
forests and suitable foraging habitat is
present on Grant Lake within the
proposed project boundary.
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Species
(Scientific Name) Status Habitat Requirements Potential to Occur on Proposed
Project Lands
Townsend’s warbler
(Setophaga
townsendi)
Forest Service species
of special interest
Nesting and foraging habitat
includes tall shrub thickets,
coniferous forest, and mixed
deciduous-coniferous forest.
Kenai Hydro documented the
presence of this species during 2010
and 2013 field surveys. The species
was previously documented on the
proposed project lands in 1984. This
species is abundant throughout
forested locations on the Kenai
Peninsula and Seward Ranger District
and is found in higher numbers in
older spruce and hemlock forests.
Waterbirds
Dusky Canada goose
(Branta canadensis
occidentalis)
Forest Service species
of conservation
concern for Chugach
National Forest
Nesting and foraging habitat
includes lacustrine waters and
shorelines, wet meadow, and
dwarf shrub meadow.
Kenai Hydro documented Canada
goose (Branta canadensis) during
2013 field surveys. However, it is
unclear whether documented
individuals were members of the
occidentalis subspecies. Suitable
habitat is present for Canada goose on
proposed project lands. The dusky
Canada goose is not likely to be
present on proposed project lands
because its nesting range is limited to
the Copper River Delta near Cordova
within the Chugach National Forest,
well east of the project area. This
subspecies’ winter range consists
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Species
(Scientific Name) Status Habitat Requirements Potential to Occur on Proposed
Project Lands
primarily of Oregon's Willamette
Valley and along the Columbia River,
but a few individuals stay farther
north in coastal areas of Washington
and British Columbia. Therefore, it is
not likely that dusky Canada geese
would traverse the project area during
migration.
Trumpeter swan
(Cygnus buccinator)
Forest Service
sensitive species
Nesting and foraging habitat
includes lacustrine waters and
shorelines, wet meadow, and
dwarf shrub meadow. Massive
nest mounds in areas of reeds,
sedges, or similar emergent
vegetation, primarily on
stationary fresh waterbodies.
Kenai Hydro documented this species
on the east side of Lower Trail Lake
during 2013 field surveys. Trumpeter
swans are believed to overwinter in
this area because the location remains
ice-free because of the high pressure
of water flowing through Trail Lake
Narrows. However, this species is
considered to be uncommon in the
area.
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Species
(Scientific Name) Status Habitat Requirements Potential to Occur on Proposed
Project Lands
Terrestrial Mammals
Brown bear
(Ursus arctos)
Forest Service
management indicator
species
Spring and summer habitat
includes south-facing hillsides,
avalanche chutes, and salmon
streams.
Kenai Hydro did not observe brown
bears during the 2010 or 2013/2014
field surveys, although suitable spring
and summer habitat is present.
Modeling results indicated that
potential denning habitat is abundant
and well distributed on steep slopes
on the proposed project lands.
Canada lynx
(Lynx Canadensis)
Forest Service species
of special interest
This species uses a variety of
habitats, including spruce and
hardwood forest, and both
subalpine and successional
communities. The best habitats
are those with an abundance of
early successional growth,
which provide the best habitat
for snowshoe hares and other
prey species.
Kenai Hydro did not observe this
species during any of the field
surveys. An incidental sighting of a
lynx in the project area was reported
in 2013, but the coordinates of the
sighting were not provided.
Little brown bat
(Myotis lucifugus)
Forest Service
management indicator
species
This species favors old-growth
forests and riparian habitats but
will roost in buildings and
trees, under rocks and wood,
and in caves.
Kenai Hydro conducted a bat survey
in 2010 in an abandoned cabin on the
west side of Grant Lake. No bats
were documented during the survey.
Similarly, this species was not
documented during the 2013/2014
field surveys. Currently, insufficient
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Species
(Scientific Name) Status Habitat Requirements Potential to Occur on Proposed
Project Lands
information exists for this species in
Alaska to assess the presence of
suitable habitat on the proposed
project lands.
Moose
(Alces alces)
Forest Service
management indicator
species
This species is primarily
associated with early to mid-
succession habitat and riparian
areas and depends on early
seral vegetation types
including young hardwoods
(willow, birch, aspen, and, to a
smaller extent, cottonwoods).
Kenai Hydro observed moose in on
proposed project lands during the
2010 field surveys. However, no
moose or moose tracks were observed
during the 2013/2014 winter moose
surveys. Overall moose habitat on the
Seward Ranger District is considered
to be of low quality and capable of
supporting only 2 to 5 moose per
square mile.
Mountain goat
(Oreamnos
americanus)
Forest Service
management indicator
species
Preferred habitat includes
alpine slopes supporting
mountain hemlock, a major
component of their diet.
Kenai Hydro documented six
individuals during the 2010 field
surveys. The principal area of goat
use in the Grant Lake Basin is the
north side of the lake. These south-
facing slopes are used in fall, winter,
spring, and into early summer.
River otter
(Lontra canadensis)
Forest Service species
of special interest
This species occurs in
freshwater riparian habitats.
Kenai Hydro did not observe this
species during any of its field surveys.
However, suitable habitat occurs
along Grant Creek and Grant Lake.
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Species
(Scientific Name) Status Habitat Requirements Potential to Occur on Proposed
Project Lands
Wolverine
(Gulo gulo)
Forest Service species
of special interest
This wide-ranging predator can
be found in various habitats,
most commonly in mountain
areas. Studies in southcentral
Alaska found that wolverines
prefer higher elevations during
the summer and lower
elevations during the winter.
This species’ range and
distribution is driven primarily
by prey abundance.
Kenai Hydro did not observe this
species during any of its field surveys.
Forest Service reported the presence
of wolverine dens approximately 2
miles southeast of Grant Lake in 2008
and 2010. However, these den
locations are well outside the area
where project-related activities would
occur.
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3.3.3.2 Environmental Effects
Effects of Project Construction on Vegetation Communities
During project construction, Kenai Hydro would clear vegetation and conduct
other ground-disturbing activities on proposed project lands, resulting in permanent and
temporary disturbances that could alter vegetation community structure through
vegetation removal, soil compaction and erosion, or introduction of invasive plants.
Disturbance of vegetation communities also has implications for wildlife species
associated with these habitats. Effects of project operation could include maintaining
vegetation in the project area, including recreational access areas and trails, and
maintaining the transmission line corridor.
Kenai Hydro estimates that construction activities would result in a permanent loss
of 8.42 acres of vegetation, including forested cover types. Construction access, corridor
clearing, and the establishment of temporary staging and work areas would result in an
additional 1.46 acres of temporary disturbance.
To minimize effects associated with project construction and operation on
vegetation communities, Kenai Hydro proposes a Vegetation Management Plan,
consistent with Forest Service final 4(e) condition 19. The proposed plan would cover all
lands within, and adjacent to, the FERC project boundary and describes measures
proposed (i.e., BMPs) to minimize effects on vegetation communities, including:
• Minimization of the introduction and spread of invasive plant species
during construction;
• Invasive plant management and control during the first growing season
after construction completion and year 5 post-construction;
• Revegetation of the project area during the next growing season after
construction completion;
• Vegetation maintenance prior to construction, including removal of
vegetation in construction areas, and every 8 to 10 years during the license
term;
• Sensitive plant species protection and monitoring to be conducted prior to
ground-disturbing activities on NFS lands associated with project
construction; and
• Management of the pale poppy population within the project boundary.
Kenai Hydro also proposes to develop an ESCP that would include BMPs to
minimize erosion potential and sediment deposition related to construction and
maintenance to protect any sensitive plants and reduce the potential introduction of
invasive plants. Section 3.3.1.2, Geologic and Soil Resources, Environmental Effects,
presents a more detailed discussion of the ESCP.
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Alaska DFG 10(j) recommendation 10 and FWS 10(j) recommendation 11
recommend that Kenai Hydro provide protective buffers around water resources to
reduce construction effects on wildlife habitat and movement corridors by locating
proposed clearings, road corridors, and the proposed transmission line corridor a
minimum of 100 feet, measured horizontally, away from ordinary high water of Grant
Creek. However, the recommendations note that clearings for the powerhouse and
appurtenant facilities, and tailrace, are excluded from this requirement; appurtenant
facilities include, but are not limited to, the bridge across Trail Lake Narrows, the weir at
the outlet of Grant Lake, the intake in Grant Lake, and monitoring equipment in both
Grant Lake and Grant Creek. Additionally, the agencies exclude the approximately 500
feet of access road east of Trail Lake Narrows, where private property necessitates
construction of the road and transmission line corridor within 100 feet of Grant Creek.
Forest Service final 4(e) condition 19 specifies that Kenai Hydro prepare a project
construction plan; however, the Forest Service provides no specific details about the
objectives of this plan or what measures should be included.
Our Analysis
Construction of the proposed intake structure, access road, and adjacent project
components would require permanent disturbance of about 3.44 acres (0.62 acre of
coniferous-deciduous and 2.82 acres of coniferous forest cover types). Construction of
the proposed powerhouse, work area, penstock, detention pond, tailrace, and the buffers
surrounding these structures would require the permanent disturbance of about 0.92 acre
of coniferous-deciduous cover type. Construction of the proposed powerhouse access
road and transmission line corridor would require permanent disturbance of 4.06 acres
(3.53 acres of coniferous-deciduous forest and 0.53 acre of floodplain forest and scrub
cover types) between the Seward Highway and the proposed powerhouse. Clearing of
upland vegetation in the transmission line corridor during project construction and
operation would result in the permanent conversion of some forested habitats to
herbaceous or shrub habitats. A loss or reduction of the wildlife habitat function for
1.9 acres of wetlands would occur through filling and vegetation clearing within the
project corridor between Grant Lake and Trail Lake Narrows.
These disturbances would alter vegetation community structure and associated
wildlife habitat on project land. Although some permanent removal of vegetation for
construction of project facilities would be unavoidable, Kenai Hydro’s proposal to
minimize ground disturbances and removal of vegetation where possible, and adherence
to working within the limits of the recommended buffers, would minimize construction-
related effects.
Although Alaska DFG and FWS’s 10(j) recommendations 10 and 11 recommend a
minimum 100-foot protective buffer around Grant Creek for siting of ground
disturbances, clearings for the proposed powerhouse, appurtenant facilities, and tailrace
are not included in this requirement. Also not included in their recommendations is about
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500 feet of access road east of Trail Lake Narrows, where private property necessitates
construction of the road and transmission line corridor within 100 feet of Grant Creek.
The exhibit G drawings filed with Kenai Hydro’s amended final license
application show the proposed location of project facilities in relationship to Grant Creek
is consistent with Alaska DFG and FWS’s 10(j) recommendations 10 and 11. Providing
a protective 100-foot buffer around Grant Creek for proposed clearings, roads, and
transmission line corridors would reduce construction-related effects on terrestrial
resources associated with riparian or shoreline habitats. Along the access road east of
Trail Lake Narrows, where construction activities would need to occur within 100 feet of
Grant Creek, Kenai Hydro would implement measures defined in the ESCP to minimize
effects on water quality. The plan would include provisions for bank stabilization and
ongoing monitoring along this section of the road and transmission line corridor, as
discussed in section 3.3.1.2, Geologic and Soil Resources, Environmental Effect.
Clearing of vegetation in the proposed 1.1-mile-long, 100-foot-wide transmission
line corridor during project construction would result in the permanent conversion of
about 4.06 acres of forested habitats to herbaceous or shrub habitats. These disturbances
would alter vegetation community structure and associated wildlife habitat. In addition,
about 1.46 acres of herbaceous communities would be temporarily disturbed during
construction from clearing of the proposed transmission line corridor, and the
establishment of proposed temporary staging and work areas. These plant communities
are expected to recover over time with proper restoration and monitoring as proposed in
the Vegetation Management Plan.
Table 3-27 summarizes total anticipated permanent and temporary disturbance to
vegetation community/habitat types along the existing INHT route and proposed INHT
re-route. Trail construction would likely require using heavy machinery to clear trees and
grade the trail. These activities would result in vegetation disturbance outside the
permanently maintained trail footprint. However, because vegetation would naturally
regenerate in these areas, these effects would be temporary. We assume all temporary
effects of construction would occur within a 100-foot-wide corridor. Permanent effects
would be associated only with trail use and maintenance and would be calculated using a
10-foot corridor. Although Kenai Hydro only proposes to construct the southern portion
of the re-routed INHT from Grant Creek to Vagt Lake, we anticipate that any license
issued for the project that includes the trail re-route would require Kenai Hydro to
construct and maintain the entire re-routed trail. Therefore, we analyze effects of the re-
route as a whole and not just the southern portion. Because Kenai Hydro’s vegetation
study did not include the northern section of the INHT, we conducted this analysis using
recent aerial imagery (Google Earth imagery dated April 16, 2011) to extrapolate
vegetation communities identified in Kenai Hydro’s vegetation study to the remainder of
the INHT.
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Table 3-27. Permanent and temporary effects on vegetation along the existing and
proposed INHT route (Source: Kenai Hydro, 2018a, as modified by staff).
Vegetation Community/
Cover Type
Permanent
Disturbance
(acres)a
Temporary
Disturbance
(acres)b
Total
Disturbance
(acres)
Existing INHT Route (0.8 mile)
Coniferous-Deciduous Forest 9.05 0.89 9.94
Riverine Wetland 0.12 0.01 0.13
Freshwater Forested/Shrub Wetland -- -- --
Total 9.17 0.9 10.07
Proposed INHT Re-Route (1.6 miles)
Coniferous-Deciduous Forest 19.38 1.95 21.33
Riverine Wetland 0.13 0.01 0.14
Freshwater Forested/Shrub Wetland 0.36 0.04 0.4
Total 19.87 2.0 21.87
a Based on a 100-foot corridor.
b Based on a 10-foot corridor.
Kenai Hydro’s proposed INHT re-route would be twice the length of the existing
route and would double the amount of acreage of similar coniferous-deciduous forested
vegetation that would need to be cleared. No additional acreage of riverine wetlands
would be disturbed; however, an additional 0.36 acre of existing forested/shrub wetlands
encountered along the south section of the re-route would be permanently disturbed.
Kenai Hydro’s adherence to BMPs defined in its proposed ESCP (see section
3.3.1.2, Construction Effects on Geology and Soils subsection) would minimize the
effects of erosion and sediment deposition from ground-disturbing activities on
vegetation communities.
As outlined in Kenai Hydro’s Vegetation Management Plan, once project facilities
and structures have been constructed, areas temporarily disturbed by construction would
be revegetated within the next growing season based on existing vegetation conditions.
The plan includes specifications for removal of vegetation prior to construction, post-
construction restoration with monitoring and maintenance of revegetated areas to ensure
successful revegetation, and performing vegetation maintenance every 8 to 10 years
during the license term. Performing vegetation maintenance outside the avian breeding
season, as proposed in Kenai Hydro’s Avian Protection Plan, would help to reduce
potential effects on breeding birds and other wildlife species in the project area. Kenai
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Hydro would also employ measures to protect any existing populations of sensitive plant
species documented during licensing studies.
Kenai Hydro’s Vegetation Management Plan would ensure temporarily disturbed
areas are revegetated and maintained based on existing conditions found on proposed
project lands, invasive species are controlled, and sensitive plant species are protected,
including existing pale poppy populations. In its comments in response to the Ready for
Environmental Analysis notice filed with its preliminary 4(e) conditions, the Forest
Service indicates the Vegetation Management Plan is adequate and provides sufficient
detail about what the plan would entail.
Although the Vegetation Management Plan states Kenai Hydro would comply
with the state and/or federal land manager’s methods for assessing the success of
revegetation efforts, the plan provides no details regarding success criteria or monitoring
schedule. Revegetated sites would be most susceptible to failure during the initial
growing season as seeds germinate and mature and root systems become established.
Monitoring during this period can be especially beneficial in identifying poor
establishment success and identifying the need for additional measures. Identification of
specific success criteria is a critical component of a revegetation plan. Success criteria
based on pre-disturbance vegetation structure would provide the greatest potential for re-
establishing similar wildlife habitat following disturbance. Including survey methods,
survey schedules, and specific guidelines for supplemental plantings would provide the
details needed to evaluate whether the plan would effectively guide restoration efforts.
Because of annual variability in environmental conditions (e.g., weather), initial success
of plantings may not be indicative of further success through subsequent growing
seasons. Ensuring revegetated areas meet success criteria for two consecutive growing
seasons would provide more certainty that restored communities successfully establish
and persist.
The Vegetation Management Plan would provide a guide for restoration success if
Kenai Hydro were to modify its proposed plan to also include provisions to: (1) monitor
the success of revegetation efforts monthly between April and September during
construction and annually thereafter for 5 years; (2) develop restoration success criteria,
based on existing conditions, to determine whether revegetation efforts are successful;
(3) develop data collection and analysis methods for monitoring that corresponds with
success criteria; (4) monitor restoration success and supplemental plantings, as needed,
until success criteria are met for two consecutive growing seasons; (5) conduct pre-
construction surveys for Forest Service sensitive plant species within areas of proposed
ground and vegetation disturbance and consult with the Forest Service if needed to
minimize effects on newly identified populations; and (6) obtain written approval from
the Forest Service prior to using herbicides or pesticides on NFS lands.
Typically, project construction plans include descriptions of construction methods,
a construction schedule, and drawings depicting the design and site-specific locations for
measures to protect natural resources. Kenai Hydro proposes to implement a variety of
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plans, including an ESCP, Vegetation Management Plan, and Avian Protection Plan, to
identify sensitive areas and protect terrestrial resources. While each of these plans
include agency consultation during preparation, it is unclear how Kenai Hydro would
identify potential conflicts between the plans without implementing a construction
plan. For example, the ESCP could include placement of a silt fence in an area identified
as occupied nesting habitat through implementation of the Avian Protection Plan.
Developing a construction plan, as Forest Service specifies, and as discussed in section
3.3.1.2, Geologic and Soil Resources, Environmental Effects, would consolidate site-
specific location and design information for proposed resource protection measures into a
set of maps and drawings that would facilitate agency consultation and communication
with contractors.
Effects of Project Operation on the Potential Spread of Invasive Plant Species
To minimize the potential introduction and spread of invasive species during
project construction and operation, Kenai Hydro would implement measures defined in
the proposed ESCP and the Vegetation Management Plan. As part of its Vegetation
Management Plan, Kenai Hydro would begin construction activity in uninfested areas
before working in infested areas, use weed-free construction materials, clean construction
vehicles and equipment prior to use, limit the amount and length of time that bare ground
is exposed, and minimize ground disturbance and erosion during construction. Kenai
Hydro also proposes to conduct surveys for and to treat invasive plant infestations during
the first growing season after construction completion and year 5 post-construction.
Kenai Hydro would survey areas in the vicinity of project-related disturbance, including
construction areas, access roads, corridors, facilities, and the Grant Lake shoreline, during
the growing season (June to August). Subsequent surveys for invasive plant species
would be conducted every 10 years for the term of the license. The period between
invasive plant surveys may be adjusted depending on the rate at which invasive plants
become established and spread in the project area. Invasive plant infestations associated
with project construction and operation would be monitored and treated in consultation
with Alaska DNR, the Forest Service, and their respective invasive plant management
plans.
Forest Service final 4(e) condition 19 specifies Kenai Hydro develop an aquatic
invasive species management plan that includes: (1) actions taken to reduce the potential
for introduction of aquatic invasive species, such as, locating equipment inspections
and/or wash stations well outside of riparian/aquatic zones; requiring all
equipment/material potentially entering riparian/aquatic zones be either inspected or
washed prior to entering stream, lake or riparian zones; and (2) treatments should aquatic
invasive species be detected.
Our Analysis
Construction and operation of the proposed project has the potential to introduce
and spread invasive plant species. Invasive plants threaten ecosystems by displacing and
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degrading native plant communities, outcompeting rare plants, and reducing wildlife
habitat values. Removal of vegetation and ground disturbance during construction could
create opportunities for invasive plant species to establish and spread. In addition,
proposed operation and maintenance (O&M) activities, including the inadvertent
transport of invasive plant species by maintenance equipment and workers, and
recreational visitors to the project area could cause invasive plant species to spread on the
proposed project lands.
As discussed above in section 3.3.3.1, Terrestrial Resources, Affected
Environment, very few observations of invasive plant populations have been reported in
the vicinity of the proposed project. Known invasive species occurring in the vicinity of
the project (along the Seward Highway and ARRC ROWs and along the Grant Lake
Trail) are mostly associated with upland vegetation communities, with the exception of
the small population of common dandelion along the Grant Lake shoreline. These are
areas where the substrate has been disturbed or where bare soil has been exposed.
However, there is potential for construction vehicles, equipment, and tools to transport
invasive species from other work sites to the project area. Kenai Hydro’s proposed
measures to wash vehicles and equipment before entering the project area would
minimize the potential for introduction of invasive species. Following construction,
Kenai Hydro’s proposed surveys and treatment of any invasive species identified would
minimize the potential for invasive plants to have adverse effects on terrestrial or aquatic
resources. Spread of these invasive species would be minimal with the implementation
of Kenai Hydro’s Vegetation Management Plan.
As described in the Final Vegetation Management Plan, Kenai Hydro proposes
measures for invasive plant management and control during construction and ground-
disturbing activities during the first growing season after completion of construction and
year 5 post-construction. These proposed measures, such as washing construction
vehicles and equipment prior to instream work would apply to aquatic invasive species as
well as terrestrial species. However, modifying the plan, as Forest Service specifies in
final 4(e) condition 19 to include (1) locating equipment inspections and/or wash stations
well outside of riparian/aquatic zones; and (2) applying treatments if aquatic invasive
species are detected, would ensure any weed propagules washed off of equipment do not
enter Grant Creek and that any invasive aquatic plant populations are appropriately
treated. Subsequent surveys of project lands during the growing season for invasive plant
species would be conducted every 10 years for the term of the license. Such action
would be appropriate in this instance, given that project-related activities such as ground
and facility maintenance or recreational use resulting in ground disturbance could cause
the spread of invasive species onto project lands and adjacent lands and waters.
During operation the proposed seasonal 13-foot drawdown would expose bare soil
around the perimeter of Grant Lake during the winter/spring season. The vegetation of
reservoir drawdown zones often differs substantially from that of areas that are not
periodically inundated. Typically, there are more opportunistic species, namely non-
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native invasive plants, which quickly colonize the drawdown zones. These invasive
plants often dominate these disturbed zones and could spread to adjacent upland areas.
Because the substrate in the lake fluctuation zone is steep and contains little fine
sands or gravels suitable for plant establishment, colonization of invasive species in this
area would be minimal. Under the proposed project operation, the areas exposed during
lake drawdowns during the winter/spring seasons would be inundated in late summer
during the flowering period for invasive species known to occur in the vicinity of the
proposed project, so seed production would be limited.
Operation of the project is not expected to negatively affect bypassed reach
vegetation. Kenai Hydro’s proposed bypassed weir and pump system would provide
minimum instream flows to the bypassed reach that would reduce water level fluctuations
and minimize streambank erosion. Although the proposed flows in the upper bypassed
reach could expose minor amounts of channel bed and bank, it would not result in
appreciable opportunities for invasive plant introduction because these areas are steep
and bedrock-lined with limited substrate for plants to germinate. Further, invasive plant
species known to occur in the project area are all upland species and therefore would not
likely colonize these rocky riparian areas. We anticipate proposed project flows would
have minimal effects on existing vegetation along the bypassed reach. Therefore, efforts
to monitor invasive plant infestations in the bypassed reach would not be a necessary
component of the Vegetation Management Plan.
Kenai Hydro’s Vegetation Management Plan includes all lands within the FERC
project boundary that would either be affected, or have the potential to be affected, by
project operations. This could include occurrences of project-related erosion or invasive
plant infestations. Invasive plants often dominate reservoir drawdown zones and can
establish and spread to adjacent upland areas and potentially downstream locations.
However, surveys for and treatment of invasive plant infestations and site restoration
would be conducted on lands affected by the project during the first growing season after
construction completion and year 5 post-construction to monitor project restoration.
Additionally, Kenai Hydro’s proposed facilities would be cited at least 100 feet from
stream crossings (where practicable) as recommended by Alaska DFG and would
maintain a buffer distance from the ordinary high water of Grant Creek and Grant Lake.
This buffer would reduce the potential for bank erosion and prevent ground disturbance
in these riparian corridors, minimizing opportunities for invasive plant establishment.
Project operation would also include occasional vehicular use of the project access
road, which could transport weed seeds into the project area. However, Kenai Hydro
would operate the project remotely, thus maintenance traffic would be infrequent.
Proposed recreation use of the project area may also transport invasive plants into and
around the project area. Increased hiking, hunting, boat use, and camping along access
roads, the transmission line corridor, and on Grant Lake may readily bring invasive plants
from outside the project area to substrates where they can become established.
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Therefore, Kenai Hydro’s proposed surveys would identify any need for additional
control measures.
Measures to control the spread of invasive species at sites where soil and
vegetation disturbance occurs is critical to limiting the spread of invasive weeds because
these are the most likely sites of new colonization. As such, Kenai Hydro’s proposal to
restore disturbed areas within 1 year upon completion of construction activities would
limit opportunities for potential establishment of invasive plant species. Kenai Hydro’s
proposed measures for protective buffers, site restoration, and survey and treatment of
invasive plant infestations would minimize effects on vegetation and would also limit
potential effects on special-status plant species discussed below.
Forest Service preliminary 4(e) condition 19 specifies Kenai Hydro develop an
aquatic invasive species management plan. However, we anticipate that Kenai Hydro’s
Vegetation Management Plan, with the modifications discussed above, adequately
addresses direct and indirect effects of proposed construction and operation of the project
on terrestrial resources.
Effects of Project Construction and Operation on Special-status Plants
Proposed project construction and operation could affect special-status plants by
removal or disturbance of individual plants, habitat loss or degradation, and introduction
and spread of invasive plants. To minimize the potential effects of project construction
and operation on special-status plant species that could occur on proposed project lands,
including the pale poppy, Kenai Hydro proposes to implement the following protection
and monitoring measures as presented in its Vegetation Management Plan:
• If any previously undiscovered sensitive plants are encountered on NFS
lands at any time prior to or during implementation of the project, the
Forest Service would be notified and an appropriate course of action would
be determined to avoid or mitigate disturbance.
• During the license period of the proposed project, a site-specific, sensitive
plant survey would be conducted prior to any new project-related, ground-
disturbing activities occurring on NFS lands. The survey would be done in
consultation with the Forest Service consistent with current sensitive plant
survey protocols.
• The target sensitive species list would be reviewed and updated prior to
sensitive plant surveys.
• A geographic information system database with records of sensitive plant
occurrences and invasive plant infestations would be queried as part of the
evaluation process for any new ground-disturbing activities.
• The existing pale poppy population within the project boundary would be
managed through monitoring surveys during years 1 and 5 after license
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issuance to assess the effects that operational activities could have on the
north shore Grant Lake population and its habitat.
Our Analysis
A small population of pale poppy occurs on NFS lands located in a floodplain
forest and scrub community near the north shore of Grant Lake. Although we do not
anticipate direct effects on the existing pale poppy population from project construction
or recreation activity, operational effects are possible because of the proposed 13-foot
seasonal drawdown of Grant Lake, which could affect soil moisture content for existing
populations.
The proposed lake level fluctuations of an additional 2 feet would be similar in
range to what currently occurs, but the proposed operation would follow a lake level rule
curve for drawdowns and subsequent refilling of the lake over time (see section 3.3.2.2,
Aquatic Resources, Environmental Effects). This additional storage would be on the
lower end of the fluctuation range, and, because of the steep-sided, sparsely vegetated
nature of most of the shoreline, we anticipate proposed project operation would have
minimal effects on shoreline vegetation including the existing pale poppy population.
The proposed lake level fluctuations could also potentially cause some additional
shoreline erosion or disturbance to riparian plant communities, but these effects would be
minimal compared to current lake level fluctuation patterns.
Although the Grant Lake water elevation drop to 690 feet during the early part of
the growing season may have an overall drying effect on pale poppy substrate, the pale
poppy should not be negatively affected because it is an upland species that is able to
grow in very dry habitats. Reservoir fluctuations may help to maintain suitable habitat
for the pale poppy by preventing the establishment of dense shrub thickets along the
shoreline. Pale poppy plants observed on nearby Cooper Lake are able to tolerate some
inundation and wave action during the growing season and ice scour during the winter
(FERC, 2006). Therefore, we anticipate that the existing population along the Grant
Lake shoreline would tolerate similar stresses.
However, potential indirect effects on sensitive plant species from the drawdown
of the lake could include introduction and spread of invasive plant species in both upland
areas in the vicinity of the pale poppy population and below the current high water level
in the drawdown zone. Currently, the only invasive plant species present in the vicinity
of the existing pale poppy population is common dandelion. Kenai Hydro’s Vegetation
Management Plan describes measures to assess whether the project is negatively
affecting the pale poppy population on NFS lands and establishes a framework for
adaptive management to modify project operation for sensitive plant management. This
plan also includes monitoring the known pale poppy population during years 1 and 5 after
license issuance to assess any potential operational effects on the population or its habitat.
The plan also details measures to help minimize the establishment and spread of invasive
plants in the vicinity of the pale poppy population and in the project area through timely
control. Implementing the Vegetation Management Plan during construction and
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operation would ensure that measures to protect sensitive resources, such as pale poppy,
are implemented appropriately.
Although we expect Kenai Hydro’s pre-licensing surveys were effective in
identifying sensitive species populations present in 2013, new pale poppy populations or
other Forest Service sensitive species could have become established within areas of
proposed disturbance. If Kenai Hydro modifies the Vegetation Management Plan to
include surveys for Forest Service sensitive species, including the pale poppy, within
areas of proposed ground disturbance prior to any ground-disturbing activities and
consults with the Forest Service if any new populations are identified, the potential for
effects on previously unidentified or recently established populations would be reduced.
This additional protective measure would benefit any population of pale poppy or Forest
Service sensitive plant population that may have established after licensing surve ys were
completed.
Use of Pesticides in Riparian Areas and on NFS Lands
Improper use of pesticides has the potential to affect untargeted vegetation or
wildlife species. Pesticide use near water features has the potential to affect water
quality. Such use could have adverse effects on terrestrial and aquatic resources in the
project area.
Forest Service final 4(e) condition 14 specifies that Kenai Hydro may not use
herbicides to control undesirable woody and herbaceous vegetation and aquatic plants,
and pesticides may not be used to control undesirable insects, rodents, and non-native
fish on NFS lands without the prior written approval of the Forest Service. The condition
specifies that Kenai Hydro submit a request to the Forest Service for approval of planned
uses of herbicides and pesticides covering annual planned use and that the request be
updated as required. The condition further specifies that Kenai Hydro’s requests include,
at a minimum, the following information for Forest Service review: (1) whether pesticide
applications are essential for use, (2) specific locations of use, (3) specific herbicides and
pesticides proposed for use, (4) application rates, (5) dose and exposure rates, and (6)
safety risks and time frames for application.
Forest Service final 4(e) condition 14 would also prohibit pesticide use on NFS
lands within 500 feet of known locations of the western toad or known locations of Forest
Service special-status or culturally significant plant populations. Additionally, the
condition specifies that application of pesticides must be consistent with Forest Service
riparian conservation objectives. The condition also specifies that Kenai Hydro use only
EPA-registered materials for the specific purpose planned and strictly follow label
instructions in the preparation and application of herbicides and pesticides and disposal of
excess materials and containers.
Although Kenai Hydro outlines BMPs for invasive plant management and control
in its Vegetation Management Plan, pesticide application and use is not included as a
measure. Kenai Hydro does, however, agree to support the Forest Service’s
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recommendations for approval prior to pesticide application and use and would adhere to
these conditions if incorporated into the license order.
Our Analysis
Forest Service final 4(e) condition 14 prohibits pesticide use on NFS lands within
500 feet of known locations of the western toad. However, no evidence exists to indicate
that the western toad occurs in the project area,57 so we do not see the need for Kenai
Hydro to provide specific buffers around western toad habitat.
Kenai Hydro’s annual request to the Forest Service for prior approval of planned
uses of herbicides and pesticides would improve coordination with the Forest Service and
support Forest Service riparian conservation objectives, particularly for special-status or
culturally significant plant populations.
Effects of Project Construction and Operation on Avian Communities
Vegetation clearing, construction noise, potential introduction and/or spread of
invasive plant species, construction and operation of transmission lines including ROW
maintenance activities, changes in lake and creek levels, and increased human activity
could affect avian communities during construction and operation of the project.
To minimize the effects of project construction and operation on avian
communities at the project, Kenai Hydro proposes to implement an Avian Protection
Plan, which seeks to limit avian mortality by:
• avoiding disturbances during the breeding season;
• designing the power lines per current Avian Power Line Interaction
Committee (APLIC)58 avian protection standards (APLIC, 2006, 2012) and
submitting final engineering plans to stakeholders and to the Commission
for approval, prior to construction; and
• minimizing vegetation removal and establishing vegetation removal
timelines to minimize disturbance during the avian breeding season (May 1
to July 15) during construction and operation.
57 Alaska DFG indicates the western toad does not occur on the Kenai Peninsula
and that the nearest known location to the project area is 50 miles to the east on
Montague Island http://www.adfg.alaska.gov/index.cfm?adfg=westerntoad.rangemap.
58 APLIC is a collaboration among numerous electrical utilities and research
groups and FWS that was formed to identify the causes of and develop methods and
designs to minimize avian electrocutions and collisions at power lines. APLIC has
released guidelines to address avian electrocution (APLIC, 2006).
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If Kenai Hydro could not completely avoid vegetation removal during the
breeding season, it proposes to complete a risk assessment to determine the periods
during which vegetation removal would cause the least impact on breeding birds.
Following finalization of its risk assessment, Kenai Hydro would develop a plan and
timeline to minimize effects on breeding birds resulting from vegetation clearing or other
disturbances during proposed project construction and operation. Kenai Hydro proposes
to conduct pre-construction nest surveys prior to vegetation clearing or removal activities
during the breeding season. Kenai Hydro proposes to use a qualified biologist to conduct
pre-construction pedestrian surveys in suitable habitat within 100 feet of the proposed
project (disturbance areas) 1 to 3 days prior to any vegetation removal. Kenai Hydro
proposes to establish 1,320-foot buffers around active raptor nests and 100-foot buffers
around active nests of other avian species and develop species-specific nest protection
plans in consultation with FWS that would document the specific methodology for
safeguarding the individual nest
Kenai Hydro also proposes to employ a third-party ECM for the duration of
construction, as described in section 3.3.2.2, Aquatic Resources, Environmental Effects.
As proposed, the ECM would be onsite during all vegetation removal activities to ensure
that construction activities avoid or minimize effects on avian species. Forest Service
final 4(e) condition 20 specifies, the ECM would have the authority to temporarily
suspend construction and vegetation removal if these activities were likely to result in
take of any species listed under the Migratory Bird Treaty Act or Bald and Golden Eagle
Protection Act. Kenai Hydro proposes that if the ECM were to suspend work, the ECM
would immediately consult with the appropriate agencies to determine the best course of
action to eliminate or minimize the potential for take. Construction activities would not
resume until an agreed upon action(s) had been implemented.
Kenai Hydro also proposes to implement its Vegetation Management Plan, as
described above to limit effects on vegetation communities that provide habitat for avian
species including measures to minimize the spread of invasive plant species.
FWS (10(j) recommendation 19) recommends that Kenai Hydro design and
construct the transmission line according to APLIC guidance (APLIC, 2006) to reduce
risk of electrocution to raptors and other avian species. Kenai Hydro agrees with this
recommendation and has included this measure in its Avian Protection Plan. Kenai
Hydro also proposes to incorporate measures from the APLIC (2012) guidance to reduce
avian collisions with power lines. Kenai Hydro proposes to submit its final engineering
plans to FERC and requisite stakeholders 59 for review and approval prior to construction.
These final engineering plans would detail applicable measures adopted from the APLIC
guidance.
59 We interpret this term to include FWS, the Forest Service, and Alaska DFG.
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Our Analysis
Vegetation clearing, noise, and disturbance associated with equipment and crews
would largely be restricted to the 18-month construction period. Many displaced birds
would likely move to abundant suitable habitat adjacent to the project site. Effects would
be greatest during the breeding season potentially resulting in disruption of feeding,
mating, and nesting activities. Permanent removal and temporary disturbance of
vegetation would result in the loss of some nesting, foraging, and cover habitat.
Avoiding or minimizing vegetation clearing activities during the breeding season
(May 1 through July 15), as proposed in Kenai Hydro’s Avian Protection Plan, would
limit effects during this sensitive period. If vegetation removal during the breeding
season is unavoidable, conducting pre-vegetation removal nest surveys and implementing
avoidance buffers around nests, as proposed, would reduce the potential for nest
abandonment and accidental damage to nests, adults, and chicks near construction areas.
However, it is not clear whether all construction activities would require vegetation
removal. Some activities, like blasting or instream work, may occur without associated
vegetation removal. As written, it is not clear how Kenai Hydro’s proposed plan would
ensure nest surveys are implemented prior to any construction effects with potential to
disturb nesting birds. Rather than framing survey schedules around pre-vegetation
clearing activities, as stated in the Avian Protection Plan, modifying the plan to require
nest surveys prior to any construction activities with potential to disturb nesting birds
would ensure all activities are included.
The 1,320-foot buffer proposed by Kenai Hydro for raptor nests is consistent with
recommendations in the National Bald Eagle Management Guidelines and should limit
impacts to nesting bald eagles, if present (FWS, 2007). Kenai Hydro’s proposed nest
surveys would identify any bald eagle nests with potential for disturbance associated with
construction noise or tree removal. However, loss of nesting habitat for bald eagles is
unlikely because no tree removal is proposed on the north and east sides of Grant Lake,
where cottonwood stands most suitable for bald eagle nesting occur. Kenai Hydro also
proposes to limit tree removal when re-routing the INHT, as described above in the
Effects of Project Construction on Vegetation Communities subsection. These activities
would not likely disturb cottonwood trees, which could provide suitable nesting habitat
for bald eagles or other raptors, because the trail is generally located in upland areas.
Upon completion of construction activities, implementation of Kenai Hydro’s
Vegetation Management Plan (see section 3.3.3.2 in the Effects of Project Construction
on Vegetation Communities subsection) would minimize effects on avian communities
due to habitat loss and disturbance by revegetating temporarily disturbed areas and
limiting the potential spread of invasive plant species. Because of the remote nature of
the proposed project, the Forest Service’s final 4(e) condition 20 would ensure that an
ECM is present and has the authority to stop work or issue change orders if there is an
unanticipated effect of project construction on environmental resources. Kenai Hydro’s
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use of an onsite ECM would also ensure that pre-construction nest surveys and nest
buffers are properly implemented.
The 1.1-mile-long, 115-kV transmission line is relatively short but could present a
collision risk and electrocution hazard for avian species that reside within or move
through the project area. Large-bodied birds, such as raptors and wading birds, are at
greatest risk because of their long wingspans that can reach between conductors. Larger,
less agile species are also less able to avoid collisions with transmission lines. APLIC
guidelines provide specific recommendations for conductor spacing and arrangement to
reduce the risk of avian electrocutions and provide descriptions of devices for marking
lines to increase visibility and allow birds to avoid collisions. Line-marking devices are
most effective when placed at stream crossings, near wetlands and ridgelines, or at other
locations along the line where avian densities are likely to be high and collision risk is
greatest such as the section of proposed transmission line that would be constructed
across Trail Lake Narrows. Design and construction of the proposed transmission line
with consideration to the APLIC guidance would reduce the risk of injury and mortality
to birds including several Forest Service species of special interest known to occur on
proposed project lands (e.g., northern goshawk, osprey, bald eagle, and trumpeter swan).
Kenai Hydro’s proposal to submit its final engineering plans to the Commission and
requisite stakeholders 60 for review and approval prior to construction, as included in its
Avian Protection Plan, would ensure that the transmission line is designed in a way that
effects on avian communities are minimized. These final engineering plans would detail
applicable measures adopted from the APLIC guidance.
Project operation would include lake level changes that could affect nesting
opportunities for shorebird (e.g., spotted sandpiper, semipalmated plover), waterfowl
(e.g., trumpeter swan, greater scaup), and other waterbird species (e.g., red-throated loon,
red-necked grebe) that nest in lacustrine habitats. During project operation, a 13-foot
drawdown would begin in winter and extend into late May, followed by a gradual return
to pre-drawdown levels from late May to early August. Most nesting birds associated
with lacustrine habitats nest prior to August, when the lake would not have fully returned
to pre-drawdown levels. Lower lake levels would increase the distance from suitable
nesting habitat associated with shoreline vegetation to the lake’s edge and expose
sections of steep, rocky terrain. Such changes could reduce the suitability of nesting
habitat by increasing the distance to aquatic foraging habitats and creating hazards for
vulnerable fledglings attempting to reach the lake in June and July when most species
young fledge. Therefore, the project could have some long-term effects on waterbird
species nesting around the perimeter of Grant Lake.
Changes in lake and creek outflow levels during the winter may indirectly affect
waterfowl that overwinter in the region, including trumpeter swans and diving ducks, by
60 We interpret this term to include FWS, Forest Service, and Alaska DFG.
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decreasing or altering open water habitat at the mouth of Grant Creek and at the outflow
at Trail Lake Narrows. Decreased open water availability could lead to decreased resting
and foraging habitat during the winter season, resulting in adverse effects on these
species. However, under proposed project operations, winter flows in Grant Creek would
be higher that current conditions. These flows would maintain, or potentially expand,
open water areas in Trail Lake Narrows. Therefore, we do not expect any adverse
project-related effects on the open water areas.
As described in section 3.3.2.2, Environmental Effects, Fishery Resources,
construction of the project could result in temporary adverse effects on fishery resources,
including salmonids, that provide prey resources for bald eagles and other piscivorous
raptors and water birds because fish would likely avoid areas near active construction.
However, construction plans would limit adverse effects on water quality, so adverse
impacts on fishery resources are not expected to persist in the long term. Additionally,
Kenai Hydro’s proposed project operation would benefit fishery resources by providing
higher winter flows that would provide additional rearing habitat. Therefore, we do not
expect project operation to have adverse effects on prey abundance for bald eagles along
with other piscivorous raptors and water birds.
Effects of Project Construction and Operation on Bears
Construction activities may result in temporary disturbance to bears on proposed
project lands. In addition, increased human presence associated with project construction
and operation could increase the risk of bear-human encounters.
FWS (10(j) recommendation 12) and Alaska DFG (10(j) recommendation 11)
recommend that Kenai Hydro prepare and implement a bear safety plan to minimize
potential bear-human encounters. Interior and Alaska DFG recommend that, at a
minimum, the plan include provisions for: (1) keeping construction sites and refuse areas
clear of substances that attract bears, (2) installing bear-proof garbage receptacles and
other measures during construction to prevent bears from obtaining food or garbage,
(3) minimizing possible conflict with bears during construction and operation, (4) dealing
with problem bears,61 and (5) notifying authorities of any bear-human conflict. In
response to these agency recommendations, Kenai Hydro has agreed to consult with
Interior and Alaska DFG to develop a bear safety plan.
Our Analysis
Vegetation clearing and other activities associated with construction may result in
temporary disturbance to bears on the proposed project lands due to noise and the
61 Although the agencies do not specifically define problem bears, we understand
this term to refer to bears that repeatedly visit a construction area despite implementation
of other measures in the plan, including trash management and use of bear-proof
containers.
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presence of equipment and crews, but would not be expected to affect bears in the long
term because effects of construction would be temporary.
Construction and operation of the proposed project would result in habitat
fragmentation associated with placement of the access road and transmission line ROW.
Unlike brown bears, black bears are highly adaptable to habitat disturbance and
fragmentation and tolerant of human-generated disturbance. However, the proposed
project would affect a limited amount of habitat compared to the large amount of nearby
suitable habitat; consequently, the potential for substantial effects from fragmentation on
bear habitat is limited.
The greatest potential for effects on bears could come from increased human
activity on proposed project lands during construction and operation, including ROW
maintenance activities. The risk of bear-human encounters is likely to increase
particularly with construction and maintenance workers, potentially leading to injury or
mortality for both humans and bears. Allowing non-motorized use of the project access
road, as described in section 3.3.4.2, in the Effects of Operation on Public Access
subsection, would also increase the risk of bear-human encounters for the public during
project operation.
Implementing a bear safety plan, as recommended in Interior’s 10(j)
recommendation 12 and Alaska DFG’s 10(j) recommendation 11, would reduce the bear-
human encounters and minimize effects on bears. Keeping proposed construction sites
and refuse areas clear of food or garbage and installing bear-proof garbage receptacles, as
recommended by Interior and Alaska DFG, would avoid attracting bears, limiting the
potential for bear-human encounters. Provisions for minimizing possible conflict with
bears during construction and operation, dealing with problem bears, and notifying
authorities of any bear-human conflict, which would be documented in the plan, would
further minimize effects on bears by ensuring agency staff are aware of any concerns and
can take appropriate actions to remove problem bears if needed.
Effects of Project Construction and Operation on Mountain Goats
Noise and disturbance produced by helicopters or other aircraft (if necessary) used
during construction of the proposed project could affect mountain goats within and near
proposed project lands.
FWS 10(j) recommendation 13 and Alaska DFG 10(j) recommendation 12
recommend that Kenai Hydro minimize the use of helicopters or airplanes near
mountainsides adjacent to Grant Lake and Grant Creek and maintain a 1,500-foot
distance between aircraft and mountain goats at all times.
In comments on the draft EIS, the Forest Service states that it has developed no-fly
zones to reduce these impacts to goats and sheep throughout the Forest and will provide
this information to Kenai Hydro. Forest Service recommends that these no-fly zones be
used for all helicopter and aircraft use associated with the project.
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Our Analysis
Alaska DFG notes that close-range flights can elicit strong negative responses in
ungulates, such as deer, moose, mountain goats, and elk, with mountain goats being more
susceptible to disturbance than other ungulates. Disturbance can cause mountain goat
groups to separate, including females and their dependent offspring, and individuals to
panic, potentially resulting in injuries and/or mortality. Following disturbances,
mountain goats may remain alert for up to several hours, reducing the time spent foraging
thereby resulting in increased energy expenditure and reduced nutrient intake.
Kenai Hydro does not indicate whether or not its construction plans include the
use of helicopters or other aircraft. However, if helicopters or other aircraft were used,
effects would most likely occur on south-facing slopes on the north side of Grant Lake,
the principal area of mountain goat use in the Grant Lake Basin, or to and from the
project. Mountain goats are most likely to occur on these slopes at high altitudes, about
2.5 miles north of the project. Potential effects from aircraft use during project
construction would be infrequent, if occurring at all, because the range and preferred
habitats of mountain goats occur at higher elevations than where the proposed project
would be constructed and largely outside the proposed project lands. Operation of the
project would not affect mountain goats because we expect helicopter or aircraft use
would be limited to the construction phase. Based on the topography near the project
area and the location of proposed project features, it is unlikely that approaching aircraft
would need to fly within 1,500 feet of mountain goat habitat. However, flight paths
frequently depend on line-of-sight visibility, and we cannot rule out the potential need for
a flight path near the north end of Grant Lake. Therefore, if Kenai Hydro were to use
aircraft to access proposed project lands, flight paths that maintained a minimum 1,500-
foot distance from the mountainsides identified with suitable habitat, as FWS and Alaska
DFG recommend, and follow Forest Service no-fly zones would minimize potential
effects on mountain goats occurring in the area.
Effects of Project Construction and Operation on Wildlife Movement,
Distribution, and Abundance
Construction of the proposed project would generate noise, increase human
presence and equipment activity, and disturb wildlife habitat. Operation of the proposed
project would alter existing flow levels in Grant Creek and potentially alter ice processes
on Grant Lake. These effects could affect the movement, distribution, and abundance of
wildlife, including Forest Service management indicator species and species of special
interest (see table 3-26).
Our Analysis
Noise and the presence of heavy machinery and construction crews could disturb
wildlife in the immediate vicinity of the project, including, including Forest Service
management indicator species and species of special interest (see table 3-26), causing
them to temporarily deviate from project construction areas. These potential disturbances
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would be limited to two construction seasons, as proposed by Kenai Hydro. Given the
extent of suitable habitat in areas surrounding the proposed project, temporary effects of
construction are not anticipated to result in permanent changes in distribution or
abundance or result in noticeable disruption of seasonal movement patterns for any
wildlife species.
Project operation would result in changes in lake levels during the winter. As a
result, ice processes on Grant Lake could be altered, which could affect wildlife travel
routes across Grant Lake if the project effects near shore ice structure or ice thickness on
the lake. Moose and grey wolf are most likely to be affected by alternation of ice
processes. However, as discussed in section 3.3.2.2, Aquatic Resources, Effects of
Project Construction on Water Quantity, project drawdowns would be gradual and would
generally not affect ice processes. As lake levels fall post freeze-up, near-shore ice
formations would subside and create uneven surfaces that could impede wildlife access,
but these areas would not prohibit wildlife crossing because we expect wildlife would be
able to cross the shore ice and access lake ice. We have not identified any evidence to
suggest project operations would affect ice thickness. Therefore, potential changes in ice
processes associated with winter lake drawdown are not anticipated to affect the size,
distribution, or abundance of terrestrial mammal populations on the Kenai Peninsula.
Project operation would result in changes in flow in Grant Creek (see figure 3-16),
which could have seasonal effects on littoral wildlife habitat at Trail Lake Narrows.
Because flows would remain within approximately 100 cfs of current flows, potential
effects on littoral wildlife habitat are expected to be minimal. Flows would be slightly
higher during winter and lower during the summer compared to existing conditions. As a
result, additional littoral habitat may be exposed during the summer, potentially
benefitting species that use these habitats, including birds, amphibians, reptiles, and
mammals. Therefore, seasonal effects on littoral wildlife habitat at Trail Lake Narrows is
not expected to adversely affect wildlife movement, distribution, or abundance.
Effects of Project Operation on Moose Browse Habitat
Operation of the proposed project would alter lake levels from natural conditions,
including the growing season (approximately June–September), which could affect
moose browse habitat at the upper end of Grant Lake.
Our Analysis
Operation of the proposed project would cause lake levels in Grant Lake to
fluctuate gradually throughout the year compared to existing conditions (see section
3.3.2.2, Water Quantity, Environmental Effects, and figure 3-6). These changes could
affect riparian vegetation structure and abundance of moose browse at the upper end of
Grant Lake. Based on mapping in the project area (Ebasco, 1984), about 80 acres of
moose browse habitat occurs at the upper end of Grant Lake.
From late July to January, lake levels would be about 1 to 4 feet higher than
existing conditions with the maximum lake level occurring in September (see figure 3-6).
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Topography and bathymetry data are not available to accurately quantify the extent of
inundation above the current highwater mark. However, based on aerial photos taken
during the site visit in 2010, we estimate the inundation zone would extend 15 to 20 feet
inland from the current highwater line. Inundation could result in the loss of some plants
in this area, but this loss is not expected to have a substantial effect on browse
availability. Of the preferred moose browse species that occur in the project area (young
willow, birch, aspen, and cottonwood trees), cottonwood and birch are most tolerant of
both flooding and extreme cold, and would therefore be less likely to be affected by
inundation. Additionally, disturbance associated with fluctuations in water levels and
movement of ice would lead to increased production of young shoots.
From February to early July, lake levels would be 1 to 7 feet lower than existing
conditions with the lowest level occurring in May (see figure 3-6). These lower levels
would occur during the growing season (June–September).
While generation of moose browse in the Grant Creek delta at the upper end of
Grant Lake is likely driven largely by riverine process associated with spring runoff,
lowering of the water table at the beginning of the growing season could reduce soil
moisture availability, potentially resulting in changes to vegetation density or species
composition over the long term. However, such affects would likely diminish with
distance from the Grant Lake shoreline. Moreover, annual rainfall in the area would be
sufficient to sustain preferred browse species despite proposed project-related
fluctuations in lake levels during the growing season. Average annual rainfall in the
region was 69.58 inches from 2000–2018 (NOAA, 2019b) and minimum annual rainfall
requirements for preferred moose browse species range from 7 to 35 inches (see table 3-
28; USDA-NRCS, 2019a, 2019b, 2019c, 2019d, 2016, 2008a, 2008b, 2006).
Additionally, none of the preferred moose browse species in the Grant Lake basin are
obligate wetland species and all of the species also occur in typically drier upland habitats
in Alaska.
Table 3-28. Minimum annual rainfall requirements for preferred moose browse species
in the Grant Lake basin (Sources: USDA-NRCS 2019a, 2019b, 2019c,
2019d, 2016, 2008a, 2008b, 2006).
Species
(Scientific Name)
Minimum Annual
Rainfall (inches) Habitat Characteristics
Sitka willow
(Salix sitchensis)
35 Found on or near lake shores, wetland
margins, forest edges, wet openings,
and clearings at low to middle
elevations.
Quaking aspen
(Populus tremuloides) 7 Occurs in a wide variety of habitats
(including soil type and moisture
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Species
(Scientific Name)
Minimum Annual
Rainfall (inches) Habitat Characteristics
conditions) and within a great range of
elevation.
Paper birch
(Betula papyrifera) 12
Widely distributed across northern
North America and adapted to a variety
of soils with ample moisture.
Black cottonwood
(Populus trichocarpa) 10
Grows on alluvial sites, riparian
habitats, and moist woods on mountain
slopes, at elevations of 0–6900 feet.
Sufficient rainfall combined with runoff processes, which would remain unaltered
by the project, should continue to provide adequate conditions for germination and
recruitment of moose browse despite changes in lake levels during the growing season.
Therefore, we anticipate that operation of the proposed project is expected to result in
only minor adverse impacts to moose browse habitat at the upper end of Grant Lake
because fluctuations in lake levels could alter vegetation community structure, but
rainfall and runoff process would likely sustain most preferred moose browse species and
allow for continued recruitment.
Effects of Project Construction and Operation on Access to Harvestable
Wildlife
Construction and operation of the proposed project could affect access to
harvestable wildlife on proposed project lands by providing access to Grant Lake and
surrounding lands via the project access road. Kenai Hydro proposes to restrict
motorized vehicle access. However, as discussed in section 3.3.4.2, in the subsection
Effects of Project Operation on Public Access, providing pedestrian access on the access
road would benefit recreational resources.
Our Analysis
Kenai Hydro’s access road could increase access for hunting mountain goat, bear,
and moose at Grant Lake and lands adjacent to the proposed project. However, Kenai
Hydro proposes to keep the road closed to unauthorized motorized vehicles. It is also not
anticipated that increased pedestrian access facilitated by the access road would result in
a noticeable increase in hunting in the area surrounding the proposed project. As
discussed in section 3.3.4.2, Recreational Resources, Environmental Effects most hunting
access to Grant Lake is through fly-in services. Therefore, we expect potential effects of
project construction and operation on access to harvestable wildlife to be negligible.
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3.3.4 Recreation Resources and Land Use
3.3.4.1 Affected Environment
General Recreational Setting
The overall landscape character near the project is natural with diverse
topography, large lakes, fast-moving rivers, alpine tundra, and taiga forest. Most of the
area is undeveloped with a few public recreation facilities. Long-standing trail systems
exist at and to the west of the project; ice fields extend to the east. Seward Highway,
connecting Anchorage to Seward, is the main route of access to the project and passes
about 1 mile west of the proposed powerhouse in a north to south direction. This
highway is designated a National Scenic Byway and is one of the most used highways in
the state. The maximum average daily traffic count on the highway in January and July
2012 was 611 and 3,802 vehicles, respectively.
Few developed recreation facilities are available near the project. Almost all
recreation use is either trail- or water-based (figure 3-24). Water features used for
recreation include Upper and Lower Trail Lakes, Vagt Lake, and Grant Lake. The
community of Moose Pass has commercial docks used for aerial sightseeing—also
referred to as flightseeing—and a shallow-sloped gravel beach that provides boat launch
access to Upper Trail Lake. The Vagt Lake Trailhead (near milepost 25 of the Seward
Highway) has an area that was used in the past to access Vagt Lake Trail and as an
informal boat launch for Lower Trail Lake. However, ARRC, the landowner, gated the
road leading to this area to prohibit vehicular access because of public safety concerns
near the adjacent railroad tracks. The only other trailhead parking available is along the
road leading to private homes and Crown Point Mining Road. The Vagt Lake Trailhead
is a designated access point for accessing the planned INHT 62 route by using the Vagt
Lake Trail. Alaska DNR (2004) Final Finding and Decision to Grant a Public Easement
for the Iditarod National Historic Trail states the intent to upgrade this trailhead to
accommodate up to 50 vehicles. The Forest Service-selected alternative for
implementing the INHT Comprehensive Plan also describes the agency’s intent to
develop the Vagt Lake Trailhead (Forest Service, 2004),63 and the Forest Service
provided a design of the planned development to FERC staff (email from K. Kromrey,
62 The INHT is a system of constructed and planned routes connecting Seward and
Nome. Existing refers to constructed trail segments, planned refers to the trail segments
the Forest Service plans to construct, and proposed re-route refers to Kenai Hydro’s
proposed route to relocate the planned INHT route away from the project infrastructure.
63 The map for the Trail Lakes area states: “Vagt Lake (MP 25.5) (to be
reconstructed as part of the Seward Hwy MI 18-25.5 project.”
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Recreation Program Manager, Chugach National Forest, Anchorage, AK, to K. Olcott,
Outdoor Recreation Planner, Commission, Washington D.C., April 18, 2018).
Trails
The project is near three established trails and a portion of the planned INHT route
(figure 3-24). Vagt Lake Trail begins at a trailhead located at about milepost 25 of
Seward Highway and connects to the southern end of Vagt Lake where it joins the
planned INHT route and continues about 0.5 mile, terminating at the western shore of
Vagt Lake. The trail is closed to saddle and pack stock from April 1 to June 30 and
motorized vehicles from May 1 to November 30.
Saddle Trail begins at the eastern shore of Upper Trail Lake and connects to Grant
Lake about 1 mile north of the Grant Creek outlet. The trail is accessible at the shoreline
by boat or canoe in the summer and by snowmachine or cross-country skis in the winter.
This trail is a point of access for the planned INHT route and is managed for non-
motorized use during the summer and motorized use during the winter.
Case Mine Trail, located a mile north of Saddle Trail, is accessed from Upper
Trail Lake. In the winter, access is available by cross-country skiing or snowmachine. In
the summer, most visitors access the trail using a railroad bridge that crosses Upper Trail
Lake immediately west of Moose Pass; ARRC considers such use as trespassing.
Motorized use on this trail is authorized for a current federal mining claim holder for
mining purposes, but recreational motorized use is not allowed on this trail. The trail
connects to the northern shore of Grant Lake at the north-south/east-west bend in the
lake.
The INHT, a trail in the National Trails System, traverses about 2,000 miles of
western Alaska and extends from Seward to Nome following the routes as depicted on
maps identified as Seward-Nome Trail in the Bureau of Outdoor Recreation's National
Trail System recommendation to the President and Congress (U.S. Bureau of Outdoor
Recreation, 1977). Certain portions of the INHT are currently developed and in use,
while other sections are planned but not yet constructed. Figure 3-25 shows the planned
and constructed routes of the INHT in the vicinity of the project.
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Figure 3-24. Recreation facilities, trails, and public roads near the Grant Lake Project
(Source: Kenai Hydro, 2018a, as modified by staff).
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Figure 3-25.Planned and constructed INHT routes in the vicinity of the project (Source:
personal communication, K. Kromrey, Recreation Program Planner, Chugach National
Forest, Anchorage, AK, and K.Olcott, Outdoor Recreation Planner, FERC, Washington
DC, March 5, 2019).
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The INHT is a system comprising a primary trail route of about 1,000 miles
connecting Seward and Nome and more than 1,300 miles of other trails, which connect
with gold strikes, communities, and access points (i.e., connecting trails). The National
Trail designation mandates that the Secretary of the Interior is responsible for the INHT
and development of a management plan for the INHT that:
• identifies the historic INHT system and side and connecting trails;
• identifies all significant natural, historic, and cultural resources to be
preserved;
• includes specific objectives and practices to be observed in the management
of the INHT;
• describes details of any anticipated cooperative agreements to be
consummated;
• describes procedures for establishing a uniform marker for the INHT and
providing markers to cooperating agencies; and
• identifies access needs to the INHT where appropriate and acquisition
needs for significant sites or segments.
The designation also directed the formation of an advisory council with the
following members:
• a member of each federal or independent agency administering land
through which the INHT route passes;
• a member to represent the State, appointed by the Governor; and
• one or more members appointed to represent private organizations and
individual landowners or land users who have an established and
recognized interest in the INHT.
Bureau of Land Management prepared the comprehensive management plan for
the INHT (INHT Plan) in 1986 (BLM, 1986). A plan objective states that public use of
INHT segments should be encouraged, protected, and managed to the extent that such use
does not affect the historic values of the INHT, and ROWs, easements, management
corridors, cooperative agreements, and access improvements will all be used to meet this
objective. Because the INHT crosses lands managed by several agencies, these entities
have entered into agreements that commit the agencies to a cooperative management
philosophy for the trail and the specific objectives stated in the INHT Plan.
Today, the Alaska Railroad follows the primary historic route of the INHT
between Seward and Girdwood, and the Seward Highway closely parallels this route.
The planned INHT segment in this area bypasses the railroad ROW and Seward Highway
and is, therefore, a commemorative route. The INHT Plan direction for this INHT
segment is to:
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• construct a parallel recreational trail between Seward and Portage adjacent
to, but outside, existing railroad and highway ROWs;
• brush and mark a route as determined by the Forest Service; and
• reserve an adequate ROW on this proposed route to provide both summer
and winter access.
The INHT Plan identifies specific historic site recommendations, lists priority sites
for management (e.g., cabins and mines), and specifies constructing and improving
structures such as shelters and air strips for each segment of the INHT. Eight priority
sites are listed for the INHT segment between Seward and Girdwood, but none of these
sites are near the project, and no construction or improvements are specified for this trail
segment.
Certain portions of the trail are currently developed and in use, while other
sections are planned but not yet constructed. The route for the section of the planned
INHT near the project area has been laid out, flagged and brushed but not constructed.
The Forest Service has obtained a 100-foot-wide easement from the State of Alaska
(Alaska DNR, 2004) for constructing and maintaining the INHT along the west shore of
Vagt Lake, continuing north to cross Grant and Trail Creeks (figure 3-24). The planned
route crosses Grant Creek, generally in a north to south direction, near the proposed
powerhouse. The State of Alaska currently reserves a 1,000-foot-wide corridor for
managing land adjacent to the INHT consistent with the INHT Plan.
Recreation in the Project Vicinity
Grant Lake and the surrounding area provides settings for many recreational
activities.
Alaska DFG states that it does not consider Grant Lake to be a fishing destination
but reports some angling use in Lower Trail Lake, Vagt Lake, and Grant Creek
downstream of Grant Lake. Grant Lake is also a drop-off location for mountain goat,
bear, and moose hunting; however, Kenai Hydro’s recreation observations indicate the
area near Grant Lake probably receives low hunting use.
Most recreation activities occurring in the vicinity of the project are associated
with water, trails, and scenery and include hiking/walking, cycling, camping, fishing,
boating, hunting, using snowmachines, snowshoeing, cross-country skiing, ice fishing,
aerial sightseeing, and driving for pleasure.
The level of use varies seasonally with much higher use occurring in the summer
than in the winter. Summer uses include hiking on Vagt Lake Trail; camping at Vagt
Lake; fishing in Upper Trail Lake, Lower Trail Lake, and Vagt Lake; hiking on Saddle
Trail and Case Mine Trail; and small aircraft takeoffs and landings at Trail Lake. During
its recreation surveys, Kenai Hydro observed small watercraft use on Upper and Lower
Trail Lakes and observed an aluminum boat at Grant Lake in 2014, but it was not in use
at the time observed. Surveyors recorded about 12 anglers on Grant Creek over the entire
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summer and fall 2013 data collection period. Kenai Hydro reports that most anglers
would probably have boated to Grant Creek to fish because hiking to the creek would be
difficult. Kenai Hydro observed motorized trail use at the Vagt Lake Trailhead and
observed some motorized vehicle use on the Case Mine Trail and from Trail Lake to
Grant Lake. Kenai Hydro attributes this use to the mine permit holder.
At four monitoring locations near Moose Pass, Kenai Hydro observed 1,679
visitors between March 2014 and September 30, 2014 (figure 3-26). The majority of
summer visitors were identified as hikers and most (1,151 visitors) used the Vagt Lake
Trail. More than 300 visitors were observed using the monitoring locations for short
periods, possibly using these areas as a rest stop along Seward Highway (noted on figure
3-26 in the Break category). More than 200 people visited the area to fish, and motorized
activity was fairly low with only 11 visitors using the trails with off-highway vehicles or
dirt bikes.
Figure 3-26. Number of summer visitors observed by monitoring location and recreation
activity (Source: Kenai Hydro, 2018a, as modified by staff).
Kenai Hydro also observed and recorded winter use near the project. Surveyors
made three trips to the Vagt Lake Trailhead, Saddle Trail, railroad trestle near Moose
Pass, and Grant Lake. In March of 2013, Kenai Hydro observed high levels of
snowmachine use originating at the Vagt Lake Trailhead and continuing northeast across
Lower Trail Lake to a partially flagged route leading to Vagt Lake. Another starting
point was in Moose Pass, near an existing boat ramp. Other snowmachine users were
observed traveling north-south along the western shores of Upper and Lower Trail Lakes
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and across Upper Trail Lake toward Johnson Pass. Users did not ride through Trail Lake
Narrows (i.e., the channel between Upper and Lower Trail Lakes) because the
watercourse was not frozen. This condition appears to be a normal occurrence, keeping a
portion of Lower Trail Lake with open water during the winter. Open water was also
observed at the railroad trestle, located between Moose Pass and the rail line. Despite
signs prohibiting public access, users traveled on the railroad tracks for passage around
these open water areas. Kenai Hydro observed evidence of cross-country ski, snowshoe,
and ice skate use on Grant Lake from visitors using the Case Mine Trail and the Saddle
Trail but did not observe any sign of snowmachine use. Kenai Hydro’s observations in
the winter of 2014 and 2015 showed the same lack of snowmachine use at Grant Lake;
however, snow levels were low in those periods. Kenai Hydro found no evidence that the
informal trails that parallel Grant Creek are used for winter access to the creek or Grant
Lake. Steep terrain, dense vegetation, and the lack of formally constructed trails likely
limit snowmachine use along Grant Creek.
Land Use
Land surrounding most of Grant Lake is public land managed by the Forest
Service as part of Chugach National Forest. Land between Grant Lake and the Seward
Highway is mostly owned by the State of Alaska and managed by Alaska DNR. Limited
private ownership (mainly rural residential) exists in the lower portions of the Grant
Creek drainage and along Seward Highway. Four active mining claims are located on
federal lands on the north side of Grant Lake’s lower basin (figure 3-27).
Applicable land management guidelines are described in the Kenai River
Comprehensive Plan (Alaska DNR, 1997), Kenai Area Plan (Alaska DNR, 2001), and
Chugach National Forest Revised Land and Resource Management Plan (Forest
Service, 2002).
Kenai River Comprehensive Management Plan
The Kenai River Comprehensive Management Plan (Alaska DNR, 1997) proposes
incorporating a number of state parcels adjoining Trail Lakes and Trail River into the
Kenai River Special Management Area and proposes that these actions be accommodated
within the Kenai Area Plan (see below). It also proposes providing a 200-foot vegetated
buffer along the shore of the lakes and river. Alaska DNR notes these actions are to
protect fish populations and resources of the Kenai River.
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Figure 3-27. Land ownership in the vicinity of the Grant Lake Project (Source: Kenai Hydro, 2018a, as modified by staff).
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Kenai Area Plan
The Kenai Area Plan contains goals, objectives, and management direction for
state lands in the planning area near the Kenai River. The plan contains general
guidelines applicable to all state lands and specific guidelines pertaining to land in
designated management units. Some of the plan’s general guidelines applicable to land
near the project include:
• Public Recreation and Tourism
Authorizations may be allowed adjacent to public recreation facilities,
including public use cabins, lodges, or fuel stops, if Alaska DNR
determines that the two uses can be made compatible by design, siting, or
operating guidelines or if no feasible and prudent alternative exists for the
activity. This guideline also applies to sites reserved for future recreation
facilities.
Facilities on state-owned uplands and tide lands should be located and
designed to blend in with the natural surroundings. Stipulations to
accomplish this guideline may be attached to a development plan to address
location, size, color, materials, requirements for vegetative or topographic
screening, or other measures as appropriate.
Seward Highway Scenic Byway (Corridor Development Areas 64). The
scenic buffer (150 feet outward from the ROW boundary) shall remain in
its undeveloped, natural state, except to provide reasonable access from the
highway to private or public lands on either side of the highway. These
access roads serve several individual road or driveway access needs by a
single access through the scenic buffer wherever possible, to avoid
proliferation of individual roads or driveways through the buffer. Physical
access from the highway to private or public lands shall be located no
closer than 500-foot intervals. Access to private or public lands should be
located in such a manner as to provide access to either side of the highway
at one point of intersection. A wider or narrower buffer strip can be
reserved, depending on vegetative cover, the view from the roadway,
topography, highway noise levels, expected future needs for additional
transportation facilities, or other relevant factors.
No utility line or lines may be placed or constructed within the scenic
buffer, except to directly cross the scenic buffer to serve adjacent
properties, or they may be placed along the exterior 25 feet of the scenic
64 The plan has three corridor classifications: Corridor Nodal Development Areas,
Corridor Development Areas, and Corridor Preservation Areas. The management units
near the project are classified as Corridor Development Areas.
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buffer (the portion farthest from the highway ROW) to serve any properties
as long as the primary function of the buffer is not impaired.
• Trails and Access
When conveying land or issuing authorizations along the INHT the
authorization or conveyance is subject to the route (or alternate route) and a
buffer along the route that ensures continuous trail links along the INHT.
The route is protected by a 1,000-foot-wide corridor (500 feet on each side
of the centerline). This width allows flexibility to re-route the trails within
the corridor, separate motorized and nonmotorized uses on individual trails
within the corridor and includes a visual and sound buffer between the
recreation corridor and adjacent uses. To minimize potential land use
conflicts or the impact of the trail’s existence on adjacent land uses, the
corridor width may be expanded or reduced. These width adjustments, as
well as rerouting of the trail corridor, may be permitted in specific
instances.
The trail corridor width may be reduced to a minimum width of 400 feet
where the adjacent land use would not adversely affect the trail experience.
A wider corridor may also be desirable in certain instances to incorporate
high-quality adjacent-land features and scenery or to buffer the impacts
from adjacent land uses including high-density residential, industrial, or
commercial uses.
No permanent structures or equipment should be placed within the trail
corridor if they could adversely affect the trail experience unless the
management intent for the unit specifically allows for it. Where necessary,
trail crossings may be permitted to allow access to lands on both sides of
the trail.
The plan also states that the intent of the guidelines applicable to the INHT
is not necessarily to protect the fidelity of the original INHT route, as much
as to provide a suitable route that captures the idea of a continuous trail
between Seward and Turnagain Arm.
Regarding land use in corridors, land use activities within a trail corridor
(for example, permits, leases, timber sales and material sales) should be
managed so as to not adversely affect trail use over the long term or the
aesthetic character of the trail. This does not preclude trail crossings or
rerouting of trails. Rerouting of trails for a short distance may be permitted
to minimize land use conflicts or to facilitate use of a trail if alternate routes
provide opportunities similar to the original. If trails are re-routed,
provision should be made for construction of new trail segments if
warranted by type of use. Historic trails which follow well-established
routes should not be re-routed unless necessary to maintain trail use.
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The project is within or adjacent to at least three management units identified in
the Kenai Area Plan (figure 3-28). Table 3-29 lists the resource or use for which the unit
is designated and the management intent for each unit in addition to the land
classifications correlated to the land use designations. The land classifications are the
formal record of uses and resources for which state of Alaska lands will be managed.
Chugach National Forest Land and Resource Management Plan
Lands east of the western shore of Grant Lake lie within Chugach National Forest.
The Forest Service manages these lands in accordance with direction contained in the
Revised Land and Resource Management Plan for Chugach National Forest. The Forest
Service also has construction and management responsibilities for the INHT in the
vicinity of the project.
The Forest Service manages the area in and around Grant Lake as part of the
Kenai Mountains Roadless Area to meet goals for improved and developed recreation
opportunities, while maintaining landscape character and providing for timber
management. Grant Lake has a management prescription for Fish, Wildlife, and
Recreation Management and extending to the east, areas managed as Backcountry begin
about 1 to 5 miles north and east of Grant Lake.
Under, Fish, Wildlife, and Recreation Management, the Forest Service manages
the area around Grant Lake to provide a variety of habitats for fish and wildlife species
and year-round recreational opportunities in both developed and dispersed settings.
Ecological processes, as moderately affected by human activity, dominate lands managed
under this prescription. These areas may have evidence of resource management and
improvements for fish and wildlife habitat and provide a wide range of recreation
opportunities. Opportunities for solitude and quiet may be limited because of frequent
contact with other users near the road or trail systems. People should expect some
challenge and a degree of risk when traveling cross-country in areas with this
designation. The Recreation Opportunity Spectrum for the area near the project is semi-
primitive motorized, and the scenic integrity objective for these lands is “moderate.”
Land with this designation has evidence of human use such as trails, hardened campsites
and historic structures. Historic cabins, trails, and aboveground features may be
stabilized with limited onsite interpretation. Roads and trails may be present and new
roads may be built for resource management activities or providing access to trailheads,
camping areas or recreation concentration areas. These roads, however, may be closed
either seasonally or year-long to meet wildlife habitat objectives. Examples of use and
occupancy activities consistent with the management intent of lands with this designation
include campgrounds, new roads and trails, utility systems, administrative and permitted
motorized access, and parking lots at trailheads.
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Figure 3-28. Kenai Area Management Plan management units near the project. Unit
numbers are highlighted in yellow (Source: Alaska DNR, 2001).
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Table 3-29. Land use designations and management direction for Kenai Area Plan management units (Source: Alaska
DNR, 2001).
Management Unit No. and
Name
Land Use
Designation
Resource or Use for Which Unit is Designated and
Management Intent
380G—Lower and Upper
Trail lakes shorelines
Habitata
Public recreation and
tourism—dispersed
useb
The east side of the Trail River and Lake system used as a brown
bear movement corridor between Trail Creek and Snow River
drainages. Important Kenai River habitat and recreation values.
Scenic waterfall at the outlet of Grant Lake and precipitous
mountain walls with a relief greater than 3,500 feet on the east
shore of the lake. Riparian habitat values for Kenai River fishery,
scenic viewshed from Seward Highway. Grant Creek is an
anadromous fish stream below the falls that prevent fish passage to
Grant Lake. Lower creek supports king, coho and sockeye salmon
spawning. The riparian and lacustrine areas provide habitat for
mink and river otters. Moose use unit for winter range. Mountain
goat winter habitat between 500 and 1,000 feet. The INHT
traverses this unit. Manage for trails-related recreation.
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Management Unit No. and
Name
Land Use
Designation
Resource or Use for Which Unit is Designated and
Management Intent
381—West Shore Grant
Lake
Habitata
Public recreation and
tourism-dispersed useb
Trail and lake-oriented recreation. The Grant Lake Trail (also
known as Case Mine Trail), Al Solar's Mill Road, and Plateau
Trail pass through this unit. Spectacular relief including very
steep mountain wall rises east of Grant Lake. This unit is part of a
brown bear movement corridor between Trail Creek and Snow
River drainages. Grant Creek is an anadromous fish stream below
the falls which currently prevent fish passage to Grant Lake.
Moose, rutting and winter concentration area. In the lake adjacent
to this unit: ducks and geese, general distribution; freshwater fish,
general distribution of rainbow trout and Dolly Varden/Arctic
char. The portions of this unit that are in the SE 1/4 SE1/4 of
Section 6 and within Section 8 should be added to the Kenai River
Special Management Area.
608—Trail River, Upper
and Lower Trail Lakes
Habitata
Harvesta
Public recreation and
tourism-dispersed useb
Important Kenai River habitat and recreation values. River and
lake are important for salmon production and migration, high
value resident fish, bear feeding, and swans. High value
waterbody for public recreation.
a Corresponding land classification is land primarily valuable for: (1) fish and wildlife resource production, whether
existing or through habitat manipulation, to supply sufficient numbers or a diversity of species to support commercial,
recreational, or traditional uses on an optimum sustained yield basis; or (2) a unique or rare assemblage of a single or
multiple species of regional, state, or national significance.
b Corresponding land classification is land that is suitable for recreation uses, waysides, parks, campsites, scenic
overlooks, hunting, fishing or boating access sites, trail corridors, or greenbelts along bodies of water or roadways.
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Grant Lake, on NFS lands, is designated for winter motorized use. The Forest
Service has an easement from the State of Alaska for the Case Mine Trail, which is
managed for non-motorized use during both winter and summer, although the holder of a
mining claim is allowed motorized vehicle access during the summer. The Forest Service
also manages the Saddle Trail, which is listed as an INHT access trail and managed for
non-motorized use during the summer and motorized use during the winter.
3.3.4.2 Environmental Effects
Recreation Resources
Kenai Hydro proposes to construct project infrastructure in an area that has no
development, is used for dispersed recreation, and is in within and adjacent to the
easement to construct the planned INHT segment. This section analyzes the effects of
proposed measures, 4(e) conditions, and recommendations pertaining to public access,
recreation use, and INHT.
Effects of Construction on Public Access
Construction activities would require restricting public access for safety and
security reasons for about 18 months when Kenai Hydro would need to prohibit the
public from accessing a broad area extending from Seward Highway eastward to Grant
Lake, including the Grant Creek corridor. In the event of any temporary trail closures as
a result of construction activities, Kenai Hydro would temporarily construct short-term
re-routes of the specific trail to facilitate continued use during project development.
National Park Service (Park Service) preliminary 10(a) recommendation 3
recommends that Kenai Hydro establish a project status website to provide real-time
information to the public about the status of access to the area, install signage at key
locations, and provide a public point of contact.
Our Analysis
Kenai Hydro’s study shows that few visitors use the area, and when they do, they
mainly use it for dispersed uses such as hiking, fishing and snowmobiling. Most of this
use is associated with Vagt Lake, which is about 0.5 mile south of and not near the
construction area. Consequently, area closures for the 18-month construction period
would affect very few visitors. Anglers would still have access to Grant Creek along the
streambank trails, and hikers would still have access to Grant Lake along the Saddle Trail
and Case Mine Trail. We have not identified any effects of construction on aerial
sightseeing operations. Therefore, minimal benefit would be realized by providing a Park
Service-recommended public outreach program to provide construction information.
Effects of Operation on Public Access
After construction, Kenai Hydro would fence areas near the powerhouse,
penstock, tunnel, tailrace, and other project infrastructure to prohibit public use. Kenai
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Hydro would also construct a 1-mile-long, 24-foot-wide, double-lane, graveled surface
powerhouse access road with a new bridge to span Trail Lake Narrows and a 0.9-mile-
long, 16-foot-wide, single-lane, graveled surface road to access the intake at Grant Lake.
The transmission line route would mostly parallel the powerhouse access road, cross
Seward Highway, and continue to the west. Kenai Hydro would gate the powerhouse
access road to prohibit public access near Seward Highway.
Our Analysis
The proposed project would result in the public no longer being able to access
from about 5 to 10 acres near the powerhouse, detention pond, and laydown area,
including a portion of land along the south side of Grant Creek and near the intake
facilities (about 1 acre). With an observed annual use of only 12 anglers fishing in Grant
Creek during Kenai Hydro’s study, the result of this closure of land to public use would
have a minor effect on angling. Further, public use would only be prohibited for about
100 feet along the southern shoreline in the vicinity of the powerhouse while the
remainder of Grant Creek (about 0.5 mile) would be available for public use. Because
Kenai Hydro’s study showed no boating or snowmachine use of Grant Lake, prohibiting
public use near the intake would not likely affect this use. Although Kenai Hydro would
prohibit the public from snowshoeing and cross-country skiing (the only two observed
uses at Grant Lake near the intake), the area where the public would be excluded would
be extremely small compared to the 1,741-acre footprint of Grant Lake that would be
remain available for this use.
The project access road would provide a new point of access to otherwise
undeveloped land. Because non-motorized trail and off-highway vehicle uses are popular
activities in this area, the access road could attract such uses. Kenai Hydro’s proposal to
install a gate and no trespassing signage on the access road would minimize potential use
of the access road and address concerns about encouraging motorized access where none
currently exists. Kenai Hydro believes the gate, signage, and absence of a parking area
would deter public use of the access road. However, the amended final license
application provides examples of recurrent trespassing on ARRC’s land near the project
by those seeking recreational access to adjacent land, and it is likely that without vigilant
monitoring and enforcement, similar activity would also exist at the project access road,
with motorized vehicle use on project lands.
Prohibiting public motorized use of the access road in the summer would address
local residents’ concerns about encouraging motorized use near the project and would
reduce the potential for unauthorized motorized use and on adjacent NFS lands.
However, allowing non-motorized access to Grant Lake via the access road would be
consistent with land management objectives for state and federal lands near the proposed
access road to allow and encourage trail use, and it would not interfere with Kenai
Hydro’s ability to operate and maintain the project. The road would provide a third route
of access to Grant Lake, potentially increasing dispersed recreation opportunities at the
lake and the number of visitors to the lake. This additional route could also increase
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access to the area for hunting. Unless a parking area were provided to support this use, it
is likely the public would park along Seward Highway, causing public safety concerns
about pedestrians crossing or walking along the highway and railroad tracks as well as
congestion along the highway. These concerns could be addressed if a parking area were
collocated with the access road gate at a distance from Seward Highway and the railroad
corridor. An appropriate location may be at the 9,000-square-foot area that would be
disturbed for bridge construction. Installing a single unit vault restroom at the parking
area would minimize effects of improper sanitation, which have been documented at
other trailhead parking areas in the region where restroom facilities are not provided.65
Developing a public access plan would provide an integrated approach for
managing public access near the project that considers public safety, security for project
infrastructure, O&M, and compliance with rules and regulations applicable to state and
federal lands occupied by the project. Elements of a public access plan may include:
• Descriptions and maps showing locations roads, trails (including the
planned INHT route), gate(s), signs, and a parking area with a single-unit
vault restroom between and including Seward Highway and Grant Lake;
• Designs for gates and signs (including sign messages);
• Methods used for monitoring gate effectiveness and vandalism;
• Procedures and schedules for maintaining gate(s);
• Descriptions, by location, of allowable types access (e.g., motorized, non-
motorized) in winter and non-winter months;
• Identification of the applicant’s responsibility for operating and maintaining
roads, gates, signs, parking area (including single-unit vault restroom);
• Consultation with state and federal land management agencies about plan
content, including Alaska DNR, Forest Service, and Kenai Borough; and
• Methods for periodically reviewing plan effectiveness and the process to
implement revisions, if needed, to achieve plan objectives and protect
environmental resources.
The bridge across Trail Lake Narrows would span the watercourse about 20 feet
above the water surface. Boats use Trail Lake Narrows, and the clearance would be
sufficient to maintain boating access at this location. Because Trail Lake Narrows does
not usually freeze, generally making it unsuitable for snowmachine use, the bridge would
not affect snowmachine use.
65 See draft environmental impact statement meeting transcripts, filed January 9,
2019 (accession number 20190109-4006).
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Effects of Project Operation on Recreational Use
In addition to the effects related to access, project-related reservoir fluctuations
and modified flows in Grant Creek could affect recreation activities.
Our Analysis
The lower winter water surface elevation would not have an effect on the existing
winter recreation activities at Grant Lake. The additional 3.5-foot drawdown would
gradually occur and not cause ice settlement, which would create an unstable surface.
The suitability of the surface of Grant Lake for winter activities would continue to
depend on climatic factors (e.g., snow, temperature) and opportunities for snowmachine,
cross-country ski, snowshoe, and ice skate use would be the same as what currently
exists. Because most of the observed use at the lake in June, July, and August consisted
of hikers and this use is not water-dependent, any change in elevation caused by the
project would not affect the existing uses. In September through November, the water
surface would be 3 to 4 feet higher than currently exists and the resulting increased water
surface area would not diminish access for hunters using float planes.
Kenai Hydro would create an off-stream detention pond to provide a storage
reservoir for flows generated during rare instances when the units being used for spinning
reserve were needed for the electrical transmission grid. By diverting increased flows
from generation into the detention pond and slowly releasing flow back into Grant Creek,
this operation would prevent a sudden increase in the water surface levels of Grant Creek.
Because flows would slowly change and angling use in the reach is low, the expected
fluctuation would not affect angling in Grant Creek.
Iditarod National Historic Trail
To construct the commemorative segment of the INHT, Alaska DNR issued a 100-
foot-wide easement to the Chugach National Forest within a 1,000-foot-wide corridor
reserved to the State of Alaska (figure 3-29). Kenai Hydro’s proposed project
infrastructure including the powerhouse, penstock, detention pond, transmission line, and
access road would be located within or cross a portion of this easement and management
corridor.
Kenai Hydro proposes to re-route the planned INHT (figure 2-1) and construct the
portion of the re-routed trail between Vagt Lake and Grant Creek.
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Figure 3-29. Planned INHT route near the proposed project infrastructure (Source: Kenai Hydro, 2017a, as modified by
staff).
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Forest Service final 4(e) condition 21 contains requirements related to placement
of project infrastructure near the planned INHT route. This condition would require
Kenai Hydro to:
• coordinate with the Forest Service on design and development of the access
road at its intersection with the INHT;
• account for potential drainage effects in the design of the access road and
be responsible the incremental expense of drainage features resulting from
the project;
• maintain and reconstruct the trail associated with any damage caused by the
access road;
• consult with the Forest Service to ensure trail function, operability, and
sustainability remain intact;
• bear additional costs for the trail and bridge caused by penstock
construction;
• during construction and 5 years thereafter, remove down trees caused by
project construction;
• provide administrative access on the project access road to the Forest
Service;
• develop a scenery management plan (Condition 19); and
• prevent public access from the INHT to project facilities.
The Park Service recommends (preliminary 10(a) recommendation 1) that Kenai
Hydro convene a work group to evaluate other INHT re-route alternatives if the license
allows locating the powerhouse within the INHT corridor as identified in the existing
easement granted to the Forest Service. The Park Service recommends the Commission
establish a budget and schedule for completion of this process.
In response to agency concerns, Kenai Hydro identified an alternative trail route
that would provide separation between project infrastructure and the INHT and benefit
visitor use by providing enhanced views of Trail Lake and background mountain peaks.
Despite these positive attributes, the Forest Service and other agencies, organizations, and
individuals do not support the proposed trail location because the proposed route would
not support traditionally associated trail activities (e.g., snowmachine use), has sharp
turns and steep changes in grade, would be about two times longer than the planned
route,66 and does not follow a more desirable general north to south trending direction.
66 The existing route is about 3,800 feet long and the re-routed trail would be about
8,400 feet long.
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Our Analysis
We analyze the effects of the proposed measure, Forest Service final 4(e)
condition 21, and Park Service recommendations by assessing their consistency with
plans applicable to the INHT as described in the Kenai Area Plan and INHT Plan and
project nexus. We also assess whether constructing and operating project infrastructure
within the planned INHT corridor is consistent with applicable land management plan
direction and the Alaska DNR easement to the Forest Service for constructing the INHT.
The compatibility of the project with the INHT has been the subject of extensive
consultation between Kenai Hydro, agencies, and interest groups and numerous comment
letters, which clearly indicate a preference to not locate project infrastructure in the
planned INHT route as identified in Alaska DNR’s 1,000-foot-wide easement. Kenai
Hydro’s proposed re-route would have sharp turns and steep changes in grade, be about
two times longer than the planned route, and would not follow a more desirable general
north to south trending direction. These attributes of Kenai Hydro’s proposed trail route
would not meet visitor expectations of having an expeditious route of travel and the
proposed route would not be consistent with the INHT Plan objectives of providing a trail
suitable for winter and summer access. Additionally, the project would incur costs for
construction, maintenance and acquiring new easements to re-route segments of the trail.
For these reasons, constructing the trail in the planned location would better align with
the intent of the INHT.
Kenai Hydro’s proposed measure to re-route the planned INHT would be
consistent with Kenai Area Plan direction to not place permanent structures or equipment
within the corridor. However, this plan guidance applies to those “structures or
equipment that could adversely affect the trail experience,” yet the plan does not describe
the intended trail experience. Alaska DNR’s easement to the Forest Service suggests a
desire for a recreation experience in an undeveloped area by stating that it reserves a
1,000-foot buffer along the corridor to conserve the wilderness characteristics of the
Iditarod trail. The planned INHT route in the vicinity of the project passes near points of
development including the Seward Highway, the community of Moose Pass and
snowmachine use as well as some off-highway vehicle use in the area is permitted.
Despite wording in the easement, the existing environment has evidence of development
that is inconsistent with a wilderness setting. The project would introduce additional
facilities into the area but considering the present level of development and motorized
vehicle use in the surrounding area and considering that facilities could be located or
screened to minimize their appearance, the incremental change in the existing appearance
would be minimal and not inconsistent with the existing condition. Because the proposed
facilities would not adversely affect the recreation experience, locating structures or
equipment within the planned INHT corridor would not conflict with the Kenai Area Plan
guidance.
Further, Alaska DNR has opined that development across and along the easement
for the INHT corridor can be allowed under certain circumstances. In 2015, Alaska DNR
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commented on a draft environmental document prepared by the U.S. Army Corps of
Engineers for Salmon Creek Section 205 Flood Risk Management Project, which
proposed constructing and upgrading trails. Alaska DNR stating:
Crossing of ADL 228890 67 could be authorized as long as the 1,000-foot
buffer is intact, the wilderness characteristics of the trail are conserved, and
conflicting uses adequately separated (letter from L. Schick, Alaska DNR,
to M. Noah, Corps, June 25, 2015).
Subsequently, on April 20, 2017, Alaska DNR issued a decision to issue
easements for constructing the U.S. Army Corps of Engineers-proposed facilities of a
gravel access road (Alaska Digital Library No. 232705) and parking area (Alaska Digital
Library No. 232706) in 2017 (Alaska DNR, 2017). With regard to the request for an
easement to locate facilities within the INHT corridor, Alaska DNR states its decision,
…considers the proposed level of development of the access road (a gravel
road approximately 12-feet wide) and its colocation with the segment of the
INHT to be appropriate for the authorized uses and a compatible use of
ADL 228890-A. In consideration of the alignment of the INHT and
1,000-foot buffer in this area, a singular crossing of ADL 228890-A by
23705 would not feasibly minimize the effect to the INHT and buffer.
Co-location of ADL-228890-A and 232705 more successfully preserves the
characteristics of the trail than aligning the access road parallel or adjacent
to the INHT by minimizing the development of lands necessary to
accommodate both authorizations.
Alaska DNR’s 2017 decision, together with our assessment that locating project
infrastructure in the planned INHT corridor would not diminish the trail experience,
indicate that it would not be necessary to re-route the planned INHT, as Kenai Hydro
proposes, to meet the Kenai Area Plan guidance.
Within the 1,000-foot-wide easement corridor for the planned INHT, it is also
necessary to assess effects on the eventual 100-foot-wide corridor where the Forest
Service would ultimately construct the INHT. Because the route passes through State of
Alaska lands and the agency’s Land and Resource Management Plan does not pertain to
non-NFS land within the forest boundary, the Land and Resource Management Plan does
not contain specific guidelines for managing the segment of the planned INHT near the
project. The Decision Notice and Finding of No Significant Impact for the Seward to
Girdwood Iditarod National Historic Trail (USDA 2004) indicates INHT segments near
67 ADL (Alaska Digital Library No.) 228890 is the easement issued to the Forest
Service for constructing the commemorative section of the INHT.
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the project would be constructed using trail class 3 68 standards which are appropriate for
lands with semi-primitive and roaded natural ROS classifications. Although either of
these classifications may be applicable to the INHT route near the project, the Chugach
LRMP shows NFS land adjacent to the Alaska DNR land, through which the easement
passes, has a semi-primitive motorized ROS classification with a moderate scenic
integrity objective.
Because examples of use, occupancy, and activities consistent with semi-primitive
motorized classification include new roads and trails, utility systems, and administrative
and permitted motorized access, constructing and operating project infrastructure near the
planned INHT route would be consistent with allowable uses on NFS lands with this
classification.
The environmental assessment for the Seward to Girdwood Iditarod National
Historic Trail (USDA 2003) states the selected route alternative is consistent with the
scenic integrity objectives contained in the Chugach Land and Resource Management
Plan but an objective is not specified for the trail route. Forest Service comments
characterizing the area as a predominantly unmodified setting of high scenic value are not
consistent with the moderate scenic integrity objective assigned to NFS lands adjacent to
the planned INHT route, which crosses Alaska DNR land. Because a moderate scenic
integrity objective refers to landscapes where the valued landscape character appears
slightly altered and noticeable deviations must remain visually subordinate to the
landscape character being viewed, constructing and operating project infrastructure near
the INHT would be consistent with this scenic integrity objective. Accordingly, project
infrastructure could be located such that it would not encroach on Forest Service rights
conveyed by the Alaska DNR easement.
Elements contained in Forest Service condition 21, such as consulting with the
Forest Service regarding design plans, providing administrative access on the project
access road, repairing project-related damage, developing a scenery management plan,
and restricting public access to project facilities are duplicative of coordination and
actions that would be undertaken to comply with Forest Service administrative
conditions, other 4(e) conditions, and standard license articles. Consequently, the level of
resource protection would likely be the same with or without implementing these
measures as part of the license.
The remaining elements of Forest Service Condition 21 pertain to additional
design and costs necessary to construct and maintain the INHT because of project
infrastructure. Although careful planning and coordination with the Forest Service would
68 Definition of this scale of trail development is: Developed/Improved; obvious
and continuous tread, typically with native materials; infrequent obstacles; trail structures
and bridges may be common; typically, semi-primitive to roaded natural setting (USDA,
2004).
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likely minimize the need to modify the design for the trail or bridge, the measure would
ensure Kenai Hydro would be responsible for the incremental costs only attributed to the
project.
Park Service 10(a) recommendation 1 recommends that Kenai Hydro engage
agencies, interested parties, and experts to evaluate other INHT route location
alternatives. Kenai Hydro believes it has adequately consulted with agencies and others
and used appropriate trail design criteria to identify the best alternative trail location.
Kenai Hydro documented its extensive consultation efforts to identify an alternative
INHT route dating back to 2010. The Park Service has not provided a basis for
concluding that its recommended consultation process differs from Kenai Hydro’s past
attempts to identify an alternative route. Additionally, the Park Service recommends that
this consultation process have an established budget and schedule and that it be subject to
Commission oversight. Implementation of the Park Service’s recommended consultation
process would be redundant because a mechanism for agency comment would already be
included in any license, and it is unclear how this consultation process would provide
additional benefit to recreation resources in the project area. Furthermore, it is not
necessary to set a schedule because Kenai Hydro has already completed an extensive
consultation process to identify its proposed alternative route for the INHT.
3.3.4.3 Cumulative Effects
Foreseeable future actions related to recreation resources include the Forest
Service’s planned construction of the commemorative segment of INHT near Grant
Creek. The planned INHT route passes near proposed project infrastructure.
Our Analysis
As discussed in the preceding section and in section 3.3.5, Aesthetic Resources,
the project infrastructure would introduce human-made features into an area where none
currently exist. Although the project would cause an incremental increase of human-
made structures, these structures would be minimal as compared to the nearby
development of community of Moose Pass, Seward Highway, and Alaska Railroad. The
project road, transmission line, powerhouse, and other infrastructure would be located
and screened to minimize their visibility, but they would still likely be seen by visitors.
The presence of the project infrastructure near the planned INHT route would have a
minimal cumulative effect on recreation resources because visitors would notice the
additional constructed features, but this would not be inconsistent with any applicable
planning guidelines.
Land Use
Kenai Hydro proposes to construct project infrastructure on State of Alaska land
and cross the ROWs for the ARRC railway and Seward Highway. Project operation
would use Grant Lake, located on federal land managed by the Forest Service, Chugach
National Forest.
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Kenai Hydro’s proposed measures include:
• obtaining the necessary rights from Alaska DNR, Forest Service, and
ARRC to construct and operate the project;
• developing and implementing an ESCP, hazardous materials
containment/fuel storage plan, and spill prevention, control and
containment plan and fire prevention plan;
• adhering to BMPs during construction;
• developing and implementing an INHT re-route plan; and
• restricting public access by signing and gating/fencing the project access
road near Seward Highway.
Forest Service final 4(e) condition 19 would require Kenai Hydro to develop and
implement several plans. We assume the scope of Kenai Hydro’s proposed plans would
be similar to plans the Forest Service would require for an ESCP and fire prevention plan.
The Forest Service final 4(e) condition would also require Kenai Hydro develop a
construction plan. We analyze the effects of these measures relative to the project
boundary, applicable land management objectives and guidance, and public access.
Project Boundary
Kenai Hydro proposes a project boundary that would follow a contour of 703 feet
around Grant Lake and encompass all generation and transmission facilities and the
access roads to the powerhouse and intake.
Our Analysis
In accordance with Commission regulations, the project boundary must enclose all
principal project works and lands necessary for O&M of the project and other project
purposes, such as recreation, shoreline control, or protection of environmental resources
(18 CFR § 4.51). The proposed boundary location around Grant Lake would encompass
land up to the maximum water surface elevation of the lake but it would not provide a
shoreline buffer. Because the surrounding land is NFS land, a buffer would not be
necessary to maintain public shoreline access. The proposed approximate 20-foot buffers
around the project infrastructure, detention pond, lay down/parking areas and along the
corridors for the access roads and transmission line would provide sufficient area for
operating and maintaining the project infrastructure, encompass land potentially affected
by the project, and is consistent with the Commission’s guidance that the project
boundary not extend more than 200 feet from project infrastructure. Kenai Hydro
appropriately proposes to acquire rights from the affected landowners to construct and
operate the project, as required by Commission regulations.
The transmission line and the access road would cross and intersect, respectively,
the Seward Highway Scenic Byway in an area classified as a Corridor Development Area
in the Kenai Area Plan. Kenai Hydro states the proposed project access road intersection
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would be about 100 yards from an existing driveway that accesses private land. At this
distance, the location of the intersection would not be consistent with the guideline for
allowing reasonable access from the highway to private or public lands on either side of
the highway with such access points occurring at no closer than 500-foot intervals. The
visual simulation (see figure 3-39 in Aesthetic Resources) shows a pull-out across from
the access road intersection but it does not show the private driveway. During the
planning and design phase of the project, Kenai Hydro should consider alternative
locations for the access road to achieve the minimum distance interval. The transmission
line corridor would also be consistent with the guidelines which allow utility lines to
directly cross the scenic buffer.
Land and Resource Management
The proposed project would modify the landscape, increase the ease of public
access to the area, and introduce periodic operating and maintenance activities in an
undeveloped area of state and federally owned lands near the Seward Highway and
Alaska Railroad.
Our Analysis
The ESCP, hazardous materials containment/fuel storage plan, and spill
prevention, control and containment plan Kenai Hydro proposes, and as final 4(e)
condition 19 would require, would minimize potential project effects of erosion,
pollution, and wildland fire that could affect resources within and adjacent to the project
boundary. Adhering to BMPs, as Kenai Hydro proposes, would also have these effects.
Developing the plans in consultation with the Forest Service and Alaska DNR would
ensure that plan content is consistent with agency land management direction and agency
concerns are addressed.
Forest Service final 4(e) condition 19 would require Kenai Hydro develop a
construction plan. Although the agency does not describe the intended plan’s content, it
is likely Kenai Hydro’s iterative proposed process for preparing and securing agency
design approval would provide sufficient information about project construction.
However, a separate plan that synthesizes schedule, construction locations and activities,
and access restrictions would allow the Forest Service to determine whether any
conflicting uses may occur. Developing this plan in consultation with the Forest Service
would also allow the agency to review the adequacy of measures Kenai Hydro would
implement to limit public access during construction. Implementing this plan would
provide for public safety during construction by identifying locations when and where
public use should be excluded and ensure the Forest Service has adequate information to
continue managing public use of the NFS lands.
Although Kenai Hydro’s proposal to re-route the planned INHT would meet the
guidance and objectives of the Kenai Area Plan, this measure would not be necessary to
achieve consistency with the plan or avoid infringing on the rights conveyed to the Forest
Service for constructing a commemorative route for the INHT on State of Alaska land.
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Analysis of the project relative to the INHT is provided in the environmental effects
section of recreation resources.
Public Access
The project access road would create an additional cleared route of access to Grant
Lake which could attract off-highway vehicle use and increase visitor use at Grant Lake.
Kenai Hydro proposes to gate and fence the access road to only allow access for
operating and maintaining the project.
Our Analysis
Suitable uses for land in the affected management units of State of Alaska lands
include recreation uses, hunting, fishing or boating access sites, trail corridors, or
greenbelts along bodies of water or roadways (Alaska DNR, 2001). This scope of
intended uses indicates the project should include measures that support recreational
access. Kenai Hydro’s proposal to gate and fence the access road does not appear
consistent with this intent; however, this measure responds to concerns about
unauthorized off-highway vehicle use on the access road and adjacent land which has
potential effects such as erosion, vegetation damage, pollution, and noise. Non-
motorized use on the access road would have minimal, if any, effects and would be
consistent with the intent to manage these lands, as expressed in the Kenai Area Plan, for
recreation uses. Non-motorized uses of the access road would also not impede Kenai
Hydro’s access for project O&M. The access road would provide an additional route for
visitors to access Grant Lake, thereby improving recreational access for dispersed
recreation opportunities and potentially increasing use and sanitation needs. If non-
motorized access were allowed, concerns about public safety associated with parking
along Seward Highway or the ARRC railway could be addressed by installing the
proposed gate at a distance from these ROWs and providing a parking area with a single-
unit vault restroom near the gate. Accordingly, allowing year-round non-motorized use
of the road for access to Grant Lake and constructing a parking area to support this use
would provide recreation benefits for project visitors.
3.3.5 Aesthetic Resources
3.3.5.1 Affected Environment
The area where the project is located is a highly distinctive, highly visible, and
highly valued area of the Kenai Peninsula. The area near the project is characterized by
mountains with serrated ridgelines, waterbodies with turquoise waters, and clear streams
that provide marked contrast with the colors and patterns of the forest (figure 3-30).
Vegetation consists primarily of a mixed deciduous/coniferous forest that leads to high
altitude and colorful alpine vegetation that contrasts with geological features and scree
slopes. The community of Moose Pass is a distinctive, small, nearby community with a
low level of development that is in keeping with the landscape. Driveways leading to the
few residences near Moose Pass adjoin the Seward Highway near the project.
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Note: Upper and Lower Trail Lakes (Unit 1) in the foreground and Kenai Lake in the
distance at the top of the photograph. Grant Lake is to the left and out of view.
Figure 3-30. View of the project area, looking south (Source: Kenai Hydro, 2018a, as
modified by staff).
Views of the area are limited to those using the Seward Highway and Alaska
Railroad; residents of Moose Pass; and those who travel by snowmachine, skis, and
snowshoes and on foot or horseback. Residents, recreationists, and aircraft passengers
are the primary viewers of the project area. The project area can be viewed from all
distance zones; however, the topography of the area limits distance zones to the
foreground for most viewers. Kenai Hydro established three landscape units to evaluate
aesthetic resources for the project (figure 3-31)—Trails Lake Valley (Unit 1), Grant Lake
West (Unit 2), and Grant Lake East (Unit 3). All three units have distinctive landscapes 69
with a high level of scenic integrity that is mainly undisturbed. The only evidence of
69 Areas where landforms, vegetative patterns, water characteristics, and cultural
features combine to provide unusual, unique, or outstanding scenic quality. These
landscapes have strong positive attributes of variety, unity, vividness, mystery, intactness,
order, harmony, uniqueness, pattern, and balance.
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human presence is associated with the Seward Highway and the ARRC corridor,
including the community of Moose Pass. Although these elements provide evidence of
human presence, the roadway, railway, and the community of Moose Pass are within
scale and context of the setting.
Figure 3-31. Landscape units for analyzing aesthetic resources (Source: Kenai
Hydro, 2018a, as modified by staff).
Except for the land at the east end of Grant Lake, NFS lands adjacent to the
project have a moderate scenic integrity objective that refers to landscapes where the
valued landscape character appears slightly altered and noticeable deviations must remain
visually subordinate to the landscape character being viewed. The land at the east end of
Grant Lake has a high scenic integrity object that refers to landscapes where the valued
landscape character is intact with only minute, if any, deviations, and the existing
landscape character and sense of place is expressed at the highest possible level (figure
3-32).
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Figure 3-32. Scenic integrity objectives for National Forest System land in the vicinity of the project
(Source: Databasin, 2018).
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3.3.5.2 Environmental Effects
Kenai Hydro would construct buildings and other infrastructure and equipment on
land with no existing development, except for the roads and buildings located along
Seward Highway. The access road would intersect and the transmission line would cross
the Seward Highway. The project would construct an intake extending above the surface
of Grant Lake and fluctuate the water level in the lake. O&M would require periodic
vehicular access in the area.
Kenai Hydro proposes to design the project to provide separation between project
facilities and Grant Creek, using colors and textures that are complementary to the
landscape. Kenai Hydro would stage construction so that equipment was kept onsite and
schedule most work to occur during the summer. Kenai Hydro also proposes to re-route
the INHT away from the project.
The Park Service recommends screening, to the extent possible, all project
facilities, including the roads, buildings, transmission lines, detention pond, and staging
areas, using existing and created landforms and vegetation, and building exterior paint
colors that blend with the landscape. The agency also recommends using directional
security lights only in the immediate vicinity of project facilities using the lowest
effective illumination and temperatures.
Forest Service final 4(e) condition 19 requires Kenai Hydro develop a scenery
management plan.
Construction
The project would be constructed during an 18-month period when Kenai Hydro
would remove vegetation; grade soil; and construct the access roads, bridge, and project
infrastructure.
Our Analysis
Construction would increase traffic and noise, especially during access road
construction and as construction vehicles arrive and leave the project at the intersection
of the access road and the Seward Highway. Increased traffic may affect Seward
Highway travelers in terms of congestion and possible delays. Construction noise would
quickly dissipate with distance from construction activities because of topography and
vegetation resulting in minimal additional noise in the area. Kenai Hydro’s proposal to
stage equipment away from key viewpoints would limit views of construction equipment.
The few visitors who attempt the difficult access around Grant Lake and flightseers may
view construction activity, the coffer dam, laydown areas, and staged materials located at
the southwest shore of Grant Lake during the construction period. Scheduling
construction during the summer, as Kenai Hydro proposes, would minimize the need for
lighting work sites, which would minimize the effects of stray lighting in the area. These
effects would be minimal considering their localized nature, they would only occur
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during two summer seasons, and a low number of potentially affected residents, highway
users, and recreationists would be affected.
Operation and Maintenance
Maintenance Access
After construction, Kenai Hydro would need vehicular access to all project
infrastructure to inspect and maintain the facilities throughout the term of the license.
Our Analysis
Views of vehicles and personnel associated with monthly maintenance activities at
the powerhouse, penstock, detention pond, and intake would have minor effects on visual
resources. Except for winter snowmachine use, which is allowed on Alaska DNR-
managed lands where the road would be located, Kenai Hydro would prohibit motorized
vehicle access, which would limit viewers in the area. INHT users would occasionally
notice vehicles using the access road where the INHT, as planned or proposed to be re-
routed, would cross the access road. INHT users would also occasionally notice
vegetation removal and trimming to maintain the transmission line corridor. Crossing the
INHT, as planned or re-routed, at a right angle would minimize the extent of these short-
duration effects.
Seward Highway travelers would view vegetation removal and trimming
associated with maintaining the transmission line and access road. These activities and
resulting view of an unvegetated corridor through the forest canopy would appear similar
to existing activities to operate and maintain utility corridors and driveways near Moose
Pass. Although the cleared corridor would be visible year-round, active maintenance
activity would probably only occur, at most, every year or two and last for only few days.
At highway speed, travelers would only briefly view the corridor and associated
maintenance activities on the order of seconds. Because similar maintenance activities
are not uncommon in the area and would have a short duration, the incremental increase
would be hardly noticeable to Seward Highway travelers.
Water Surface Fluctuation
The project would draw water from Grant Lake for power generation, resulting in
lower reservoir elevations during late fall, winter and spring, as compared to exiting
conditions.
Our Analysis
Currently, Grant Lake fluctuates about 6 to 8 feet over the course of a year and
may fluctuate as much as 11 feet. The project may cause Grant Lake to fluctuate up to
about 13 feet. Project operation would expose a greater swath of unvegetated shoreline
than currently exists. The additional 5 to 7 vertical feet (approximate) of shoreline
exposed from the drawdown would probably be unnoticeable because it would typically
occur from fall through late winter when snow typically covers the ground (figure 3-33).
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Even if the shoreline is not snow-covered, the view of the shoreline is eclipsed by views
of the adjacent landscape (figures 3-34 through 3-38), so the additional exposed shoreline
would not appear different from what currently exists. Flightseers over Grant Lake
would likely be too far above the project to detect the small difference in water surface
fluctuation.
Although Kenai Hydro proposes measures that would address most concerns about
visual resources, if Kenai Hydro were to develop and implement a scenery management
plan, as specified in Forest Service final 4(e) condition 19, concerns about constructing
and operating the project in a way that minimizes effects on visual resources would be
addressed. Developing this plan in coordination with the Forest Service, Alaska DNR,
and the Park Service would ensure visual resources are adequately protected on state and
federal land associated with the project by specifying processes for agency coordination
for maintenance activities and monitoring over the license term. Incorporating the Park
Service’s recommendation for security lighting in a scenery management plan would
have an additional effect of limiting stray lighting in the area.
Project Access Road and Infrastructure
The project would introduce constructed features (i.e., access road, transmission
line, powerhouse, penstock, detention pond, and intake tower) to an existing landscape
that has a natural appearance.
Project Access Road and Transmission Line
The powerhouse access road would be a 24-foot-wide, two-lane, gravel surfaced
road about 1 mile long. The road would cross Trail Lake Narrows with a new, single-
span bridge. The 1.1-mile-long, 115-kV transmission line would be mostly co-located
within the access road corridor, which would be about 150-feet wide. Kenai Hydro
would use Douglas fir wood poles, or other type approved and rated for the application,
spaced about 250-feet apart to support the 1.1-mile, three-phase, 115-kV transmission
line. Kenai Hydro would mount the conductors on horizontal supports and mount a static
line with an embedded fiber optic cable above the conductors. The poles would be about
59-feet tall, and conductors would have a minimum 30-foot ground clearance. The
access road extending from the powerhouse access road about 0.9 mile to the intake
would be 16-feet wide, single-lane, and have a graveled surface; the corridor would be
100-feet wide.
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Figure 3-33. Simulations showing changes in water surface elevations associated with the project operation in from
October through April (Source: Kenai Hydro, 2017a, as modified by staff).
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Figure 3-34. Simulations showing changes in water surface elevations associated with the project operation in May
(Source: Kenai Hydro, 2017a, as modified by staff).
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Figure 3-35. Simulations showing changes in water surface elevations associated with the project operation in June
(Source: Kenai Hydro, 2017a, as modified by staff).
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Figure 3-36. Simulations showing changes in water surface elevations associated with the project operation in July
(Source: Kenai Hydro, 2017a, as modified by staff).
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Figure 3-37. Simulations showing changes in water surface elevations associated with the project operation in August
(Source: Kenai Hydro, 2017a, as modified by staff).
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Figure 3-38. Simulations showing changes in water surface elevations associated with the project operation in September
(Source: Kenai Hydro, 2017a, as modified by staff).
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Our Analysis
The powerhouse access road and transmission line would create a linear corridor
void of tall forest vegetation through the 150-foot scenic buffer along the Seward
Highway; other project infrastructure would not be visible from the Seward Highway
(figure 3-39). The changed appearance would be mostly unnoticed by Seward Highway
travelers because the corridors would be similar to areas cleared for other driveways
intersecting the highway; most visitors drive past the proposed corridors at about 50
miles per hour generating a view that lasts from about 4 to 15 seconds. Locating the
transmission line to cross and the access road to intersect the Seward Highway at right
angles, as Kenai Hydro proposes, would reduce the extent of this minimal effect.
Figure 3-39. Existing view (left) and visual simulation (right) of the proposed project
access road intersecting the Seward Highway (Source: Kenai Hydro,
2018a, as modified by staff).
Future visitors to the area would also encounter the 150-foot-wide access road and
transmission line corridor at the proposed re-routed INHT crossing (figure 3-40). This
corridor would present a foreground view that contrasts with the surrounding closed
forest canopy; however, topography and dense, tall vegetation adjacent to the corridor
would limit the distance at which the road and transmission line would be visible. The
taller vegetation adjacent to the corridor would obscure middleground and background
views of the corridor except as viewed from the air. The appearance of the access road
and transmission line would be somewhat similar to other constructed elements such as
the INHT Bridge or nearby existing features of the Seward Highway, railway, and
community of Moose Pass. Constructing the access road corridor to cross the re-routed
INHT at a right angle, as Kenai Hydro proposes, would minimize the effect of this
contrasting view. Although the project would alter foreground views of landscape, the
Alaska DNR-managed lands at this location are not specifically managed for their scenic
value, and the development would have an appearance that is consistent with the intended
management.
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Figure 3-40. Existing view (left) and visual simulation (right) of the proposed project
access road crossing the proposed re-route of the INHT (Source: Kenai
Hydro, 2018a, as modified by staff).
These same visual effects associated with the access road and transmission line
corridor would occur if the INHT were constructed in the planned corridor and would
occur about 0.25 mile east of where the proposed re-routed INHT would cross the access
road. Additional visual effects at the planned INHT route could be caused by project
infrastructure located near the trail. Kenai Hydro’s visual simulations show the project
features would be mostly screened by topography and the dense forest canopy and
vegetative cover in the area (figures 3-41 through 3-43).70 Implementing Kenai Hydro’s
proposal to design and blend infrastructure with the surrounding area using appropriate
colors and textures would further minimize project appearance. Additionally, insulating
the powerhouse, as proposed, would limit the extent of noise to the area immediately near
the powerhouse. Forest cover and topography would quickly absorb any noise audible
from the powerhouse. Kenai Hydro’s infrastructure design together with carefully
locating the trail within the easement corridor would provide a visual and sound buffer
between the INHT and adjacent project infrastructure and operation.
70 Despite the lack of consideration in the visual simulations for necessary
vegetation clearance for proper maintenance near infrastructure, we expect the
infrastructure would still be sufficiently screened. We expect these views would still
only slightly alter foreground views and infrastructure would not have an appearance that
is inconsistent with the existing management goals.
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Figure 3-41. Visual simulation of the proposed project access road crossing (lower right
corner) the planned INHT route (Source: Kenai Hydro, 2017a, as modified
by staff).
Figure 3-42. Visual simulation of the proposed powerhouse from planned INHT route
(view looking west from the planned INHT route) (Source: Kenai Hydro,
2017a, as modified by staff).
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Figure 3-43. Visual simulation of the proposed powerhouse (on right side of figure)
from planned INHT route (view looking south toward the planned trail
bridge crossing Grant Creek) (Source: Kenai Hydro, 2017a, as modified by
staff).
Visitors to the project area would likely have screened or partial views of project
infrastructure and facilities. Although the project would alter foreground views of
landscape, Alaska DNR does not specifically manage lands at this location for their
scenic value and the development would not have an appearance that is inconsistent with
the existing management goals.
Visitors using the intake access road to travel to Grant Lake would also see the
intake tower extending about 8 to 20 feet above the water surface. Viewing project
infrastructure may contrast with an expectation of viewing an undeveloped landscape
near Grant Lake. However, this changed appearance would be consistent with designated
moderate scenic integrity objective, applicable to NFS lands from which visitors could
view the project, because the view of the intake tower would only slightly alter the
landscape and would be visually subordinate to the landscape character being viewed.
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3.3.6 Cultural Resources
3.3.6.1 Affected Environment
Section 106 of the National Historic Preservation Act
Section 106 of the NHPA as amended and its implementing regulations found at
36 CFR 800 require the Commission, as lead federal agency, and the cooperating
agencies to consider the effect of their undertakings on any historic properties and allow
the Advisory Council on Historic Preservation (Advisory Council) an opportunity to
comment.
Historic properties are defined as any district, site, building, structure, or object
that is included in or eligible for inclusion in the National Register. In this document, the
term “cultural resources” is used to include properties that have not been evaluated for
eligibility for listing in the National Register. Historic properties generally must possess
integrity of location, design, setting, materials, workmanship, feeling, and association,
and must meet one or more of the criteria specified in 36 CFR 60.4. For example,
dilapidated structures or heavily disturbed archaeological sites may not have enough
contextual integrity to be considered eligible. TCPs are a type of historic property
eligible for the National Register because of their association with cultural practices or
beliefs of a living community that: (1) are rooted in that community’s history, or (2) are
important in maintaining the continuing cultural identity of the community (Parker and
King, 1998). In most cases, cultural resources less than 50 years old are not considered
eligible for the National Register. However, properties that are less than 50 years old
may be considered eligible for listing in the National Register if they have achieved
significance within the past 50 years and are of exceptional importance or if they are a
contributing part of a National Register-eligible district.
Section 106 also requires that the Commission seek concurrence with the Alaska
SHPO on any finding involving effects or no effects on historic properties and allow the
Advisory Council an opportunity to comment. If Native organizations’ properties have
been identified, section 106 also requires that the Commission consult with interested
Native organization tribes that might attach religious or cultural significance to such
properties (i.e., TCPs).
Kenai Hydro provided the Commission with cultural resources information,
analyses, and recommendations, in accordance with the Advisory Council’s regulations
for implementing section 106 at 36 CFR 800.2(a)(3) and the Commission’s regulation at
18 CFR 380(f). The federal land managing agencies have obligations regarding cultural
resources under other federal laws and regulations, including the Federal Land Policy and
Management Act, the Antiquities Act of 1906, section 110 of the NHPA, the
Archaeological and Historic Preservation Act of 1974, the Archaeological Resources
Protection Act of 1970, and the Native American Graves Protection and Repatriation Act.
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Construction, maintenance, and operation of the proposed project could adversely
affect historic properties (i.e., cultural resources listed or eligible for listing in the
National Register). These historic properties could include prehistoric or historic
archaeological sites, districts, buildings, structures, and objects, as well as locations of
traditional value to Native organizations. Direct effects could include destruction or
damage to all, or a portion, of a historic property. Indirect effects could include the
introduction of visual, atmospheric, or audible elements that affect the setting or character
of a historic property.
If existing or potential adverse effects on historic properties are identified at the
proposed project, Kenai Hydro must develop an HPMP that provides measures to avoid,
reduce, or mitigate the effects. During development of the HPMP, Kenai Hydro should
consult with the Commission, Advisory Council, Alaska SHPO, Bureau of Land
Management, and Native organizations to obtain their views on the management of
historic properties. In most cases, the HPMP would be implemented by execution of a
PA that would be signed by the Commission, the Advisory Council (if it chooses to
participate), the Alaska SHPO, the Forest Service, and other consulting parties as
appropriate.
On August 14, 2009, the Commission sent letters initiating consultation with
federally recognized Native American tribes and tribal organizations who are indigenous
to the area near the proposed project. Nine tribal organizations received letters from the
Commission—the Native Village of Eklutna, Ninilchik Traditional Council, Kenaitze
Indian Tribe, Salamat of Native Association, Inc., Kenai Natives Association, Inc., Cook
Inlet Region, Inc., Chugach Alaska Corporation, Chenega Corporation, and Qutekcak
Native Tribe. These letters asked about the organizations’ interest in the proposed project
and invited the tribes to meet with Commission staff to discuss their participation. No
responses were received.
In its September 16, 2009, Notice of Intent to File License Application, Filing of
Pre-application Document, and Approving Use of the Traditional Licensing Process, the
Commission designated Kenai Hydro as the Commission’s non-federal representative for
carrying out day-to-day consultation with regard to the project pursuant to section 106 of
the NHPA; however, the Commission remains ultimately responsible for all findings and
determinations regarding the effects of the project on any historic property. Kenai Hydro
also established a cultural resources working group for the proposed project that included
eight of the nine tribal organizations identified above and the Forest Service, Alaska
SHPO, City of Seward, Resurrection Bay Conservation Alliance, and the Commission.
Working group meetings were held on June 24, 2010, April 3, 2013, and March 21, 2014.
A Cultural Resources Working Group site visit was also conducted on July 15, 2015, to
review a possible route for the commemorative INHT. Additionally, by letter filed on
June 4, 2014, Commission staff included Mr. Mark Luttrell as a cultural resources
consulting party for the project (letter from T. Konnert, Chief, West Branch Division of
Hydropower Licensing, FERC, Washington D.C., to M. Luttrell, Seward, AK, June 4,
2014).
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Kenai Hydro provided the Commission with documentation of regular
consultation with group participants regarding study status, results, and the development
of the HPMP for the project.
Area of Potential Effects
Pursuant to section 106, the Commission must take into account whether any
historic property within a project’s APE could be affected by the issuance of an original
license. The APE is determined in consultation with the Alaska SHPO and is defined as
“the geographic area or areas within which an undertaking may cause changes in the
character or use of historic properties,” including TCPs (36 CFR 800.16[d]).
In its application, Kenai Hydro defines the APE for the proposed project as:
an area 100 feet beyond the perimeter of all Project features, such as the
location that would be impacted by powerhouse construction, areas
along Grant Creek that may experience increased use, and corridors for
road access and transmission line alignments. The proposed APE also
includes an area around Grant Lake extending from the current
waterline to 30 feet above the proposed maximum lake elevation, or up
to 733 feet NAVD 88. Possible archaeological resources that could
currently be under water, but may be exposed in the future due to
drawdown or decreased lake level, would be addressed in an HPMP.
The APE was expanded in 2014 to include a proposed re-alignment for
the planned INHT. The APE considered for traditional cultural
properties (TCPs) was larger than the APE for archaeological and
historical sites. As such it included the general project area surrounding
Grant Lake and Grant Creek, Upper and Lower Trail Lakes, and the
Seward Highway corridor around Moose Pass.
In its amended final license application, Kenai Hydro states that the Alaska SHPO
concurred with the definition of the APE in a March 11, 2015, letter. This letter has not
been filed with the Commission.
Cultural History Overview
Archival research conducted by Kenai Hydro provided background information
relevant to understanding prehistoric, ethnographic, and historic lifeways within and
adjacent to the project area. This information is summarized below (as provided in Meitl
et al., 2015).
Prehistoric and Ethnographic Context
The earliest known archaeological sites documented near proposed project were
recorded along the upper Kenai River at Beluga Point. Artifacts recovered from these
sites reflect core and blade technology characteristic of the early Holocene. Other
artifacts recovered in this area date to between 4,500 and 3,500 years before present.
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These two early occupations are separated by a distinct time gap, but people known as the
“Riverine Kachemak” (also known as Pacific Eskimos) exploited the salmon fishery in
the interior of the Kenai Peninsula and along the Susitna River between 3,000 and 1,000
before present. Sites dating to about 1,850 to 1,750 before present that contain semi-
subterranean house depressions associated with the Riverine Kachemak have been
documented. It is believed that these people were related to groups residing in the
vicinity of Cook Inlet and were also connected to people in the Bristol Bay area.
The ethnographic Dena’ina displaced the Kachemak about 1,000 years ago.
Archaeological evidence of these people is found along the banks of the Kenai River and
throughout the region. Like the Kachemak, the Dena’ina relied on salmon, but they also
hunted beluga whales and seals and large terrestrial game such as moose, caribou,
mountain sheep and goats, and bears. Birds taken included grouse, ducks, ptarmigan,
eagles, and owls. Other dietary staples consisted of eggs, berries, roots, and seaweed.
Dena’ina residential structures were similar to those of the Kachemak. Winter houses
were semi-subterranean, rectangular, and were constructed of logs with a roof of sod,
moss, and earth. Rooms within the house included a bathhouse and sleeping rooms.
Structures occupied during the warmer summer months were less formative, consisting of
poles lashed together and roofed with skins. These were also used as smoke houses to
dry fish. Temporary structures and lean-tos were similar to the summer houses. Food
caches consisted of elevated houses and moss-lined pits used to store fish. While the last
traditional Dena’ina village appears to have been abandoned by 1905, some Dena’ina
continued to live in houses along the Kenai River in 1910.
Historic Context
The earliest-known exploration of lands near the proposed project were conducted
between 1848 and 1850 by Petr Doroshin, a Russian gold mining engineer. However,
because of difficulties transporting materials, Doroshin’s interest in mining in the interior
of the Kenai Peninsula diminished. After the state of Alaska was sold to the United
States, American trappers frequently crossed the peninsula, but it was further exploration
for gold that resulted in increased settlement of the region. While several groups and
individuals sought gold with limited success along the Kenai River in 1869 and 1870,
like Doroshin, they too found these endeavors difficult to finance. Joseph M. Cooper was
one such prospector, and he established a trading post in the early 1880s at what is now
known as Cooper Landing. The first mining claims in the upper Kenai River area were
filed in 1895. Other claims were filed in 1896 and 1897. In 1898, a hydraulic plant was
established on Cooper Creek and another on Kenai Lake. The most profitable claims
were along Cooper and Stetson Creeks although prospecting continued on the Kenai
River. After the discovery of gold in the Klondike, many miners left the Cook Inlet and
Kenai River area. However, trouble reaching the Klondike resulted in the return of many
of these miners. Between 1900 and 1941, and after the main gold rush, a number of
claims were filed at Grant Lake. J.F. Case and E.E. Whitney established the original
Case Mine in 1911. Case Mine activity occurred at various locations along the northern
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shore of the lake, and production at the mine was reported until 1949. Al Solars
established several four quartz claims (the Solars prospect) on the southern shore of Lake
Grant. However, no development or production was reported for the claims. For the
most part, mining in Alaska ended in 1942 when the World War II War Production Board
closed all mines that employed more than five men. When the closure ended in 1945,
mining costs were high, and the price of gold was low; however, Case Mine remained in
operation. Two of the claims worked by Case were owned by the Grant Lake Mining
Company. In 1983, it was reported that Grant Lake Mine was one of the largest gold
producers on the Kenai Peninsula and that Case Mine also saw success. This mine
remains in production and is operated by White Rock Mining.
Trails in the Kenai River area that were established by the Dena’ina were later
used by both Russian and American explorers. During the gold rush, these trails were not
sufficient to carry miners, materials, and mail, and by 1902, the Alaska Central Railroad
surveyed a route for a railroad. Construction began in 1904, and the town of Seward was
established as the end of the train route. By 1907, the rail system extended 52 miles. In
1909, the project was reorganized under a new company, the Alaska Northern Railway.
Only 20 additional miles to Kern Creek had been constructed when the Alaska Northern
Railway went bankrupt in 1910. In 1912, Congress established the Alaska Railway
Commission. The Commission recommended that a government railroad be constructed
from Kern Creek to Kuskokwim Valley. The Alaska Railway Act was passed in 1914,
and a route for the railway between Seward and Anchorage was surveyed and
constructed.
The Alaska Road Commission was created in 1905, and in 1908, the Seward to
Nome Mail Trail was constructed. This trail, later called the Iditarod Trail, connected
settlements, trading posts, and mines. A wagon road was also constructed between Moos
Pass and Johnson Pass. Following the establishment of the Chugach National Forest in
1909, the Forest Service and the Alaska Road Commission shared responsibility for
many of the roads until 1920 when Alaska became a state. The Bureau of Public Roads
then managed the roads. The Seward Highway was constructed between 1948 and 1951
and was paved in 1954.
Cultural Resources Studies
To determine the extent of previous studies and to identify previously recorded
cultural resource sites in the study area, Kenai Hydro reviewed existing Alaska Heritage
Resources Survey (AHRS) and Forest Service records. Additional information was also
sought from individuals who could have knowledge of historic properties near the
proposed project. The record search indicated that nine cultural resource sites had been
previously recorded within the project APE. These resources include a portion of the
Alaska Railroad (SEW-00029), three trails (Seward-Moose Pass Trail [SEW-00285],
Grant Lake Trail [SEW-01455]), Grant Lake Road [SEW-01454]), Solars Sawmill
(SEW-00285), Case Mine (SEW-00659), two cabins (SEW-00768, SEW-00823), and a
Grant Lake dock site (SEW-01144).
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Following completion of the record searches, Kenai Hydro conducted intensive
archaeological field surveys within the project APE between 2013 and 2014. Sensitive
areas within the APE were identified using criteria provided in a Forest Service
sensitivity model outlined within an appendix to a Forest Service PA (Chugach National
Forest, 2002). These criteria include, but are not limited to, an area’s proximity to trails,
mines, and water bodies, degree of slope, and vegetation type. Most of the project APE
was determined to be of high potential for the presence of cultural resources. The
purpose of the surveys was to document new, unrecorded archaeological resources and,
where necessary, to evaluate the National Register eligibility of previously recorded
resources. The field surveys consisted of a team of archaeologists walking parallel
transects within the APE and conducting intuitive subsurface testing to identify the
presence or absence of subsurface archaeological deposits and/or features.
The potential National Register eligibility of each identified cultural resource site
was based on the criteria specified in 36 CFR 800.4 and the guidance provided in
National Register Bulletin 15 (Park Service, 1997) and National Register Bulletin 36
(Park Service, 1993). These criteria are:
• Criterion A. Association with events that have made a significant
contribution to the broad patterns of our history;
• Criterion B. Association with the lives of persons significant in our past;
• Criterion C. [Resources] that embody the distinctive characteristics of a
type, period, method of construction, or that represent the work of a master,
or that possess high artistic values, or that represent a significant and
distinguishable entity whose components may lack individual distinction;
or
• Criterion D. [Resources] that have yielded or may be likely to yield,
information important in prehistory or history.
The research potential of each site was also assessed based on site condition,
integrity, location, and other factors.
In its Cultural Resources Study Plan, Kenai Hydro also indicated that a
Subsistence and Cultural Use Study would be implemented to address potential TCPs that
could be affected by the proposed project. This study would be coordinated with other
resource studies and would require consultation with identified tribal organizations and
agencies. Potential project-related effects on identified areas would also be assessed.
Results of Cultural Resource Studies
The results of the cultural resources studies were presented in Grant Lake
Hydroelectric Project (FERC No. 13212) Cultural Resources Study Final Report (Meitl
et al., 2015) filed with the Commission on February 24, 2015. During the survey, 57
locations containing evidence of human activity were recorded. However, only 24 of
these locations (including the 9 previously recorded locations) were considered to be
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potential historic properties, assigned AHRS numbers, and evaluated for their National
Register eligibility. Eight of the 24 sites were determined to be eligible for listing in the
National Register (including 1 historic district and 3 sites that contribute to the district’s
eligibility), 15 sites were determined to be ineligible for listing on the National Register,
and 1 site remains unevaluated. Additionally, while the INHT, which is eligible for
listing on the National Register, passes near the project APE, it is not located within the
APE itself. However, when constructed, a portion of the commemorative INHT would
be located in the APE. This new commemorative portion of the INHT has been
determined to be ineligible for listing on the National Register. Table 3-30 summarizes
all resources within the APE, including the pending commemorative INHT. No potential
TCPs were identified during the cultural resources study.
Table 3-30. Eligible cultural resources within the project APE (Source: Kenai Hydro,
2018a).
AHRS Number Site Description National Register Eligibility
SEW-00029 Alaska Railroad Eligible (criterion A)
SEW-00148 Seward-Moose Pass Trail Eligible; nominated
SEW-00285 Solars Sawmill Eligible (criterion D)
SEW-00659
Case Mine District (includes
Case Mine Camp, Lakeside
Trail, mill site, mine workings)
Eligible (criteria A and D)
SEW-00768 Grant Lake cabin Ineligible
SEW-00822 Grant Lake Prospect Ineligible
SEW-00823 North Grant Lake Cabin Eligible as contributing to
Case Mine District
SEW-01144 Dock site at Grant Lake Ineligible
SEW-01454 Grant Lake Road to Case Mine Eligible as contributing to
Case Mine District
SEW-01455 Grant Lake Trail Eligible (criterion A)
SEW-01515 Trail Ineligible
SEW-01516 Trail Ineligible
SEW-01517 Four depressions Ineligible
SEW-01518 Wire cables Ineligible
SEW-01519 Prospect pit Ineligible
SEW-01520 Cable crossing on Grant Creek Ineligible
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AHRS Number Site Description National Register Eligibility
SEW-01521 Sawmill-Upper Trail Lake Trail Undetermined (additional
information needed)
SEW-01522 Case Mine prospect pits Eligible as contributing to
Case Mine District
SEW-01523 Prospect pit Ineligible
SEW-01524 Five depressions Ineligible
SEW-01525 Depression Ineligible
SEW-01526 Depression Ineligible
SEW-01527 Scatter of historic artifacts Ineligible
SEW-01528 Pulley and cable Ineligible
-- Commemorative INHT
(unconstructed)
Ineligible
The Case Mine District (SEW-00659) consists of several discrete activity areas
that include a mill site, camp area, the Lakeside Trail (tractor shed area), mine workings,
and other areas. Three additional elements include Grant Lake Road to Case Mine
(SEW-01454), the Case Mine prospect pits (SEW-01522), and the North Grant Lake
Cabin (SEW-00823, also known as the Case Mine Dynamite Shack). These three
resources are associated with the mine and contribute to the Case Mine District, but are
distinct from the mine itself and therefore received individual AHRS numbers.
The National Register status of the Sawmill-Upper Trail Lake Trail (SEW-01521)
remains unknown. Only the eastern end of the trail is located within the project APE, and
this area was not accessible during field surveys because of erosion and fallen trees. For
this reason, the trail’s National Register eligibility could not be assessed.
In a letter filed on April 18, 2016, the Alaska SHPO concurred with Kenai
Hydro’s National Register evaluations of resources documented within the project APE
(letter from J.E. Bittner, SHPO, Alaska DNR, Division of Parks and Recreation, Office of
History and Archaeology, Anchorage, AK, to M. Salzetti, Kenai Hydro, LLC, Homer,
AK, March 10, 2015).
Kenai Hydro’s cultural resources report states that, to date, no potential TCPs were
identified during the cultural resources study but consultation with Native organizations
would continue and any TCPs identified in the future would be evaluated.
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3.3.6.2 Environmental Effects
Project-related Effects on Cultural Resources
Project-related effects on cultural resources within the APE are likely to occur
from project construction, O&M, use and maintenance of project roads, recreation,
vandalism, and mitigation measures associated with other project environmental
resources. Project effects are considered adverse when an activity may alter, directly or
indirectly, the characteristics of a historic property that qualify the property for inclusion
in the National Register. If adverse effects are found, consultation with the Alaska SHPO
and other parties would be required to develop alternatives or modifications to avoid,
minimize, or mitigate such adverse effects. Within the project APE, the Alaska SHPO
determined that six historic-era archaeological sites and six architectural resources are
ineligible for listing on the National Register. Kenai Hydro has identified project effects
on eligible or unevaluated resources that may occur as a result of project construction,
maintenance, and operation (Kenai Hydro, 2018a). As is discussed in more detail below,
Kenai Hydro would address project-related effects on cultural resource through
implementation of an HPMP.
Our Analysis
In the short term, construction activities associated with the proposed project may
result in direct effects on archaeological sites and historic structures in the project APE.
Over the license term, other activities such as road maintenance and recreational use
could also affect these resources. Access to cultural resources sites can result in the
collection of important artifacts or the dismantling of structures for firewood or other
purposes. Specific project-related effects on eligible and unevaluated resources are
identified in table 3-31.
Table 3-31. Project effects on eligible cultural resources within the project APE and
proposed treatment (Source: Kenai Hydro, 2018a).
AHRS
Number Site Description
Project
Effect
Evaluation
of Effect Proposed Treatment
SEW-
00029 Alaska Railroad Project
access road
No adverse
effect
Consideration during
future planning;
interpretive signage
SEW-
00148
Seward-Moose
Pass Trail
Project
access road No effect
Consideration during
future planning; possible
monitoring during
construction; interpretive
signage
SEW-
00285 Solars Sawmill Erosion and
exposure,
Adverse
effect
Close access road to the
public; periodic
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AHRS
Number Site Description
Project
Effect
Evaluation
of Effect Proposed Treatment
public
visitation
monitoring; interpretive
signage
SEW-
00659
Case Mine
District and
Components:
Public
visitation
Adverse
effect
Periodic monitoring;
interpretive signage
Case Mine camp
area
Public
visitation
Adverse
effect
Lakeside Trail None No effect
Lakeside Trail
area
Public
visitation
Adverse
effect
Mill site None No effect
Mine workings None No effect
North Grant Lake
Cabin (SEW-
00823)
Public
visitation
Adverse
effect
Grant Lake Road
to Case Mine
(SEW-01454)
None No adverse
effect
Case Mine
prospect pits
(SEW-01522)
None No effect
SEW-
01455 Grant Lake Trail None No adverse
effect
Consideration during
future planning
SEW-
01521
Sawmill-Upper
Trail Lake Trail Unknown No adverse
effect
Consideration during
future planning
-- Commemorative
INHT None No effect
Consideration during
future planning;
interpretive signage
According to Kenai Hydro’s archaeological site record for the Solars Sawmill
(SEW-00285), the site has changed a great deal since it was originally recorded in the
early 1980s. A historic cabin that had been observed at the site has since collapsed, and
only a few pieces of lumber of a second structure remained. A fisheries research camp
associated with the Chugach National Forest had been established at the site, and the site
record implies that much of the lumber from this second structure was used to construct
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the camp. Kenai Hydro observed a plywood tent platform and an earthen berm at the site
that suggests that the land at the site had been cleared, possibly with heavy equipment. A
recent outhouse was also present. Kenai Hydro’s report also reports that in 2009, it
observed submerged historic features, including stone jetties, at the site (Mark Luttrell
2014 personal communication as cited by Meitl et al., 2015). In addition to the past
effects, Kenai Hydro states that continued public access and use as a modern campsite
would result in adverse effects. Fluctuation in the lake level and shoreline erosion and
exposure of submerged features and associated artifact concentrations could also result in
effects, including lateral displacement of feature elements and vertical deflation of
associated artifacts. Additional exposure of artifacts along the shoreline would also
attract more unauthorized collection by the public on the site.
The Case Mine District contains three distinct areas within the APE that are
connected by a trail. These areas contain a number of elements that contribute to the
District’s National Register eligibility. While Kenai Hydro would not locate
infrastructure associated with the proposed project near the District, such as Solars
Sawmill, the site is easily accessible by both trail and boat and is heavily used by the
public. Kenai Hydro notes that public access was adversely affecting the artifacts and
features associated with three components of the District that contribute to the District’s
eligibility (the Case Mine camp area, the Lakeside Trail area, and the North Grant Lake
Cabin). As such, the District itself would be adversely affected. Kenai Hydro also notes
that the District includes active mining claims, but activity associated with mining
activity is not related to the proposed project.
Kenai Hydro concludes that all other eligible or unevaluated sites documented
within the project APE were either not experiencing effects or effects as a result of public
visitation were not adverse.
In its letter filed on April 18, 2016, the Alaska SHPO determined that an overall
finding of adverse effect is appropriate for the proposed project but acknowledged that
some resources would see an adverse effect while others would not (letter from J.E.
Bittner, Alaska State Historic Preservation Officer, Alaska Department of Natural
Resources, Division of Parks and Outdoor Recreation, Office of History and
Archaeology, to M. Salzetti, Manager, Kenai Hydro, LLC, Homer, AK. March 10,
2015).
Management of Historic Properties
Kenai Hydro filed a draft HPMP to address project-related effects on eligible or
potentially eligible cultural resources within the APE with its April 18, 2016, final license
application. By letter filed on October 3, 2016, Kenai Hydro states that it provided the
consulting parties with copies of the draft HPMP in September of that same year (letter
from M. Salzetti, Manager, Kenai Hydro, LLC, Homer, AK, to K.D. Bose, Secretary,
FERC, Washington, D.C., September 30, 2016). Kenai Hydro filed a final HPMP (dated
January 2018) with the amended application on January 16, 2018.
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Forest Service final 4(e) condition 19 requires the implementation of a “Heritage
Resources Management Plan”; the HPMP filed with the application constitutes the plan
required by the condition.
Kenai Hydro prepared the HPMP considering the Commission and Advisory
Council’s joint document, Guidelines for the Development of Historic Properties
Treatment Plans for FERC Hydroelectric Projects (Commission and Advisory Council,
2002) and designed the document to prescribe both general processes and specific actions
to manage historic properties over the term of any new license issued. Kenai Hydro
intends for the HPMP to serve as a guide for operating personnel performing necessary
project-related activities and to prescribe site treatments designed to address ongoing and
future effects on historic properties.
In its HPMP, Kenai Hydro proposes several general management measures for
historic properties, including but not limited to the appointment of an HPMP coordinator
to oversee implementation of the plan over the license term,71 a requirement for
employee training to ensure that employees are knowledgeable of cultural resources and
the requirements of the HPMP, a plan for monitoring eligible or potentially eligible
resources, plans for additional cultural resources inventories and site evaluations, a plan
for the treatment of inadvertent discoveries, procedures for the treatment of human
remains that may be identified during project-related activities, a plan for the curation of
cultural materials recovered during implementation of mitigation measures, plans for
public interpretation at specific locations, and requirements for annual cultural resources
reporting to the Commission, the Alaska SHPO, the Forest Service, participating Native
organizations, and other consulting parties as appropriate. Additionally, the HPMP
contains a list of activities that Kenai Hydro proposes be exempt from section 106
consideration. In addition to general management measures and protocols, the HPMP
also discusses specific project effects on all resources and provides measures to avoid,
lessen, or mitigate adverse effects on those that are eligible or potentially eligible for
listing on the National Register.
In its HPMP, Kenai Hydro also proposes to install interpretive panels and conduct
periodic monitoring of Solars Sawmill and Case Mine District to resolve adverse effects
attributable to public visitation. The interpretive panels would warn visitors not to
remove artifacts from the sites or to disturb site features and structures. Additionally, the
project access road near Solars Sawmill would be closed to the public.
On March 1, 2019, the Forest Service filed its comments on the April draft 2018
HPMP and requested that it be provided with a copy of the January 16, 2018 final HPMP.
In its comments, the Forest Service requested that Kenai Hydro revise the draft HPMP as
follows: (1) reference, as appropriate, the Programmatic Agreement Among USDA Forest
71 The HPMP coordinator would act as the ECM for cultural resources involving
construction and operation of the project.
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Service, Alaska Region, the Advisory Council on Historic Preservation, and the Alaska
State Historic Preservation Officer, Regarding Heritage Resource Management on
National Forests in the State of Alaska (Forest Service PA; 2017); (2) remove references
to the Programmatic Agreement Among The Federal Energy Regulatory Commission
And The Alaska State Historic Preservation Officer For Managing Historic Properties
That May Be Affected By A License Issuing To Chugach Electric Association, Inc. For
the Cooper Lake Hydroelectric Project In Kenai Peninsula Borough, Alaska (FERC No.
2170-029); (3) clarify of the difference between reconnaissance investigations and
intensive field surveys; (4) clarify the federal recognition status of the Qutekcak Native
Tribe; (5) include section 106 training for the HPMP coordinator and clarification
regarding duties, responsibilities, and qualifications; (5) clarify cultural resources
planning activities that do not require section 106 review; (6) include notification and
other protocols for inadvertent discovery of human remains considering the measures
provided in the Forest Service PA; and (7) address specific comments related to
management of Solars Sawmill and the Case Mine District.
Also, on March 1, 2019, the Alaska SHPO filed its comments on the January 16,
2018 final HPMP (letter from J.E. Bittner, Alaska State Historic Preservation Officer,
Alaska Department of Natural Resources, Division of Parks and Outdoor Recreation,
Office of History and Archaeology, to K. Hogan, Office of Energy Projects, Federal
Energy Regulatory Commission). In its comments, the Alaska SHPO advised the
Commission to notify the ACHP of its March 10, 2015 finding that the project would
result in adverse effects to historic properties and that that the Commission execute an
agreement document to implement the HPMP. The SHPO also commented that figures
in the HPMP should be revised to reflect the location of the Commemorative Iditarod
Trail and that it wished to consult with Kenai Hydro further to ensure that the new route
would be consistent with the gold rush characteristics that the trail was intended to
portray. The Alaska SHPO noted that installation of interpretive signs (particularly for
the Alaska Railroad, Seward-Moose Pass Trial, Commemorative Iditarod Trail, Solars
Sawmill, and Case Mine District) would require specific agency authorizations, could be
more harmful than other mitigation options such as public education and awareness, and
recommended further consultation to determine appropriate management measures.
Finally, the Alaska SHPO recommended that specific criteria provided in the Forest
Service PA executed between the Forest Service, Advisory Council, and Alaska SHPO be
included in the HPMP to ensure that there is no confusion between the requirements in
the Forest Service PA and the stipulations that would be provided in the Commission’s
PA, which would implement the HPMP.
Our Analysis
Kenai Hydro’s proposed HPMP includes measures that are consistent with most of
the Commission and Advisory Council’s 2002 guidelines. However, inclusion of
additional information in a final HPMP would improve the document for full compliance
under section 106. The HPMP would satisfy Forest Service’s final 4(e) condition 19.
Section 3.2 of the HPMP describes the roles and responsibilities of consulting parties.
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However, although section 3.2.6 discusses the roles that Native organizations have played
during the licensing process, it does not identify any specific Native organizations by
name nor does it discuss how they might be involved in the future other than receiving
copies of annual reports. We assume that the Native organizations identified under the
definition of “consulting parties” in the acronyms and abbreviations section of the HPMP
would be those that would also be specified in section 3.2.6, but clarification would be
appropriate. Additionally, because Commission staff granted Mr. Mark Luttrell cultural
resources consulting party status for the project, Mr. Luttrell should also be included in
definition of “consulting parties” in the HPMP. Mark Luttrell’s qualifications as
consulting party in the HPMP include being a practicing professional archaeologist in the
state of Alaska who has intimate knowledge of cultural resources within the project area.
He has also assisted with the applicant’s contract archaeologist and participated in
cultural resources work group meetings involved with this licensing. Also, many of his
observations are incorporated into the HPMP.
Section 3.4 of the HPMP does not discuss Kenai Hydro’s efforts to identify
potential TCPs at the project. Section 4.3 of the Cultural Resources Study Plan calls for
the implementation of a subsistence and cultural use study, and section 3.2 of Kenai
Hydro’s final cultural resources study report (Meitl et al., 2015) states that the
“identification of TCPs has relied on consultation with the aforementioned Native
organizations” and that no TCPs were identified. However, neither the report nor the
HPMP discuss when this consultation occurred, which tribes were consulted, or if any
tribal concerns regarding potential TCPs or traditional use areas were expressed. Further,
the study report also states that Kenai Hydro would “continue to consult with Native
groups with close traditional ties to the project area and will evaluate any TCPs identified
in the future.” However, as mentioned in the paragraph above, the HPMP does not
specify the circumstances under which Native organizations would be consulted in this
regard. Such circumstances would include any possible tribal concerns involving
culturally significant plants that might be affected by project construction, especially
ground-disturbing activities. Clarification regarding the status of the TCP study and the
conditions under which additional consultation with Native organizations would occur
would improve the HPMP.
The APE, as depicted in figure 1.3-2 of Kenai Hydro’s cultural resources report
and figure 4 of the HPMP, does not include a small section of the proposed transmission
line extending west from where it crosses the Seward Highway to its interconnection with
the main power distribution line. This section of the transmission line is contained within
the proposed project boundary. The HPMP should either explain why this section of the
transmission line was excluded from the APE or include a plan to survey this area in the
future. Additionally, Kenai Hydro states in the HPMP that the Alaska SHPO concurred
with the definition of the APE in a March 11, 2015, letter, but this letter does not appear
to have been filed with the Commission. A copy of this letter should be included in an
appendix to the HPMP.
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Section 4.10 of the HPMP, states that an HPMP coordinator would be appointed at
the time of any license acceptance. This individual would coordinate all HPMP activities
pertaining to cultural resources. Consideration of the Forest Service’s recommendation
that the HPMP coordinator receive section 106 training and other comments related to
coordinator responsibilities would ensure that this individual fully understands the
requirements of both section 106 and the requirements of the HPMP. Additionally, while
Attachment E-3 of the amended final license application provides a general schedule for
implementation of some of the measures contained within the HPMP, the schedule does
not include all HPMP measures nor is the schedule provided in the HPMP itself.
Inclusion in the HPMP of specific deadlines for the completion of HPMP tasks
(e.g., employee HPMP training and cultural resources monitoring) would ensure that all
HPMP tasks can be tracked and are completed in a timely manner.
In the HPMP, Kenai Hydro proposes to conduct “periodic” monitoring of affected
historic properties. While the HPMP states that timing of monitoring of the Solars
Sawmill site (SEW-00285) and the Case Mine District (SEW-00659) would be
coordinated with the Forest Service, the HPMP should contain a specific monitoring plan
that details: (1) the circumstances under which monitoring would occur, both during
construction activities and afterward; (2) who would participate in the monitoring; (3)
how frequently regular monitoring would be undertaken after construction and over the
license term; and (4) how monitoring results would be disseminated to consulting parties
and used. For example, if regular monitoring of a particular historic property over the
license term indicates that project-related effects are ongoing, the plan should identify
what would “trigger” further review and a possible change in site management.
Including these details in the HPMP would ensure that the Alaska SHPO, the
Commission, the Forest Service, Native organizations, and other parties are regularly
informed of the condition of significant cultural resources within the project APE, both
during construction and over the term of the license.
Kenai Hydro consulted with the Alaska SHPO on its National Register evaluations
and assessment of project effects and filed documentation of this consultation with the
Commission. Kenai Hydro states that the consulting parties were provided with copies of
the draft HPMP in September of 2016 and the final HPMP in January of 2018. However,
per the Forest Service’s March 1, 2019 letter, the Forest Service states that it did not
receive a copy of the final HPMP. Additionally, Kenai Hydro’s January 2018 HPMP also
does not address the Alaska SHPO’s s March 1, 2019 comments in which the SHPO
stated that further consultation regarding proposed mitigation measures for effects to
historic properties was needed, particularly with regard to the use of interpretive signs as
a mitigation measure. We agree that further consultation with the Alaska SHPO and the
Forest Service to reach agreement on the management of historic properties would be
appropriate. For example, the Case Mine District (SEW-00659) and the Solars Sawmill
site (SEW-00285) are heavily used by the public, and the associated site records
document the long-term and detrimental effects of this use. The HPMP could clarify the
rationale behind the proposal for periodic monitoring and interpretation to resolve
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adverse effects versus implementation of other more active management/mitigation
measures (such as data recovery and complete documentation and recordation of all site
features) and could consider the Forest Service’s comments regarding these two
resources. Additionally, section 5.5.3 of the HPMP states that fluctuations in the lake
level could increase erosion at the Solars Sawmill site and expose historic features of the
site, including the jetties observed by Luttrell, that are typically submerged. The HPMP
states that these effects are expected to be minor. Additionally, the HPMP also states that
effects to the Case Mine District as a result of reservoir drawdown would also be minor.
However, inclusion in the HPMP of a requirement to inspect and document any features
at the site should they be exposed during a drawdown (or any other period of low lake
level) and to formally assess site conditions and project effects would ensure that these
effects are appropriately addressed in accordance with section 106.
Revision of the January 2018 HPMP to consider the March 1, 2019 comments of
the Alaska SHPO and Forest Service and in consultation with these two agencies and
other consulting parties, would help to minimize potential effects on historic properties
over any license term and ensure compliance with section 106.
• the specific Native organizations that will be consulted and how they will
be involved;72
• addition of Mark Luttrell as a consulting party;
• a discussion of the methods used to conduct the TCP study, which Native
organizations were consulted, the results of such consultation, and the
conditions under which Native organizations would continue to be
consulted in the future;
• clarification of the survey status of the section of the proposed transmission
line extending west from where it crosses the Seward Highway to its
interconnection with the main power distribution line;
• a specific schedule for completion of all HPMP measures;
• a monitoring plan that specifies the circumstances under which monitoring
would occur, who would conduct the monitoring, how frequently regular
monitoring would take place, and how monitoring results would be
disseminated and used;
• specific factors that would trigger implementation of more active
management/mitigation measures over periodic monitoring;
72 Consultation would cover their role and participation involving the construction
plan to survey areas prior to ground-disturbing activities for culturally significant plants
and record and collect them, if necessary.
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• a provision to formally evaluate and assess project effects on submerged
cultural resources should they be exposed in the future; and
• an appendix containing documentation and copies of all section 106
consultation throughout the licensing process, including documentation of
Alaska SHPO concurrence on the project APE and concurrence with all
measures contained within the HPMP (including the use of monitoring and
installation of interpretive signs as mitigation measures), and an appendix
that details the extent to which each comment received on the HPMP is
addressed in the revised plan.
To meet the section 106 requirements, the Commission intends to execute a PA
with the Alaska SHPO for the proposed project for the protection of historic properties
that would be affected by project construction and operation. The terms of the PA would
require Kenai Hydro to address all historic properties identified within the project APE
through a revised final HPMP.
3.3.7 Socioeconomic Resources
3.3.7.1 Affected Environment
The project is located within the boundaries of the Kenai Peninsula Borough. The
nearest community is the unincorporated town of Moose Pass—population about 206—
about 1.5 miles to the northwest of Grant Lake. The nearest major town is Seward,
population about 2,830, located about 25 miles south of Moose Pass.
Population Demographics
Population density in the project vicinity is relatively low. The project area is
about 100 miles from Anchorage, Alaska’s largest city. The population of the area is
centered near the Seward Highway.
The population characteristics of the project area are similar to those of the Kenai
Peninsula Borough, as a whole. Population growth was greatest during the 1970s and
early 1980s. The most recent U.S. Census data for selected places in the Kenai Peninsula
Borough are shown in table 3-32. Total population change on a percentage basis was
greatest in Cooper Landing and Moose Pass, which from 2010 to 2016 saw population
increases of 69 and 62 percent, respectively.
Table 3-32. Population growth (number and percent of change) in the Kenai Peninsula
Borough and selected places in the borough (2010–2016) (Source: U.S.
Census 2010, 2016a).
Location 2010 2016 Total Change
Kenai Peninsula Borough 55,400 57,637 4%
Homer 5,003 5,418 8%
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Location 2010 2016 Total Change
Kachemak City 472 537 14%
Kenai 7,100 7,551 6%
Seldovia (city) 255 247 (3%)
Seward 2,693 2,714 1%
Soldotna 4,163 4,471 7%
Cooper Landing 289 489 69%
Moose Pass 219 354 62%
Table 3-33 presents a profile of the fast-growing population centers closest to the
project, by comparison to the larger Kenai Peninsula Borough. Population centers in the
project area containing the largest workforce as a proportion of total population were
Seward and Moose Pass, with workforce percentages of 87.8 and 84.5 percent
respectively. Residents identifying as Alaskan Native comprised 15 percent in Moose
Pass, compared to 8 percent in the Borough overall. Moose Pass also contains the
highest poverty levels among families of any location in the project area, with 27.6
percent of families below poverty compared to 7.1 percent for the Borough overall.
Table 3-33. Population Demographic Profile for Selected Places within Kenai Peninsula
Borough near the project area, 2016 (Source: U.S. Census, 2016b, c).
Location
Percent of Total Population Total
Number
of
Families
Median
Family
Income
Percent
Families
Below
Poverty
Potential
Work Force
(Age 16+) White
Alaskan
Native
Origin
Kenai
Peninsula
Borough
79.6% 84% 8% 13,701 $82,242 7.1%
Seward 87.8% 95% 5% 468 $86,875 7.7%
Cooper
Landing
67.3% 85% 0% 151 $78,542 4.0%
Moose
Pass
84.5% 69% 15% 123 $146,250 27.6%
3-208
Land Ownership
Most of the lands in the project area are public, either state or federal. However,
there are several areas of private ownership along the Seward Highway. Borough land
management policies are described in the Kenai Peninsula Borough Comprehensive Plan
and the Kenai Peninsula Borough Coastal Zone Management Plan. Table 3-34 and figure
3-44 show land ownership in the Kenai Peninsula Borough. Land use is predominantly
characterized as vacant and is shown in figure 3-45.
Table 3-34. Kenai Peninsula Borough land ownership information (Source: Kenai
Hydro, 2018a).
Owner Square Miles Percent of Total
University of Alaska 25.9 0.1%
Cities 26.9 0.1%
Mental Health Trust 27.7 0.1%
Kenai Peninsula Borough 107.3 0.4%
Private 401.7 1.6%
Native 1,593.6 6.4%
State 3,426.6 13.9%
Federal 10,610.9 42.9%
Total Upland 16,220.6 65.5%
3-209
Figure 3-44. General Kenai Peninsula land ownership delineation (Source: Kenai Hydro, 2018a, as modified by staff).
3-210
Figure 3-45. Land use in the Kenai Peninsula Borough (Source: Kenai Hydro, 2018a, as modified by staff).
3-211
Regional, Local, and Tribal Economies
Industry and Employment
Table 3-35 presents a profile of industry and employment for the fast-growing
population centers closest to the project and compares them to the larger Kenai Peninsula
Borough. While educational services and health care and social assistance represents the
largest industry sector by total employment for the Borough overall (24.2 percent of total
workforce employment), other employment sectors represent the largest sources of
employment for population centers in the project area. The arts, entertainment, and
recreation, and accommodation and food services sector comprise 21.4 percent and
34.4 percent of total employment in Seward and Cooper Landing, respectively. Retail
trade is the largest employment sector in Moose Pass (32.9 percent), followed by
educational services, and health care and social assistance (22.9 percent). Construction
represents 19 percent of employment in Cooper Landing. The rate of unemployment in
Moose Pass is 22.4 percent, which is more than four times that of the Kenai Peninsula
Borough. Other population centers exhibit unemployment rates closer to the Kenai
Peninsula Borough rate of 5.3 percent.
Table 3-35. Population industry and employment profile for selected places within
Kenai Peninsula Borough near the project area, 2016 (Source: U.S.
Census, 2016c).
Location
Three Largest Industries by Percent of Total
Employment
Percent
Unemployment
Kenai Peninsula
Borough
1.Educational services, and health care and
social assistance (24.2%)
2.Agriculture, forestry, fishing and hunting,
and mining (12.5%)
3.Retail trade (11.3%)
5.3%
Seward 1.Arts, entertainment, and recreation, and
accommodation and food services (21.4%)
2.Public administration (18.9%)
3.Educational services, and health care and
social assistance (10.9%)
4.4%
Cooper Landing 1.Arts, entertainment, and recreation, and
accommodation and food services (34.4%)
2.Construction (19.0%)
3.Retail trade (10.4%)
4.6%
3-212
Location
Three Largest Industries by Percent of Total
Employment
Percent
Unemployment
Moose Pass 1.Retail trade (32.9%)
2.Educational services, and health care and
social assistance (22.9%)
3.Agriculture, forestry, fishing and hunting,
and mining (20.7%)
22.4%
Income and Occupation
Table 3-36 provides a profile of income and occupation for the fast-growing
population centers closest to the project and compares them to the larger Kenai Peninsula
Borough. Per capita income is highest in Moose Pass, at $49,223 and with zero percent
of the population employed in the construction sector. Cooper Landing has 19 percent
employment in the construction sector and a per capita income of $30,090. Seward has
5.9 percent employment in the construction sector and a per capita income of $27,810.
By comparison, in the Kanai Peninsula Borough, construction constitutes 8% percent of
total workforce and per capita income is $32,556.
Table 3-36. Population income and occupation profile for selected places within Kenai
Peninsula Borough near the project area, 2016 (Source: U.S. Census,
2016c).
Location Per Capita Income
Percent of Total Workforce
Employed in Construction
Kenai Peninsula Borough $32,556 8.0%
Cooper Landing $30,090 19.0%
Moose Pass $49,223 0.0%
Seward $27,810 5.9%
Subsistence Hunting and Gathering
Although subsistence hunting occurs throughout Alaska all year long and is
central to the customs and traditions of many cultural groups in Alaska, the project is
located within the Anchorage–Mat-Su–Kenai Peninsula Non-subsistence Use Area
(Alaska DFG, 2018a). Non-subsistence use areas are defined as areas where dependence
upon subsistence (customary and traditional uses of fish and wildlife) is not a principal
characteristic of the economy, culture, and way of life.
3-213
For some rural Alaska residents, subsistence hunting is critical to their nutrition,
food security, and economic stability. Subsistence hunting in Alaska is normally
managed under the same regulations as general season, drawing, and registration hunts,
and a hunting license and harvest tag is usually required. Game may be harvested for
cultural and subsistence uses under a number of authorized programs. The project is
located within Game Management Unit 7. Depending on the community and area,
moose, caribou, deer, bears, Dall sheep, mountain goats, and beavers are commonly used
land mammals. Seals, sea lions, walruses, and whales make up the marine mammal
harvest (Alaska DFG, 2018b).
The Alaska Board of Fisheries and the Alaska Board of Game may not authorize
subsistence hunting and fishing in non-subsistence use areas. In these areas, the
subsistence priority does not apply. Since the project is located within a non-subsistence
use area, the issue of subsistence hunting and fishing is not relevant to project actions.
Public Sector
Kenai Peninsula Borough is incorporated as a second-class borough and as such
levees taxes and fees, which fund borough government and services. The Kenai
Peninsula Borough operates the schools and the landfill, but most other services such as
sewer, water, fire, and law enforcement are managed locally by each city. The 43
schools in the Kenai Peninsula School District have 8,341 students enrolled and employ
578 teachers (Alaska Department of Community and Regional Affairs, 2018).
Electricity
A majority of the electricity supplied to the Kenai Peninsula is provided by the
Homer Electric Association. However, Chugach Electric supplies electricity to the
project area. The proposed project would supply Homer Electric Association customers.
3.3.7.2 Environmental Effects
Construction Effects on Socioeconomic Resources
Project construction has the potential to affect local economies through additional
demands on local construction labor force. Additionally, Seward Highway road
maintenance may be required as a result of increased construction traffic transiting
locally to and from the project area during construction.
Kenai Hydro would place priority on employing local construction personnel
where available. However, given the relatively small workforce population local to the
project area, additional assistance would be required. Kenai Hydro would employ
additional qualified construction staff as needed to ensure high quality construction with
an emphasis on efficiency and long-term operation. Kenai Hydro anticipates that the
lodging requirements of construction staff would be accommodated within the local
communities of Moose Pass and Seward.
3-214
As with most multi-season construction efforts, onsite labor needs and associated
payroll would fluctuate and coincide with the periods most conducive to development of
discrete infrastructural components. Table 3-37 provides Kenai Hydro’s monthly
estimates for staffing and associated payroll costs. These estimates are based on certain
assumptions with respect to receipt of a FERC license and may fluctuate based on timing
and specific requirements set forth in the license.
Table 3-37. Kenai Hydro monthly labor estimates and associated payroll expenditures
for construction of the Grant Lake Project (Source: Kenai Hydro, 2018a).
Month
2019 2020
Monthly
Staffing
Totals
Percent of
Staffing by
Month
Monthly
Staffing
Costs
Monthly
Staffing
Totals
Percent of
Staffing by
Month
Monthly
Staffing
Costs
Jan NA NA NA 15 2.45 $311,714
Feb NA NA NA 15 2.45 $311,714
Mar NA NA NA 15 2.45 $311,714
Apr NA NA NA 20 3.27 $415,619
May 15 2.45 $311,714 22 3.59 $457,181
Jun 30 4.90 $623,428 50 8.17 $1,039,047
Jul 45 7.35 $935,142 52 8.50 $1,080,609
Aug 60 9.80 $1,246,856 52 8.50 $1,080,609
Sep 54 8.82 $1,122,170 33 5.39 $685,771
Oct 40 6.54 $831,237 15 2.45 $311,714
Nov 42 6.86 $872,799 15 2.45 $311,714
Dec 20 3.27 $415,619 2 0.33 $41,562
Note: NA — Data not available
Our Analysis
Over the short-term, construction of the project would contribute slightly to
additional employment and income within the regional economy. Depending on
contractor hiring practices, some portion of the project-induced employment would likely
benefit individuals residing within the project area. However, because workforce
requirements for the project would be relatively modest and at least some portion of those
employed would likely commute from existing residential locations in the region rather
than relocate temporarily from more distant points of origin, the project would not
generate major population growth associated with the in-migration of construction-phase
3-215
workers. As a result, the project would not generate major increases in demand for local
housing or strain public services.
The location of the project area away from established residential areas would
reduce the potential for construction-related disturbances to residents from noise, dust, or
construction vehicle traffic effects. The Seward Highway (AK-9), which crosses through
the west side of the project boundary, is a state highway and thus has adequate capacity
to accommodate traffic and transportation related to the project.
Any construction personnel temporarily relocated to the project area during the
construction phase would be housed within existing lodging or rental housing in and
around the project area, which is available in adequate supply. Although limited
accommodations exist in Moose Pass (including the Midnight Sun Log Cabins and Trail
Lake Lodge), the town of Seward has numerous accommodations because Seward is a
popular destination for tourism, and the hospitality industry is well established. Because
there would be no significant influx of new population into the economic area, the project
would not affect government services. The new facilities constructed as part of this
project would not displace any businesses or residences.
Additional Seward Highway road maintenance may be required because of
increased construction traffic transiting locally to and from the project area during
construction; however, Kenai Hydro would store most equipment onsite during the
construction season, thereby limiting the amount of additional highway use (Kenai
Hydro, 2018a).
To the extent that construction materials would be procured from sources located
within the local economy, project-related spending on supplies within the project area
would likely result in a positive short-term effect on local tax revenues, income, and
employment.
Operation Effects on Socioeconomic Resources
Project operation could place some demands on the local workforce during the
lifetime of the project. Once operational, Kenai Hydro would operate the project
remotely. Although Kenai Hydro could employ a single local resident near the project to
conduct regular checks related to maintenance, safety, and adequate operation, it is more
likely that Kenai Hydro/Homer Electric Association personnel would travel to the local
project area on an as-needed basis.
Kenai Hydro currently has no control over local public power (electricity) costs
because the Chugach Electric Association provides power to the local area. However,
electric reliability would most likely increase in the communities of Moose Pass and
Seward as a result of the proximal/distributed generation associated with the project.
Additionally, hydropower swap agreements between the Homer Electric Association and
the Chugach Electric Association or the City of Seward (Grant Lake Project power for
3-216
Bradley Lake Project power 73) could avoid transmission wheeling tariffs that would
reduce power costs for both entities.
Our Analysis
Operation of the project would have limited, long-term socioeconomic effects on
the local workforce population and economy. However, because any increase in total
employment would be negligible, no long-term adverse effects would occur as a result of
project operation. There would be no long-term, beneficial or adverse effects on local
income, sales, employment, and tax revenues in the project area.
3.4 NO-ACTION ALTERNATIVE
Under the no-action alternative, the proposed Grant Lake Project would not be
constructed. The existing physical, biological, cultural, and socioeconomic resources
associated with the area would not be affected, and electrical generation from the project
would not occur. The power that would have been developed from a renewable resource
would be replaced from other power plants and likely primarily fossil-fueled facilities,
and the environmental benefits of generating power from a renewable resource would not
be realized. Beneficial effects of the project on winter habitat for anadromous species in
Grant Creek would also not occur.
73 The Bradley Lake Project (FERC No. 8221) is located on the Kenai Peninsula
and diverts water from Bradley Lake to a powerhouse on Kachemak Bay, about 22.5
miles east northeast of Homer, Alaska. The Bradley Lake powerhouse has two 45-MW
generating units.
4-1
4.0 DEVELOPMENTAL ANALYSIS
In this section, we look at the Grant Lake Project’s use of Grant Lake and Grant
Creek for hydropower purposes to see what effect various environmental measures
would have on the project’s costs and power generation. Under the Commission’s
approach to evaluating the economics of hydropower projects, as articulated in Mead
Corp.,74 the Commission compares the current project cost to an estimate of the cost of
obtaining the same amount of energy and capacity using the likely alternative source of
power for the region (cost of alternative power). In keeping with Commission policy as
described in Mead Corp., our economic analysis is based on current electric power cost
conditions and does not consider future escalation of fuel prices in valuing the
hydropower project’s power benefits.
For each of the licensing alternatives, the analysis includes an estimate of:
(1) the cost of individual measures considered in the EIS for the protection, mitigation,
and enhancement of environmental resources affected by the project; (2) the cost of
alternative power; (3) the total project cost (i.e., for construction, operation,
maintenance, and environmental measures); and (4) the difference between the cost of
alternative power and total project cost. If the difference between the cost of alternative
power and total project cost is positive, the project produces power for less than the cost
of alternative power. If the difference between the cost of alternative power and total
project cost is negative, the project produces power for more than the cost of alternative
power. This estimate helps to support an informed decision concerning what is in the
public interest with respect to a proposed license. However, project economics is only
one of many public interest factors the Commission considers in determining whether,
and under what conditions, to issue a license.
4.1 POWER AND DEVELOPMENTAL BENEFITS OF THE PROJECT
Table 4-1 summarizes the assumptions and economic information used in the
analysis. This information was provided by Kenai Hydro in its amended final license
application. The values provided by Kenai Hydro are reasonable for the purposes of the
analysis. Cost items common to all alternatives include: taxes and insurance costs; net
investment (the total investment in power plant facilities remaining to be depreciated);
estimated future capital investment required to maintain and extend the life of plant
equipment and facilities; licensing costs; normal O&M cost; and Commission fees.
74 See Mead Corporation, Publishing Paper Division, 72 FERC ¶ 61,027 (July
13, 1995). In most cases, electricity from hydropower would displace some form of
fossil-fueled generation, in which fuel cost is the largest component of the cost of
electricity production.
4-2
Table 4-1. Parameters for the economic analysis of the Grant Lake Project (Source:
Kenai Hydro, 2018a, as modified by staff).
Parameter Value
Period of analysis (years) 30
Period of financing 20
State and local tax rate Exempt
Federal income tax rate Exempt
Construction costa $53,878,050 (2018)
Licensing costb $5,819,260 (2018)
Annual O&Mc $111,560 (2018)
Energy valued $124.43/MWh
Capacity value ($/kilowatt-year)e 0
Contingency spinning reserve valuef $50,000
Interest rateg 4.0
Discount rateh 3.0
a Kenai Hydro, 2018a, exhibit D, table D-4-1. Escalated from 2015 dollars to 2018
dollars. We removed estimated capital costs for plan development and equipment
from this value and provide those costs separately in the environmental measures to
enable cost comparisons among proposed and recommended measures.
b Licensing costs include the administrative, legal/studies, application preparation, and
other expenses to date. Kenai Hydro, 2018a, exhibit D, section 11. Escalated from
2015 dollars to 2018 dollars.
c Annual O&M includes routine costs to operate the project and maintain project
equipment, but does not include insurance value provided because that is calculated
separately. Kenai Hydro, 2018a, exhibit D, table D.5-1. Escalated from 2015 dollars
to 2018 dollars. We removed estimated annual costs for environmental measures
from this value and provide those costs separately in the environmental measures to
enable cost comparisons among proposed and recommended measures.
d Kenai Hydro, 2018a, exhibit D, section 6.2.
e There is no capacity market in this area of Alaska.
f Kenai Hydro, 2018a; Kenai Hydro cited a range of $40,159 to $70,257 (exhibit D,
section 6.1). Staff assumed a conservative value of $50,000 and converted it to a
$/MWh value of $2.69/MWh and added it to the energy value to get a composite
power rate of $127.12/MWh.
4-3
g Kenai Hydro, 2018a; Kenai Hydro cited a range of 3.0 to 4.65 percent (exhibit D,
section 5.1). Staff assumed a rate of 4.0 percent.
h S Kenai Hydro, 2018a, exhibit D, section 6.2.
4.2 COMPARISON OF ALTERNATIVES
Table 4-2 compares the installed capacity, annual generation, cost of alternative
power, estimated total project cost, and difference between the cost of alternative power
and total project cost for each of the alternatives considered in this final EIS: Kenai
Hydro’s proposal, the staff alternative, and staff alternative with mandatory conditions.
Under a no-action alternative, the project would not be constructed, so that alternative is
not included in table 4-2.
Table 4-2. Summary of the annual cost of alternative power and annual project cost
for the alternatives for the Grant Lake Project (Source: staff).
Kenai Hydro’s
Proposal Staff Alternative
Staff Alternative
with Mandatory
Conditions
Installed capacity
(MW)
5 5 5
Annual generation
(MWh)
18,600 18,600 18,600
Annual cost of
alternative power
($/MWh)
$2,364,430
127.12
$2,364,430
127.12
$2,364,430
127.12
Annual project cost
($/MWh)
$3,981,320
214.05
$3,953,810
212.57
$3,973,240
213.62
Difference between
the cost of
alternative power
and project cost
($/MWh)
($1,616,890)
(86.93)
($1,589,380)
(85.45)
($1,608,810)
(86.50)
a A number in parentheses denotes that the difference between the cost of alternative
power and project cost is negative, thus the total project cost is greater than the cost
of alternative power.
4-4
4.2.1 No-action Alternative
Under the no-action alternative, the project would not be constructed.
4.2.2 Applicant’s Proposal
The applicant’s proposal is the project as proposed by Kenai Hydro. Table 4-3
shows the staff-recommended additions, deletions, and modifications to Kenai Hydro’s
proposed environmental protection and enhancement measures and the estimated cost of
each.
Based on a total installed capacity of 5 MW and an average annual generation of
18,600 MWh, the cost of alternative power would be $2,364,430, or about
$127.12/MWh. The average annual project cost would be $3,981,320, or about
$214.05/MWh. Overall, the project would produce power at a cost that is $1,616,890,
or $86.93/MWh, more than the cost of alternative generation.
4.2.3 Staff Alternative
The staff alternative includes the same developmental upgrades as Kenai Hydro’s
proposal and, therefore, would have the same capacity and energy attributes. Table 4-3
shows the staff recommended additions, deletions, and modifications to Kenai Hydro’s
proposed environmental protection and enhancement measures and the estimated cost of
each.
Based on a total installed capacity of 5 MW and an average annual generation of
18,600 MWh, the cost of alternative power would be $2,364,430, or about
$127.12/MWh. The average annual project cost would be $3,953,810, or about
$212.57/MWh. Overall, the project would produce power at a cost that is $1,589,380,
or $85.45/MWh, more than the cost of alternative generation.
4.2.4 Staff Alternative with Mandatory Conditions
This alternative is similar to the staff alternative with the exception of several
mandatory conditions that would not be compatible with staff-recommended measures
or would be required in addition to staff-recommended measures. This alternative
would have an average annual generation of 18,600 MWh, and an average annual cost
of alternative power of $2,364,430, or about $127.12/MWh. The average annual project
cost would be $3,973,240, or about $213.62/MWh. Overall, the project would produce
power at a cost that is $1,608,810, or $86.50/MWh, more than the cost of alternative
power.
4.3 COST OF ENVIRONMENTAL MEASURES
Table 4-3 gives the cost of each of the environmental enhancement measures
considered in the analysis. We convert all costs to equal annual (levelized) values over
a 30-year period of analysis to give a uniform basis for comparing the benefits of a
measure to its cost.
4-5
Table 4-3. Cost of environmental mitigation and enhancement measures considered in assessing the environmental
effects of constructing and operating the Grant Lake Project (Source: staff).
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
General
1. Provide an ECM to oversee the project during
major construction activities. Ensure the ECM
has stop work authority. (Forest Service 4(e) 20)
Kenai Hydro,
Forest Service,
staff
$0 $9,480 d $9,480
2. Develop an annual compliance report that
includes a summary of compliance activities for
the previous year and annual stakeholder
meeting presentations of results.
Kenai Hydro $0 $19,570 $19,570
3. Conduct an annual project review meeting
during construction and the first 5 years of
operation. (FWS 10(j) 18, Alaska DFG 10(j) 18,
NMFS 10(j) 14)
Alaska DFG,
FWS, NMFS
$0 $1,990 e $1,990
4. Conduct an annual consultation meeting. (Forest
Service 4(e) 4)
Forest Service $0 $5,000 f $5,000
Geology and Soils Resources
5. Develop an ESCP to minimize erosion and
sediment disposition during construction.
Kenai Hydro $20,000g $3,790 g $5,050
4-6
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
6. Develop an ESCP that includes: (1) soil,
groundwater, and vegetation conditions;
(2) preventive measures based on site-specific
conditions; (3) location of areas for storage or
deposition of removed overburden including
erosion control to be used in those areas; and (4)
prescriptions for revegetation of all disturbed
areas, including location of treatment areas, plant
species and methods to be used, and an
implementation schedule. (Alaska DFG 10(j) 13,
FWS 10(j) 14, NMFS 10(j) 10)
FWS, NMFS,
Alaska DFG
$20,000h $4,740h $6,000
4-7
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
7. Develop an ESCP to control erosion, stream
sedimentation, dust, and soil mass movement
consistent with the standards and guidelines of
the Chugach National Forest Land Management
Plan, the Soil and Water Conservation Handbook
(FSH 2509.22), and the national BMPs and that
includes: (1) a description of the actual site
conditions, including any existing erosion or
sedimentation problems from roads, stream
crossings, trails, or other facilities; (2) detailed
descriptions, design drawings, and specific
topographic locations of all control measures; (3)
measures to divert runoff over disturbed land
surfaces, including sediment ponds at the
diversion and powerhouse sites; (4) revegetating
test-drive areas outside the roadbed; (5)
measures to dissipate energy and prevent erosion
at the tailrace; (6) a monitoring and maintenance
schedule; and (7) and other measures the Forest
Service and licensee mutually identify as
needing care to ensure resource protection.
(Forest Service 4(e) 19)j
Forest Service,
staff
$20,000i $5,690i $6,950
4-8
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
8. Include in the staff-recommended ESCP
measures to sample for lead in Grant Lake
sediments that may by mobilized during project
construction and operation, including measure to
prevent mobilization if needed
Staff $20,000f $0 $1,260
9. Develop a construction plan. (Forest Service 4(e)
19)j
Forest Service,
staff
$10,000k $0l $630
10. Develop a spoil disposal plan. (Forest Service
4(e) 19)j
Forest Service,
staff
$10,000k $0l $630
Aquatic Resources
11. Consult with NMFS and Alaska DFW following
biological monitoring after start of operations to
evaluate benefits of removing the logjam in
Reach 1 and remove if necessary to maintain
aquatic habitat.
Kenai Hydro $21,160 $0 $1,330
12. Provide channel maintenance flows of 800 cfs
for a continuous 8-hour period once a year for 2
years in every 10-year moving window to
promote sediment recruitment and transport from
the bypassed reach to Grant Creek. (FWS 10(j)
4, NMFS 10(j) 4, Alaska DFG 19(j) 4)
Kenai Hydro,
FWS, NMFS,
Alaska DFG, staff
$0 $0m $0
13. Provide minimum flows in the bypassed reach as
described in table 3-19.
Kenai Hydro,
FWS, NMFS,
Alaska DFG, staff
$0 $0 $0
4-9
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
14. Provide minimum flows downstream of the
tailrace in Grant Creek as described in table
3-21.
Kenai Hydro,
FWS, NMFS,
Alaska DFG, staff
$0 $0 $0
15. Enhance flows in Reaches 2 and 3 side channels. Kenai Hydro $0 $0n $0
16. Implement ramping rate restrictions to limit
downramping to 1 inch per hour from November
16 through May 15 and 2.25 inches per hour
from May 16 through November 15 and limit
upramping to 1 inch per hour during the winter
(November 16 through May 15), and 2 inches
per hour during the summer (May 16 through
November 15). Monitor ramping rates at a gage
in the project tailrace.
Kenai Hydro $10,000o $1,000o $1,630
17. Implement ramping rate restrictions to limit
downramping to 1 inch per hour and limit
upramping to 1 inch per hour during the winter
(November 16 through May 15), and 2 inches
per hour during the summer (May 16 through
November 15). (FWS 10(j) 3, NMFS 10(j) 3,
Alaska DFG 10(j) 3) Monitor ramping rates at a
gage downstream of the tailrace
FWS, NMFS,
Alaska DFG, staff
$0 $0p $0
4-10
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
18. Provide fail-safe provisions in the project design
and operation to ensure that required flow
releases are provided continuously to the
bypassed reach and the reaches of Grant Creek
downstream of the tailrace during routine
maintenance periods, emergency project
shutdowns, and interruptions to the power grid.
(Alaska DFG 10(j) 6, FWS 10(j) 6, NMFS 10(j)
6)
Kenai Hydro,
FWS, Alaska
DFG, NMFS, staff
$0q $0q $0
19. Monitor streamflows in the intake
structure/penstock (site ISF-1).
Kenai Hydro $15,000r $1,000r $1,950
20. Monitor streamflows in the Grant Creek
bypassed reach at the bypass pump and weir
slide gate (site ISF-3).
Kenai Hydro,
FWS, NMFS,
Alaska DFG, staff
$30,000s $2,000s $3,890
21. Monitor streamflows in Grant Creek downstream
of the tailrace (site ISF-2).
Kenai Hydro,
FWS, NMFS,
Alaska DFG, staff
$15,000r $1,000r $1,950
22. Measure channel maintenance flows in Grant
Creek by subtracting the flows through the
powerhouse/penstock from the flows measured
by the stream gage downstream of the tailrace
and monitor the flows throughout the duration of
the release.
FWS, Alaska
DFG, staff
$0 $0t $0
23. Monitor reservoir levels. Kenai Hydro, staff $0 $0t $0
4-11
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
24. Develop a reservoir management and inundation
plan. (Forest Service 4(e) 19)j
Forest Service $10,000k $0l $630
25. Use variable depth withdrawals from the project
intake from the surface to 2 feet below the lowest
lake surface elevation (688 feet NAVD88).
Kenai Hydro, staff $0u $0u $0
26. Implement the Operation Compliance
Monitoring Plan, which includes: (1) level and
temperature monitoring in Grant Lake; (2) flow
and temperature monitoring in Grant Creek
bypassed reach; (3) flow and temperature
monitoring in Grant Creek tailrace; (4) failsafe
provisions; (5) schedule for installing,
maintaining, and collecting flow and temperature
instrumentation; and (6) reporting.
Kenai Hydro $20,000v $0 $1,260
4-12
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
27. Develop an operation compliance monitoring
and reporting plan with measures to: (1) use
stream gages that meet USGS stream gage
standards, (2) comply with minimum flow
requirements in the bypassed reach and
downstream of the tailrace, (3) comply with
requirements for channel maintenance flows,
(4) use of monitoring sites ST-2 (GC200) and
RT-1 (at a depth of 0.5 meter) to compare
temperatures in Grant Lake and Grant Creek, and
(5) use real-time differences in temperature as
the compliance metric for comparing Grant
Creek and Grant Lake.
Staff $25,000f $0 $1,580
28. Develop a streamflow monitoring plan. FWS, NMFS,
Alaska DFG
$10,000w $0l $630
29. Develop an instream flow plan. (Forest Service
4(e) 19)i
Forest Service $10,000k $0l $630
4-13
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
30. As part of the Operation Compliance Monitoring
Plan, monitor water temperatures continuously in
Grant Lake upstream of the intake structure (RT-
1), in the intake structure (IT-1), and in the
downstream end of the Grant Creek bypassed
reach upstream of the tailrace (ST-1), and
monitor water temperatures every 15 minutes in
Grant Creek downstream of the tailrace (ST-2
[GC200]).
Kenai Hydro $40,000x $4,000x $6,520
31. As part of the streamflow monitoring plan,
monitor water temperatures year-round, for the
duration of the license, at intervals of no more
than one hour in Grant Lake near the intake at a
depth of 0‒0.5 meter, in the intake structure, and
in Grant Creek downstream of the tailrace,
following USGS water temperature monitoring
protocols.
FWS $30,000y $3,000y $4,890
32. As part of the streamflow monitoring plan,
monitor water temperatures year-round during
the first 5 years of operation at intervals of no
more than 1 hour in Grant Lake away from the
influence of the project intake at a depth of 0‒0.5
meter, in the intake structure, and in Grant Creek
downstream of the tailrace, following USGS
water temperature monitoring protocols.
Alaska DFG $30,000y $3,000y $4,890
4-14
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
33. As part of the streamflow monitoring plan,
monitor water temperature year-round in Grant
Lake near the intake at a depth of 0‒1 meter, in
the intake structure, and in Grant Creek
downstream of the tailrace, following USGS
water temperature monitoring protocols.
NMFS $30,000y $3,000y $4,890
34. As part of the operation compliance monitoring
and reporting plan, monitor water temperature
year-round in Grant Lake near the intake at a
depth of 0.5 meter (RT-1) and in Grant Creek
downstream of the tailrace (ST-2 [GC200]),
following USGS water temperature monitoring
protocols.
Staff $20,000z $2,000z $3,260
35. As part of the Operation Compliance Monitoring
Plan, compare water temperature in Grant Lake
to water temperature at the downstream end of
the Grant Creek bypassed reach upstream of the
tailrace to determine if the average monthly
water temperature difference is no more than
1ºC.
Kenai Hydro $0 $0t $0
36. As part of the streamflow monitoring plan,
compare water temperature in Grant Creek to
water temperature downstream of the tailrace to
ensure the water temperature difference is no
more than 0.5ºC.
Alaska DFG $0 $0t $0
4-15
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
37. As part of the streamflow monitoring plan,
compare water temperature in Grant Creek to
water temperature downstream of the tailrace to
ensure the average monthly water temperature
difference is no more than 1ºC.
FWS $0 $0t $0
38. As part of the operation compliance monitoring
and reporting plan, use monitoring sites ST-2
(GC200) and GLT-1 (at a depth of 0.5 meter) to
compare temperatures in Grant Lake and Grant
Creek and use real-time differences in
temperature as the compliance metric for
comparing Grant Creek and Grant Lake. Modify
intake depths to ensure Grant Creek is within
0.5ºC (+1.0ºC during ice break-up) from Grant
Lake GLT-1 at a depth of 0.5 meter.
Staff $0 $0t $0
39. Develop a water temperature monitoring plan
(NMFS 10(j) 8).
FWS, NMFS,
Alaska DFG
$10,000aa $0aa $630
40. Develop a spill prevention, control, and
containment plan that includes measures to
minimize the potential for hazardous material
spillage and methods for immediate, local
containment if a spill occurs.
Kenai Hydro, $10,000bb $0l $630
4-16
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
41. Develop a hazardous materials containment and
fuel storage plan that includes measures to
contain all hazardous materials used during
construction and operations.
Kenai Hydro $10,000bb $0bb $630
42. Develop a hazardous materials plan that includes
all measures related to hazardous material
storage, spill prevention, and containment. (FWS
10(j) 16, Alaska DFG 10(j) 15, NMFS 10(j) 11)
FWS, Alaska
DFG, NMFS, staff
$10,000k $0l $630
43. Develop a hazardous substances plan. Forest Service $10,000k $0l $0
44. Develop a solid waste and wastewater plan.
(Forest Service 4(e) 19)j
Forest Service,
staff
$10,000k $0l $630
45. Conduct turbidity monitoring upstream from and
100-feet downstream from construction activities
during construction. (Alaska DFG 10(j) 14,
NMFS 10(j) 10)
FWS, Alaska
DFG, NMFS, staff
$0 $9,100cc $9,100
46. Conduct turbidity monitoring downstream of the
tailrace at 15-minute intervals during
construction. (FWS 10(j) 15)
FWS $0 $10,050dd $10,050
47. Implement the Biotic Monitoring Plan for
construction and operation monitoring of
juvenile and adult salmonids during the first year
of construction and during years 2 and 5 of
project operation.
Kenai Hydro $10,000ee $9,640ee $10,270
4-17
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
48. Modify the proposed Biotic Monitoring Plan to
include SMART objectives, and add minnow
trapping in winter and adaptive management
criteria. (FWS 10(j) 9)
FWS $10,000ff $7,560ff $8,190
49. Implement the Biotic Monitoring Plan for
enhancement mitigation in the bypassed reach,
Reach 2/3, and Reach 1, and assess the need for
gravel augmentation.
Kenai Hydro $21,160 $2,970 $4,310
50. Modify the proposed Biotic Monitoring Plan to
continue salmonid investigations and gravel
assessment on 5-year intervals for the life of the
license, include a mechanism for decision-
making and implementation of
recommendations, conduct winter fish studies,
from December through March, identify
overwintering habitats for juveniles, and develop
methodologies for fish presence and abundance
indices. (FWS 10(j) 21)
FWS $0 $940hh $940
51. Develop an aquatic habitat restoration and
monitoring plan. (Forest Service 4(e) 19)j
Forest Service $10,000k $0l $630
52. Develop a fish mitigation and monitoring plan.
(Forest Service 4(e) 19)j
Forest Service $10,000k $0l $630
4-18
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
53. Develop a spawning gravel monitoring plan.
Conduct gravel monitoring in years 1, 10, 15, 20
and 30 of operation, with a report filed with the
Commission after each year of monitoring.
After monitoring in years 20 and 30, if results
indicate a declining trend in spawning gravel,
develop a mitigation plan to include gravel
augmentation or modifications to channel
maintenance flows to meet sediment recruitment
and transport objectives based on monitoring
results.
Staff $5,000ii $1,090ii $1,410
54. Collect 100 tissue samples each from Coho,
sockeye, and pink salmon in year 1 and 2 for
genetic analysis for a total of 600 samples. (FWS
10(j) 20)
FWS $0 $1,460jj $1,460
55. Design the powerhouse tailrace to exclude fish
from entering the powerhouse and to avoid or
minimize the potential for fish injury or
mortality. (FWS 10(j) 7, NMFS 10(j) 7, Alaska
DFG 10(j) 7)
Kenai Hydro,
FWS, NMFS,
Alaska DFG, staff
$0 $0t $0
56. Adhere to timing windows for instream
construction activities and stream crossings.
(FWS 10(j) 10, Alaska DFG 10(j) 9,
NMFS 10(j) 9)
Kenai Hydro,
FWS, Alaska
DFG, NMFS, staff
$0 $0t $0
4-19
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
57. Locate clearings, road corridors, and the
transmission line a minimum of 100 feet away
from the ordinary high water of Grant Creek.
(FWS 10(j) 11, NMFS 10(j) 10, Alaska DFG
10(j) 10)
Kenai Hydro,
FWS, NMFS,
Alaska DFG, staff
$0 $0t $0
Terrestrial Resources
58. Restore areas that have been utilized for
temporary construction and infrastructure
development to “natural” conditions.
Kenai Hydro $0 $0kk $0
59. Implement the Vegetation Management Plan
filed with the amended final license application
that includes minimizing the introduction and
spread of invasive plant species during
construction, conducting invasive plant
management and control, revegetating areas
temporarily disturbed during construction,
maintaining vegetation, performing general
sensitive plant species protection and
monitoring, and conducting pale poppy
population management. (Forest Service 4(e)
19)j
Kenai Hydro,
Forest Service,
staff
$10,580ll $6,240ll $6,910
4-20
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
60. Modify the proposed Vegetation Management
Plan to also include: (1) locating equipment
inspections and/or wash stations well outside of
riparian/aquatic zones; (2) treating aquatic
invasive plants if any are detected in project
waters; (3) monitoring the success of
revegetation efforts monthly between April and
September during construction and annually
thereafter for 5 years; (4) restoration success
criteria, based on existing vegetation conditions;
(5) a description of the data collection and
analysis methods for monitoring that corresponds
with success criteria; (6) monitoring restoration
success and supplement plantings, as needed,
until success criteria are met for two consecutive
growing seasons; (7) conducting pre-
construction surveys for Forest Service sensitive
plants within areas of proposed ground
disturbance; and (8) consulting with the Forest
Service to obtain written approval prior to
pesticide use and prohibit pesticide use on NFS
lands within 500 feet of known locations of
Forest Service special-status or culturally
significant plant populations.
Staff $15,000f $5,000f $5,950
61. Develop a terrestrial and aquatic invasive
management plan. (Forest Service 4(e) 19)j
Forest Service $10,000 k $0l $630
4-21
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
62. Obtain written approval from the Forest Service
prior to use of any pesticide or herbicides on
NFS lands and prohibit pesticide use on NFS
lands within 500 feet of known locations of the
western toad or known locations of Forest
Service special-status or culturally significant
plant populations. (Forest Service 4(e) 14)
Forest Service $0 $0t $0
63. Implement the Final Avian Protection Plan filed
with the amended final license application that
includes migratory birds and bald eagles. (Forest
Service 4(e) 19)j
Kenai Hydro,
FWS, Forest
Service, staff
$10,580ll $9,460ll $10,130
64. Modify the proposed Avian Protection Plan to
also include nest surveys prior to any
construction activities with potential to disturb
nesting birds, not just before vegetation clearing
activities.
Staff $0t $0t $0
65. Develop a bear safety plan. (FWS 10(j) 12,
Alaska DFG 10(j) 11)
Kenai Hydro,
FWS, Alaska
DFG, staff
$1,330f $0f $80
4-22
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
66. Avoid the use of helicopters or airplanes near
mountainsides adjacent to Grant Lake and Grant
Creek. Maintain a 1,500-foot clearance from
mountain goats and follow designated no-fly
zones for mountain goats and sheep in route and
within the project area. (FWS 10(j) 13, Alaska
DFG 10(j) 12)
FWS, Alaska
DFG, Forest
Service, staff
$0 $0t $0
67. Develop a wildlife mitigation and monitoring
plan. (Forest Service 4(e) 19) j
Forest Service $10,000k $0l $630
68. Develop a threatened, endangered, proposed for
listing, and sensitive species plan. (Forest
Service 4(e) 19)j
Forest Service $10,000k $0l $630
Recreation, Land Use, and Aesthetic Resources
69. Re-route the INHT around the project area and
construct the southern portion of the trail from
Vagt Lake to Grant Creek.
Kenai Hydro $146,740 $0 $9,250
70. Develop a plan for INHT access and re-route.
(Forest Service 4(e) 21)
Forest Service $257,170mm $1,460mm $17,670
71. Develop a maintenance and operation plan for
the re-routed trail segment and trail bridge.
(Forest Service 4(e) 19)j
Forest Service $10,000k $0l $630
72. Conduct an INHT re-route workshop of the
project if licensed to allow the powerhouse in the
existing INHT easement. (Park Service 10(a) 1)
Park Service $45,000f $0 $2,840
4-23
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
73. Provide temporary signs to inform the public
about construction activities and include Kenai
Hydro contact information for questions or
concerns that may arise.
Kenai Hydro, Park
Service, staff
$5,000f $0 $320
74. Provide real-time public notification of
construction schedule and access issues via a
website and point of contact. (Park Service 10(a)
3)
Park Service $10,000nn $950nn $1,580
75. Construct a parking area with a single-unit vault
restroom and signage to support non-winter
visitor use on the project access road.
Staff $86,210oo $2,080oo $7,510
76. Develop a public access plan to describe
locations and entities responsible for installing
and maintaining infrastructure such as gate(s),
parking area, restroom, and signs to manage
public access in the vicinity of the project access
road between Seward Highway and Grant Lake.
Staff $7,000pp $810pp $1,250
77. Restrict public access to project infrastructure by
signing and gating/fencing the access road to
address local residents’ concerns about
encouraging motorized use near the project and
reduce the potential for unauthorized motorized
use on adjacent NFS lands.
Kenai Hydro, staff $8,500f $700f $1,240
4-24
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
78. Develop a fire prevention plan. (Forest Service
4(e) 19)j
Kenai Hydro,
Forest Service,
staff
$5,290 $5,290 $5,620
79. Minimize effects of project facilities on visual
resources and light pollution.
Park Service, staff $1,000f $0 $60
80. Develop a scenery management plan. (Forest
Service 4(e) 19)j
Forest Service,
staff
$10,000k $0l $630
Cultural Resources
81. Implement the final HPMP filed with the
amended final license application.
Kenai Hydro $10,580 $1,080 $1,750
4-25
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
82. Implement a revised HPMP that includes the
following: (1) identification of specific Native
organizations that will be consulted and how they
will be involved; (2) addition of Mark Luttrell as
a consulting party; (3) discussion of the methods
used to conduct the TCP study, which Native
organizations were consulted, and the results of
such consultation, and conditions under with they
would continue to be consulted; (4) clarification of
survey of the proposed transmission line west of
the Seward Highway to its interconnection; (5)
schedule for completion of all HPMP measures;
(6) detailed monitoring plan to monitor identified
sites; (7) implementation of active management/
mitigation measures if warranted; (8) provision to
formally evaluate and assess project effects on
submerged cultural resources should they be
exposed in the future; and (9) appendix containing
documentation and copies of all section 106
consultation throughout the licensing process,
including Alaska SHPO concurrence on the APE
and HPMP measures (including the use of
monitoring and installation of interpretive signs as
mitigation measures), and an appendix that details
the extent to which each comment received on the
HPMP is addressed in the revised plan.
Staff, Alaska
SHPO, Forest
Service
$15,580f $5,000f $5,980
4-26
Enhancement/Mitigation Measures Entities
Capital
(2018$)a, b
Annual Cost
(2018$)a, c
Levelized
Annual Cost
(2018$)
83. Develop a heritage resource protection plan.
(Forest Service 4(e) 19) j
Forest Service $10,000k $0l $630
a Kenai Hydro provided the cost in its January 16, 2018, amended final license application unless otherwise noted.
b Capital costs typically include equipment, construction, permitting, and contingency costs.
c Annual costs typically include O&M costs and any other costs that occur on a yearly basis.
d Staff estimates the cost to be $50,000 per year in years 1 through 4.
e Staff estimates a cost of $5,000 per year in years 1 through 9 (4 years of construction and 5 years of operation).
f Cost estimated by staff.
g Staff estimated the costs to develop and implement the plan and removed them from the overall construction cost and
annual O&M cost, respectively, to enable us to compare similar agency and staff measures. The annual cost was based
on an estimate of $20,000 per year in years 1 through 4.
h Staff estimated the cost to develop the plan and $25,000 per year in years 1 through 4 for implementation.
i Staff estimated the cost to develop the plan and $30,000 per year in years 1 through 4 for implementation.
j The Forest Service details for the plan in their comments in response to the REA notice, although they only requested a
plan be developed under Forest Service 4(e) condition 19. Staff estimated the cost to develop and implement the plan
based on the details in their comments.
k The Forest Service did not provide any details for the plan its 4(e) condition 19, so staff only estimated a cost to develop
the plan.
l A cost to implement the plan cannot be estimated until the plan is completed.
m If adequate flows are available without needing to divert flows from the powerhouse, there would be no lost energy to
implement the measure. If not, powerhouse operation may need to reduce or stop to ensure adequate flows. The worst
case scenario would be a loss of 40 MWh (5 MW times 8 hours) in each year that generation would be lost.
4-27
n The flow enhancements are proposed to be provided as part of the normal operation of the project, so we assume no
effect on the proposed annual generation.
o There would be no additional cost for this measure because the monitoring devices are included elsewhere.
p Staff estimated the costs to develop and implement the plan and removed them from the overall construction cost and
annual O&M cost, respectively, to allow comparison with similar agency and staff measures. The annual cost was based
on an estimate of $30,000 per year in years 1 through 4.
q Kenai Hydro stated the cost is included in the overall construction cost.
r Staff estimated the capital and annual O&M cost for one flow gage and removed them from the overall construction cost
and annual O&M cost, respectively, to show the estimated cost of the measure.
s Staff estimated the capital and annual O&M cost for two flow gages and removed them from the overall construction
cost and annual O&M cost, respectively, to show the estimated cost of the measure.
t Staff estimates there would be no additional cost to implement this measure.
u The capital cost to allow variable depth withdrawal is included in the overall construction cost and the operation of the
gates is included in the overall O&M cost for the project.
v Staff estimated the cost to develop the proposed plan and removed it from the overall capital cost of the project to enable
us to compare to the staff-recommended plan. The implementation cost of the plan is covered under the individual
proposed minimum flow and water temperature monitoring measures.
w Staff estimated the cost to develop the plan; the cost of implementation would be covered under the individual measures
to monitor flows are designated locations.
x Staff estimated the capital and annual O&M cost for four temperature monitoring locations and removed them from the
overall construction cost and annual O&M cost, respectively, to allow comparison with similar agency and staff
measures.
y Staff estimated the capital and annual O&M cost for three temperature monitoring locations and removed them from the
overall construction cost and annual O&M cost, respectively, to allow comparison with similar agency and staff
measures.
4-28
z Staff estimated the capital and annual O&M cost for two temperature monitoring locations and removed them from the
overall construction cost and annual O&M cost, respectively, to allow comparison with similar agency and staff
measures.
aa Staff estimated the cost to develop the plan; the cost to implement the plan is included in the agency water temperature
monitoring measure.
bb Staff estimated the capital cost to develop the plan and removed it from the overall construction cost, to show the
estimated cost of the measure.
cc Staff estimates the cost to implement the measure to be $48,000 per year in years 1 through 4.
dd Staff estimates the cost to implement the measure to be $53,000 per year in years 1 through 4.
ee Staff estimated the cost of the plan and estimates annual costs of $60,000 in year 1, and $75,000 in years 6 and 9 to
implement the measure.
ff Staff estimates the cost to be $20,000 per year in years 1-5, 10, 15, 20, 25, and 30.
gg Staff estimates the cost would be $50,000 per year in years 1-5, 10, 15, 20, 25, and 30.
hh Staff estimates the cost would be $5,000 per year in years 5, 10, 15, 20, 25, and 30.
ii Staff estimates a capital cost of $5,000 to develop the plan; $5,000 per year for sampling in years 1, 10, 15, 20, and 30;
and $5,000 in years 20 and 30 for trend analysis. Prepare a report after each sampling year.
jj Staff estimates the annual cost would be $15,000 in years 1 and 2.
kk The cost to implement this measure is included in the cost of the vegetation management plan.
ll Staff estimated the capital cost to develop the plan and removed it from the overall construction cost, to show the
estimated cost of the measure. Kenai Hydro provided the annual cost.
mm The capital cost includes: $30,000 for a plan in year 1 (staff); $0 for easements (cost cannot be estimated); $15,000 to
finalize the plan in year 2 (staff); and $212,170 to construct for the trail re-route and bridge (Kenai Hydro). The annual
cost would be $1,460 for maintenance of the trail (Kenai Hydro) and bridge.
nn Staff estimates a capital cost of $10,000 to develop the website and $5,000 per year in years 1 through 4 to update the
plan as needed.
4-29
oo Staff estimates a capital cost of $88,800 in year 2 to construct a parking area with a gravel compacted surface with
vehicle barriers ($15,000); one information board ($2,000); approximately seven directional/regulatory signs ($2,800)
and one single vault restroom ($69,000), and annual cost of $2,300 for O&M of these facilities.
pp Staff estimates a capital cost of $7,000 in year 1 to develop the initial plan and $5,000 per year to periodically review
and revise the plan in years 6, 11, 16, 21, and 26.
5-1
5.0 CONCLUSIONS AND RECOMMENDATIONS
5.1 COMPREHENSIVE DEVELOPMENT AND RECOMMENDED
ALTERNATIVE
Sections 4(e) and 10(a)(1) of the FPA require the Commission to give equal
consideration to the power development purposes and to the purposes of energy
conservation; the protection of, mitigation of damage to, and enhancement of fish and
wildlife; the protection of recreational opportunities; and the preservation of other
aspects of environmental quality. Any license issued shall be such as in the
Commission’s judgment will be best adapted to a comprehensive plan for improving or
developing a waterway or waterways for all beneficial public uses. This section
contains the basis for, and a summary of, our recommendations for licensing the Grant
Lake Project. We weigh the costs and benefits of our recommended alternative against
other proposed measures.
Based on our independent review of agency and public comments filed on this
project and our review of the environmental and economic effects of the proposed
project and its alternatives, we selected the staff alternative, as the preferred option. We
recommend this option because: (1) issuance of an original hydropower license by the
Commission would allow Kenai Hydro to operate the project as an economically
beneficial and dependable source of electrical energy for its customers; (2) the 5 MW of
electric capacity comes from a renewable resource that does not contribute to
atmospheric pollution; (3) the public benefits of this alternative would exceed those of
the no-action alternative; and (4) the recommended measures would protect and
enhance fish and wildlife resources, and would provide improved recreation
opportunities at the project.
In the following section, we make recommendations as to which environmental
measures proposed by Kenai Hydro or recommended by agencies and other entities
should be included in any license issued for the project. In addition to Kenai Hydro’s
proposed environmental measures, we recommend additional staff-recommended
environmental measures to be included in any license issued for the project. We also
discuss which measures we do not recommend including in the license.
5.1.1 Measures Proposed by Kenai Hydro
Based on our environmental analysis of Kenai Hydro’s proposal discussed in
section 3 and the costs discussed in section 4, we recommend including the following
environmental measures proposed by Kenai Hydro in any license issued for the project.
Our recommended modifications to Kenai Hydro’s proposed measure are shown in bold
italic type face, and parts of measures we do not recommend are shown in strikeout.
5-2
Project Construction
• Designate a third-party ECM with authority to stop work as needed to
oversee construction activities and ensure compliance with measures to
protect natural resources.
• Develop an ESCP that includes BMPs to prevent sediment mobilized during
construction from entering Grant Creek or Grant Lake and includes: (1) a
description of existing soil, groundwater, and vegetation conditions; (2)
site-specific preventive measures; (3) identification of areas for storage or
deposition of overburden, and implementation of erosion control measures
in those areas; (4) measures to sample for lead in Grant Lake sediments
that could be disturbed by project construction and operation, and, if lead is
present, measures to prevent mobilization; and (5) an implementation
schedule.
• Restore areas disturbed by construction to pre-existing conditions.
• Consult with Alaska DFG, NMFS, and FWS to finalize design details for fish
exclusion measures in the tailrace.
• Consult with Alaska DFG’s habitat biologist to establish timing windows for
instream construction and stream-crossing activities.
• Develop a bear safety plan that includes: (1) keeping construction sites and
refuse areas clear of substances that attract bears, (2) installing bear-proof
garbage receptacles and other measures during construction and operation to
prevent bears from obtaining food or garbage, (3) minimizing possible
conflicts with bears during construction and operation, (4) establishing
protocols for dealing with problem bears,75 and (5) notifying authorities of
any bear-human conflict.
Project Operation
• Combine the proposed hazardous materials containment/fuel storage plan
and spill prevention control and containment plan into a single hazardous
materials plan that includes the following measures to be implemented
during project construction and operation: (1) designation of specific areas
to maintain and refuel vehicles and equipment, (2) measures for
containment and cleanup in the event of a spill or accident, (3) provisions
to remove oil and other contaminants from condensate and leakage from
75 Although the agencies do not specifically define problem bears, we understand
this term to refer to bears that repeatedly visit a construction area despite
implementation of other measures in the plan, including trash management and use of
bear-proof containers.
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the turbines and other equipment in the powerhouse, and (4) a reporting
schedule.
• Provide the following minimum flows in the bypassed reach: 5 cfs from
January 1 through July 31, 10 cfs from August 1 through September 31, 7 cfs
from October 1 through October 31, and 6 cfs from November 1 through
December 31 to protect aquatic habitat and support benthic
macroinvertebrates.
• Provide the following instantaneous minimum flows downstream of the
tailrace: 60 cfs from January 1 through May 15, 80 cfs from May 16 through
May 31, 150 cfs from June 1 through June 30, 195 cfs from July 1 through
September 1, 150 from September 1 through September 30, 125 cfs from
October 1 through October 15, 72 cfs from October 16 through November 15,
and 60 cfs from November 16 through December 31 to protect habitat for
salmonids and benthic macroinvertebrates.
• Use variable depth withdrawals from the project intake and adjust on a real-
time basis to maintain Grant Creek temperature targets 76 established by
real-time water temperature monitoring of Grant Lake (at a depth of 0.5
meter).
• Provide channel maintenance flows of 800 cfs to the Grant Creek bypassed
reach for a continuous 8-hour duration, once per year, for a minimum of 2
years in each moving 10-year period to promote sediment recruitment and
transport from the bypassed reach to Grant Creek.
• Limit upramping rates to 1 inch per hour during the winter (November 16
through May 15) and 2 inches per hour during the summer (May 16 through
November 15). Limit downramping rates to a year-round maximum of 1
inch per hour (when operational control exists).
• Develop an operation compliance monitoring and reporting plan which
includes: (1) real-time water surface elevation monitoring level and real-
time temperature monitoring in Grant Lake near the intake at a depth of 0.5
meter; (2) real-time flow and temperature monitoring in Grant Creek
bypassed reach; (3) real-time flow and temperature monitoring in Grant
Creek tailrace downstream of the tailrace at ST-2 (GC200); (4) provisions to
minimize effects of equipment malfunction on Grant Creek water
temperature;; (5) a schedule for installing, maintaining, and collecting flow
76 Staff-recommended temperature targets for Grant Creek are GLTS ± 0.5ºC
(GLTS+1ºC during ice out).
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and temperature instrumentation; and (6) reporting of Grant Creek water
temperatures and Grant Lake elevations
• Implement the Vegetation Management Plan filed on January 16, 2018, that
includes: (1) non-native, invasive plant management and control; (2)
revegetation; (3) vegetation maintenance; (4) sensitive plant species
protection and monitoring; and (5) pale poppy population management.
Modify the plan to also include measures to: (1) locate equipment
inspections and/or wash stations well outside of riparian/aquatic zones; (2)
treat aquatic invasive plants if any are detected in project waters;
(3) monitor the success of revegetation efforts monthly between April and
September during construction and annually thereafter for 5 years;
(4) develop restoration success criteria, based on existing conditions, to
determine whether revegetation efforts are successful; (5) develop data
collection and analysis methods for monitoring that correspond with
success criteria; (6) monitor restoration success and supplemental
plantings, as needed, until success criteria are met for two consecutive
growing seasons; (7) conduct pre-construction surveys for Forest Service
sensitive plant species within areas of proposed ground and vegetation
disturbance and consult with the Forest Service if needed to minimize
effects on newly identified populations; and (8) obtain written approval
from the Forest Service prior to using herbicides or pesticides on NFS
lands.
• Implement components of the Avian Protection Plan that address effects
of project operation on migratory species and bald eagles and minimizes
potential for electrocutions or collisions with the project transmission line.
Modify the proposed Avian Protection Plan to include nest surveys prior
to any construction activities that have the potential to disturb nesting
birds, not just before vegetation clearing activities.
• Develop a fire prevention plan.
• Modify the HPMP to include: (1) identification of the specific Native
organizations that will be consulted and how they will be involved;
(2) addition of Mark Luttrell as a consulting party; (3) discussion of the
methods used to conduct the TCP study, which Native organizations were
consulted; results of such consultation; and conditions under which Native
organizations would continue to be consulted in the future; (4) clarification
regarding the survey status of the section of the proposed transmission line
extending west from where it crosses the Seward Highway to its
interconnection with the main power distribution line; (5) a specific
schedule for completion of all HPMP measures; (6) a monitoring plan that
specifies the circumstances under which monitoring would occur, the party
responsible for conducting the monitoring, how frequently regular
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monitoring would occur, and how monitoring results would be
disseminated and used; (7) specific factors that would trigger
implementation of more active management/mitigation measures over
periodic monitoring; (8) a provision to formally evaluate and assess project
effects on submerged cultural resources if they are exposed in the future;
and (9) documentation and copies of all section 106 consultation
throughout the licensing process, including documentation of Alaska
SHPO concurrence on the project APE and concurrence with all measures
contained within the HPMP (including the use of monitoring and
installation of interpretive signs as mitigation measures), and an appendix
that details the extent to which each comment received on the HPMP is
addressed in the revised plan.
5.1.2 Additional Measures Recommended by Staff
In addition to Kenai Hydro’s proposed measures listed above, we recommend
including the following staff-recommended measures in any license issued for the Grant
Lake Project:
Project Construction
• Develop a construction plan that includes: (1) a detailed construction schedule;
(2) a description of construction methods and BMPs to be employed and
measures to reduce the risk of introduction or spread of invasive plants;
(3) requirements to delineate construction areas using fencing and/or flagging;
(4) identification of measures to avoid streams, wetlands, and pond habitats to
the extent possible during construction; (5) provisions for environmental training
of construction staff regarding laws, regulations, and BMPs to avoid or reduce
effects on native plant and wildlife species including special-status species and
their habitats; and (6) identification of other resource-specific protection plans
that should be considered during construction activities.
• Develop a spoils disposal plan includes: (1) means and methods to dispose of
any materials excavated during construction, (2) mapped locations of any
proposed temporary and/or permanent spoil pile locations, (3) descriptions of the
composition of any materials expected to be excavated on the site, (4) proposed
use of excavated materials in the construction process, (5) any plans to dispose of
materials offsite, (6) methods to prevent spoil materials from leaching from spoil
piles into adjacent waterways and wetlands, and (7) identification of other
resource-specific protection plans that should be considered during construction
activities.
• Avoid the use of helicopters or airplanes near the mountainside adjacent to Grant
Lake and Grant Creek to protect mountain goats. Follow designated no-fly zones
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for mountain goats and sheep in route and within the project area and maintain a
1,500-foot clearance between aircraft and mountain goat habitat.
Project Operation
• Develop a solid waste and wastewater plan to protect water quality in Grant
Creek from waste and sewage generated on site.
• Adjust intake withdrawal depth on a real-time basis based on the real-time Grant
Creek and Grant Lake temperature monitoring to ensure Grant Creek temperature
below the tailrace meets the following: (1) for the 30-day period when Grant
Lake is going through its ice break-up, Grant Creek temperature be maintained at
the temperature recorded in Grant Lake at a depth of 0.5 meter + 1.0°C (+/-
0.5°C); (2) once the spring turnover is complete and Grant Lake is ice-free, Grant
Creek temperatures remain within +/- 0.5°C of Grant Lake temperature measured
at a 0.5 meter depth, and (3) the same +/- 0.5°C criterion be maintained when
Grant Lake is ice-covered.
• Develop and implement a salmonid spawning gravel monitoring plan, that
includes: (1) methods to assess the distribution and abundance of salmonid
spawning gravel; (2) spawning gravel assessments in years 1, 10, 15, 20, and 30;
and (3) a trend analysis in years 20 and 30 to determine the rate of any spawning
gravel reduction and appropriate measures to address any reduction in spawning
gravel recruitment; and (4) reporting schedule to include reports after each
sampling year.
• Develop a scenery management plan to minimize views of project facilities from
the INHT and direct security lighting toward the ground to limit effects of light
pollution.
• Install a gate and construct a parking area with a single-unit vault restroom on the
project access road, east of the Seward Highway and railroad corridor and west
of the access road bridge over Trail Lake Narrows to support non-winter visitor
use of the project access road.
• Develop a public access plan to describe locations of and entities responsible for
installing and maintaining infrastructure such as gate(s), parking area, restroom,
signs to manage public access in the vicinity of the project access road between
Seward Highway and Grant Lake.
The following section presents the basis for our recommended measures and our
recommended modifications to the proposed measures.
Environmental Compliance Monitor
Kenai Hydro , consistent with the Forest Service (final 4(e) condition 20),
proposes to provide an onsite, third-party ECM during all phases of construction to
ensure adherence to all applicable BMPs and methods outlined in the monitoring and
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management plans. The ECM would manage all activities associated with
implementing BMPs and the monitoring and management plans. Staff’s modification,
pursuant to final 4(e) condition 20, would ensure the ECM has the authority to stop
work in the field to protect environmental resources, if need be; the ECM would act as a
liaison with the Forest Service.
As discussed in section 3.3.2.2, in the Effects of Project Construction on Water
Quality and Construction Effects on Fisheries Resources subsections, and in section
3.3.3.2, in the Effects of Project Construction and Operation on Avian Communities
subsection, an onsite ECM would be able to assess the effectiveness of BMPs put in
place to protect water quality, fish habitat, and nesting birds during construction.
However, if construction activities continue despite observations of spills or erosion,
these activities could exacerbate effects on water quality and fishery resources.
Similarly, if vegetation-clearing activities encroach on buffers designated to protect
nesting birds, these species could be injured, or their nests destroyed. Given the remote
nature of the project, having an ECM on site to monitor project construction activities
and ensure measures effectively protect environmental resources is appropriate.
Ensuring the ECM has authority to stop work as the Forest Service specifies, would
enable the ECM to stop construction activities to prevent further contamination.
Therefore, we recommend Kenai Hydro provide an ECM during construction
activities and grant the ECM the authority to stop work when needed to protect natural
resources from effects of construction activities. We estimate the cost of this measure
to be $9,480, and the benefits to the environmental resources would be worth the cost.
Erosion and Sediment Control Plan
Consistent with the Forest Service final 4(e) condition 19, Kenai Hydro proposes
to develop and implement an ESCP within 1 year of license issuance. This plan would
include measures to minimize erosion and sediment deposition during construction.
Alaska DFG (10(j) recommendation 13) and FWS (10(j) recommendation 14)
recommend that the plan include: (1) soil, groundwater, and vegetation conditions;
(2) site-specific preventive measures; (3) identification of areas for storage or deposition
of overburden and erosion control to be used in those areas; (4) prescriptions for
revegetation of all disturbed areas, including location of treatment areas, plant species
and methods to be used; and (5) an implementation schedule. The agencies also
recommend that Kenai Hydro prepare the plan after consultation with the Forest
Service, Alaska DFG (Alaska DFG recommendation), FWS, and other requesting
agencies.
As discussed in section 3.3.1.2, in the subsection Construction Effects on
Geology and Soils, the Forest Service, in the comments section of its letter filed in
response to the Commission’s Ready for Analysis notice, recommends the ESCP use
site-specific measures to control erosion, stream sedimentation, dust, and soil mass
movement consistent with USDA guidance.
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As discussed in section 3.3.1.2, in the subsection Construction Effects on
Geology and Soils, an ESCP is needed to protect water quality and aquatic resources
during construction. Implementing the agency recommendations would provide for
site-specific measures to prevent erosion of terrestrial habitats and the sedimentation
and subsequent degradation of aquatic habitat during construction activities.
Therefore, we recommend Kenai Hydro develop the ESCP, consistent with
Forest Service condition 19 and recommendations of Alaska DFG, FWS, NMFS, in
consultation with NMFS, FWS, Forest Service, and Alaska DFG. However, we note
that Alaska DFG’s and FWS’s recommended provision for the revegetation of all
disturbed areas would be included in the Vegetation Management Plan discussed below
rather than the ESCP.
We estimate that the levelized annual cost of developing an ESCP would be
$6,950, and the benefits to aquatic and terrestrial resources would be worth the cost.
Lead Sampling and Analysis
As discussed in section 3.3.2.1, in the Water Quality Sampling subsection, Kenai
Hydro found lead concentrations in water that exceeded the freshwater chronic standard
in Grant Lake and Grant Creek. While the source(s) are unknown, these values suggest
that activities that disturb lake sediments, either through excavation, or, operationally, in
response to increased water velocities near the intake, could potentially mobilize
sediment-bound lead, resulting in downstream transport. Therefore, we recommend
Kenai Hydro, in consultation with Alaska DFG, FWS, ADEC, and the U.S. Army Corps
of Engineers, modify the ESCP to include: (1) pre-construction sediment sampling for
lead in Grant Lake where construction or operation could disturb sediments, and (2)
measures to prevent sediment-bound lead, if present above screening values (see below)
from being mobilized during construction or operation and entering Grant Lake or Grant
Creek. The modified ESCP would describe pre-construction sediment sampling in
Grant Lake, including:
• Definition of the project’s zone of influence (the area of the lake bed
where construction or operational activities would disturb sediments, e.g.,
excavation within the cofferdam to construct the project intake and outlet
weir and areas where water currents associated with project operation
could mobilize sediment near the intake).
• Use of the U.S. Army Corps of Engineers screening values for lead in
sediment, developed through the Sediment Evaluation Framework (SEF)
for the Pacific Northwest (Northwest Regional Sediment Evaluation
Team, 2018). SL1, corresponding to a concentration below which adverse
effects to benthic communities would not be expected, is 360 mg/kg, and
SL2, above which more than minor adverse effects may be observed in
benthic organisms, is >1300 mg/kg.
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• Field equipment, methods, and plan for sampling particle size and lead
concentration in Grant Lake sediments following the Sediment Evaluation
Framework (SEF) for the Pacific Northwest (Northwest Regional
Sediment Evaluation Team, 2018).
• Reporting to FERC and regulatory agencies.
Lead concentration results would guide the next step:
• If sediment lead concentrations are below 1300 mg/kg screening level:
construction would proceed as planned.
• If sediment lead concentrations are greater than 1300 mg/kg screening
level: Kenai Hydro should develop a plan to delineate the construction
area and the operational zone of influence in which project construction
and operation may disturb Grant Lake sediments.77 The plan should
consider measures to prevent the resuspension and transport of lead from
sediments to the water column; such as, those methods described in
Contaminated Sediment Remediation Guidance for Hazardous Waste
Sites (EPA, 2005)).
We estimate that the levelized annual cost of modifying the ESCP to include lead
sampling as recommended by staff, would be $1,260, and the benefits to water quality
and benthic communities would be worth the cost.
Hazardous Materials Plan
Consistent with Forest Service final 4(e) condition 19, Kenai Hydro proposes to
develop a hazardous materials containment/fuel storage plan and a spill prevention,
control, and containment plan, to reduce potential for accidental spill of hazardous
materials into project waters. Although Kenai Hydro proposes to develop the two plans
in consultation with stakeholders, it does not provide any specific details for the plans.
Alaska DFG (10(j) recommendation 15) and FWS (10(j) recommendation 16)
recommend that Kenai Hydro combine the two plans into a single comprehensive plan.
FWS also recommends that the plan: (1) designate specific areas for vehicle and
equipment fueling and maintenance, (2) include measures for spill containment and
cleanup, and (3) remove oil and contaminants from turbine condensate and leakage and
other equipment in the powerhouse.
Based on the analysis in section 3.3.2.2, in the Effects of Construction on Water
Quality subsection, we find use of hazardous materials in the project area would create
77 To determine the operational zone of influence the plan should include a
hydrodynamic analysis to evaluate how water velocities near the intake may influence
and entrain sediment-bound lead from the lake bottom.
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potential for inadvertent spill of these materials into waterways. Developing a
hazardous materials plan, with provisions recommended by FWS, would better describe
proposed measures and strengthen the proposed plan to minimize potential effects on
water quality. In addition, we find that including an element for reporting observations
of oily sheens and turbidity plumes on surface waters would document fuel and oil spills
and identify any need for additional containment measures. Combining fuel storage,
spill prevention/control, and containment into a single plan would simplify agency
consultation, the Commission’s plan approval process, and compliance reporting.
Therefore, we recommend Kenai Hydro develop, in consultation with Alaska
DFG, FWS, and the Forest Service, a hazardous materials plan that includes:
(1) specific areas for the maintenance and refueling of vehicles and equipment,
(2) contingencies with appropriate measures for containment and cleanup in the event of
a spill or accident, (3) provisions to remove oil and other contaminants from condensate
and leakage from the turbines and other equipment in the powerhouse, and (4) reporting
requirements. We estimate that the levelized annual cost of developing the plan, as
recommended by staff, would be $630, and the benefits to aquatic resources would be
worth the cost.
Project Construction Plan
Forest Service final 4(e) condition 19 specifies that Kenai Hydro develop a
project construction plan. However, the Forest Service does not provide any detail as to
what the plan should include.
Kenai Hydro proposes several plans that include measures to prevent effects of
construction activities on natural resources. These include the development of an
ESCP, stormwater pollution prevention plan, and hazardous materials containment/fuels
storage plan; and the implementation of its proposed Vegetation Management Plan and
Avian Protection Plan. Additionally, Kenai Hydro proposes to consult with Alaska
DFG to identify timing restrictions for construction in Grant Creek and to consult with
Alaska DFG, FWS, and NMFS for final design of the tailrace fish screen.
As discussed in section 3.3.3.2, in the Effects of Project Construction on
Vegetation Communities subsection, implementation of Kenai Hydro’s proposed plans
with our recommended modifications would identify locations for protection measures,
including silt fence, runoff control, control of invasive plant species, and buffer areas to
protect sensitive plant species and nesting birds, that Kenai Hydro would use during
construction activities to protect sensitive resources. However, it is unclear how Kenai
Hydro would identify potential conflicts among the plans. For example, the ESCP
could include placement of silt fence in an area identified as occupied nesting habitat
through implementation of the Avian Protection Plan. Developing a construction plan,
as the Forest Service specifies, would consolidate proposed site-specific location and
design information for protection measures into a set of maps and drawings that would
facilitate agency consultation and communication with contractors.
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Additionally, as discussed in section 3.3.4.3, in the Land and Resource
Management subsection, Kenai Hydro’s proposed iterative process for preparing and
securing agency design approval would provide information about project construction.
However, a separate plan that synthesizes schedules, construction locations and
activities, and access restrictions would demonstrate whether any conflicting uses may
occur. Implementing this plan would provide for public safety during construction by
identifying locations when and where public use should be excluded and ensure the
Forest Service has adequate information to continue managing public use of the NFS
lands. As discussed in section 3.3.6.2, Project-related Effects on Cultural Resources,
Kenai Hydro also must consult further with Native organizations to find out whether
culturally significant plants could be affected by project construction. A project
construction plan would afford Native organizations with the opportunity to conduct
surveys, and record and collect any culturally significant plants within construction
areas prior to ground-disturbing activities.
Developing this plan in consultation with FWS, NMFS, the Forest Service,
Alaska DFG, and Alaska DNR would allow the agencies to suggest measures Kenai
Hydro could implement to manage public access to public lands during construction and
protect natural resources.
Therefore, we recommend Kenai Hydro develop, in consultation with FWS,
NMFS, the Forest Service, Alaska DFG, and Alaska DNR, a construction plan that
integrates the components of the ESCP, Vegetation Management Plan, Avian Protection
Plan, stormwater pollution prevention plan, and hazardous materials plan and spoils
disposal plan and includes: (1) a detailed construction schedule; (2) a description of
construction methods and BMPs to be employed, including identification of measures to
reduce the risk of introduction or spread of invasive plants; (3) requirements to delineate
construction areas using fencing and/or flagging; (4) identification of measures to avoid
streams, wetlands, and pond habitats to the extent possible during construction; (5)
provisions for environmental training of construction staff regarding laws, regulations,
and BMPs to avoid or reduce effects on native plant and wildlife species including
special-status species and their habitats; and (6) identification of other resource-specific
protection plans that should be considered during construction activities.
We estimate that the levelized annual cost of developing a project construction
plan would be $630, and the benefits to aquatic and terrestrial resources would be worth
the cost.
Spoils Disposal Plan
Kenai Hydro proposes to re-use excavated materials as part of project
construction, such as crushing excavated rock for road surfaces and using top soil to
restore disturbed areas for revegetation.
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Forest Service final 4(e) condition 19 specifies that Kenai Hydro develop a spoils
disposal plan. However, the Forest Service does not provide any additional details
about what the plan should include.
We anticipate spoil materials would be stockpiled onsite, but it is not clear where
stockpiles would be located. The analysis in section 3.3.1.2, in the Construction Effects
on Geology and Soils subsection, indicates that a spoils disposal plan would provide
additional information to guide construction activities and ensure protection of
environmental resources, including water quality, and botanical and wildlife resources.
Therefore, we recommend that Kenai Hydro develop, in consultation with the Forest
Service, FWS, NMFS, Alaska DFG, and Alaska DNR, a spoils disposal plan that
includes: (1) means and methods used to dispose of any materials excavated during
construction, (2) mapped locations of any proposed temporary and/or permanent spoil
pile locations, (3) descriptions of the material composition of any materials expected to
be excavated onsite and appropriate uses of such materials for construction,
(4) proposed use of excavated materials in the construction process, (5) any plans to
dispose of materials offsite, (6) methods to be employed to prevent spoil materials from
leaching from spoil piles into adjacent waterways and wetlands, and (7) identification of
other resource-specific protection plans that should be considered during construction
activities.
We estimate that the levelized annual cost of developing a spoils disposal plan
would be $630, and the benefits to aquatic and terrestrial resources would be worth
the cost.
Solid Waste and Wastewater Plan
Kenai Hydro proposes to construct a sanitary wastewater holding tank or septic
system to ensure solid waste and wastewater from the project do not affect water quality
in Grant Creek. Forest Service 4(e) condition 19 specifies Kenai Hydro prepare a solid
waste and wastewater plan; however, the Forest Service does not provide any specifics
as to what measures the plan would include.
Based on the analysis in section 3.3.2.2, in the Effects of Project Operation on
Water Quality subsection, Kenai Hydro’s proposed construction of a sanitary waste
holding tank or septic system would likely prevent wastewater from entering Grant
Creek. However, consulting with the Forest Service and Alaska DFG on the specific
location and design of these facilities would ensure that they are effective and
appropriately designed for site-specific conditions and further reduce potential effects
on water quality. Therefore, we recommend Kenai Hydro develop, in consultation with
the Forest Service and Alaska DFG, a solid waste and wastewater plan. We estimate
that the levelized annual cost of the plan would be $630, and the benefits to aquatic and
fisheries resources would be worth the cost.
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Turbidity Monitoring
FWS (10(j) recommendation 15) and Alaska DFG (10(j) recommendation 14)
recommend that Kenai Hydro monitor turbidity both upstream and downstream of all
construction activities and/or discharge points for overland flows that cross construction
areas and discharge into Grant Creek. Both FWS and Alaska DFG recommend that if
turbidity 100 feet downstream of the construction area exceeds Alaska water quality
standards (25 NTU above natural conditions) (see table 3-5), then Kenai Hydro, per the
ESCP to be developed, would cease construction activities, locate sediment sources, and
implement appropriate sediment control measures. Additionally, FWS recommends
Kenai Hydro monitor turbidity at 15-minute intervals downstream of the tailrace at gage
location ST-2 (GC200). In its response to agency comments Kenai Hydro states that it
would comply with these conditions if incorporated into the license order but did not
modify its proposal to include turbidity monitoring.
As discussed in section 3.3.1.2, in the Construction Effects on Geology and Soils
subsection, and in section 3.3.2.2, in the Effects of Project Construction on Water
Quality subsection, construction activities would result in ground disturbance that could
increase erosion potential and affect water turbidity levels. Implementation of Kenai
Hydro’s proposed ESCP with our recommended modifications would reduce the
potential for sediment to enter project waters. However, monitoring is needed to ensure
measures implemented as part of the plan are effective throughout the construction
period. State monitoring standards require monitoring turbidity upstream of the work
area as a control and monitoring turbidity 100 feet downstream of the construction area
to identify increases in sedimentation. Such monitoring would alert the ECM that
additional measures are required. Stopping construction activities, identifying the
source of sediment, and implementing appropriate control measures would minimize
any project-related effects of sedimentation on water quality and aquatic resources and
ensure that they are timely addressed. As discussed in section 3.3.2.2, in the Effects of
Project Construction on Water Quality subsection, we find localized monitoring would
readily identify and address erosion containment issues if turbidity levels exceed those
stipulated by current Alaska DEC standards (see table 3-5). Therefore, we recommend
that Kenai Hydro conduct turbidity monitoring upstream and downstream of all
construction activities and/or discharge points for overland flows that cross construction
areas and discharge into Grant Creek. However, we conclude that additional monitoring
at the ST-2 (GC200) stream gage location, as FWS recommends, would not provide
additional benefit to water quality.
We estimate that the levelized annual cost of turbidity monitoring would be
$9,100, and the benefits to water quality protection and aquatic resources would be
worth the cost.
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Ramping Rates
Alaska DFG (10(j) recommendation 3), FWS (10(j) recommendation 3), and
NMFS (10(j) recommendation 3) each recommend that Kenai Hydro operate the
proposed project to avoid sudden changes (either increases or decreases) in the flow in
Grant Creek. The agencies recommend Kenai Hydro limit downramping rates to a
maximum of 1 inch per hour (when operational control exists) and limit upramping
rates to 1 inch per hour during the winter (November 16 through May 15) and 2 inches
per hour during the summer (May 16 through November 15). Additionally, Alaska
DFG (10(j) recommendation 5) recommends Kenai Hydro install and maintain a gage
downstream of the project tailrace (ST-2 [GC200]) as the compliance point for ramping
rates. As discussed below in Water Temperature in Grant Creek, Kenai Hydro would
also use this gage to monitor temperature.
In its reply comments, Kenai Hydro agrees to implement the agencies’
recommended upramping rates but proposes alternative downramping rates of a
maximum of 2.25 inches per hour from May 16 through November 15. For the
remainder of the year, Kenai Hydro agrees to limit downramping rates to 1 inch per
hour, consistent with the Alaska DFG, FWS, and NMFS recommendations. Kenai
Hydro also disagrees with Alaska DFG’s recommended ramping rate compliance
location. Kenai Hydro states there is potential for non-project-related flows to enter the
bypassed reach (through either overland flow, groundwater accretion, or precipitation),
which would contribute to ramping rates in Grant Creek downstream of the tailrace.
Therefore, Kenai Hydro proposes to monitor ramping at a gage in the project tailrace, to
isolate effects of the project.
Based on the analysis in section 3.3.2.2, in the Ramping Rates subsection,
maintaining ramping rates in line with current changes in stage would help maintain fish
productivity and historical habitat conditions in Grant Creek. Stage/flow changes that
exceed those currently occurring in the winter have the potential to flush salmonid eggs
and alevins from the gravel, potentially limiting reproductive success. Subsequently
limiting upramping to 1 inch per hour during the winter period, as recommended, would
eliminate this risk. Excessive downramping rates could cause fish stranding as water
levels quickly recede and fish become trapped in dewatered sections of the stream
channel. Based on the analysis of downramping rates under existing conditions, we find
that Grant Creek regularly experiences downramping rates greater than 1 inch per hour,
suggesting the Alaska DFG, FWS, and NMFS recommendation could be overly
protective since existing salmonid populations in Grant Creek persist with higher
downramping rates. However, we have not identified a substantial difference in cost
between the agency-recommended and Kenai Hydro-proposed downramping rates.
Therefore, we conclude that the agency-recommended ramping rates are more
protective of the resource and their implementation would be consistent with the FPA.
We recommend Kenai Hydro limit downramping rates to a year-round maximum of 1
inch per hour (when operational control exists), and limit upramping rates to 1 inch per
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hour during the winter (November 16 through May 15) and 2 inches per hour during the
summer (May 16 through November 15).
Ramping rates are intended to protect aquatic resources in Grant Creek, and any
effects of changes in water volume on ramping rates are dependent on channel
morphology. Although there may be some non-project accretion in the bypassed reach,
the project would also modify flows in the bypass, which would contribute to stage
change below the tailrace. Although the magnitude of these changes relative to flows
through the powerhouse would be small and have little contribution to ramping rates
downstream of the tailrace, the dimensions of the tailrace do not reflect the existing
Grant Creek contours and would not provide an accurate assessment of ramping rates
observed in reaches downstream of the project. Because the tailrace channel
dimensions are not consistent with channel dimensions of Grant Creek where the
aquatic resources reside, it is more appropriate to use the ST-2 (GC200) gage location in
Grant Creek as the compliance monitoring point for ramping rates, not a gage in the
project tailrace, as Kenai Hydro proposes.
Details regarding the exact monitoring protocols―location, equipment and
station design, methods, and compliance reporting―should be included in the project
operation compliance monitoring and reporting plan discussed below. We estimate our
recommended ramping rates and associated monitoring would not have any additional
cost because the recommended gage (ST-2 [GC200]) is proposed in this location to
monitor other flow related measures, so a separate gage is not required and benefits to
aquatic resources would be worth the cost. In contrast, the levelized annual cost Kenai
Hydro’s ramping rate monitoring would be an additional $1,630 more than our
recommendation due to the installation of an additional gage in the tailrace.
Water Temperature in Grant Creek
Kenai Hydro proposes an operational regime that minimizes temperature
differences between Grant Creek and Grant Lake, thereby maintaining the existing
Grant Creek thermal regime. As discussed in section 3.3.2.2, flows from Grant Lake to
the powerhouse and bypassed reach would not change average annual discharge from
Grant Lake, thus we would expect no change in residence time that could alter water
temperatures or change lake trophic status. Further, in contrast to a deep withdrawal
that would increase Grant Lake temperatures by removing cooler water and expanding
the warmer epilimnion, the proposed surface withdrawal would maintain the existing,
natural outlet depth.
Consistent with NMFS 10(j) recommendation 8, FWS 10(j) recommendation 8,
and Alaska DFG 10(j) recommendation 8, Kenai Hydro proposes to evaluate the effects
of project operation on water temperatures in Grant Creek by monitoring water
temperature in Grant Lake near the intake structure at a depth of 0.5 meter and in Grant
Creek downstream of the tailrace. However, Kenai Hydro’s proposal and NMFS’s and
FWS’s recommendations are not consistent on the threshold criteria for these
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temperature comparisons. Consistent with FWS’s recommendation, Kenai Hydro
proposes to operate the project to ensure monthly average lake and creek temperatures
are within 1ºC. However, NMFS recommends that Kenai Hydro operate the project to
ensure that water temperatures in Grant Creek are not warmer or colder than pre-project
temperatures by a target range of 0.5 to 1.0°C. NMFS does not specify the period
(daily, monthly, annual average) for comparison, and Alaska DFG does not specifically
provide threshold criteria for lake and creek temperatures.
As indicated in the analysis in section 3.3.2.2, in the Water Temperature
Monitoring subsection, NMFS’s recommendation to operate the project in a manner that
provides pre-project temperatures in Grant Creek is problematic. Water temperature
data for Grant Creek are limited and insufficient to determine variability in temperature
over multiple years and therefore do not provide suitable target temperatures for the
duration of the project license. Furthermore, it is not clear how NMFS’s recommended
measure would preserve annual variability during operations. Creation of an artificial
temperature regime in Grant Creek that is isolated from temperature variation in Grant
Lake and other drainages may be detrimental to salmonids and other aquatic resources.
Therefore, we do not recommend adherence to pre-project water temperature targets as
a condition of any license issued for the project.
In contrast to establishing water temperature targets, in section 3.3.2.2, we
discuss maintenance of the existing Grant Creek thermal regime, which, based on Kenai
Hydro’s data, is largely driven by the temperature of Grant Lake surface waters. Figure
3-9 demonstrates that 2013 water temperatures measured downstream of the proposed
project tailrace at ST-2 (GC200) closely matched water temperatures in Grant Lake at
0.5 meter below the surface (within 1ºC except for the ice break up period, see below).
Operating the project to minimize differences between Grant Creek temperatures below
the tailrace and Grant Lake temperatures at 0.5 meter below the surface, while not
setting specific targets, would maintain existing, pre-project relationships between
Grant Creek and Grant Lake temperatures critical to timing and emergence of
anadromous fish and provide annual variability that benefits aquatic resources. Such
operations would be consistent with Kenai Hydro’s proposal and Alaska DFG and FWS
recommendations.
As a result, we recommend Kenai Hydro monitor water temperature in real-time
at two locations: (1) at a depth of 0.5 meter in the vicinity of the project intake in Grant
Lake; and (2) downstream of the tailrace at ST-2 (GC200), as recommended by FWS
and Alaska DFG. Based on the analysis in section 3.3.2.2, in the subsection Water
Temperature Monitoring, we recommend measuring the real-time water temperature
compliance targets for Grant Creek at a 0.5-meter depth in Grant Lake at a location void
of influence from the project’s intake. Compliance with the real-time water temperature
target would be measured at ST-2 (GC200).
As discussed in section 3.3.2.2, Grant Creek water temperatures measured at ST-
2 (GC200) were typically warmer in May than concurrent Grant Lake water
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temperatures measured at a 0.5-meter depth (as shown in figure 3-9). These warmer
temperatures occur during the spring turnover of Grant Lake when the lake transitions
from ice covered to an open water (ice break-up) condition, and Grant Creek water
temperature responds more rapidly to the warm spring air temperatures than Grant Lake
surface waters, resulting in a greater variability between Grant Creek and Grant Lake
water temperatures than is seen at other times of the year. In recognition of this process
we recommend two temperature threshold criteria for maintaining the existing water
temperature regime in Grant Creek. First, for the 30-day period when Grant Lake is
going through its ice break-up, we recommend Grant Creek temperature be maintained
at the temperature recorded in Grant Lake at a half meter depth + 1.0°C (+/- 0.5°C).
Second, once the spring turnover is complete and Grant Lake is ice-free, we recommend
that Grant Creek temperatures remain within +/- 0.5°C of Grant Lake temperature
measured at a 0.5-meter depth. The same +/- 0.5°C criterion would be maintained when
Grant Lake is ice-covered.
Methods for determining the onset of and duration of spring turnover (which
triggers the +1°C criterion) as well as monitoring protocols (i.e., location, equipment
and station design, methods, and compliance reporting) should be included in the
project operation compliance monitoring and reporting plan discussed below. Because
this recommendation utilizes equipment and project capabilities already proposed by
Kenai Hydro, we do not anticipate that it would affect costs of the proposed project.
Operation and Compliance Monitoring and Reporting
As discussed in section 3.3.2.2, in the subsections Effects of Project Operation
on Water Temperature in Grant Creek, Effects of Project Operation on Aquatic Habitat
in the Bypassed Reach, and Effects of Project Operation on Aquatic Habitat
Downstream of the Project Tailrace, project operation would modify the timing and
magnitude of flows in the bypassed reach and in Grant Creek downstream of the tailrace
and would likely influence water temperature in Grant Creek. Kenai Hydro proposes to
implement its Operation Compliance Monitoring Plan, which includes measures to
monitor flow and temperature in Grant Lake, the project bypassed reach, and the project
tailrace. Forest Service final 4(e) condition 19 specifies that Kenai Hydro prepare a
reservoir management and inundation plan.
As recommended by staff, and discussed in this section, the project would
provide: (1) minimum flows in the bypassed reach, (2) minimum flows downstream of
the project tailrace, (3) channel maintenance flows, (4) ramping rate restrictions, and
(5) monitoring and maintenance of target water temperatures. We recommend Kenai
Hydro modify its proposed operation compliance monitoring plan in consultation with
NMFS, FWS, USGS, and Alaska DFG, to document compliance with operational
requirements listed above and add a reporting component to the plan. The operations
component of the plan would incorporate all staff-recommended flow and water
temperature monitoring data requirements and specify the operational protocols for
compliance with each. The monitoring component of the plan would articulate specific
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monitoring locations, equipment and station design, and methods. The reporting
component of the plan would include a provision for annual operation and compliance
reports, which would document compliance with all license requirements for flow,
ramping rates, and water temperature. The annual reports would also track and report
other operational events such as spinning reserve operations, channel maintenance
flows, and results of the periodic monitoring of salmonid spawning habitat and, if
warranted, include proposed measures to maintain salmonid spawning habitat.
Additionally, as specified in Forest Service final 4(e) condition 4, the annual report
would include: review of non-routine maintenance; discussion of any foreseeable
changes to project facilities; discussion of any revisions or modifications to approved
plans; identification of any new protection measures needed for newly listed sensitive
species; and identification of any planned pesticide use. Prior to filing the annual report
with the Commission, Kenai Hydro would submit the report to NMFS, FWS, the Forest
Service, USGS, and Alaska DFG for comment and describe how the final report
addresses agency comments.
Our recommended operation compliance monitoring and reporting plan would
satisfy the intent of the Forest Service’s recommended instream flow and reservoir
management and inundation plans. We estimate that the levelized annual cost of our
recommended operation compliance monitoring and reporting plan would be $1,580,
and the benefit to aquatic resources would warrant the cost.
Gravel Management
Consistent with Alaska DFG (10(j) recommendation 4), FWS (10(j)
recommendation 4), and NMFS (10(j) recommendation 4), Kenai Hydro proposes to
provide flows of 800 cfs to the bypassed reach for a minimum of 8 hours during at least
2 years of every 10-year period of the project license to facilitate sediment recruitment
and transport from Reaches 5 and 6 to Reaches 1 through 4.
Based on our analysis in section 3.3.2.2, in the Sediment Management
subsection, we find that project operation would reduce flows in Reaches 5 and 6, and
these reduced flows would reduce gravel recruitment and transport processes relative to
existing conditions. However, providing channel maintenance flows, as Kenai Hydro
proposes and FWS, NMFS, and Alaska DFG recommend, would likely mitigate the
reduction in gravel transport processes. If adequate flows are available without needing
to divert flows from the powerhouse, there would be no lost energy to implement the
measure. However, if flows are insufficient, powerhouse operation may need to reduce
or stop to provide the channel maintenance flows. The worst case scenario would be a
loss of 40 MWh (5 MW times 8 hours), or approximately $5,000, in each year that
generation would be lost. As such, this cost would be worth the benefit of limiting
changes to gravel recruitment and transport processes, and the resulting adverse effects
on aquatic resources. Therefore, we recommend Kenai Hydro provide channel
maintenance flows of 800 cfs to the bypassed reach for an 8-hour duration during at
least 2 years of every 10-year period.
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As discussed in section 3.3.2.2, in the Gravel Monitoring and Augmentation
subsection, while our recommended channel maintenance flows may sustain existing
gravel transport, the reduction in flow magnitude, duration, and frequency through
Reaches 5 and 6 would likely limit the erosional processes Grant Creek relies upon for
gravel recruitment. In response, a decrease in spawning gravel abundance may be
observed over time, which could have long-term adverse effects on the Grant Creek
salmonid population. Therefore, consistent with Forest Service’s 4(e) condition 19’s
aquatic habitat restoration and monitoring plan, Kenai Hydro proposed, in addition to
releasing periodic channel maintenance flows, to monitor gravel recruitment in years 1,
5, and 10. NMFS recommends that Kenai Hydro monitor gravel every 5 years for the
life of the license stating that, if spawning gravels were to be depleted, it likely would
not be detected in the first 5 years of project operation and may take 20 to 30 years or
more to be substantial enough to be detected. Alaska DFG recommends monitoring
gravel conditions during years 5, 10, and 20 of project operation. Alaska DFG also
recommends Kenai Hydro prepare a final report of its findings along with the
identification of measures to mitigate any adverse effects.
To determine the long-term effectiveness of the periodic channel maintenance
flow releases on gravel recruitment within Grant Creek, we recommend Kenai Hydro
monitor spawning gravel recruitment in Reaches 1 through 4 in Grant Creek.
Monitoring gravel abundance in year 1, as Kenai Hydro proposes, would provide a
baseline inventory of available gravel for comparison with future data collection efforts.
Because any potential effects of the project on channel substrate would likely occur
slowly, effects may not be discernable during the first 10 years of operation.
Consequently, Kenai Hydro-proposed gravel monitoring schedule (during year 1 of
construction and years 5 and 10 of operation) would not be sufficient to determine
project effects. On the other hand, as discussed in section 3.3.2.2, in the Gravel
Monitoring and Augmentation subsection, NMFS’s recommendation to monitor gravels
on a 5-year interval for the life of the license may be unnecessary if channel
maintenance flows are found to be adequate to maintain sediment recruitment at current
levels. We do not recommend monitoring in year 5 of the license because construction
of the project is expected to take several years, and it would be difficult to determine
project effects on spawning gravel recruitment after only a couple of years of project
operation. Subsequently, we recommend Kenai Hydro monitor gravel abundance in
Grant Creek during year 1 of the license to provide a baseline inventory, and then again
in years 10, 15, 20 and 30 of the license. The salmonid spawning gravel monitoring plan
should be developed in consultation with FWS, NMFS, and Alaska DFG, and include:
(1) methods for inventorying salmonid spawning gravel in Grant Creek; (2) gravel
abundance inventories in years 1, 10, 15, 20, and 30 of the license; (3) provisions for
reporting inventory results, for each sampling year in the annual report specified above;
and (4) the inclusion of a salmonid spawning gravel recruitment trend analysis in the
years 20 and 30 annual reports. If a decline in spawning gravel is observed after 20
years of operation, the trend analysis should identify actions to improve spawning
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habitat, such as an increase in the frequency, duration, or magnitude of channel
maintenance flows, or gravel augmentation. Following sampling in year 30, the final
report should include analysis of whether mitigation measures (if needed after year 20)
are effective in modifying trends, or if no mitigation was implemented, if results are
consistent with the trend observed at year 20.
We estimate that the levelized annual cost of development and implementation of
salmonid spawning gravel monitoring plan would be $1,410, and the benefits to aquatic
and fisheries resources would be worth the cost.
Vegetation Management Plan
To minimize potential effects associated with project construction and operation
on vegetation communities, Kenai Hydro proposes to implement its Vegetation
Management Plan. The proposed Vegetation Management Plan covers all lands within,
and adjacent to, the project boundary with the potential to be affected by the proposed
project. The plan describes the necessary measures (i.e., BMPs) to minimize effects on
vegetation communities, including: (1) employing appropriate measures to minimize
the introduction and spread of invasive plant species during construction; (2) employing
invasive plant management and control during the first growing season after
construction completion and year 5 post-construction; (3) revegetating the project area
during the first growing season after construction is complete; (4) removing vegetation
in construction areas, and maintaining non-herbaceous vegetation every 8 to 10 years
during the license term for safety and reliability clearances along road and transmission
line corridors; (5) employing general sensitive plant species protection and monitoring
prior to ground-disturbing activities associated with project construction on NFS lands;
and (6) managing the pale poppy population within the project boundary.
Forest Service final 4(e) condition 14 would prohibit pesticide use on NFS lands
within 500 feet of known locations of western toad and known locations of Forest
Service special-status or culturally significant plant populations. Additionally, the
condition specifies that application of pesticides must be consistent with Forest Service
riparian conservation objectives. The condition also specifies that Kenai Hydro obtain
written approval before applying pesticides on NSF lands.
Forest Service final 4(e) condition 19 would require Kenai Hydro to develop an
aquatic invasive species management plan that includes 1) actions to reduce the
potential for introduction of aquatic invasive plants; such as, locating equipment
inspections and/or wash stations well outside of riparian/aquatic zones and requiring all
equipment/material potentially entering riparian/aquatic zones be either inspected or
washed prior to entering stream, lake or riparian zones; and 2) treatments if aquatic
invasive plants are detected.
Based on the analysis in section 3.3.3.2, in the Effects of Project Construction on
Vegetation Communities subsection, we find Kenai Hydro’s Vegetation Management
Plan would ensure that Kenai Hydro revegetates and maintains disturbed areas to their
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pre-construction state, provides appropriate measures to minimize the introduction and
spread of invasive plant species, provides protection for sensitive plant species, and
appropriately manages pale poppy populations. However, although the proposed plan
states Kenai Hydro would comply with the state or federal land manager’s methods for
assessing the success of revegetation efforts, it includes no details regarding success
criteria or a monitoring schedule. We find that these details are a critical component of
a revegetation plan; therefore, the inclusion of survey methods, survey schedules, and
specific guidelines for supplemental plantings would provide the details needed to
evaluate whether the plan would effectively guide restoration efforts.
Based on the analysis in section 3.3.3.2, in the Effects of Project Construction
and Operation on the Potential Spread of Invasive plant Species subsection, Kenai
Hydro’s Vegetation Management Plan already includes measures for washing
construction vehicles and equipment used during instream work. These measures would
apply equally to terrestrial and aquatic invasive plant species and reduce potential for
introduction of all invasive plants. However, modifying the plan to stipulate that
equipment inspection and cleaning stations are located well outside of riparian/aquatic
zones, as Forest Service final 4(e) 19 specifies, would ensure invasive propagules are
not inadvertently washed into waterways. Including treatment of aquatic invasive plants
found in project effected waters would also ensure that if any aquatic plants are
introduced during project construction they are appropriately treated to prevent adverse
effects on aquatic resources.
Based on the analysis in section 3.3.3.2, in the Effects of Project Construction
and Operation on Special-status Plants subsection, Kenai Hydro’s Vegetation
Management Plan would protect known locations of the pale poppy, a designated Forest
Service sensitive plant species. However, although we expect Kenai Hydro’s pre-
licensing surveys were effective in identifying sensitive species populations present in
2013, new pale poppy populations or other Forest Service sensitive species could have
become established within areas of proposed disturbance since the 2013 surveys.
Conducting surveys for sensitive plant species within areas of proposed disturbance,
prior to construction activities, would ensure new populations are identified. If new
populations are discovered, consultation with the Forest Service to identify appropriate
avoidance or mitigation measures would reduce potential effects on sensitive plant
species.
Based on the analysis in section 3.3.3.2, in the Use of Pesticides in Riparian
Areas and on NFS Lands subsection, we find incorporating Forest Service’s specified
measure to prohibit pesticide use on NFS lands within 500 feet of known locations of
Forest Service special-status or culturally significant plant populations would protect
these species from adverse effects. Consultation with the Forest Service would help to
identify known locations of sensitive resources, including special-status or culturally
significant plant populations where protection buffers are needed. However, because
there are no reported occurrences of western toad in the project area and range maps for
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this species do not include the Kenai Peninsula, we do not recommend including
protection buffers for this species.
Therefore, we recommend that Kenai Hydro, in consultation with Alaska DFG
and the Forest Service, modify the proposed Vegetation Management Plan to also
include measures to: (1) locate equipment inspections and/or wash stations well outside
of riparian/aquatic zones; (2) treat aquatic invasive plants if any are detected in project
waters; (3) monitor the success of revegetation efforts monthly between April and
September during construction and annually thereafter for 5 years; (4) develop
restoration success criteria, based on existing vegetation conditions; (5) develop data
collection and analysis methods for monitoring that correspond with success criteria; (6)
monitor restoration success and supplement plantings until success criteria are met for
two consecutive growing seasons; (7) conduct pre-construction surveys for Forest
Service sensitive plant species within areas of proposed disturbance and, if found,
consult with the Forest Service to minimize effects on newly identified populations; (8)
obtain written approval from the Forest Service prior to using herbicides or pesticides
on NFS lands. We estimate the revised plan would have a levelized annual cost of
$5,950, and the benefits to vegetation resources would be worth the cost.
With our recommend modifications to the proposed Vegetation Management
Plan, we do not find any additional benefit of developing a separate aquatic invasive
species management plan. However, we recognize that development of an aquatic
invasive species management plan is included in Forest Service final 4(e) condition 19
and would be included as a mandatory condition in any license issued for the project if
it is included in the final 4(e) condition.
Avian Protection Plan
Kenai Hydro’s proposed Avian Protection Plan includes a variety of measures to
minimize project effects on bird communities. These measures generally focus on
minimizing effects of construction on nesting birds and minimizing potential bird
collisions or electrocutions associated with the proposed project transmission line. As
discussed in section 3.3.3.2, in the Effects of Project Construction and Operation on
Avian Communities subsection, we find the plan would reduce potential project effects
on birds. However, we note that the descriptions of measures related to protection for
nesting birds define protection activity timelines based on scheduled vegetation clearing
activities. Although vegetation removal is most likely to affect nesting birds and
surveys prior to vegetation removal are appropriate, we also expect other construction
activities not requiring vegetation removal, such as blasting or instream work, could
disturb nesting birds. As written, it is unclear if Kenai Hydro’s Avian Protection Plan
would include nest surveys prior to all project-related activities with the potential to
disturb nesting birds. Therefore, we recommend Kenai Hydro modify the Avian
Protection Plan to clearly indicate that surveys for bird nesting activity, as described in
the Avian Protection Plan, would occur prior to any project activities with potential to
disturb nesting birds. We expect that the proposed plan would cover the majority of
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activities necessitating surveys, and our modification would not result in a substantial
increase in survey needs. Therefore, we do not expect our recommendation would have
any additional cost and would provide additional protection to nesting birds.
Protection for Mountain Goats from Aircraft
Kenai Hydro might need to use helicopters to transport materials to the
construction site, which could potentially disturb mountain goats in the vicinity of the
proposed project. FWS (10(j) recommendation 13) and Alaska DFG (10(j)
recommendation 12) recommend that Kenai Hydro minimize the use of helicopters or
airplanes near mountainsides adjacent to Grant Lake and Grant Creek and maintain a
1,500-foot distance between aircraft and mountain goats at all times.
As discussed in the analysis in section 3.3.3.2, in the Effects of Project
Construction and Operation on Mountain Goats subsection, we find that aircraft
accessing proposed project lands would increase the risk of disturbance that could
negatively affect mountain goats residing in the vicinity of the proposed project. Such
disturbance could lead to habitat abandonment or injury. Therefore, we recommend that
Kenai Hydro maintain 1,500 feet between aircraft and potential mountain goat habitat
and follow Forest Service designated no-fly zones for mountain goats and sheep in route
and within the project area. We find this measure would not have any additional cost
and would benefit mountain goats in the vicinity of the proposed project lands.
Public Outreach for Construction Activities
The Park Service recommends that Kenai Hydro establish a project status
website to provide real-time information to the public about the status of access to the
area, install signage at key locations, and a provide a public point of contact. Kenai
Hydro agrees to install temporary signs documenting construction activities and listing a
primary contact at Kenai Hydro for any questions/concerns that may arise during
construction activities.
Based on the analysis in section 3.3.4.2, in the Effects of Construction on Public
Access subsection, we find few visitors use the proposed construction area, and those
that do mainly use it for dispersed uses such as hiking and fishing. Installing signs to
notify visitors of construction activities and provide a point of contact at Kenai Hydro
would reduce potential risks to public safety and inform visitor use. However, most of
the recreation use in the project area is associated with Vagt Lake, which is about 0.5
mile south of and not near the construction area. Consequently, we conclude area
closures for the 18-month construction period would affect very few visitors. Anglers
would still have access to Grant Creek along the streambank trails, and hikers would
still have access to Grant Lake along the Saddle Trail and Case Mine Trail. Therefore,
we do not recommend development of the Park Service’s recommended public outreach
website and providing a point of contact. However, we do recommend the installation
of signs, which we estimate would have a levelized annual cost of $1,580, and public
benefits are worth the cost.
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Public Access and Parking
Following construction, Kenai Hydro proposes to install a gate on the project
access road and prohibit public access to project lands.
Based on the analysis in section 3.3.4.2, in the Effects of Operation on Public
Access subsection, Kenai Hydro’s proposed fencing around project infrastructure would
displace the public from using about 5 to 10 acres near the powerhouse, detention pond,
and laydown area, which includes a portion of land along the south side of Grant Creek
and about 1 acre at Grant Lake near the intake facilities. We find the project would
have limited effect on the availability of recreation land. Allowing non-motorized
access and winter motorized use to Grant Lake via the project access road would be
consistent with land management objectives for state and federal lands in proximity to
the project 78. Providing recreational access via the proposed access road would allow
and encourage trail use, and it would not interfere with Kenai Hydro’s proposed
operation.
Therefore, we recommend Kenai Hydro construct and maintain a parking area
outside the Seward Highway and the ARRC railroad corridor and near the project’s
access road and bridge over Trail Lake Narrows, allow non-motorized use of the project
access road, and provide a gate and signage to prohibit motorized vehicle use of the
access road during the non-winter months. To address Forest Service concerns about
human waste disposal and sanitation, we recommend Kenai Hydro install and maintain
a single-unit vault restroom at the parking area. To ensure the recommended public
access improvements are properly located and managed, and maintained, we
recommend Kenai Hydro develop a public access plan that in consultation with Alaska
DNR, the Forest Service, and Kenai Borough. The plan should allow for year-round
non-motorized use and winter motorized use consistent with applicable land and
resource management plans 79 and should include: (1) descriptions and maps showing
locations roads, trails (including the planned INHT route), gate(s), signs, and a parking
area with a single-unit vault restroom between and including Seward Highway and
Grant Lake; (2) designs for gates and signs (including sign messages); (3) methods used
for monitoring gate effectiveness and vandalism; (4) a schedule for completion of the
parking area and toilet facilities within 1 year from the start of project operation; (5)
procedures and schedules for maintaining gate(s) and facilities; and (6) methods for
78 Alaska DNR land management regulations allow snowmachine use on state-
owned lands during the winter months.
79 Applicable land management guidelines are described in the Kenai River
Comprehensive Plan (Alaska DNR, 1997), Kenai Area Plan (Alaska DNR, 2001), and
Chugach National Forest Revised Land and Resource Management Plan (Forest
Service, 2002).
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periodically reviewing plan effectiveness and the process to implement revisions, if
needed, to provide recreation access and protect environmental resources.
We estimate the parking area with a single-unit vault restroom and developing a
public access plan would have a levelized annual cost of $7,510, and the benefits to
recreation resources would be worth the cost.
Scenery Management
Construction and operation of the project would introduce features to the visual
landscape that would conflict with the existing natural scenic views. Kenai Hydro
proposes to design the project to provide separation between project facilities and Grant
Creek by using colors and textures that blend with the landscape. Kenai Hydro would
stage construction so that equipment would be kept onsite and would schedule most
work to occur during the summer to limit the need for additional lighting during the
construction period. Kenai Hydro also proposes to revegetate areas temporarily
disturbed during construction.
The Park Service recommends screening, to the extent possible, all project
facilities including the roads, buildings, transmission lines, detention pond, and staging
areas using existing and created landforms, vegetation, and exterior paint colors that
blend with the landscape. The agency also recommends using directional security lights
only in the immediate vicinity of project facilities using the lowest effective
illumination and temperatures. Forest Service final 4(e) condition 19 specifies that
Kenai Hydro develop a scenery management plan but provides no additional detail as to
what measures the plan would include.
Based on the analysis in section 3.3.5.2, Aesthetic Resources, Environmental
Effects, we conclude that construction would increase traffic and noise at the
intersection of the access road and the Seward Highway. We find these effects would
quickly diminish with distance from the construction activities. These effects would be
minimal considering their localized nature, and they would only occur during two
summer seasons.
During project operation, effects of the project on visual resources would consist
of views of the access road and transmission line corridor from the Seward Highway.
Recreation users who access the project on foot would have partial views of the
powerhouse, penstock, transmission line, and detention pond and unobstructed views of
the bridge over Trail Lake Narrows. Additionally, visitors using the intake access road
to travel to Grant Lake would also see the intake tower extending about 8 to 20 feet
above the water surface. Finally, project lighting would be visible at night and
contribute to light pollution in the immediate area. We conclude viewing project
infrastructure may contrast with an expectation of viewing an undeveloped landscape
near Grant Lake. However, Alaska DNR does not specifically manage lands at this
location for their scenic value, and the development would not have an appearance that
is inconsistent with the existing management goals. We find this changed appearance
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would be consistent with the designated moderate scenic integrity objective, applicable
to NFS lands from which visitors could view the project, because the view of the intake
tower would only slightly alter the landscape and would be visually subordinate to the
landscape character being viewed.
Implementing a scenery management plan would reduce the effects of the project
on visual resources. The plan would include developing revegetation plans for
construction sites, determining color palates for project infrastructure, describing
processes for agency coordination for maintenance activities, and monitoring views of
project infrastructure over the license term. Monitoring these views is necessary
because effective screening is expected to be achieved a few years after planting when
vegetation becomes established and is taller and denser. Considering vegetation will die
or fall during the license term, monitoring permanent photo points would assist in
determining whether supplemental planting during the license term is necessary to
screen views of project infrastructure, particularly near the INHT. Incorporating the
Park Service’s recommendation for security lighting in a scenery management plan
would have an additional effect of limiting stray lighting in the area.
We estimate development of a scenery management plan would have a levelized
annual cost of $630, and the benefits to visual resources would be worth the cost.
Historic Properties Management Plan
Kenai Hydro proposes to implement the HPMP filed with its amended final
license application to provide for the management of cultural resources and historic
properties within the proposed project APE. The Alaska SHPO, Forest Service, and
Commission staff commented on the HPMP and recommend additional modifications to
it. The analysis presented in section 3.3.6.2, Cultural Resources, Environmental Effects,
indicates that, although the HPMP includes many of the standard requirements of an
HPMP, some measures contained within the HPMP still require some clarification
and/or more detail. In addition, other measures should be included in the HPMP to
ensure that O&M of the project would not adversely affect historic properties over the
term of any original license. Consequently, we recommend modification of Kenai
Hydro’s HPMP in consultation with the Alaska SHPO, Forest Service, and other
consulting parties to consider their comments and to include with the following
revisions: (1) identification of the specific Native organizations that would be consulted
and how they would be involved; (2) addition of Mark Luttrell as a consulting party; (3)
a discussion of the methods used to conduct the TCP study, which Native organizations
were consulted, the results of such consultation, and the conditions under which Native
organizations would continue to be consulted in the future; (4) clarification of the
survey status of the section of the proposed transmission line extending west from
where it crosses the Seward Highway to its interconnection with the main power
distribution line; (5) a specific schedule for completion of all HPMP measures; (6) a
monitoring plan that specifies the circumstances under which monitoring would occur,
who would conduct the monitoring, how frequently regular monitoring would take
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place, and how monitoring results would be disseminated and used; (7) specific factors
that would trigger more active management/mitigation measures over periodic
monitoring; (8) a provision to formally evaluate and assess project effects on submerged
cultural resources should they be exposed in the future; and (9) an appendix containing
documentation and copies of all section 106 consultation, including documentation of
Alaska SHPO concurrence on the project APE and concurrence with all measures
contained within the HPMP (including the use of monitoring and installation of
interpretive signs as mitigation measures), and an appendix that details the extent to
which each comment received on the HPMP is addressed in the revised plan.
We estimate that the levelized annual cost to revise and implement the HPMP for
the project would be $5,980, and the benefits of cultural resource protection justify the
cost.
5.1.3 Measures Not Recommended by Staff
Staff finds that some of the measures recommended by other interested parties
would not contribute to the best comprehensive use of the Grant Creek water resources,
do not exhibit sufficient nexus to project environmental effects, or would not result in
benefits to non-power resources that would be worth their cost. The following section
discusses the basis for staff’s conclusion not to recommend such measures.
Annual Project Review Meeting
Kenai Hydro proposes to prepare an annual report detailing activities related to
compliance with license conditions over the prior year.
Alaska DFG and FWS (10(j) recommendations 18) recommend that Kenai Hydro
hold annual consultation meetings with the agencies to review study and monitoring
reports and compliance with license articles. Forest Service (final 4(e) condition 4)
specifies that Kenai Hydro conduct annual meetings with agencies to discuss measures
needed to ensure protection and use of the NFS lands and resources affected by the
project. The Forest Service expects the meeting agenda to include status of license
condition implementation, monitoring results, review of non-routine maintenance
activities, foreseeable changes to project facilities, revisions to plans, review of changes
to sensitive species lists, maintenance plans, reservoir management and flow schedules,
and planned pesticide use.
As discussed above, we recommend consultation with the agencies on such
specific project-related actions as developing protection plans and assessing certain
monitoring results. Annual review meetings for the more generic purpose of reviewing
sensitive species lists or reviewing overall license implementation would serve no
specific, project-related purpose and is not otherwise needed for the Commission to
administer the terms of any license issued for the project. Therefore, we have no
justification for recommending a license condition requiring routine annual consultation
meetings with the agencies.
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Although we are not recommending a license condition for annual consultation
meetings and annual reviews of sensitive species lists, we recognize that these measures
are included in the Forest Service’s final 4(e) condition 4 and would be included as
mandatory conditions in any license issued for the project.
Adult and Juvenile Salmonid Monitoring
As part of its Biotic Monitoring Plan, Kenai Hydro proposes to monitor adult and
juvenile salmonids in Grant Creek to assess potential project effects on salmonid
populations. In its comments on the Biotic Monitoring Plan, Alaska DFG supports
salmonid monitoring.
We discuss the proposed and recommended salmonid monitoring protocols in
section 3.3.2.2, in the Biotic Monitoring in Grant Creek subsection. We note that,
although monitoring would provide general information on aquatic habitat and the
abundance and distribution of salmonids in the project area, it would neither directly
benefit fisheries resources nor specifically isolate a project-related effect. On the latter
point, we identify a multitude of non-project-related factors with potential to influence
salmon populations in Grant Creek, including commercial and recreational harvest,
ocean survival, predation, land use practices, and/or degraded habitat located in the
Kenai River Watershed outside the project vicinity. While some project effects can be
approximated by comparing fish monitoring results for Grant Creek to other concurrent
fish population assessments in the Kenai River Watershed, this analysis would be
restricted to those fish populations within a significantly limited distance to minimize
other external variables, such as habitat quality and land use practices near spawning
grounds. These external variables prevent the use of general biotic monitoring to isolate
project-related effects on salmonid populations. Finally, generic biotic monitoring
would not relate to any pending or ongoing Commission action, including compliance
with the terms of any license issued for the project.
We estimate that the levelized annual cost of adult and juvenile salmonid
monitoring would be $9,640, and for the reasons noted above, we conclude that the lack
of any project-related benefits to aquatic resources would not be worth the cost.
However, we recognize that development of a fish mitigation and monitoring plan is
included in Forest Service preliminary 4(e) condition 19 and would be included as a
mandatory condition in any license issued for the project if it is included in the final 4(e)
condition.
Salmonid DNA Sampling
In lieu of Kenai Hydro’s proposed measures for gravel augmentation, FWS
recommends (10(j) recommendation 20) that Kenai Hydro collect genetic tissue samples
for species DNA analyses. FWS states that there is an opportunity to obtain live fish
DNA samples during the construction of the project access road. FWS recommends
Kenai Hydro collect tissue from adult salmon from Grant Creek in consecutive sample
years until 200 coho, 100 sockeye, and 200 pink salmon samples have been collected.
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FWS states that DNA collections are needed for Grant Creek to support population
baselines used to identify appropriate post-project mitigation measures over the life of
the project license. FWS also recommends Kenai Hydro collect tissue samples from 50
to 100 rainbow trout and Dolly Varden adults for DNA analysis. FWS states that tissue
samples from rainbow trout and Dolly Varden from Grant Creek would improve the
FWS spatial coverage for these species in the Kenai River Watershed and would
improve the FWS estimates of genetic diversity for both species.
Kenai Hydro states that it will not commit to the collection of genetic samples
from live fish. However, Kenai Hydro states that it would be willing to gather tissue
samples from carcasses found opportunistically during project O&M activities.
In section 3.3.2.2, in the Biotic Monitoring in Grant Creek subsection, we
conclude that FWS’s recommendation to collect tissue samples for genetic analysis
would, as a general matter, improve the existing genetic baselines for salmonids in
Grant Creek. Genetic sampling of live adult salmonids would enable trends to be
evaluated over time. However, project construction and operation, with our
recommended protection and enhancement measures, would not result in a significant
change in the genetic structure of salmonid populations in Grant Creek. In addition, as
discussed above in Adult and Juvenile Salmonid Monitoring, there are a multitude of
non-project-related factors with potential to influence salmon populations in Grant
Creek. DNA collection and genetics monitoring are not capable of isolating the
multitude of potential effects on Grant Creek’s salmonid populations. Consequently,
we find that collecting DNA samples would not support a project-specific evaluation of
project effects on salmonid populations in Grant Creek; therefore, we do not
recommend genetic analysis of the project area fish population.
We estimate FWS’s recommended DNA sampling would have an annual
levelized cost of $1,460, and the lack of project-related benefits to fisheries resources
would not be worth the cost.
Iditarod National Historic Trail
The proposed project powerhouse, penstock, detention pond, transmission line,
and access road, would be located within or cross a portion of Alaska DNR’s 1,000-foot
INHT management corridor, and the intake access road would cross the Forest Service’s
100-foot easement for the INHT. Forest Service final 4(e) condition 21 includes several
measures related to the construction of the proposed project near the trail corridor.
These measures include: (1) coordinate with the Forest Service on design and
development of the access road at its intersection with the INHT; (2) account for
potential drainage effects in the design of the access road and be responsible the
incremental expense of drainage features resulting from the project; (3) maintain and
reconstruct the trail associated with any damage caused by the access road; (4) consult
with the Forest Service to ensure trail function, operability, and sustainability remain
intact; (5) bear additional costs for the trail and bridge caused by penstock construction;
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(6) during construction and 5 years thereafter, remove down trees caused by project
construction; (7) provide administrative access on the project access road to the Forest
Service; (8) develop a scenery management plan (Condition 19); and (9) prevent public
access from the INHT to project facilities.
We analyze Forest Service final condition 4(e) 21 in section 3.3.4.2, in
subsection Iditarod national Historic Trail. Based on our analysis, the elements
contained in Forest Service condition 21, such as consulting with the Forest Service
regarding design plans, providing administrative access on the project access road,
repairing project-related damage, and restricting public access to project facilities are
duplicative of coordination that would occur as components of the development of our
recommended project construction plan, erosion and sediment control plan, vegetation
management plan, and scenery management plan as discussed above in section 5.1.2.
Therefore, we conclude specific license articles for elements 1, 2, 3, 4, 6, 8, and 9, as
listed above, would be redundant and do not recommend their incorporation in any
license that may be issued for the project.
The remaining elements 5 and 7 of Forest Service Condition 21 pertain to
additional design and costs necessary to construct and maintain the INHT because of
project infrastructure. We conclude these measures are administrative and do not
recommend they be included as environmental measure is any license that may be
issued for the project.
However, we recognize that these measures are included in Forest Service final
4(e) condition 21 and would be included as a mandatory condition in any license issued
for the project.
Operational Changes
FWS (10(j) recommendation 21) recommends project operations plans include
process provisions for how any determined need for operational changes would be
incorporated into the project. Any license issued for the project would include the
standard license reopener provisions to address any necessary changes in operations if
conditions warrant operational changes. Therefore, we do not recommend including
such provisions in the project plans.
5.2 UNAVOIDABLE ADVERSE EFFECTS
Project construction would disturb soils in the project area, resulting in
temporary adverse effects on soil resources. Kenai Hydro’s proposed ESCP, with our
recommended modifications, would reduce potential for erosion. Additionally, our
recommended measures for turbidity monitoring, a spoils disposal plan, and a
construction plan would further limit potential effects of project construction on erosion,
sedimentation, and water pollution. Even with implementation of these plans, there
would still be temporary increases in sediment and turbidity levels that would cause
short-term effects on biota in Grant Lake, Grant Greek, and Trail Lake Narrows.
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Project operation would cause flow fluctuations in the bypassed reach and in
Grant Creek downstream of the tailrace. Reducing flows in the bypassed reach could
reduce transport of gravel and fine sediment within Grant Creek. Kenai Hydro’s
proposed channel maintenance flows and our recommended salmonid spawning gravel
monitoring plan would ensure suitable spawning and rearing habitat is available to
salmonids and minimize adverse effects downstream of the project.
Project construction would result in the permanent loss or alteration of about
10.2 acres of vegetated wildlife habitat, including about 8.4 acres of forested habitat and
1.8 acres of herbaceous habitat. Roughly 1.5 acres of temporary disturbance would also
occur during construction. The use of construction equipment could introduce invasive
plant species and provide opportunities for them to colonize areas where land is
disturbed during project construction. However, revegetating the disturbed areas and
ensuring successful establishment of native vegetation as outlined in the Vegetation
Management Plan would help control the introduction and spread of invasive plants.
Construction activities, and to a lesser extent, project operation, would disturb
wildlife through increased noise and human presence. The overhead transmission line
could result in bird collisions and cause direct injury or mortality of individual animals.
Designing the transmission line consistent with practices outlined by APLIC, including
marking to increase visibility, would minimize the potential for collision to the greatest
extent possible. Existing recreational access to the project area, while generally minor
and limited to dispersed use, would be periodically interrupted during the construction
period. Some noise associated with project operation, as well as partial views of project
facilities, would also affect visitors to the area.
5.3 SUMMARY OF SECTION 10(J) RECOMMENDATIONS AND 4(E)
CONDITIONS
5.3.1 Fish and Wildlife Agency Recommendations
Under the provisions of section 10(j) of the FPA, each hydroelectric license
issued by the Commission shall include conditions based on recommendations provided
by federal and state fish and wildlife agencies for the protection, mitigation, and
enhancement of fish and wildlife resources affected by the project.
Section 10(j) of the FPA states that, whenever the Commission believes that any
fish and wildlife agency recommendation is inconsistent with the purposes and the
requirements of the FPA or other applicable law, the Commission and the agency will
attempt to resolve any such inconsistency, giving due weight to the recommendations,
expertise, and statutory responsibilities of such agency.
In response to our February 8, 2018, notice accepting the application to license
the project and soliciting motions to intervene, protests, comments, recommendations,
preliminary terms and conditions, and preliminary fishway prescriptions, Alaska DFG,
NMFS, and Interior collectively filed 33 recommendations under section 10(j) of the
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FPA. In the draft EIS, we made the preliminary determination that 23 of the 33
recommendations fell within the scope of section 10(j). Of those recommendations
determined to be within the scope of section 10(j), we determined in the draft EIS that
three are inconsistent with the purpose and requirements of the FPA or other applicable
law. These recommendations included: (1) conducting turbidity monitoring at the gage
downstream of the tailrace at 15-minute intervals during construction; (2) recording
temperature within the project intake to use as a target temperature for temperature in
Grant Creek below the tailrace; and (3) operate the project to maintain water
temperature in Grant Creek to be within 0.5°C of pre-project temperatures in Grant
Creek.
We sent letters to NMFS and FWS on October 19, 2018, informing them of our
preliminary determination of inconsistencies for their recommendations and requesting
concurrence, comments, or alternative recommendations. The agencies did not request
a 10(j) meeting; however, we discussed inconsistencies between the agencies’
recommendations and the purposes and requirements of the FPA or other applicable law
during the afternoon public meeting for the draft EIS on November 28, 2018, in Moose
Pass, Alaska. Following is a summary of the meeting discussions for each of the
recommendations that are within the scope of section 10(j) but found to be inconsistent
or partially inconsistent with the purpose and requirements of the FPA or other
applicable law.
5.3.1.1 Turbidity Monitoring
In the draft EIS, as discussed in section 5.1.2, Turbidity Monitoring, we did not
recommend adopting FWS’ recommendation to include turbidity monitoring below the
tailrace at 15-minute intervals during construction. Rather, we recommend Kenai
Hydro monitor turbidity upstream and downstream of all in-stream construction
activities and/or discharge points for overland flows that cross construction areas and
discharge into Grant Creek. FWS did not make any comments about turbidity
monitoring during the draft EIS meeting or in its written comments on the draft EIS.
Therefore, the inconsistencies with FWS recommendation monitor turbidity
downstream of the tailrace and sections 4(e) and 10(a) of the FPA remain unresolved.
5.3.1.2 Water Temperature in Grant Creek During Project Operations
In the draft EIS, as discussed in section 5.1.2, Water Temperature in Grant
Creek, we did not recommend adopting NMFS’ recommendation to maintain water
temperature in Grant Creek within 0.5°C of pre-project temperatures in Grant Creek.
Rather, we recommend Kenai Hydro monitor temperature in Grant Lake, at a depth of
0.5 meter, in real time and operate the project to maintain water temperature in Grant
Creek within 0.5ºC of water temperature measured in Grant Lake. We extend that
tolerance to up to 1.5ºC during the ice break-up period.
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Additionally, we did not recommend adopting NMFS and FWS
recommendations to monitor water temperature within the Grant Lake intake. We also
did not adopt NMFS and Alaska DFG recommendations to monitor temperature for the
first 5 years of project operation, then consult with agencies to determine a need for
additional monitoring. Rather, we recommend Kenai Hydro monitor water temperature
in Grant Lake at a depth of 0.5 meter in the vicinity of the project intake in Grant Lake;
and in Grant Creek downstream of the tailrace. Under our recommendation, Kenai
Hydro would continuously adjust the intake depth to control temperature in Grant
Creek.
During the public meeting about the draft EIS, NMFS agreed with our approach
but suggested that over the duration of the license term, the timing of ice off process
could shift and in would be more appropriate to tie the higher 1.5°C tolerance to the ice
off process rather than to a specific month. NMFS, FWS, and Alaska DFG did not
comment on our recommended monitoring locations or continuous monitoring and
intake level adjustment.
Following review of NMFS comments, as discussed in section 5.1.2 Additional
Measures Recommended by Staff, we modified our recommendation to allow up to a 1.5
ºC between Grant Creek and Grant Lake for a 30-day period extending from the onset of
spring melt to ice out. As a result, the inconsistencies with NMFS recommendation to
maintain pre-project temperatures in Grant Creek and sections 4(e) and 10(a) of the
FPA are resolved. During the meeting, we asked if there were any other comments on
our recommendations related to temperature monitoring and there were no replies to the
contrary. Therefore, we consider inconsistencies between NMFS and FWS
recommendations for temperature monitoring within the intake structure and NMFS and
Alaska DFG recommendations to consider discontinuing temperature monitoring after
five years be resolved.
5.3.1.3 Final 10(j) Recommendations
Following the draft EIS meeting, Alaska DFG filed final 10(j) recommendations
on January 9, 2019 that are materially the same as their preliminary conditions, as
amended, that were presented in the draft EIS. FWS did not file final 10(j)
recommendations with its comments on the draft EIS.
NMFS filed final 10(j) recommendations on March 1, 2019. NMFS withdrew
preliminary recommendations for maintaining pre-project temperatures in Grant Creek
and changes to Kenai Hydro’s proposed Biotic Monitoring Plan. NMFS modified its
recommendation to monitor stream flow to include a stilling well at the stream gage
downstream of the project and to recommend Kenai Hydro post project flows to a
website available to NMFS and other stakeholders. NMFS’s letter also included the
following new 10(j) recommendations: (1) fail-safe provisions to ensure bypass and
tailrace flows are provided at all times including following unanticipated interruption in
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generation or equipment failure; (2) consultation with Alaska DFG for the timing of
instream construction activities; (3) turbidity monitoring upstream and 100 feet
downstream of all construction activities; (4) notification of non-compliance events
within 7 days and filing of a detailed description within 30 days of the event; (5)
provide access to the project for NMFS employees; and (6) conduct annual project
review meetings with NMFS and project stakeholders.
Alaska DFG, NMFS, and Interior collectively filed 28 recommendations under
section 10(j) of the FPA. 80 We found 21 of the 28 recommendations to be within the
scope of section 10(j). Of those recommendations determined to be within the scope of
section 10(j), we determined that two are inconsistent with the purpose and
requirements of the FPA or other applicable law. Table 5-1 lists each of these
recommendations and whether they are adopted in the staff alternative. Environmental
recommendations that we consider outside the scope of section 10(j) are considered
under section 10(a) and addressed in the specific resource sections of this document and
the previous section. Sections 5.1.2, Additional Measures Recommended by Staff, and
5.1.3, Other Measures Not Recommended by Staff, discuss the reasons we do or do not
recommend adopting measures that we have determined are within the scope of section
10(j).
80 As shown in table 5-1, Alaska DFG filed 18 recommendations on January 9,
2019; NMFS filed 14 recommendations on March 1, 2019; and Interior filed 21
recommendations on April 9, 2018, and amended with an errata filed on May 2, 2018.
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Table 5-1. Fish and wildlife agency recommendations for the Grant Lake Project (Source: staff).
Recommendation Agency
Within the Scope
of Section 10(j)
Annual
Cost Adopted?
1. Conduct an annual project review
meeting during construction and
first 5 years of operation.
Alaska DFG, FWS,
NMFS (recommendations
18, 18, and 14)
No, not a specific
measure to protect
fish and wildlife
$1,990 No (see section
5.1.3)
2. Develop and implement an ESCP. Alaska DFG, FWS
(recommendations 13 and
14)
Yes $6,000 Yes
3. Provide channel maintenance
flows of 800 cfs for an 8-hour
duration in at least 2 years out of
every moving 10-year window for
the duration of the license.
Alaska DFG, FWS, and
NMFS (recommendations
4, 4, and 4)
Yes $0 Yes
4. Develop a stream gaging plan that
includes: (1) installation of a
flow and temperature gage
meeting USGS standards
downstream of the project
tailrace, (2) monitoring and
recording flows in the bypass,
(3) monitoring and recording
channel maintenance flows,
(4) monitoring and recording
ramping rates, and (5) annual
reporting.
Alaska DFG, FWS, and
NMFS (recommendations
5, 5, and 5)
Yes $630 Yes, but
incorporated into
our
recommended
operations
compliance
monitoring and
reporting plan.
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Recommendation Agency
Within the Scope
of Section 10(j)
Annual
Cost Adopted?
5. Develop and implement a
hazardous materials
containment/fuel storage plan.
Alaska DFG, FWS, and
NMFS (recommendations
15, 16, and 11)
Yes $630 Yes
6. Conduct turbidity monitoring
upstream and 100-feet
downstream of all construction
activities.
Alaska DFG, FWS,
NMFS
(recommendations 14, 15,
and 10)
Yes $9,100 Yes
7. Conduct turbidity monitoring at
the gage downstream of the
tailrace at 15-minute intervals
during construction.
FWS
(recommendation 15)
Yes $10,050 No (see section
5.1.3)
8. Design the powerhouse tailrace to
exclude fish from entering the
powerhouse.
Alaska DFG, FWS, and
NMFS (recommendations
7, 7, and 7)
Yes $0 Yes
9. Conduct hourly temperature
monitoring in Grant Lake at a
depth of 0-0.5 meter away from
influence of the project intake and
downstream of the project tailrace
at the stream gage site and
maintain Grant Creek
temperatures consistent with
recorded lake temperatures.
Alaska DFG, FWS,
NMFS (recommendations
8, 8, and 8)
Yes $4,890 Yes, but we
recommend
monitoring at a
depth of 0.5
meter in Grant
Lake year-round.
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Recommendation Agency
Within the Scope
of Section 10(j)
Annual
Cost Adopted?
10. Record temperature within the
project intake
FWS (recommendation 8) Yes Part of the
cost shown
under item
9 and 10
No (see section
5.1.3)
11. Monitor temperature in Grant
Creek and Grant Lake for the first
5 years of project operation, then
consult with agencies to
determine a need for additional
monitoring.
NMFS and Alaska DFG
(recommendations 8 and
8)
Yes Part of the
cost shown
under item
9 and 10
No. We
recommend real-
time temperature
monitoring at a
depth of 0.5
meter in Grant
Lake year-round
to establish a
real-time water
temperature
target for Grant
Creek for the
duration of the
license.
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Recommendation Agency
Within the Scope
of Section 10(j)
Annual
Cost Adopted?
12. Hourly temperature monitoring in
Grant Creek and Grant Lake for
the duration of the license.
FWS (recommendation 8) Yes Part of the
cost shown
under item
9
Yes, but we
recommend real-
time temperature
monitoring at a
depth of 0.5
meter in Grant
Lake year-round
to establish a
real-time water
temperature
target for Grant
Creek.
13. Use hourly temperature to operate
the project to maintain water
temperature in Grant Creek within
0.5ºC of water temperature in
Grant Lake.
NMFS and Alaska DFG
(recommendations 8 and
8)
Yes Part of the
cost shown
under item
9
Yes, except we
recommend a
Grant Creek
water
temperature
target during ice
out to be up to
1.0ºC warmer
than Grant Lake.
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Recommendation Agency
Within the Scope
of Section 10(j)
Annual
Cost Adopted?
14. Use hourly temperature to operate
the project to maintain water
temperature in Grant Creek within
1.0ºC of water temperature in
Grant Lake.
FWS (recommendation 8) Yes Part of the
cost shown
under item
9
Yes, except we
recommend
maintain water
temperature in
Grant Creek
within 0.5ºC of
target.
15. Follow Alaska DFG timing
windows for instream and stream
construction activities and stream
crossings.
Alaska DFG, NMFS and
FWS, (recommendations
9, 9, and 10)
Yes $0 Yes
16. Site clearings, road corridors, and
the transmission line corridor a
minimum of 100 feet away from
the ordinary high water of Grant
Creek.
Alaska DFG, FWS and
NMFS (recommendations
10, 11, and 10)
Yes $0 Yes
17. Provide minimum flows of 5 to
10 cfs, depending on season, in
Reaches 5 and 6.
Alaska DFG, FWS, and
NMFS (recommendations
1, 1, and 1)
Yes $0 Yes
18. Provide minimum flows of 60 to
150 cfs, depending on season
below the project tailrace.
FWS, NMFS Alaska DFG
(as stated in Kenai
Hydro’s proposed flows
filed August 6, 2018)
Yes $0 Yes
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Recommendation Agency
Within the Scope
of Section 10(j)
Annual
Cost Adopted?
19. Provide provisions to ensure flow
releases are provided
continuously to the bypassed
reach and downstream of the
tailrace at all times including
during any routine maintenance,
emergency project shutdowns, or
unanticipated interruptions to
power generation
Alaska DFG, FWS,
NMFS (recommendations
6, 6, and 6)
Yes $0 Yes
20. Provide down ramping rates of 1
inch per hour and upramping rates
of 1 inch per hour from
November 16–May 15 and 2
inches per hour from May 16–
November 15, as measured at the
stream gage downstream of the
tailrace.
Alaska DFG, FWS, and
NMFS (recommendations
3, 3, and 3)
Yes $0 Yes
21. Modify Biotic Monitoring Plan to
include SMART objectives and
add minnow trapping in winter
and adaptive management criteria.
FWS
(recommendations 9)
No, not a specific
measure to protect
fish and wildlife
$8,190 No (see section
5.1.3)
22. Collect adult salmon tissue
samples for DNA analysis.
FWS
(recommendation 20)
No, not a specific
measure to protect
fish and wildlife
$1,460 No (see section
5.1.3)
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Recommendation Agency
Within the Scope
of Section 10(j)
Annual
Cost Adopted?
23. Implement the Avian Protection
Plan that includes migratory
species and bald eagles.
FWS
(recommendation 19)
Yes $9,460 Yes
24. Develop and implement a bear
safety plan.
Alaska DFG and FWS,
(recommendations 11 and
12)
Yes $80 Yes
25. Avoid the use of helicopters or
airplanes near mountainsides
adjacent to Grant Lake and Grant
Creek. Maintain a 1,500-foot
clearance from slopes with
suitable mountain goat habitat.
Alaska DFG and FWS,
(recommendations 12 and
13)
Yes $0 Yes
26. Notify Alaska DFG, NMFS and
FWS of non-compliance events.
Alaska DFG, NMFS and
FWS, (recommendations
16, 12, and 17)
No, not a specific
measure to protect
fish and wildlife
N/A Yes
27. Provide Alaska DFG and NMFS
employees access to the project
site.
Alaska DFG, NMFS
(recommendation 17 and
13)
No, not a specific
measure to protect
fish and wildlife
N/A Yes
28. Include process provisions for
how any determined need for
operational changes will be
incorporated into the project
FWS
(recommendation 21)
No, not a specific
measure to protect
fish and wildlife
N/A No (see section
5.1.3)
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5.3.2 Land Management Agencies’ Section 4(e) Conditions
In section 2.2.5, Modifications to Applicant’s Proposal—Mandatory Conditions,
we list the final 4(e) conditions submitted by the Forest Service and note that section
4(e) of the FPA provides that any license issued by the Commission “for a project
within a federal reservation shall be subject to and contain such conditions as the
Secretary of the responsible federal land management agency deems necessary for the
adequate protection and use of the reservation.” Thus, any 4(e) condition that meets the
requirements of the law must be included in any license issued by the Commission,
regardless of whether we include the condition in our staff alternative.
Of the Forest Service’s 22 final conditions, we consider 17 of the conditions
(conditions 1 through 3, 5 through 13, and 15 through 18 and 22) to be administrative or
legal in nature and not specific environmental measures. Therefore, we do not analyze
these conditions in this EIS. Table 5-2 summarizes our conclusions with respect to the
four final 4(e) conditions that we consider to be environmental measures. We include in
the staff alternative two conditions as specified by the agency, modify one condition to
adjust the scope of the measure, and do not recommend one condition; the measures not
adopted in total are discussed in more detail in section 5.1, Comprehensive Development
and Recommended Alternative.
Table 5-2. Forest Service final section 4(e) conditions for the Grant Lake Project
(Source: staff).
Condition
Annualized
Cost Adopted?
No. 14: Restrict the use of pesticides on
public lands managed by the Forest
Service without prior written approval
$0 Yes
No. 19: Consult on resource plans N/A In part; we adopt six plans
the Forest Service lists in
the recommendation and
adopt two plans with
modification. The
remaining plans were
considered but not adopted
because no details other
than cost estimates to
develop the plans were
provided.
No. 20: Provide an ECM during project
construction
$9,480 Yes
5-43
Condition
Annualized
Cost Adopted?
No. 21: Iditarod National Historic Trail $0 No, these measures are
duplicative of other Forest
Service and FERC standard
measures
5.4 CONSISTENCY WITH COMPREHENSIVE PLANS
Section 10(a)(2)(A) of the FPA, 16 U.S.C. § 803(a)(2)(A), requires the
Commission to consider the extent to which a project is consistent with the federal or
state comprehensive plans for improving, developing, or conserving a waterway or
waterways affected by the project. We reviewed 14 comprehensive plans that are
applicable to the Grant Lake Project, located in Alaska. No inconsistencies were found.
Alaska Administrative Code. 2012. 5 AAC § 39.222, Policy for the Management of
Sustainable Salmon Fisheries. Juneau, Alaska.
Alaska Administrative Code. 2003. 5 AAC § 75.222, Policy for the Management of
Sustainable Wild Trout Fisheries. Juneau, Alaska.
Alaska Department of Fish and Game. 2006. Cook Inlet Regional Salmon
Enhancement Planning - Phase II (2006–2025). Soldotna, Alaska.
Alaska Department of Fish and Game. Kachemak Bay/Fox River Flats Critical Habitat
Areas, December 1993. Juneau, Alaska.
Alaska Department of Fish and Game. 2000. Kenai Peninsula Brown Bear
Conservation Strategy. Juneau, Alaska. June.
Alaska Department of Fish and Game. 2011. Alaska Anadromous Waters Catalog–
South Central Region. Anchorage, Alaska. June 1, 2011.
Alaska Department of Natural Resources. 1998. Kenai River Comprehensive
Management Plan. Juneau, Alaska. November.
Alaska Department of Natural Resources. Alaska's Outdoor Legacy: Statewide
Comprehensive Outdoor Recreation Plan (SCORP): 2009–2014. Anchorage,
Alaska.
Alaska Department of Natural Resources. 2001. Kenai Area Plan. Anchorage, Alaska.
Alaska Department of Natural Resources. 1995. Management Plan for Kachemak Bay
State Park and Kachemak Bay State Wilderness Park. Anchorage, Alaska.
March.
Bureau of Land Management. 1981. South Central Alaska Water Resources Study:
Anticipating Water and Related Land Resource Needs. Anchorage, Alaska.
5-44
Forest Service. 2002. Chugach National Forest Revised Land and Resource
Management Plan. Department of Agriculture, Anchorage, Alaska. May 31,
2002.
U.S. Fish and Wildlife Service. 2009. Kenai National Wildlife Refuge: Revised
Comprehensive Conservation Plan. Soldotna, Alaska. August.
U.S. Fish and Wildlife Service. n.d. Fisheries USA: The Recreational Fisheries Policy
of the U.S. Fish and Wildlife Service. Washington, D.C.
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6.0 LITERATURE CITED
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rearing, or migration of anadromous fishes – Southeastern Region, Effective June
2, 2008. Alaska Department of Fish and Game, Special Publication No. 08-06,
Anchorage, Alaska.
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or migration of anadromous fishes—Southcentral Region, Effective June 1,
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migration of anadromous fishes—Southcentral Region, Effective June 1, 2009.
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Anchorage, Alaska.
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January 16, 2018.
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7-1
7.0 LIST OF PREPARERS
Federal Energy Regulatory Commission
Kenneth Hogan—Project Coordinator, Fisheries and Aquatic Resources and Water
Resources, (Fishery Biologist; B.T., Fisheries Management and Aquaculture)
Quinn Emmering—Terrestrial Resources (Wildlife Biologist; Ph.D., Zoology; B.S.,
Wildlife Management)
Khatoon Melick—Water Quantity, Geologic and Soils Resources, Engineering, and
Developmental Analysis (Environmental Engineer; Ph.D., Civil Engineering)
Kyle Olcott—Recreation, Land Use, and Aesthetics (Outdoor Recreation Planner; M.S.,
Recreation, Park, and Tourism Resources)
Frank Winchell—Cultural Resources (Archeologist; B.A., M.A., Ph.D., Anthropology)
Louis Berger Group
Tyler Rychener—Task Manager (Environmental Scientist/GIS; M.S., Plant Biology;
B.S., Biology)
Joe Dalrymple—Terrestrial Resources and Threatened and Endangered Species
(Biologist/Environmental Scientist; M.S., Marine Science; B.S., Marine Biology;
B.S. Environmental Science)
Carol Efird—Recreation, Land Use, and Aesthetics (Senior Recreational Specialist;
B.S., Forestry)
Peter Foote—Quality Control Review (Senior Fisheries Biologist; M.S., Fisheries
Biology; B.S., Wildlife Biology)
Alynda Foreman—Terrestrial Resources and Threatened and Endangered Species
(Ecologist; M.S., Multidisciplinary Studies; B.A., Biology)
Nicholas Funk—Water Quantity (Water Resources Planner; M.S., Water Resources
Management and Hydrologic Science; B.S., Environmental Policy and Planning)
Kenneth Hodge—Need for Power, Geologic and Soils Resources, and Developmental
Analysis (Principal Engineer; B.S., Civil Engineering)
Coreen Johnson—Editorial Review (Technical Editor; B.A., English/Education)
Alison Macdougall—Cultural Resources (Senior Environmental Manager; B.A.,
Anthropology)
Brian Mattax—Water Quality (Senior Aquatic Scientist; B.S., Biology)
Josh Schnabel—Socioeconomics (Environmental Planner; M.A., Natural Resources
Management; B.S., Sociology)
Fred Winchell—Quality Assurance Review (Fisheries Biologist; M.S., Fisheries
Biology)
7-2
Subcontractor Staff
Meridian Environmental
Mike Bonoff—Water Quality (Sr. Aquatic Scientist; M.S., Applied Biology/Limnology;
B.S. Biology)
George Gilmour—Fisheries and Aquatic Resources (Senior Fisheries Biologist; B.S.,
Biology)
Robyn Rice— Fisheries and Aquatic Resources (Fisheries Biologist; B.S., Aquatic and
Fisheries Sciences)
8-1
8.0 LIST OF RECIPIENTS
Bureau of Land Management Kenai River Watershed Foundation, Inc.
Center for Water Advocacy Mark Luttrell
Department of the Interior NOAA Fisheries Service
Forest Service Office of the Governor of Alaska
Friends of Cooper Landing, Inc. Resurrection Bay Conservation Alliance
Grant Lake Mining Seward Iditarod Trailblazers
Iditarod Historic Trail Alliance Southern Southeast Regional Aquaculture
Association
Kenai Hydro, LLC U.S. Army Corps of Engineers
APPENDIX A
Comments on Draft Environmental Impact Statement
A-1
COMMENTS ON THE DRAFT ENVIRONMENTAL IMPACT STATEMENT
FOR THE GRANT LAKE HYDROELECTRIC PROJECT
Grant Lake Hydroelectric Project—FERC Project No. 13212-005–Alaska
The Federal Energy Regulatory Commission (Commission or FERC) issued its
draft environmental impact statement (EIS) for the licensing of the Grant Lake
Hydroelectric Project (project) on October 19, 2018. Comments were due by January 9,
2019. In addition, Commission staff conducted two public meetings in Moose Pass,
Alaska, on November 28, 2018, to take oral comments on the draft EIS. A court reporter
recorded statements made at the meetings and all statements were incorporated into the
Commission’s public record for the proceeding.81
In this appendix, we summarize the written comments received on the draft EIS
that pertain to our analysis; provide responses to those comments; and indicate, where
appropriate, how we modified the final EIS. We group the comment summaries and
responses by topic for convenience. Although we do not summarize comments that point
out minor revisions to the draft EIS in this appendix, we have made those revisions in the
final EIS. We also do not summarize comments that only express opinions either for or
against the proposed project or the staff alternative or simply reiterate a stakeholder’s
position or recommendation previously provided. The following entities filed comments
on the draft EIS:
Commenting Entity Filing Date
Jan Konigsberg December 3, 2018
Kenai River Special Management Area Advisory Board December 10, 2018
Environmental Protection Agency December 11, 2018
Kenai Hydro, LLC January 8, 2019
Kenai River Watershed Foundation Inc. January 9, 2019
Alaska State Historic Preservation Officer January 9, 2019
Iditarod Historic Trail Alliance January 9, 2019
Alaska Department Fish and Game January 9, 2019
U.S. Department of the Interior February 13, 2019
National Marine Fishery Service (NMFS) March 1, 2019
Forest Service March 1, 2019
81 See transcripts of the November 28, 2018, scoping meetings, eLibrary accession
nos. 20190109-4006 and 20190109-4007.
A-2
GENERAL
Comment G1: The U.S. Environmental Protection Agency (EPA) comments that the
draft EIS does not describe the standard operating levels for Grant Lake in section 2.2.3.
EPA further comments that the description of Kenai Hydro, LLC’s (Kenai Hydro’s),
proposed use of the project for peaking energy generation is unclear and recommends
revising the final EIS to clarify the proposed project operation throughout the year.
Response: Section 2.2.3 of the draft and final EISs describes the maximum and
minimum operating levels for Grant Lake. Figure 3.6, in section 3.3.2.2, in the Effects of
Project Operation on Water Quantity subsection, depicts the proposed fluctuations in
Grant Lake elevations under existing and proposed operation scenarios over the course of
the year. We describe the proposed peaking operation in section 2.2.3 of the draft and
final EISs. Our understanding of the proposed peaking operation is that Kenai Hydro
would typically undergo peak generation during the winter if demand warrants. In the
spring, Kenai Hydro would operate the project in essentially a run-of-river mode up to
the hydraulic capacity of the project (385 cubic feet per second [cfs]) and store all
inflows above 385 cfs until the reservoir is full. Because peaking operations would
depend on energy demand and load conditions, there is not a predetermined schedule for
when peaking operation would be implemented.
Comment G2: EPA states that the analysis in section 3.3, which presents the potential
effects of the proposed action on each resource area, does not allow for a clear distinction
among the three alternatives—proposed action, staff alternative, staff alternative with
mandatory conditions. EPA recommends revising section 3.3 to clearly distinguish the
potential effects of each of the three action alternatives and suggests it may be most
efficient to discuss the potential impacts of the proposed action in detail first. Following
this analysis, EPA recommends discussing the other two action alternatives in regard to:
(1) which impacts are similar to the proposed action, (2) which impacts are different from
the proposed action, and (3) supporting details for impacts that differ.
Response: The structure of our analysis in section 3 is to (1) identify an issue of
concern; (2) describe the applicant’s proposed measures to address the issue; (3) discuss
agency comments regarding the proposed measures, agency recommendations, and any
comments responding to agency comments and recommendations; and (4) present the
analysis of effects from the proposed alternative and stakeholder recommendations in the
Our Analysis subsection. In section 5, we provide our conclusions and present the staff
recommended alternative, which is based on the Our Analysis found in section 3. We
further summarize the proposed alternative, staff alternative, and staff alternative with
mandatory conditions in the Executive Summary, section 2, and section 5.
Comment G3: EPA comments that because of the format of section 5 of the draft EIS
and the use of the term recommend throughout the section, the process through which
license requirements would be finalized and the methods through which those
requirements would be implemented and enforced are not clear to the reader. EPA
recommends that the final EIS state the specific permit requirements associated with the
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preferred alternative and discuss methods and responsible parties for the implementation
and enforcement of those requirements.
Response: The “recommended” measures in section 5 are made to the Commission for
the Commission’s consideration to include as conditions of any license that the
Commission issues for the project. If the Commission issues a license for the project and
includes the measures recommended by Commission staff as license conditions,
compliance with the license conditions would be administered by the Commission. The
Commission’s decision on whether or not to issue a license is made in a license order
issued apart from the EIS.
Comment G4: EPA recommends that section 5 of the final EIS include draft versions of
the staff-recommended environmental plans, including information about who would be
responsible for implementing and enforcing plan requirements, recommended by FERC
staff.
Response: Kenai Hydro submitted drafts of its proposed Operation Compliance
Monitoring Plan, Biotic Monitoring Plan, Vegetation Management Plan, Avian
Protection Plan, and Historic Properties Management Plan with its amended final license
application. We describe measures included in the proposed plans in the relevant
resource sections in section 3 and evaluate the benefits of the proposed plans. Our
recommendations in section 5 of the draft and final EISs specifically present how those
plans should be modified to further minimize or mitigate project effects. If the
Commission were to license the project, the final license order would identify which
plans Kenai Hydro is required to prepare as components of license conditions. Following
license issuance, Kenai Hydro would prepare draft versions of the plans and provide the
drafts to agencies specified in the license condition for review and comment. Kenai
Hydro would file a final version of the plan with the Commission for approval,
describing how the final plan addresses agency comments. Commission approval would
be required prior to Kenai Hydro’s implementation of any plan. Project licensees are
responsible for plan implementation, and the Commission is responsible for compliance
administration.
Comment G5: EPA states that while the hazardous materials plan is listed in the draft
EIS under recommended measures applicable to project construction, the need for
hazardous materials management and spill prevention, control, and containment also
extends to project operation and that some provisions of the plan apply specifically to
project operation. EPA recommends that the hazardous material plan and the final EIS
specify that this plan applies to project construction and operation and clarify the
mitigation measures applicable to each project phase to reduce project effects.
Response: Staff’s recommended hazardous materials plan would apply to both
construction and operation. We revised section 2.3, Staff Alternative, and section 5.2.1,
Measures Proposed by Kenai Hydro, to clearly indicate that the measure applies to both
construction and operation.
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Comment G6: During the evening meeting on the draft EIS, a commenter asked about
staff’s recommendation for a hazardous materials plan, noting that the purpose of the plan
would be to limit effects of hazardous material spills. The commenter asked what level
of spills were expected to occur.
Response: As discussed in section 5.1.2 of the draft and final EIS, in the Hazardous
Materials Plan subsection, the staff-recommended hazardous materials plan would
include measures to prevent and avoid hazardous material spills. Therefore, spills are
unlikely. However, the plan would include provisions for immediate, local containment,
in the unlikely event of a spill. The plan would also: (1) identify specific locations
where vehicle and equipment maintenance and refueling would occur; (2) provide
provisions regarding removing oil or other contaminants from condensate and leakage
from the turbines and other equipment in the powerhouse; and (3) present reporting
requirements. The plan would be prepared in consultation with the Alaska Department of
Fish and Game (Alaska DFG); U.S. Department of the Interior, Fish and Wildlife
Service; and U.S. Department of Agriculture, Forest Service (Forest Service).
Comment G7: EPA comments that it is unclear why the list of resources considered in
the cumulative effects analyses in section 3.2 is different than the list of resources
considered in the analysis of impact of the proposed action and alternatives in section 3.3.
Response: During the National Environmental Policy Act scoping process, water
quantity, water quality, aquatic resources, and recreation resources were resources that
were identified as having potential to be cumulatively effected by the proposed project in
combination with other past, present, and reasonably foreseeable future activities.82 The
scoping process did not identify any other actions that would have cumulative effects on
geology and soils, terrestrial resources, or cultural resources. Thus, these resources are
not discussed in the cumulative effects section.
Comment G8: The Forest Service comments that it intends that its reservoir
management and inundation plan, (4(e) condition 19), would identify: (1) seasonal
reservoir fluctuations, and (2) National Forest System (NFS) lands potentially inundated
because of the anticipated fluctuations.
Response: Figure 3-6 in the draft and final EISs shows Kenai Hydro’s proposed rule
curve for project operations and provides identification of seasonal reservoir fluctuations.
Section 2.2.3, in the Project Operation subsection of the draft and final EISs, describes
the proposed project operation. We modified text in section 2.2.3 of the final EIS to
clarify that the range of lake elevations under proposed operations would vary from the
current normal maximum elevation of 703 feet down to a minimum of 690 feet.83 Kenai
82 See Scoping Document 4 issued on December 7, 2016 (FERC Accession
Number 20161207-3014).
83 All elevations are North American Vertical Datum 88
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Hydro’s proposed weir at the Grant lake outlet would provide a level crest elevation
across the natural rock outlet resulting in an even flow distribution across the natural
outlet. During large flow events, the lake level will mirror historic conditions because the
proposed weir would not increase the lake elevation above historic levels. Therefore, the
proposed project would not inundate any additional NFS lands beyond what is currently
inundated when Grant Lake is at is normal maximum elevation. For this reason, we did
not need to conduct a more detailed analysis of this measure. Nevertheless, the Forest
Service’s recommended reservoir management and inundation plan (4(e) condition 19) is
a mandatory condition and would be required by any license issued for the project.
NEED FOR POWER
Comment NP1: Jan Konigsberg comments that the need for power analysis in the draft
EIS insinuates that many of the existing generation facilities in the Alaska Railbelt
(Railbelt) would need to be replaced.84 Mr. Konigsberg provides a list of thermal
generation plants in the region and notes the year generation began and recent overhauls
to these facilities. He states that the assertion that nearly all of the Railbelt’s existing
thermal generation is 25 years or older is incorrect and total generating capacity could
remain in place for the next 35 to 50 years. Mr. Konigsberg also questions Kenai
Hydro’s statement that the project is needed to provide spinning reserve and load
following capacity, noting that the 80-megawatt (MW) Nikiski combined-cycle plant and
120-MW Bradley Lake hydroelectric project (FERC Project No. 8221) provide these
resources. Mr. Konigsberg asserts that the need for power is not substantiated; therefore,
the project is not in the public interest. The Kenai River Watershed Foundation concurs;
its comments state that no significant short- or long-term need exists for Grant Lake
hydroelectric power.
Response: We discuss the need for power in section 1.2.2 in the draft and final EIS.
From a need for power perspective (energy and capacity), output from a renewable
resource would benefit the Railbelt region by helping it to reduce dependence on gas and
oil generation and, as a renewable, would protect against the escalation of non-renewable
gas and oil prices.
The Kenai Peninsula electrical system is interconnected to the Railbelt region. Output
from the Grant Lake Project would be available as a renewable energy source throughout
the system, and the relatively small capacity and generation of the project would be easily
integrated into the system.
84 The Alaska Railbelt region includes developments along the Alaska Railroad
between the Kenai Peninsula and Fairbanks. The region includes the Mat-SU Valley,
Anchorage, the Kenai Peninsula, Talkeetna, and Fairbanks.
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The project would, in part, enable Homer Electric Association’s goal to increase the
percentage of its load fed by renewable resources (initial goal of 22 percent by 2018) and
the State of Alaska’s goal of 50 percent renewable power by 2025.85 Homer Electric
Association has stated that it proposes the project to diversify its portfolio, add renewable
energy, and reduce exposure to increasing natural gas prices all of which would provide a
public benefit to the region. Power from the project could also be used locally by Homer
Electric Association’s customers on the western side of the Kenia Peninsula.
GEOLOGY AND SOILS
Comment GS1: The Kenai River Watershed Foundation comments that the area just
sustained a 7.0 magnitude earthquake and is subject to frequent smaller earthquakes,
which could affect the power tunnel.
Response: The final project design would be developed in accordance with applicable
engineering codes and regulations, including parameters for earthquake zones. In
addition, 18 CFR § 12.41 requires all licensees to make adequate provision for installing
and maintaining appropriate monitoring instrumentation whenever any physical condition
that might affect the stability of a project structure has been discovered or anticipated.
The instrumentation must be satisfactory to the Regional Engineer and may include, for
example, instruments to monitor movement of joints, foundation or embankment
deformation, seismic effects, hydrostatic pore pressures, structural cracking, or internal
stresses on the structure.
WATER RESOURCES
Comment WR1: EPA states that while the draft EIS discusses the potential for heavy
metal leaching associated with lake level changes and concludes that this effect is
unlikely to occur based on the characteristics of the shoreline, it does not discuss the
likely source, or sources, of the elevated lead concentrations detected in Grant Lake and
Grant Creek. Therefore, EPA recommends that the final EIS include follow-up water
quality monitoring to ensure that lead levels are not increased by construction or
operation of the proposed project.
Response: Section 3.2.2.2, in the Effects of Project Construction on Water Quality
subsection, of the draft and final EISs presents the potential sources of lead. Potential
anthropogenic contributions include mining. Staff notes that mining has occurred in the
Grant Lake Watershed and discusses recent approval by the Seward Ranger District of a
mining plan for operating the White Rock Mine on the north side of Grant Lake. In
85 The Homer Electric Association’s resources include the 80-MW Nikinski
Station (natural gas), 80-MW Bernice Lake Station (natural gas), 48-MW Soldatna
Station (natural gas), 2.4-MW Seldovia Station (diesel), and a 14.8-MW share of the 120-
MW Bradley Lake Hydro Station.
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addition, as discussed in section 3.3.2.1 of the draft and final EIS, in subsection Water
Quality Sampling, water samples taken from Grant Lake in June 2009 tested positive for
lead with concentrations of 1.1 μg/L.
As discussed in section 3.3.2.2, of the final EIS, in subsection Water Quality the project
has potential to contribute to lead levels in Grant Creek through sediment erosion. Our
recommended erosion control and hazardous materials plans (discussed in section 5.1.2
in subsections Erosion and Sediment Control Plan and Hazardous Materials Plan of the
draft and final EISs) are designed to minimize effects on turbidity of construction and
avoid and contain spills of hazardous materials.
In addition, as discussed in section 3.2.2.2, in the Effects of Project Construction on
Water Quality subsection, of the final EISs our analysis recognizes that if lead is present
in Grant Lake substrate near the location of the project intake, construction and operation
activities, disturbance of the substrate could result in the mobilization of lead into Grant
Creek. As a result of this analysis, in section 5.1.2, subsection Lead Sampling and
Analysis, of the final EIS, we recommend Kenai Hydro modify the Erosion and Sediment
Control Plan to include: (1) pre-construction sediment sampling for lead, and (2)
measures to prevent sediment-bound lead from mobilizing during construction or
operation of the project. With implementation of these sampling and capping measures
(if needed) we conclude potential for lead mobilization would be eliminated and water
quality monitoring during project operations would not be needed.
Comment WR2: David Lisi requested an analysis of how project operations would
affect water temperature in Grant Lake and whether lake temperatures at a depth of
0.5 meter under project operation conditions would follow the same patterns as current
temperatures at that depth.86
Response: Factors determining post-construction water temperatures at a depth of
0.5 meters would be the same as those under current conditions—air temperature, short-
and long-range radiation, and wind speed. We added discussion of effects of project
operations on lake temperatures in section 3.3.2.2, in the Effects of Project Operations on
Water Quality subsection, of the final EIS. Our analysis indicates that lake drawdowns
would reduce the volume of water in Grant Lake by 4.6 percent and would reduce surface
area by 4 percent. The maximum change in the ratio of lake volume to area would be
1 percent, and the annual average lake volume to area ratio would be unchanged. As a
result, shifting the outflow from the natural outlet to the proposed intake structure and
withdrawing water near the surface of Grant Lake is not expected to alter the thermal
86 See draft environmental impact statement meeting transcripts, filed January 9,
2019 (accession number 20190109-4007).
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regime or stratification patterns of the lake and would not change the lake temperature at
a depth of 0.5 meter.
Comment WR3: A commenter requested that the final EIS include analysis of how
project operations would affect temperature in the bypassed reach.87 Similarly, EPA
recommends that the final EIS include an analysis of the pre- and post-project water
temperature thermal gradients along Grant Creek to assess how resulting water
temperatures may affect fish metabolic rates, growth, and development.
Response: Pre-project temperature data document that Grant Creek temperatures mimic
those of the Grant Lake outlet, regardless of the location in Grant Creek. Figure 3-3, in
section 3.3.2.1, in the Fish Populations subsection, of the draft and final EISs shows
daily mean temperatures at sites monitored in Grant Creek during 2013 (the most
complete data set available). All sites, including GC100 and GC600, which are the
upper-most and lower-most sites monitored on Grant Creek, were nearly identical,
showing that longitudinal changes in temperature within Grant Creek were negligible.
Further analysis of these two sites specifically indicates that the average difference in
mean daily temperature was 0.1 degree Celsius (°C) from May through September. The
average difference between Site GC600 and Site GC500 at the upstream and downstream
ends of the proposed bypassed reach was also 0.1°C. We added analysis of potential
effects of project operation on water temperature in the bypass reach to the final EIS in
section 3.3.2.2, subsection Effects of Project Operation on Water Temperature in Grant
Creek. Based on our analysis we expect proposed project operation would result in
average water temperatures at the downstream end of the bypassed reach that are about
1°C cooler in April, about 1°C warmer in May, slightly warmer in June (average 0.1°C),
and on average 0.5°C to 0.9°C warmer in July through September, as compared to current
conditions. We also added analysis to section 3.3.2.2 of the final EIS, in subsection
Effects of Project operation on Aquatic Habitat in the Bypassed Reach. We conclude
that due to limited spawning habitat available in the bypass reach, project-induced
temperature increases during this time would be small and are not expected to affect
salmonids that may be spawning in Reach 5. Therefore the project would not affect fish
metabolic rates, growth, and development in Grant Creek.
Comment WR4: The U.S. Department of Commerce, National Oceanic and
Atmospheric Administration, National Marine Fisheries Service (NMFS) notes that staff
recommend allowing increased temperature variability between Grant Creek and Grant
Lake in May (by increasing the temperature threshold from 0.5°C to 0.1°C) to be
consistent with existing temperature patterns. The agency requested staff consider
87 See draft environmental impact statement meeting transcripts, filed January 9,
2019 (accession number 20190109-4006).
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rewording the recommendation to tie this threshold to the ice-out period, rather than to a
specific calendar month.88
Response: As discussed in section 3.3.2.2, in the Effects of Project Operation on Water
Temperature in Grant Creek subsection, of the final EIS, the process of ice- break-up
during the spring turnover of Grant Lake is the driving factor in the larger difference
between Grant Lake and Grant Creek temperatures compared to other times of year.
Subsequently, the timing of the ice break-up period could fluctuate; therefore, we agree,
and section 5.1.2, in the Water Temperature in Grant Creek subsection the final EIS now
refers to the ice-break up period instead of the month of May for compliance with water
temperature criteria and or recommended temperature thresholds. We now recommend
the following temperature criteria: (1) for the 30-day period when Grant Lake is going
through its ice break-up, Grant Creek temperature be maintained at Grant Lake + 1.0°C
(+/−0.5°C); (2) once the spring ice break-up is complete and Grant Lake is ice-free, Grant
Creek temperatures remain within +/−0.5°C of Grant Lake; and (3) the same +/−0.5°C
criterion be maintained when Grant Lake is ice covered.
Comment WR5: Interior comments that coordination between Kenai Hydro and the
U.S. Geological Survey (USGS), Alaska Science Center, would ensure USGS in Alaska
has a full understanding of the project, the data collection methods, and data availability.
Response: We agree coordination with USGS during development of the staff-
recommended operation compliance and reporting plan would allow USGS to provide
comments on stream gage data collection methods and be informed of data collected at
the project. We modified section 5.1.2, Operation Compliance Monitoring and
Reporting subsection, to include USGS in the list of agencies with which Kenai Hydro
would consult during plan preparation and the list of agencies that would receive annual
reports from Kenai Hydro, for comment, prior to the report being filed with the
Commission.
AQUATIC RESOURCES
Comment AQ1: EPA comments that staff does not provide support for the statement in
section 3.3.2.2, page 3-58, of the draft EIS that maintaining “the pre-project thermal
regime of Grant Creek could limit the genetic integrity of Grant Creek salmonid stocks
over time” and recommends that staff revise the final EIS to include supporting
information.
Response: EPA misinterpreted our analysis. NMFS’s 10(j) recommendation was meant
to establish pre-project water temperature targets for Grant Creek based on pre-project
temperature data collected in Grant Creek. However, as indicated in our analysis in
88 See draft environmental impact statement meeting transcripts, filed January 9,
2019 (accession number 20190109-4006).
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section 3.3.2.2 of the draft EIS, in subsection Effects of Project Operation on Water
Temperature using the limited pre-project water temperature dataset to establish a
thermal regime in Grant Creek would limit annual variability that may otherwise be seen
under natural conditions. As a result, we conclude that limiting Grant Creek water
temperature to those recorded during the short-term study would reduce annual
variability present under existing conditions. The reference to reduced genetic integrity
was in recognition that limiting exposure of salmonids populations to natural variability
previously inherent in the system could, through natural selection, reduce the genetic
variability associated with greater temperature tolerances in the salmonid populations.89
Comment AQ2: EPA comments that while the draft EIS includes a table of run timing
for a few of the fish species in Grant Creek, it does not sufficiently analyze the potential
effects of project operation on fish species, populations, and habitats. Therefore, it
recommends that the staff revise the final EIS to include a species life-stage periodicity
chart to help the reader understand how the timing of potential effects from project
operation would affect fish species.
Response: We revised section 3.3.2.1, Aquatic Species, Affected Environment, to include
a life-stage periodicity chart. Data about life stages are included in the draft and final
EISs in our analysis of the project’s operational effects on fish habitat in the bypassed
reach and downstream of the tailrace. Based on our analysis in section 3.3.2.2, we find
that project construction may have limited short-term, localized effects on water quality,
and project operation would result in slightly lower flows in Grant Creek in the spring
and summer and slightly higher flows in the late fall and winter. Our recommended
measures, including minimum instream flows in the bypassed reach and downstream of
the project tailrace, ramping rate requirements, channel maintenance flows, and
construction-related measures to protect water quality would maintain aquatic habitat
diversity. These measures, coupled with the implementation of our recommended water
temperature management, would minimize project effects on aquatic habitat and
therefore are adequate to prevent population level effects on resident and anadromous
fish species in Grant Lake and Grant Creek.
Comment AQ3: Because flow fluctuations caused by spinning reserve and load-
following operations may result in stranding and/or trapping of fry and juvenile fish, EPA
recommends revising the final EIS to include an analysis of potential relevant scenarios
89 In its final 10(j) recommendations, files on March 1, 2019, NMFS no longer
recommends maintaining pre-project temperatures in Grant Creek. NMFS final 10(j)
recommendation 8 recommends Kenai Hydro use the adjustable gates in the proposed
intake to ensure water temperature in Grant Creek below the tailrace match the water
temperature of Grant Lake at a depth of 0.5 meter. Therefore, text in the draft EIS
responding to NMFS preliminary 10(j) 7 that recommended maintaining pre-project
temperatures in Grant Creek was removed from the final EIS.
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for the rate of change in flow to downstream habitat reaches under load-following and
spinning reserve operations.
Response: As discussed in section 2.2.3, Project Operation, of the draft EIS, when the
project is operated to provide spinning reserve generation, flows from the powerhouse
would be diverted to a detention pond to prevent effects of rapid flow changes on aquatic
resources in Grant Creek. Pursuant to our recommendation, all project operational
scenarios would be subject to our recommended downramping rates of a maximum of
1 inch per hour (when operational control exists), and upramping rates of 1 inch per hour
during the winter (November 16 through May 15) and 2 inches per hour during the
summer (May 16 through November 15). In the draft and final EISs, we discuss the
effects of spinning reserve operations and analyze project ramping rates in section
3.3.2.2, in the Effects of Spinning Reserve and Load Following on Aquatic Resources and
Habitat in Grant Creek subsection and Ramping Rates subsection, respectively. We
provide our recommended ramping rates in section 5.1.2, in the Ramping Rates
subsection, of the draft and final EISs.
Comment AQ4: EPA comments that the draft EIS notes that channels and bedforms in
Reaches 2 through 4 are sensitive to changes in flow regime and sediment load, and the
proposed minimum flows would result in a 12 percent loss in spawning and rearing
habitat for salmonids. Therefore, it recommends that staff include a temporal timespan
for the spawning and rearing habitat loss in the final EIS and explain what the loss of
habitat means in terms of habitat persistence and availability over time.
Response: We revised section 3.3.2.2, in the Sediment Management subsection and the
Gravel Monitoring and Augmentation subsection, of the final EIS to include an additional
analysis of changes in the flow regime on sediment load in Grant Creek. Our analysis
indicates that changes in peak flow duration, timing, and magnitude may modify the
contributions of the bypassed reach to sediment load in Grant Creek. However, the goal
of our recommended channel maintenance flows, adaptively managed as described in
section 5.1.2 of the final EIS, in subsection Gravel Management, is to sustain the natural
processes of erosion and sediment transport mechanism and protect spawning gravel
abundance in the Grant Creek stream channel and maintain habitat persistence and
availability over time.
In section 3.3.2.2, in the Effects of Proposed Operations on Aquatic Habitat Downstream
of the Project Tailrace subsection, of the draft and final EISs, our analysis includes the
expected change on habitat for spawning and rearing of salmonid species in Grant Creek
under the proposed flow regime. These calculations are based on the timing that
salmonid life stages are present in Grant Creek and their habitat use by life history
(i.e., when salmon are rearing or rainbow trout are spawning). Our analysis finds that the
amount of spawning habitat for all salmonid species would remain the same as under
current conditions in an average water year because the project would have little or no
effect on flows in lower Grant Creek during the salmonid spawning periods in a normal
water year. In a low water year, while the minimum instream flow requirements would
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apply, a loss of an average of 11 percent of spawning habitat for all salmonids may be
observed during those water year types.90 However, low water years have occurred 13
out of 66 years in the period of record; subsequently, the effect of the project during low
water years is expected to be minimal on the spawning habitat availability over time.
Combined with the staff-recommended measures to protect spawning gravels (discussed
above), we anticipate the level of spawning habitat would depend on water year type, and
given the infrequency of low water years and that our recommend flow regimes would
maintain 89 percent of the spawning habitat during low water years, we would expect the
existing fisheries resources in Grant Creek to be maintained at its current levels for the
term of any license.
Comment AQ5: EPA disagrees with the staff conclusion that the project would not have
population level effects on fish species and states that it is likely the project would reduce
the salmonid spawning populations in Grant Creek. Specifically, the loss of spawning
and rearing habitat would ultimately reduce spawning population and reduced spawning
success, and reduced rearing habitat would mean a reduction in survival of juveniles.
EPA also notes that thermal impacts may reduce the survival of incubating eggs and
could cause additional losses. These additive impacts would almost certainly result in
population reductions. EPA, therefore, recommends that the final EIS include an
adequate analysis of the potential for population level effects on the Grant Creek fish
species, including effects of water temperature on the growth and development of
incubating eggs and emergence timing.
Response: As demonstrated in section 3.3.2.2, in the Effects of Project Operation on
Aquatic Habitat Downstream of the Project Tailrace subsection, of the draft and final
EISs, during a normal water year, the project would have little or no effect on habitat
availability in lower Grant Creek during the Chinook, coho, and sockeye salmon and
Dolly Varden spawning periods and would have only a slight decrease in habitat
availability during the first 2 weeks of the 6-week rainbow trout spawning period.
Section 3.3.2.2 of the draft EIS also notes that increased flows in winter for all water
years would have a benefit for rearing of rainbow trout fry, and Chinook, coho, Dolly
Varden, and rainbow trout juveniles. However, the draft and final EISs recognize that a
reduction in juvenile rearing habitat would occur for these species during the summer
(June through October) of low water years and during late May and June of normal water
years while the reservoir is filling. About 80 percent of salmonid rearing habitat would
remain available in late May and June of normal water years, and combined with the
increase in rearing habitat provided by increase winter flows from January to early May,
the annual survival of juveniles is expected to be maintained at close to current levels.
As articulated in section 3.3.2.2 of the draft and final EISs, project effects on spawning
90 Low water years are considered years when no spill occurs into the bypassed
reach and the only flow in the bypassed reach year-round are minimum flows provided
by the project.
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and rearing habitat would not reduce spawning success or survival of juveniles in normal
years, and the effect of the project in low water years would still provide 88 percent of
the existing habitat for spawning and rearing salmonids in Grant Creek.
Regarding EPA’s concerns that water temperature may reduce the survival of eggs, we
present our analysis of the water temperature monitoring regime as it relates to project
operations in section 3.3.2.2, in the Water Temperature Monitoring subsection. As
discussed in section 5.1.2, in the Water Temperature in Grant Creek subsection, of the
draft and final EISs, we recommend that Kenai Hydro operate the project to provide
water temperatures that mimic pre-project conditions. Maintaining pre-project conditions
would protect against project-induced temperature differences that may affect growth,
development, and survivability of incubating eggs and emergence timing.
Comment AQ6: EPA comments that while FERC asserts that no project-related purpose
exists for the collection of fish tissue samples for genetic analysis, it believes that baseline
genetic fish tissue collection and monitoring are viable protection, mitigation, and
enhancement measures. EPA asserts that the acquisition of a robust genetic baseline of
Grant Creek species pre- and post-project operations would be valuable for documenting
secondary and cumulative project impacts to the biodiversity of populations in the Kenai
River Watershed and could inform species management.
Response: Collection of fish tissue samples for genetic analysis monitoring does not
provide any species protection or mitigation measures for project effects or enhancement
measures for the species. Section 3.3.2.2 of the draft and final EISs and section 5.1.3, the
Salmonid DNA Sampling subsection, present a thorough analysis of the recommendation
to collect genetic samples. Our analysis indicates that although collecting genetic
samples would inform state and federal fish and wildlife agency management decisions,
those management decisions are not a specific project purpose. Further, the collection of
fish tissue samples would not isolate a project-related effect, and DNA sampling would
not inform any pending or ongoing Commission action, including compliance with the
terms of any license issued for the project.
Comment AQ7: EPA comments that Trail Lake Narrows offers complex aquatic habitat
that supports a variety of salmonid life stages and recommends that staff revise the final
EIS to include an analysis of potential effects of proposed project operations on fishery
resources and habitats in this area.
Response: In the final EIS, we now include section 3.3.2.2, Effects of Proposed
Operations on Trail Lake Narrows, to provide a more thorough analysis of the effects of
project operation on the Trail Lake Narrows. Our analysis indicates that the changes to
the hydrograph in Grant Creek would have little effect on flows in the Trail Lake
Narrows because lower flows when the project would be operated to fill the reservoir
would coincide with high snowmelt runoff in other upstream tributaries to the Trail River
system, and the variation in flows from Grant Creek would be within the natural variation
observed at Trail Lake Narrows. Higher flows in winter would result in only minor
changes at Trail Lake Narrows, and winter habitat would remain varied, freezing in
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colder years and remain flowing in warmer years. Although project operation could
reduce the distribution and availability of spawning gravels and large woody material,
adequate channel maintenance flows provided through the bypassed reach would
maintain the existing spawning gravel recruitment and gravel and large woody material
transport from Grant Creek into the Trail Lake Narrows.
Subsequently, we conclude that the proposed Grant Lake Project, with our recommended
minimum instream and channel maintenance flows of adequate frequency, duration, and
magnitude, would not affect the complex aquatic habitat of the Trail Lake Narrows.
Comment AQ8: EPA comments that reduced peak flows and lower velocities in Grant
Creek from project operation would result in higher retention of large woody material in
the mainstem channel (Reaches 1 through 4). EPA recommends that staff revise the EIS
to include an analysis of the potential for increased large woody material retention to
create fish passage barriers and impacts on habitat quality and quantity in Trail Lakes
Narrows.
Response: We revised section 3.3.2.2, the Effects of Operation on Transport of
Materials subsection, of the final EIS to provide a more thorough analysis of the potential
for higher retention rates of wood in the main channel. Project effects on the Trail Lake
Narrows are discussed in the Effects of Proposed Operations on Trail Lake Narrows
subsection. Our analysis finds that large woody material in the Grant Lake system is
limited, so the amount of contribution of wood from Grant Creek to habitat in Trail Lake
Narrows is also expected to be limited. Grant Creek is 1 of 10 tributaries to Upper and
Lower Trail Lakes, and a potential decrease in large woody material contribution in 1 of
the 10 tributaries is not anticipated to substantially affect the habitat complexity in the
Trail Lake Narrows. As a result, staff concludes that project operation would make
modifications to flow that are not expected to substantially affect habitat in the Trail Lake
Narrows, and channel maintenance flows would adequately maintain transport of
sediment and large woody material in a manner similar to the existing conditions.
Comment AQ9: EPA recommends that staff revise the final EIS to include an analysis
of the potential impacts from decreased side channel connectivity to pink salmon
spawning habitat in Reach 1 of Grant Creek.
Response: We revised section 3.3.2.2 of the final EIS to include an analysis of the
effects of project operation on pink salmon habitat. Our analysis in the Effects of Project
Operation on Aquatic Habitat Downstream of the Project Tailrace subsection indicates
that project operation would not decrease side channel connectivity in Reach 1. Habitat
connectivity to the Reach 1 distributary—the only side channel in Reach 1—is provided
at flows greater than 190 cfs, and minimum instream flows below the tailrace are
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recommended to be 195 cfs during the pink salmon spawning season. Therefore, project
operation would not affect any spawning that may occur in the Reach 1 distributary.91
Comment AQ10: The Forest Service states that reduced flows in the bypassed reach,
under project operation could reduce erosion potential and thus reduce contributions of
spawning gravel to the stream channel. The agency states that its recommended
monitoring of spawning gravel in Grant Creek is necessary and recommends a gravel
monitoring and augmentation plan be developed to determine whether the recommended
channel flushing flows are sufficient to protect spawning habitat in Grant Creek. NMFS
states that the recommended channel flushing flows should be considered a hypothesis
and that monitoring is needed to test whether higher flows or gravel augmentation are
needed to maintain existing spawning habitat. Alaska DFG comments that only
monitoring can inform resource agencies and Kenai Hydro whether the channel
maintenance flows are (or are not) meeting the goal of retaining downstream fish
spawning habitat.
Response: We revised section 3.3.2.2, the Sediment Management subsection and Gravel
Monitoring and Augmentation subsection, of the final EIS to include additional analysis
of changes in the flow regime on erosional processes and sediment recruitment in Grant
Creek. This analysis indicates that the reduction in flow magnitude, duration and
frequency through Reaches 5 and 6 would likely limit the erosional processes Grant
Creek relies upon for gravel recruitment, and a decrease in spawning gravel abundance
may be observed over time. As a result of this analysis, we now recommend in section
5.1.2, Gravel Management subsection, of the final EIS the Kenai Hydro: (1) monitor
gravel recruitment, (2) conduct trend analysis of available gravel over time, and (3) if
trend analysis indicate a decline in spawning gravel, identify and propose actions to
improve spawning habitat in Grant Creek (e.g., increase in the frequency, duration,
and/or magnitude of channel maintenance flows, or augment gravel in Grant Creek).
Comment AQ11: Alaska DFG notes that the draft EIS states the agency’s recommended
ramping rates are too conservative because data collected during licensing studies show
that naturally occurring stage changes fluctuate at higher rates than the agency
recommended ramping rate.92 Alaska DFG states that the observed stage changes that
were in exceedance of the agency recommendations are likely an artifact of gage
placement with no stilling basin and should not be considered accurate. Subsequently,
the agency disagrees that its rates are overly conservative when compared to existing
natural conditions, as described in the draft EIS.
91 We note that during fisheries investigations in Grant Creek, 10 pink salmon
were observed at the weir across Grant Creek, and 2 redds were observed in the mainstem
channel of Reach 1. No pink salmon or redds were observed in the Reach 1 distributary.
92 See draft environmental impact statement meeting transcripts, filed January 9,
2019 (accession number 20190109-4007).
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Response: We revised section 3.3.2.2, Ramping Rates subsection, of the final EIS to
clarify our description of the data collection method. Subsequently, we modified our
characterization of the agency-recommended ramping rates in section 5.1.2, Ramping
Rates subsection, of the final EIS to eliminate the phrase “overly conservative”.
Comment AQ12: Alaska DFG and NMFS comment that, in several instances, the draft
EIS erroneously indicates that the agency recommended and applicant proposed
minimum flows in Grant Creek below the tailrace range from 60 cfs to 150 cfs. The
agencies note that the correct agency recommended and applicant proposed minimum
flows are found in table 3-20 of the draft EIS.
Response: We revised the final EIS to correct the inconsistencies about minimum flows.
All references to the minimum flows below the tailrace now reflect the 60 to 195 cfs
recommendation, consistent with the proposed and recommended minimum flows
identified in table 3-20 of the draft EIS.
Comment AQ13: Alaska DFG, Interior, and NMFS comment that the draft EIS is
inconsistent about the location of the recommended channel maintenance flows. Alaska
DFG and Interior note that in some places in the draft EIS (pages xix, 2-9, and 5-3) that
the channel maintenance flows are described as 800 cfs “downstream of the tailrace” and
in other places (pages 3-87, 3-88, and 3-89) the channel maintenance flows are described
as 800 cfs “through the bypassed reach.” Alaska DFG, Interior, and NMFS note that the
correct recommendation from all of the resource agencies should only be for channel
maintenance flows of 800 cfs “through the bypassed reach.”
Response: We revised the final EIS to correct the inconsistencies about the location of
channel maintenance flows and to reflect that the resource agencies’ and our
recommended channel maintenance flows of 800 cfs should be delivered to the bypassed
reach.
Comment AQ14: Alaska DFG, Interior, and NMFS comment that in the draft EIS, staff
do not recommend the agency’s recommended fish monitoring measures for both adult
and juvenile salmonids during project construction and project operation. Alaska DFG,
Interior, and NMFS note that fish monitoring measures were not recommended in the
draft EIS because it is not clear how these measures would isolate project effects from
other nonproject-related variables that could affect fish population dynamics. Alaska
DFG, Interior, and NMFS note project effects can be isolated, to some extent, by
comparing the fish monitoring results for Grant Creek to the results of other fish
population assessments in the Kenai River Watershed (e.g., Cooper Creek, Russian River,
and Kenai River).
Response: Section 3.3.2.2, the Effects or Project Operation on Aquatic Habitat
Downstream of the Project Tailrace subsection and section 5.1.3, the Adult and Juvenile
Salmon Monitoring subsection, of the draft and final EISs present our analysis of the
recommendation to monitor juvenile and adult salmonids. This analysis indicates that
monitoring salmonids would not specifically isolate a project-related effect. We agree
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that some project effects can be approximated by comparing fish monitoring results for
Grant Creek to other concurrent fish population assessments in the Kenai River
Watershed, but this analysis is restricted to data gathered on fish populations within a
limited distance from the project to minimize other external variables, such as habitat
quality and land use practices. Also, without modified salmonid monitoring programs
that reflect specific triggers for modifying the project, such as minimum flows in either
the bypassed reach or below the tailrace, we cannot recommend implementing juvenile
and adult salmonid monitoring as proposed by Kenai Hydro or recommended by the
resource agencies.
We maintain the position that under the recommended measures—minimum instream
flows in the bypassed reach and downstream of the project tailrace, ramping rate
requirements, channel maintenance flows, gravel monitoring plan, and construction-
related measures to protect water quality—would maintain aquatic habitat diversity.
These measures, coupled with the implementation of our recommended water
temperature management, would minimize project effects on aquatic habitat; and
therefore, should not affect the salmonid populations in Grant Creek.
Comment AQ15: Contrary to the draft EIS’s assertion that spawning habitat in Grant
Creek is limited and supports only low salmon productivity, NMFS states that
escapement studies conducted during the 1990s, when salmon were more abundant,
document “very large numbers” of escaping sockeye and Chinook salmon from Grant
Creek. Consequently, NMFS argues that Grant Creek fisheries surveys dating to the
1990s demonstrate that Grant Creek is very productive and asks that FERC consider
these earlier fisheries studies in the final EIS.
Response: In section 3.3.2.1 of the final EIS, in the Fish Populations subsection, we
revised our analysis to better address salmon escapement from Grant Creek. In addition
to recent fishery survey data collected since 2009 to support the development of the Grant
Lake Project license application, the draft EIS considered Grant Lake fishery survey data
made available in 1983, 1984, 1987, and 1996. In the final EIS we now provide the
following additional data from fish population studies conducted in Grant Creek to
section 3.3.2.1, in subsection Fish Populations. The final EIS now includes data from
studies conducted in 1984, 1963, 1952, and 2009. Kenai Hydro estimated that
escapement to Grant Creek was 90 Chinook salmon and 1,169 sockeye salmon in 2013.
The results of Kenai Hydro’s 2013 surveys, included in the draft EIS, are well within
range of previous findings. An review of the Commission’s record for the Grant Lake
project and affiliated dockets did not identify any Grant Creek escapement studies
conducted during the 1990s that were not already included in our analysis..
Subsequently, it is unclear what fisheries studies from the 1990s NMFS is referring.
However, in response to the NMFS comment, we have revised section 3.3.2.2 of the final
EIS, in subsection Effects of Project Operation on Aquatic Habitat in Grant Creek and no
longer describe the habitat in Grant Creek as supporting only low salmon productivity.
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Comment AQ16: NMFS comments that pink salmon have been identified as spawning
in Grant Creek; and therefore, Grant Creek is also essential fish habitat (EFH) for pink
salmon. NMFS recommends that the accuracy of the assumption that the Project could
improve EFH be determined through NMFS’ recommended monitoring to allow early
detection and mitigation of adverse effects.
Response: We revised the section 3.3.2.2 of final EIS, subsection Essential Fish Habitat
to include pink salmon in the analysis of project effects on EFH.
As discussed above in responses to comment AQ14, we maintain the position that under
the recommended measures—minimum instream flows in the bypassed reach and
downstream of the project tailrace, ramping rate requirements, channel maintenance
flows, gravel monitoring plan, and construction-related measures to protect water
quality—would maintain aquatic habitat diversity. These measures, coupled with the
implementation of our recommended water temperature management, would minimize
project effects on aquatic habitat. However, as discussed in our response to comment
A10 above, we conclude there is potential for project operations to reduce sediment
recruitment into Grant Creek and we have modified section 5.1.2 in the final EIS to
include gravel monitoring. Therefore, we modified section 1.3.6 in the final EIS and
rather than concluding the project would benefit EFH in Grant Creek, we find the project
should not affect EFH in Grant Creek.
Comment AQ17: NMFS, Alaska DFW, FWS and Kenai Hydro state that they are in the
process of developing a Memorandum of Understanding that would provide for adult and
juvenile salmon monitoring during seven years spread throughout the first 25 years of
Project operations.
Response: While, for reasons discussed herein, and as discussed in section 5.1.3 of the
final EIS, in subsection Adult and Juvenile Salmon Monitoring, we do not recommend
implementing salmonid monitoring programs proposed by Kenai Hydro and
recommended by the resource agencies.
TERRESTRIAL RESOURCES
Comment T1: Monica Adams requested that the final EIS clarify whether Kenai
Hydro’s proposed Vegetation Management Plan includes measures to prevent transport
of invasive weeds to the project site.93
Response: Kenai Hydro’s proposed and our recommended Vegetation Management Plan
would prevent the spread of invasive plant species into and from the project site through
conformance with best management practices (BMPs). Section 3.1, Invasive Plant
Management and Control, of the plan specifies that Kenai Hydro begin construction
93 See draft environmental impact statement meeting transcripts, filed January 9,
2019 (accession number 20190109-4007).
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activities in un-infested areas before working in infested areas, use weed-free
construction materials, clean construction vehicles and equipment prior to use, limit the
amount and length of time that bare ground is exposed, and minimize ground disturbance
and erosion during construction. We revised section 3.3.3.2, the Effects of Project
Operation on the Potential Spread of Invasive Plant Species subsection, to provide more
information regarding the Vegetation Management Plan and measures that Kenai Hydro
would implement at the project to control invasive weeds.
Comment T2: The Forest Service notes that shallow-rooted spruce trees along the
Iditarod National Historic Trail (INHT) route could become windthrown (uprooted or
broken by wind) when adjacent trees are removed and root zones impacted during
construction. The Forest Service requests that Kenai Hydro be responsible for the
removal of any windthrown trees along the INHT route that may be affected by
vegetation clearing during construction of the project facilities.
Response: As discussed in section 3.3.3.2, Effects of Project Construction on Vegetation
Communities, Kenai Hydro’s proposed Vegetation Management Plan includes measures
to address the removal of vegetation in construction areas within the project boundary,
and maintenance of these areas every 8 to 10 years during the license term. The
frequency and nature of maintenance could be adjusted depending on the condition of the
vegetation (i.e., removal of windthrown trees). The Vegetation Management Plan
describes removal and maintenance of vegetation along access road ROWs, the
transmission line corridor, and in cleared areas around project features. This maintenance
would also include locations where the INHT route intersects these project features, but
would not include the entire INHT route. Because the Forest Service did not indicate a
frequency for removing windthrown trees along the INHT route where construction
occurred, Kenai Hydro would include this activity in the maintenance schedule outlined
in the Vegetation Management Plan.
Comment T3: The Forest Service recommends Kenai Hydro develop an aquatic
invasive species management plan siting that aquatic invasive species have the potential
to cause significant environmental and economic impacts, could substantially interfere
with the hydroelectric facility operations, and are extremely costly and difficult to
eradicate once established.
Response: As discussed in section 3.3.3.1, Terrestrial Resources, Affected Environment,
of the draft and final EISs, very few observations of invasive plant populations have been
reported in the vicinity of the proposed project. Of those observations, none were aquatic
invasive species. Kenai Hydro’s Vegetation Management Plan and staff-recommended
construction plan provide appropriate measures to minimize the introduction and spread
of invasive plant species. Although the Vegetation Management Plan is intended
primarily for terrestrial invasive species, many of the proposed measures would also
minimize the introduction of aquatic invasive species. For example, during construction
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and restoration, Kenai Hydro would avoid or minimize all types of travel through areas
infested with invasive plants, or restrict to those periods when spread of seed or
propagules are least likely; require the use of weed-free construction materials; clean
construction equipment prior to use; and clean vehicle tires, vehicle undercarriage areas,
shovels, and buckets to reduce the potential for invasive species introduction. Kenai
Hydro’s proposed and staff-recommended measures such as protective buffers, ESCP,
and timely site restoration would further reduce the potential for the transport of invasive
species entering the waterways through erosion or runoff. Invasive plant infestations
associated with project construction and operations would be monitored and treated in
consultation with the Alaska DNR, the Forest Service, and their respective invasive plant
management plans (discussed in section 3.3.3.2, Effects of Project Operation on the
Potential Spread of Invasive Plant Species). Although aquatic invasive species are not
likely to establish at the project as a result of project construction or operation, Kenai
Hydro’s Vegetation Management Plan would adequately address unanticipated direct and
indirect effects of proposed construction and operation of the project on both terrestrial
and aquatic resources. Additionally, as discussed in section 5.1.2, we recommend Kenai
Hydro modify its proposed Vegetation Management Plan in consultation with Alaska
DFG and the Forest Service to include additional measures for the management of
invasive species, such as addressing observation of new or unanticipated invasive
species, as necessary.
Comment T4: During the afternoon public meeting on the draft EIS, a commenter
requested that the final EIS include an analysis of how the project operation would affect
vegetation resources along the banks of the bypassed reach.94
Response: We revised section 3.3.3.2 of the final EIS to address potential effects of
project operation on vegetation along the bypassed reach. Kenai Hydro’s proposed
bypassed weir and pump system would provide our recommended minimum instream
flows to the bypassed reach, which would reduce water level fluctuations and minimize
streambank erosion. These flows would vary over the course of the year with lower
flows in the upper reaches (Reaches 5 and 6) of Grant Creek compared to higher flows in
the lower reaches (Reaches 1 through 4) of Grant Creek (downstream of the powerhouse
tailrace) in accordance with minimum flow requirements for the project. Although
project operation is not expected to negatively affect bypassed reach vegetation, the
proposed lower flows in the upper bypassed reach could expose minor amounts of
channel bed and bank. However, this minor exposure would not result in appreciable
opportunities for invasive plant introduction since these areas are steep and bedrock-lined
with limited substrate availability. The lower bypassed reach and its side channels would
continue to be maintained under the proposed flows and the limited, existing vegetation
would continue to be supported. Invasive plant species known to occur in the project
94 See draft environmental impact statement meeting transcripts, filed January 9,
2019 (accession number 20190109-4006).
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area are all upland weeds that would not likely colonize these rocky riparian areas.
Therefore, we anticipate project operation would have minimal effects on existing
vegetation along the bypassed reach.
Comment T5: Kenai Hydro notes that Forest Service preliminary 4(e) condition 20
would provide the ECM with stop work or change order authority (emphasis added),
whereas the draft EIS describes the recommendation as including stop work and change
order authority. Kenai Hydro agrees with ensuring the ECM can stop work but says the
ECM should not have the authority to make decisions about work orders which would
likely require expenditures that would need approval within the organization.
Response: The ECM would monitor construction activities to ensure protection
measures are implemented and functional. If the ECM observes instances where the
protection measures are insufficient or not functioning properly, the ECM would have the
authority to stop work to limit further adverse effects. We agree that stop work authorit y
would protect natural resources in such instances until new measures are put in place.
Because the implementation of additional measures could require approval within the
Kenai Hydro organization, we agree it may not be appropriate for the ECM to have
authority to issue change orders. We revised the final EIS to modify our
recommendation to include only stop work authority and no longer recommend the ECM
should have the authority to issue change orders.
Comment T6: The Forest Service comments that the upper end of Grant Lake has
moose browse habitat and requests the final EIS include analysis of the potential effects
of project-related reservoir fluctuations on the persistence of that habitat. The Forest
Service states it would support off-site mitigation, if appropriate.95
Response: We revised section 3.3.3.2, the Effects of Operation on Moose Browse
Habitat subsection, of the final EIS to address the potential effects of the project on
moose browse habitat at the upper end of Grant Lake. That analysis indicates that
fluctuating reservoir levels associated with project operation could influence vegetation
density and species composition at the upper end of Grant Lake. Under proposed
operations, the level of Grant Lake will be higher in winter and lower in spring than
under existing conditions. However, rainfall combined with runoff processes, which
would remain unaltered by the project, should continue to sustain most preferred moose
browse species including young willow, birch, aspen, and cottonwood trees and provide
adequate conditions for germination and recruitment despite changes in lake levels during
the growing season (see table 3-28). In winter, while lake levels would be elevated over
typical winter conditions they would still be below the existing normal maximum
elevation and would not inundate lands above the normal high water line.
95 See draft environmental impact statement meeting transcripts, filed January 9,
2019 (accession number 20190109-4006).
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Comment T7: The Alaska State Historic Preservation Officer (SHPO) comments that in
table 3-26 in the draft EIS, the INHT route should be analyzed using a trail width of 5 to
10 feet, not 100 feet.
Response: Table 3-27 in the final EIS provides acreages of temporary and permanent
effects of the INHT on vegetation communities. Because initial construction of the trail
could include heavy machinery for grading, we use a wider trail corridor (100 feet) for
the temporary effects. As indicated in the footnote, the permanent effects are calculated
based on a 10-foot wide trail where trail use and maintenance would prevent regrowth of
vegetation. We revised section 3.3.3.2, the Effects of Project Construction on Vegetation
Communities subsection, to clarify corridor widths used for the effects analysis.
RECREATION RESOURCES
Comment RR1: Kenai Hydro comments that the staff recommendation states motorized
access would not be allowed on the access road but then indicates snowmachines would
be allowed to use the road. Kenai Hydro questioned whether the access road would be
suitable for snowmachine use and cross-country skiing because it would be plowed for
operational access. Kenai Hydro requested the final EIS clarify whether staff’s
recommendation includes access for snowmachines and reiterated it is opposed to
allowing public use of the access road.
Response: As discussed in section 3.3.4.1, Land Use, winter motorized use is allowed
on Alaska Department of Natural Resources (Alaska DNR) managed land where the
project access road would be located. Kenai Hydro proposes to prohibit all public use of
the project access road. In contrast, the staff recommendation provides for year-round
non-motorized use and snowmachine use of the project access road during the winter.
Our staff recommendation aligns with land management objectives and allowable uses on
Alaska DNR-managed land where the project would be located. Additionally, we
supplemented the staff recommendation to include the development of a public access
plan that provides a comprehensive approach to managing public access near the project
access road.
Comment RR2: The Forest Service commented that the staff recommendation for
developing a parking area, as staff recommends, should include providing a restroom to
address potential sanitation concerns.96
Response: We revised section 3.3.4.3, Land and Resource Management, in the final EIS
to state the expected increased recreational access associated with the project access road
would increase sanitation needs. We also revised section 5.1.2, Public Access and
96 See draft environmental impact statement meeting transcripts, filed January 9,
2019 (accession number 20190109-4006).
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Parking, to include installing, operating, and maintaining a single-unit vault restroom at
the parking area to address the sanitation concern.
Comment RR3: The Forest Service commented that the change in elevation of Grant
Lake, as shown in figure 3-6 in section 3.3.2.2, Effects of Project Operation on Water
Quantity is nearly six times the natural rate reported by Ebasco (1984) and cited in the
draft EIS. Consequently, and in order to adequately analyze the project effects on winter
recreation on Grant Lake, the Forest Service comments that more detail/analysis should
be provided as to how this change will affect the safety and stability of the ice of Grant
Lake.
Response: The ice-related project effects on Grant Lake are discussed in section 3.3.2.2,
Effects of Project Operation on Water Quantity. The expected lower than current water
surface elevations during the winter could influence the structure of near-shore ice cover.
As ice on the lake subsides, near shore ice would fracture and refreeze. Kenai Hydro’s
proposal to operate the project for spinning reserve could result in localized ice cover
modification. Because the spinning reserve capacity for the proposed project would be
primarily available in the winter when Grant Lake inflows were low and ice cover was
high, the quick withdraw of water from Grant Lake could result in minor localized ice
cover subsidence in the area immediately around the project intake.
Comment RR4: The Forest Service states that the term “wilderness characteristics” in
the INHT easement document is not used in the context of congressionally designated
wilderness, but in terms of maintaining a natural environment adjacent to the trail. The
Forest Service states that while the Seward Highway and some houses are within 0.5 to 1
mile from the planned INHT route, topography and vegetation screen these features from
trail users. The Forest Service comments that locating the powerhouse 75 to 100 feet
from the centerline of the trail will be noticeable to the trail user and is not in alignment
with “conserving the wilderness characteristics” intended for the 1000-foot buffer. The
Forest Service requests the final EIS disclose the effects of construction, operation, and
maintenance of the powerhouse and associated facilities within the 1000-foot buffer on
user experience and associated undeveloped character of the area.
Response: As explained in section 3.3.5.2, Project Access Road and Infrastructure, we
acknowledge potential effects at the planned INHT route associated with views and
sounds of project infrastructure located near the trail. Although the Forest Service
believes “wilderness characteristics” in the context of the easement refers to “maintaining
a natural environment,” our analysis is based on land management decisions which assign
defined scenic integrity objectives. As defined, the potential minimal effects of the
project would be consistent with a landscape having a moderate scenic integrity
objective. Additionally, implementing a scenery management plan, as required by Forest
Service 4(e) condition 19 and recommended by staff would further minimize potential
visual and audible project effects near the planned INHT route.
Comment RR5: The Forest Service commented that its intent for managing segments of
INHT were disclosed in its 2004 Environmental Assessment and Decision Notice for the
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Seward to Girdwood Iditarod National Historic Trail Project and are consistent with the
1986 Comprehensive Management Plan for the INHT, and are not merely aspirational as
the wording in section 3.3.4.2, Iditarod National Historic Trail indicates.
Response: The decision notice for the Seward to Girdwood Iditarod National Historic
Trail Project (USDA 2004) documents the Forest Service selection of Alternative 4
which describes the management intent to construct segments of the trail ranging from
trail class 2 to 5 levels of development. The map for the selected alternative shows the
trail segments near the project would be developed to trail class 3 standards which are
typically appropriate for semi-primitive to roaded natural ROS classifications. The 2004
Environmental Assessment states that the selected alternative is consistent with scenic
integrity objectives contained in the Chugach Land and Resource Management Plan
however it does not state an assigned objective to the trail route. We revised section
3.3.4.2, Iditarod National Historic Trail, to include this information.
Comment RR6: The Forest Service commented that the statements in section 3.3.4.1
Chugach National Forest Land and Resource Management Plan regarding the semi-
primitive motorized recreation opportunity spectrum are inaccurate. The recreation
opportunity spectrum setting guides the management of recreation activities and
development of recreation infrastructure across a broad area and is not appropriate in
guiding whether other types of buildings and uses are appropriate for the area.
Management of recreation uses within a recreation opportunity spectrum setting can be
more restrictive than the setting allows but should not be more permissive.
Response: The types of allowable buildings and uses listed in section 3.3.4.1 are not
based on the designated recreation opportunity spectrum but rather they are those listed in
the Chugach Land and Resource Management Plan as activities that may be allowed on
lands within the Fish, Wildlife, and Recreation Management Area.
Comment RR7: The Forest Service commented that it disagrees with the conclusion in
section 3.3.4.2, Iditarod National Historic Trail that constructing and operating project
infrastructure near the INHT would be consistent with the scenic integrity objective
applicable to adjacent NFS lands. The Forest Service further commented that with the
existing vegetation near Grant Creek and the proximity of the planned powerhouse,
fenced detention pond, access road, and the 6-foot diameter steel penstock to the planned
INHT route, it is likely that these facilities will not be visually subordinate within the
existing natural landscape and the construction of the hydroelectric facility will result in
more than slightly altered deviations in the landscape character.
Response: Although the environmental assessment for the Seward to Girdwood Iditarod
National Historic Trail (USDA 2003) states the selected route alternative is consistent
with the scenic integrity objectives contained in the Chugach Land and Resource
Management Plan, an objective is not specified for the trail route. Consequently, it
would be reasonable to apply the moderate scenic integrity objective which is assigned in
the Chugach Land and Resource Management Plan to the NFS land adjacent to the
planned trail route. To meet the moderate scenic integrity objective the landscape
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character can appear slightly altered and noticeable deviations must remain visually
subordinate to the landscape character being viewed. As explained in section 3.3.5.2,
Project Access road and Infrastructure, we acknowledge potential effects at the planned
INHT route associated with views and sounds of project infrastructure located near the
trail. However, our analysis of the visual simulations determined the project features
would be mostly screened by topography and the dense forest canopy and vegetative
cover in the area. Designing and blending infrastructure with the surrounding area using
appropriate colors and textures would further minimize project appearance. Additionally,
insulating the powerhouse, as proposed, would limit the extent of noise to the area
immediately near the powerhouse. Forest cover and topography would quickly absorb
any noise audible from the powerhouse. Accordingly, our analysis identifies the potential
effects but concludes these would appear visually subordinate by carefully designing
infrastructure and locating the trail within the easement corridor to provide a visual and
sound buffer between the INHT and adjacent project infrastructure and operation.
Additionally, implementing a scenery management plan, as required by Forest Service
4(e) condition 19 and recommended by staff would further minimize potential visual and
audible project effects near the planned INHT route.
Comment RR8: The Forest Service states that decision by Alaska DNR to grant an
easement for construction of a gravel access road along the INHT is not a comparable
situation to the proposed hydroelectric project crossing the INHT. The Forest Service
states that the section of the INHT referenced is located 20 miles south of the project
area, is a INHT where summer motorized use is allowed on the trail, was used for logging
access previously, and has housing subdivisions close to the 1000-foot buffer. The Forest
Service states the existing characteristics of the trail, the motorized uses, and the need for
the flood mitigation for the adjacent neighborhoods led the Forest Service to agree that a
road co-located on the INHT alignment would not interfere with purpose of the trail for
which its rights were granted.
Response: We acknowledge there may be somewhat different circumstances however, as
discussed in section 3.3.4.2, Iditarod National Historic Trail, neither the INHT
Comprehensive Management Plan nor the Kenai Area Plan describe an intended trail
experience as a wilderness experience and neither plan specifies land management
practices that would prohibit development near the INHT. Alaska DNR’s authorized
crossing of the INHT portrays its considerations related to land use management
decisions for the INHT corridor.
Comment RR9: Forest Service state that figure 3-40 visual simulation in the draft EIS
does not accurately represent the current vegetation screening between the trail alignment
and the proposed powerhouse location. It also does not consider the area around the
facility that would be cleared of vegetation to facilitate construction of the facility and for
protection of the facility and workers during high wind events. The Forest Service
believes the powerhouse will be more visible than represented. Forest Service requests
the final EIS specify what type of clear zone will be needed around all proposed facilities,
disclose the visual impacts of the clear zone on the trail alignment, and if any trees would
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need to be removed within the 100-foot easement to facilitate a clear zone for the
facilities. Similarly, the INHT Alliance comments that the analysis of views of project
infrastructure does not consider fencing, vegetation clearance, and the lack of foliage
during the winter.
Response: Section 3.3.5.2, Project Access Road and Infrastructure of the draft and final
EISs present the effects of the project infrastructure as viewed from the INHT. Because
photo renderings of the project infrastructure do not consider vegetation clearance, the
infrastructure may be slightly more visible to INHT users than what is presented in the
photo renderings. We revised section 3.3.5.2, Project Access Road and Infrastructure to
indicate the photo renderings show a more concealed view of project infrastructure
because they did not consider vegetation clearing necessary for project operation and
maintenance. Regardless, our recommendation to screen views with vegetation and to
paint project infrastructure would minimize the project’s appearance to trail users.
Therefore, despite the photo renderings’ failure to consider vegetation clearance, we
expect that project infrastructure would still only slightly alter foreground views and
would not have an appearance that is inconsistent with the existing management goals for
Alaska DNR-managed lands and NFS lands.
Comment RR10: The Forest Service states it disagrees that the planned infrastructure is
consistent with the purpose of the 1000-foot INHT buffer and will not affect the 100-
foot-wide trail. The Forest Service requests the effects analysis disclose that the proposed
hydroelectric facilities are not consistent with the intent of the INHT buffer which is to
“conserve the wilderness characteristics of the Iditarod Trail; provide enough width to
separate conflicting uses such as motorized and non-motorized uses in areas where
multiple uses are recommended; and allow for development of future compatible trail
uses” (ADL 228890) and, as described in the Kenai Area Plan, to provide a “visual and
sound barrier between the recreation corridor and adjacent uses.”
Response: As explained in section 3.3.5.2, Project Access Road and Infrastructure, we
acknowledge potential effects at the planned INHT route associated with views and
sounds of project infrastructure located near the trail. However, our analysis of the visual
simulations determined the project features would be mostly screened by topography and
the dense forest canopy and vegetative cover in the area. Designing and blending
infrastructure with the surrounding area using appropriate colors and textures would
further minimize project appearance. Further, insulating the powerhouse, as proposed,
would limit the extent of noise to the area immediately near the powerhouse. Forest
cover and topography would quickly absorb any noise audible from the powerhouse.
Accordingly, our analysis identifies the potential effects but concludes these would
appear visually subordinate by carefully designing infrastructure and locating the trail
within the easement corridor to provide a visual and sound buffer between the INHT and
adjacent project infrastructure and operation. Additionally, implementing a scenery
management plan, as required by Forest Service 4(e) condition 19 and recommended by
staff would further minimize potential visual and audible project effects near the planned
INHT route.
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Comment RR11: Jeff Estes recommended the final EIS evaluate an access road
alternative that would start at Crowne Point Road and travel north in the new right-of-
way about 1.7 miles to the project.97 Mr. Estes commented that use of this alternative
could provide public access closer to Grant Lake, but the road could be gated to prevent
public access to project facilities. Mr. Estes further commented that the road would not
cross the INHT, would not require construction of a bridge over Trail Lake Narrows, and
the project transmission line could return along the access road and connect to the
Lawing Substation, located along the Seward Highway a short distance north of the
intersection with Crown Point Road. Mr. Estes suggested that removing the need for the
bridge and a multi-million-dollar substation would counter the economic increases of the
longer access road and transmission line.
Response: Kenai Hydro proposed the access road recommended by Mr. Estes in its
Notice of Intent and pre-application document for the proposed Grant Lake / Falls Creek
Projects (P-13212 and P-13211, respectively).98 We reviewed that access road alternative
when the project was proposing to include a pipeline that would carry water diverted
from Falls Creek to Grant Lake. However, Kenai Hydro modified its proposed project to
remove the Falls Creek Diversion in May 2010 and subsequently eliminated the access
road that also served the Falls Creek development. The alternate route that Mr. Estes
recommends would extend north from the existing Crown Point Road to the east of the
proposed Grant Lake powerhouse. From that point, the road would extend west to the
powerhouse and east to the intake structure. Since the current route for the INHT would
pass to the east of the powerhouse, but west of the north-south portion of the alternate
access road connecting to Crown Point Road, the trail would still need to cross the
alternate access road leading to the powerhouse. Therefore, this alternative would not
eliminate the need for the access road to cross the INHT as asserted by Mr. Estes.
It is true that the alternate access road suggested by Mr. Estes would not require a bridge;
however, it would be about 1.7 miles longer than the proposed access route. We estimate
the cost of the bridge to be about $581,900 (2018 dollars). Therefore, even with the
elimination of the bridge, the alternate route proposed by Mr. Estes would be about
$1,385,000 (2018 dollars) more expensive and would disturb an additional 5 acres of
land. It would require construction vehicles and project operation and maintenance staff
to travel an additional 5 miles to the project site and increase traffic on Crown Point
Road. The longer route would also increase project maintenance costs.
97 See draft environmental impact statement meeting transcripts, filed January 9,
2019 (accession number 20190109-4006).
98 Notice of Intent (NOI), Pre-Application Document (PAD), Request for
designation as non-federal representative, and request to use the TLP of Kenai Hydro,
filed August 6, 2009 (accession number 20090806-5072).
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Both the proposed and alternative access road routes could provide recreation benefits by
allowing motorized access to Grant Lake. However, with the exception of snowmobile
use in winter, we do not recommend providing motorized access on the access road to
preserve the existing non-motorized character of the project area and be consistent with
current state and federal land management objectives. It is not clear why the alternate
route would provide better recreational access to Grant Lake
Finally, as discussed in section 5.1.2, in the Public Access and Parking subsection, we
recommend the Kenai Hydro develop a plan to allow public access along the project
access road to Grant Lake. We note that once constructed, the INHT would also provide
access to the project area.
As to the matter of eliminating the need for a substation, re-routing the project
transmission line to interconnect at the Lawing Substation would not eliminate the need
for the project to construct the substation. As proposed, the project would construct a
switchyard adjacent to the powerhouse with a step-up transformer to increase generation
voltage from 4,160 volts to 115 kilovolts (kV). The proposed 115-kV transmission line
would connect with the existing 115-kV transmission line on the west side of the Seward
Highway. Kenai Hydro estimates the cost of the switchyard, including the step-up
transformer, would be $406,000 (2018 dollars).
The proposed transmission line would be 1.1 miles long, while the alternate transmission
line would about 4.4 miles long, at a cost of approximately $3,508,000 (2018 dollars)
more than for the proposed transmission line. The alternate transmission line would also
require additional ground disturbance and vegetation removal and would increase
maintenance costs. Regarding Mr. Estes asserted cost saving associated with a grid
connections at the Lawing Substation; this substation receives power at 115 kV and steps
it down via transformers to 69 kV, 24.9 kV, and 12.5 kV for local distribution. However,
the Lawing Substation does not have a step-up transformer needed to increase the
project’s generation voltage from 4,160 volts to 115 kV. Therefore, the equipment
needed to connect to the grid at this alternative location is the same as at the proposed
location. Subsequently, there would be no cost savings associated with the use of the
Lawing Substation as Mr. Estes asserts.
We estimate the total cost of Mr. Este’s alternate access road and transmission line/grid
connection to be nearly $5 million (2018 dollars) more than Kenia Hydro’s proposal.
Therefore, we conclude the effects on terrestrial resources and economic costs of Mr.
Estes’ recommendation would not be in the public interest. Subsequently, we do not
include a detailed analysis of Mr. Estes’ alternate access road and transmission line route
in the final EIS.
Comment RR12: Kenai Hydro commented that it is opposed to allowing public access
on the project access road based on consultation with members of the local community
and other stakeholders and because it believes sufficient public access is available via the
Case Mine Trail, Saddle Trail, and the INHT when it is constructed. Kenai Hydro also
believes the project access road would not be suitable for winter recreation activities
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(e.g., snowmachine use, skiing, and snowshoeing) because the road would be plowed for
project access.
Response: Public access on the project access road is discussed in section 3.3.4.2,
Effects of Operation on Public Access, of the draft and final EISs. We agree that
prohibiting motorized access on the project access road during the non-winter months is
necessary to discourage trespass and motorized use from occurring off of authorized
routes and this approach would address concerns raised by the local community.
However, allowing year-round non-motorized use and snowmachine use during the
winter months of the access road would be consistent with Alaska DNR’s land
management objectives to allow and encourage trail use on state and federal lands near
the proposed access road, as well as the Federal Power Act which states that projects be
developed for beneficial public uses, including recreational purposes. Plowing may
affect suitability for some winter recreation activities; however, users could choose
whether to use the road based on conditions. Additionally, we revised section 5.1.2,
Public Access and Parking, of the final EIS to require Kenai Hydro develop a public
access plan to provide a comprehensive approach to managing public access near the
project access road.
Comment RR13: Kenai Hydro comments that the staff-recommended parking area near
the gate on the project access road is unnecessary because the primary intent of the gate is
to restrict public access as opposed to allowing some extent of motorized or non-
motorized use.
Response: As discussed in section 3.3.4.2, Effects of Operation on Public Access,
allowing year-round, non-motorized use of the project access road is consistent with
management objectives applicable to Alaska DNR and National Forest System lands.
The parking area would accommodate safe visitor parking off Seward Highway for this
use. Kenai Hydro’s proposal to restrict public access on the project access road on the
grounds that it would be necessary for safe and secure project operation is unfounded,
because as noted in section 5.1.2, Public Access and Parking, Kenai Hydro could develop
a public access plan to provide a comprehensive approach to managing public access near
the project access road in manner that would protect both public and project safety.
Comment RR14: Kenai River Watershed Foundation comments that limiting access on
the project access road would not prevent all motorized access creating security and
safety concerns.
Response: Section 3.3.4.2, Effects of Operation on Public Access, of the draft and final
EISs disclose potential effects such as erosion, vegetation damage, pollution, and noise
associated with unauthorized vehicle use on the access road and adjacent land. We agree
that it is necessary to discourage trespass and motorized use from occurring off
authorized routes. We revised the section 5.1.2, Public Access and Parking, of the final
EIS to supplement the staff recommendation to require Kenai Hydro to develop a public
access plan to provide a comprehensive approach to managing public access near the
project access road. Concerns about controlling motorized public access can be
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addressed by developing the public access plan in consultation with federal and state land
management agencies.
Comment RR15: The Alaska SHPO comments that Kenai Hydro would construct
facilities in an undeveloped area. The project would have an adverse effect on the trail
experience and conflicts with the Kenai Area Plan and INHT Comprehensive
Management Plan.
Response: Section 3.3.4.2, Iditarod National Historic Trail subsection, of the draft and
final EISs present our discussion of project consistency with the INHT Comprehensive
Management Plan. The draft EIS discloses that neither the Kenai Area Plan nor the
INHT Comprehensive Management Plan describe the intended trail experience and that
no plans specify managing land near the project as wilderness or otherwise prohibiting
development. Consequently, we find that the project development is not in conflict with
either plan.
Comment RR16: The Alaska SHPO disagrees with the staff recommendation to not re-
route the INHT; it recommends adopting the National Park Service recommendation to
convene a work group to identify another route.
Response: Section 3.3.4.2, Iditarod National Historic Trail, presents our analysis of the
National Park Service recommendation to convene a work group to identify an alternative
route. We note that the planned INHT route was selected using a public planning process
and achieves a variety of specific objectives: (1) it provides the most direct route of
travel, (2) has the least grade change, and (3) is suitable for winter and summer access.
Further, the proposed project, including measures to design, site, and screen
infrastructure, would not conflict with management guidance or objectives applicable to
Alaska DNR and National Forest System lands. Therefore, it is not necessary to convene
a work group to consider other potential routes.
Comment RR17: The INHT Alliance comments that the discussion in section 3.3.4.2,
Iditarod National Historic Trail, about Alaska DNR authorizing a crossing of the INHT
is misleading and not pertinent because it refers to a location that is “historically a
motorized logging road with existing year-round motorized use, not a trail.”
Response: As discussed in section 3.3.4.2, Iditarod National Historic Trail, neither the
INHT Comprehensive Management Plan nor the Kenai Area Plan describe an intended
trail experience as a wilderness experience and neither plan specifies land management
practices that would prohibit development near the INHT. Alaska DNR’s authorized
crossing of the INHT portrays its considerations related to land use management
decisions for the INHT corridor.
Comment RR18: The INHT Alliance comments that the final EIS should describe how
close the INHT would be to fenced project infrastructure.
Response: Figure 3-26, section 3.3.4.2, Iditarod National Historic Trail subsection, of
the draft EIS depicts the approximate location of the planned INHT route near project
infrastructure. Using the scale provided in figure 3-26, we estimate the distance between
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the approximate locations of the tread of the INHT and the powerhouse to be about 75
feet. We estimate the distance between the INHT tread and the proposed fence around
the switchyard and the wildlife exclusion fence around the tailrace to be about 100 feet
and 150 feet, respectively.
Comment RR19: The INHT Alliance comments that the draft EIS does not disclose
how the staff recommendation to prohibit vehicular access on the project access road,
except for winter snowmachine use, would prevent trespass and damage and how the
1,000-foot-wide INHT corridor would provide a buffer sufficient to separate conflicting
motorized and non-motorized uses.
Response: Section 3.3.4.2, Effects of Operation on Public Access of the draft and final
EISs discloses potential effects such as erosion, vegetation damage, pollution, and noise
associated with unauthorized vehicle use on the access road and adjacent land. As
indicated in our analysis Kenai Hydro’s proposal for a gate and signage is insufficiently
detailed to determine whether it would be sufficient to deter unauthorized motorized use.
Subsequently, we revised the section 5.1.2, Public Access and Parking, of the final EIS to
supplement the staff recommendation to require Kenai Hydro to develop a public access
plan to provide a comprehensive approach to managing public access near the project
access road. The recommended plan would address concerns about controlling motorized
public access in consultation with federal and state land management agencies.
The comment regarding the 1,000-foot INHT corridor refers to Alaska DNR’s rationale
for reserving this distance in its easement to the Forest Service for the planned INHT
route. Our analysis in section 3.3.4.2, Iditarod National Historic Trail is based on the
location of the as-built INHT, which will be within a 100-foot-wide right-of-way for the
trail that will be constructed within the 1,000-foot corridor.
Comment RR20: The INHT Alliance comments that the analysis does not explain how
constructing project facilities in an area that is currently undeveloped aligns with the
intent of the INHT. The analysis describes the area as undeveloped yet refers to nearby
development (e.g., Alaska Railroad, Seward Highway) when assessing the project in
terms of consistency with comprehensive plans.
Response: We describe the footprint of land where project infrastructure would be
constructed as undeveloped in sections 3.3.4.2, Effects of Operation on Public Access and
3.3.4.3, Land and Resource Management. We revised section 3.3.4.2, the Iditarod
National Historic Trail, of the final EIS to clarify that points of development (e.g.,
Seward Highway, residential development) exist about 1 mile west of the project.
To assess plan consistency, we considered management direction specific to the
individual management units of Kenai Area Plan. Although the footprint where the
project would be constructed does not have any development, management plan direction
does not prohibit development.
Comment RR21: The INHT Alliance comments that the project conflicts with the
Kenai Area Plan because “no permanent structures or equipment should be placed within
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the trail corridor if they could adversely affect the trail experience unless the management
intent for the unit specifically allows for it.”
Response: We discuss Kenai Area Plan guidance with regard to placing structures or
equipment in the INHT corridor in section 3.3.4.2, Iditarod National Historic Trail. The
Kenai Area Plan guidance to not place structures or equipment within the corridor would
pertain if their placement would adversely affect the intended trail experience; however,
neither the Kenai Area Plan nor the INHT Comprehensive Management Plan describe the
intended trail experience. Even without such a description, we acknowledge that the
presence of project structures may influence the trail experience and the staff
recommendation includes measures to minimize the project’s appearance with vegetative
screening, painting, and infrastructure design to blend with the surrounding environment.
Because we include measures to minimize project effects to trail users, we conclude the
project would change, but not adversely affect, the trail experience. Therefore,
constructing the project would be consistent with the plan guidance even though
development is not listed as specific management intent for the management unit where
the project would be constructed.
Comment RR22: The INHT Alliance comments that the project conflicts with the
Kenai Area Plan because “no permanent structures or equipment should be placed within
the trail corridor if they could adversely affect the trail experience unless the management
intent for the unit specifically allows for it.”
Response: As discussed in section 3.3.4.2, in the Iditarod National Historic Trail
subsection, the Kenai Area Plan does not describe the intended trail experience for the
INHT. We conclude that although the project would introduce additional facilities into
the area, the present level of development and motorized vehicle use in the surrounding
area and our recommended measures to screen facilities to minimize their appearance
from trail users, the incremental change in the existing appearance would be minimal and
not inconsistent with the existing condition. Therefore, we conclude the project does not
conflict with the Kenai Area Plan.
LAND USE
Comment LU1: Jim Estes commented that the Kenai River Special Management Area
specifies setback requirements which do not allow development along the Trail Lakes
shoreline.99 Mr. Estes noted that the Kenai Hydro’s proposed bridge across Trail Lake
Narrows appears to conflict with this setback requirement.
Response: This comment refers to the setback requirement of the Kenai Area Plan
presented on page 2-53 in table 2-4, Reserved Access, Building Setbacks, and Fish
99 See draft environmental impact statement meeting transcripts, filed January 9,
2019 (accession number 20190109-4006).
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Habitat Management Zones: Minimum Widths Adjacent to Waterbodies. As the table 2-
4 note explains, exceptions to the specified setbacks include, “Structures such as docks,
bridges, and culverts whose purpose is access to or across the stream or lake.”
Accordingly, the setback does not apply to constructing the bridge across Trail Lake
Narrows and there is no conflict with the Kenai Area Plan.
CULTURAL RESOURCES
Comment CR1: The Alaska SHPO commented that while a National Register of
Historic Places (National Register) eligibility recommendation for site SEW-00029
(Alaska Railroad) was prepared, the eligibility status of site has not yet been determined
and the text of the final EIS should be revised to reflect the site’s current status.
Response: In the first bullet of the letter filed on April 18, 2016, the Alaska SHPO
concurred with Kenai Hydro’s National Register evaluations of resources documented
within the project area of potential effects (APE), including site SEW-00029 (letter from
J.E. Bittner, SHPO, Alaska DNR, Division of Parks and Recreation, Office of History
and Archaeology, Anchorage, AK, to M. Salzetti, Kenai Hydro, LLC, Homer, AK dated
March 10, 2015).
Comment CR2: The Alaska SHPO recommends that section 5.0 of the final EIS include
a discussion regarding the preparation and implementation of a PA, particularly in section
5.1.1 in the Project Operations and Project Construction subsection. The Alaska SHPO
also inquiries about duplicate text related to the HPMP in section 5.1.2.
Response: Section 3.3.6.2 states that to meet the section 106 requirements, the
Commission intends to execute a PA with the Alaska SHPO for the proposed project for
the protection of historic properties that would be affected by project construction and
operation. The terms of the PA would require Kenai Hydro to address all historic
properties identified within the project APE through a revised final HPMP. Section 5.1.1
of the EIS pertains to measures proposed by Kenai Hydro with Commission staff’s
recommended modifications to the measures shown in italics. Kenai Hydro proposed to
implement an HPMP. Any license issued for the project would contain an article
requiring adherence to the stipulations of the PA, including but not limited to the revision
of the HPMP or implementation of a revised and approved HPMP. We revised section
5.1.2 of the final EIS to delete the duplicate text.
LITERATURE CITED
AEIDC (Arctic Environmental Information and Data Center). 1983. Summary of
environmental knowledge of the proposed Grant Lake hydroelectric project area.
Final Report submitted to Ebasco Services, Inc., Redmond, Washington,
University of Alaska, Anchorage, Alaska.
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Ebasco (Ebasco Services, Inc.). 1984. Grant Lake Hydroelectric Project Detailed
Feasibility Analysis. Volume 2. Environmental Report. Rep. from Ebasco
Services Incorporated, Bellevue, Washington.
Envirosphere. 1987. Instream flow and habitat analysis Grant Lake hydroelectric
project. Prepared for Kenai Hydro, Inc.
Hayes, S. R., and J. J. Hasbrouck. 1996. Stock assessment of rainbow trout in the Upper
Kenai River, Alaska, in 1995. Anchorage, AK, Alaska Department of Fish and
Game, Fishery Data Series No. 96-43
Johnson, J. and K. Klein. 2009. Catalog of water important for spawning, rearing, or
migration of anadromous fishes – Southcentral Region, Effective June 1, 2009.
Alaska Department of Fish and Game, Special Publication No. 09-03, Anchorage,
AK.
USDA. 2003. Environmental Assessment. Seward to Girdwood Iditarod National
Historic Trail. Chugach National Forest. Region 10, Alaska. June.
USDA. 2004. Decision Notice and Finding of No Significant Impact. Seward to
Girdwood Iditarod National Historic Trail. Chugach National Forest. Region 10,
Alaska. January.
APPENDIX B
Grant Lake Hydroelectric Project—FERC No. 13212
Forest Service, Alaska Region, Chugach National Forest Final 4(e) Terms and Conditions
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General
Condition No. 1 – Requirement to Obtain a Forest Service Special-Use Authorization
Condition No. 2 – Forest Service Approval of Final Design
Condition No. 3 – Approval of Changes
Condition No. 4 – Consultation
Condition No. 5 – Compliance with USDA Regulations and Other Laws
Condition No. 6 – Surrender of License or Transfer of Ownership
Condition No. 7 – Protection of United States Property
Condition No. 8 – Self Insurance
Condition No. 9 – Damage to Land, Property, and Interests of the United States
Condition No. 10 – Risks and Hazards on National Forest System Lands
Condition No. 11 – Access
Condition No. 12 – Maintenance of Improvements
Condition No. 13 – Boundary Markers and Survey
Condition No. 14 – Pesticide and Herbicide Use Restrictions
Condition No. 15 – Revision of Forest Service 4(e) Terms and Conditions
Condition No. 16 – Signs
Condition No. 17 – Additional National Forest System Lands
Condition No. 18 – Use of Explosives
Condition No. 19 – Resource Management Plans
Condition No. 20 – Environmental Compliance Monitor
Condition No. 21 – Iditarod National Historical Trail
Condition No. 22 – Reroute of Iditarod National Historical Trail
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General
License articles contained in the Federal Energy Regulatory Commission’s (Commission)
Standard Form L-2 issued by Order No. 540, dated October 31, 1975, cover those general
requirements that the Secretary of Agriculture, acting by and through the USDA Forest Service,
considers necessary for adequate protection and use of the land and related resources of the
Chugach National Forest. Under authority of section 4(e) of the Federal Power Act (16 U.S.C.
797(e)), the following terms and conditions are deemed necessary for adequate protection and
use of Chugach National Forest lands and resources. These terms and conditions are based on
those resources enumerated in the Organic Administration Act of 1897 (30 Stat. 11), the
Multiple-Use Sustained Yield Act of 1960 (74 Stat. 215), the National Forest Management Act
of 1976 (90 Stat. 2949), and any other law specifically establishing a unit of the National Forest
System or prescribing the management thereof (such as the Wilderness Act or Wild and Scenic
Rivers Act), as such laws may be amended from time to time, and as implemented by regulations
and approved Land and Resource Management Plans prepared in accordance with the National
Forest Management Act. Therefore, under section 4(e) of the Federal Power Act, the following
conditions covering specific requirements for protection and use of the National Forest System
lands shall also be included in any license or license amendment issued for the Grant Lake
Hydroelectric Project.
Condition No. 1 - Requirement to Obtain a Forest Service Special-Use Authorization
The Licensee shall obtain a special use authorization from the Forest Service for the occupancy
and use of National Forest System lands. The Licensee shall obtain the executed authorization
before beginning ground-disturbing activities on National Forest System lands or within one year
of license issuance if no construction or reconstruction was proposed in the application for
license.
The Licensee may commence ground-disturbing activities authorized by the License and special
use authorization no sooner than 60 days following the date the Licensee files the Forest Service
special use authorization with the Commission, unless the Commission prescribes a different
commencement schedule.
In the event there is a conflict between any provisions of the License and Forest Service special
use authorization, the special use authorization shall prevail to the extent that the Forest Service,
in consultation with the Commission, deems necessary to protect and use National Forest System
lands and resources.
Condition No. 2 – Forest Service Approval of Final Design
Prior to undertaking activities on National Forest System lands and easements, the Licensee shall
obtain written approval from the Forest Service for all final design plans for project components
that the Forest Service deems as affecting or potentially affecting National Forest System lands
and resources. As part of such prior written approval, the Forest Service may require
adjustments in final design plans and facility locations to preclude or mitigate impacts and to
assure that the project is compatible with on-the ground conditions. Should the Forest Service,
the Commission, or the Licensee determine that necessary changes are a substantial change; the
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Licensee shall follow the procedures of Article 2 of the license. Any changes to the license made
for any reason pursuant to Article 2 or Article 3 shall be made subject to any new terms and
conditions the Secretary of Agriculture may make pursuant to section 4(e) of the Federal Power
Act.
Condition No. 3 – Approval of Changes
Notwithstanding any license authorization to make changes to the Project, when such changes
affect National Forest System lands and easements the Licensee shall obtain written approval
from the Forest Service prior to making any changes in any constructed Project features or
facilities, or in the uses of Project lands and waters or any departure from the requirements of
any approved exhibits filed with the Commission. Following receipt of such approval from the
Forest Service, and a minimum of 60-days prior to initiating any such changes, the Licensee
shall file a report with the Commission describing the changes, the reasons for the changes, and
showing the approval of the Forest Service for such changes.
The Licensee shall file a copy of this report with the Forest Service at the same time it is filed
with the Commission. This condition does not relieve the Licensee from other requirements of
this license.
Condition No. 4 – Consultation
Each year during the 60-days preceding the anniversary of this license, or as arranged with the
Forest Service, the Licensee shall consult with the Forest Service regarding measures needed to
ensure protection and use of the National Forest System lands and resources affected by the
Project. At least 30 days in advance of the meeting the Licensee shall provide notice of the
upcoming meeting to the Forest Service.
Representatives from the National Marine Fisheries Service, U.S. Fish and Wildlife Service,
Alaska Department of Fish and Game, interested tribes, other agency representatives, and other
interested parties concerned with operation of the Project may attend the meeting.
The goal of the meeting is to share information. Consultation will include, but not be limited to
•A status report regarding implementation of license conditions
•Results of any monitoring studies performed over the previous year in formats agreed to
by the Forest Service and the Licensee during development of the resource management
plans
•Review of any non-routine maintenance
•Discussion of any foreseeable changes to Project facilities or features
•Discussion of any revisions or modifications to resource management plans approved as
part of the license
•Discussion of needed measures for species newly listed as threatened, endangered, or
sensitive, changes to existing management plans that may no longer be warranted due to
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delisting of species, or to incorporate new information about a species requiring
protection
•Discussion of current year maintenance plans and operation and maintenance activities
planned for the next calendar year
•Review and discussion of reservoir management, inundation and instream flow
schedules from the previous year and for the next calendar year
•Discussion of any planned pesticide use.
Within 60-days following such consultation, the Licensee shall file with the Commission
evidence of the consultation with any recommendations made by the Forest Service.
During the first several years of license implementation, it is likely that more consultation than
just one Annual Meeting will be required, given that this is a new project that will be undergoing
construction.
The Forest Service reserves the right, after notice and opportunity for comment, to require
changes in the Project and its operation through modification of the Section 4(e) conditions to
accomplish protection and use of National Forest System lands and resources.
Condition No. 5 - Compliance with USDA Regulations and Other Laws
The Licensee shall comply with the regulations of the Department of Agriculture for activities on
National Forest System (NFS) lands, and all applicable Federal, State, county, and municipal
laws, ordinances, or regulations regarding the area or operations on or directly affecting NFS
lands, to the extent those laws, ordinances or regulations are not preempted by federal law.
Condition No. 6 – Surrender of License or Transfer of Ownership
Prior to any surrender of this license, Licensee shall provide assurance acceptable to the Forest
Service that Licensee will restore any project area directly affecting National Forest System
lands to a condition satisfactory to Forest Service upon or after surrender of the license, as
appropriate. To the extent restoration is required, Licensee must prepare a restoration plan
identifying the measures to be taken to restore National Forest System lands including financial
mechanisms to ensure performance of the restoration measures.
In the event of a transfer of the license or sale of the project, the Licensee shall assure, in a
manner acceptable to the Forest Service, that the Licensee or transferee will provide for the costs
of surrender and restoration. If deemed necessary by the Forest Service to evaluate Licensee's
proposal, Licensee must conduct an analysis to Forest Service specifications, using experts
approved by the Forest Service, to estimate the costs associated with surrender and restoration of
any project area affecting National Forest System lands. In addition, the Forest Service may
require Licensee to pay for an independent audit of the transferee to help the Forest Service
determine whether the transferee has the financial ability to fund the surrender and restoration
work specified in the analysis.
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Condition No. 7- Protection of United States Property
The Licensee, including any agents or employees of the Licensee acting within the scope of their
employment, shall exercise diligence in protecting from damage the land and property of the
United States covered by and used in connection with this license.
Condition No. 8 – Self Insurance
The Licensee shall indemnify, defend, and hold the United States harmless for any violations
incurred under any laws and regulations applicable to, or judgments, claims, penalties, fees, or
demands assessed against the United States caused by, or costs, damages, and expenses incurred
by the United States caused by, or the releases or threatened release of any solid waste,
hazardous substances, pollutant, contaminant, or oil in any form in the environment related to the
construction, maintenance, or operation of the Project works or of the works appurtenant or
accessory thereto under the license.
The Licensee’s indemnification of the United States shall include any loss by personal injury,
loss of life or damage to property caused by the construction, maintenance, or operation of the
Project works or of the works appurtenant or accessory thereto under the license.
Indemnification shall include, but is not limited to, the value of resources damaged or destroyed;
the costs of restoration, cleanup, or other mitigation; fire suppression or other types of abatement
costs; third party claims and judgments; and all administrative, interest, and other legal costs.
Upon surrender, transfer, or termination of the license, the Licensee’s obligation to indemnify
and hold harmless the United States shall survive for all valid claims for actions that occurred
prior to such surrender, transfer or termination.
Condition No. 9 - Damage to Land, Property, and Interests of the United States
The Licensee, including any agents or employees of the licensee acting within the scope of their
employment, has an affirmative duty to protect the land, property, and interests of the United
States from damage arising from the Licensee's construction, maintenance, or operation of the
Project works or the works appurtenant or accessory thereto under the license. The Licensee's
liability for fire and other damages to National Forest System lands shall be determined in
accordance with the Federal Power Act and standard Form L-2 Articles 22 and 24.
Condition No. 10 - Risks and Hazards on National Forest System Lands
As part of the occupancy and use of the Project area, the Licensee has a continuing responsibility
to reasonably identify and report all known or observed hazardous conditions on or directly
affecting National Forest System (NFS) lands or easements within the Project boundary that
would affect the improvements, resources, or pose a risk of injury to individuals. Licensee will
abate those conditions, except those caused by third parties or related to the occupancy and use
authorized by the License. Any non-emergency actions to abate such hazards on NFS lands shall
be performed after consultation with the Forest Service. In emergency situations, the Licensee
must notify the Forest Service of its actions as soon as possible, but not more than 48 hours, after
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such actions have been taken. Whether or not the Forest Service is notified or provides
consultation, the Licensee shall remain solely responsible for all abatement measures performed.
Other hazards should be reported to the appropriate agency as soon as possible.
Condition No. 11 - Access
The Forest Service reserves the right to use or permit others to use any part of the licensed area
on National Forest System lands for any purpose, provided such use does not interfere with the
rights and privileges authorized by this license or the Federal Power Act.
Condition No. 12 - Maintenance of Improvements
The Licensee shall maintain all its improvements and premises on National Forest System lands
or easements to standards of repair, orderliness, neatness, sanitation, and safety acceptable to the
Forest Service. The Licensee shall comply with all applicable Federal, State, and local laws,
regulations, including but not limited to, the Federal Water Pollution Control Act, 33 U.S.C.
1251 et seq., the Resources Conservation and Recovery Act, 42 U.S.C. 6901 et seq., the
Comprehensive Environmental Response, Control, and Liability Act, 42 U.S.C. 9601 et seq., and
other relevant environmental laws, as well as public health and safety laws and other laws
relating to the siting, construction, operation, maintenance of any facility, improvement, or
equipment.
Condition No. 13 – Boundary Markers and Survey
The Licensee shall avoid disturbance to all public land survey monuments, private property
corners, and forest boundary markers. In the event that any such land markers or monuments on
National Forest System lands are destroyed by an act or omission of the Licensee, in connection
with the use and/or occupancy authorized by this license, depending on the type of monument
destroyed, the Licensee shall reestablish or reference same in accordance with (1) the procedures
outlined in the "Manual of Instructions for the Survey of the Public Land of the United States,"
or (2) the specifications of the Forest Service. Further, the Licensee shall ensure that any such
official survey records affected are amended as provided by law.
Condition No. 14 – Pesticide and Herbicide Use Restrictions
Herbicides may not be used to control undesirable woody and herbaceous vegetation, and aquatic plants,
and pesticides may not be used to control undesirable insects, rodents, non-native fish, etc., on National
Forest System lands without the prior written approval of the Forest Service. The Licensee must submit a
request for approval of planned uses of herbicides and pesticides. The request must cover annual planned
use and be updated as required by the Forest Service. The Licensee shall provide information essential
for review in the form specified by the Forest Service.
The Licensee must provide at a minimum the following information
•whether pesticide applications are essential for use
•specific locations of use
•specific herbicides and pesticides proposed for use
•application rates
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•dose and exposure rates
•safety risks and timeframes for application.
Exceptions to this schedule may be allowed only when unexpected outbreaks of pests require control
measures that were not anticipated at the time the report was submitted. In such an instance, an
emergency request and approval may be made.
Pesticide use will be excluded from National Forest System (NFS) lands within 500 feet of known
locations of the Rough-skinned newt, and Forest Service Special Status or culturally significant plant
populations. Application of pesticides must be consistent with Forest Service riparian conservation
objectives.
On NFS lands the Licensee shall use only those materials registered by the U.S. Environmental Protection
Agency for the specific purpose planned. The Licensee must strictly follow label instructions in the
preparation and application of herbicides and pesticides and disposal of excess materials and containers.
Condition No. 15 – Revision of Forest Service 4(e) Terms and Conditions
The Forest Service reserves the right, after notice and opportunity for comment, to require
changes in the Project and its operation through revision of the Section 4(e) conditions to
accomplish protection and use of National Forest System lands and resources.
The Forest Service also reserves the right to modify these conditions, if necessary, to respond to
any significant changes that warrant a revision of these conditions, for example, a Final
Biological Opinion issued for this Project by the National Marine Fisheries Service or United
States Fish and Wildlife Service or certifications issued for this Project by the State of Alaska..
Condition No. 16 – Signs
The Licensee shall consult with the Forest Service prior to erecting any signs on National Forest
System lands and easements relating to this license. The Licensee must obtain the approval of
the Forest Service as to the location, design, size, color, and message. The Licensee shall be
responsible for maintaining all Licensee erected signs to neat and presentable standards
Condition No. 17 – Additional National Forest System Lands
If the Licensee proposes ground-disturbing activities on or affecting National Forest System
lands that were not analyzed in the Commission’s Environmental Impact Statement, the
Licensee, in consultation with the Forest Service, shall determine the scope of work and potential
for Project-related effects, and whether additional information is required to proceed with the
planned activity.
The Licensee shall conduct or fund the necessary environmental analysis including, but not
limited to, scoping, site-specific resource analysis, and cumulative effects analysis sufficient to
meet the criteria set forth in Forest Service regulations for National Environmental Policy Act
(NEPA) compliance in existence at the time the process is initiated. The Licensee may refer to
or rely on previous NEPA analysis for the activity to the extent the analysis is not out of date as
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determined by the Forest Service. Contractors used by the Licensee to conduct the NEPA
process must be approved by the Forest Service in advance of initiating the work.
Additional lands authorized for use by the Licensee in a new or amended special use
authorization shall be subject to laws, rules, and regulations applicable to the National Forest
System. The terms and conditions of the Forest Service special use authorization are enforceable
by the Forest Service under the laws, rules, and regulations applicable to the National Forest
System.
Condition 18 - Use of Explosives
In the use of explosives, the Licensee shall exercise the utmost care not to endanger life or
property and shall comply with Federal, State and local laws and ordinances. The Licensee shall
contact the Forest Service prior to blasting to obtain the requirements of the Forest Service. The
Licensee shall be responsible for all damages resulting from the use of explosives and adopt
precautions to prevent damage to surrounding objects. The Licensee shall furnish and erect
special signs to warn the public of the Licensee's blasting operations. The Licensee shall place
and maintain such signs, so they are clear to the public during all critical periods of blasting
operations.
The Licensee shall store all explosives in compliance with all applicable Federal, State and local
laws and ordinances.
When using explosives on National Forest System lands, the Licensee shall adopt precautions to
prevent damage to landscape features and other surrounding objects. When directed by the
Forest Service, the Licensee shall leave trees within an area designated to be cleared as a
protective screen for surrounding vegetation during blasting operations. The Licensee shall
remove and dispose of trees so left when blasting is complete. When necessary, and at any point
of special danger, the Licensee shall use suitable mats or other approved methods to smother
blasts.
Condition No. 19 – Resource Management Plans
Within one year of license issuance, and in consultation with the Forest Service and applicable
Federal and State agencies, the Licensee shall file with the Commission plans addressing specific
resource issues and management objectives covered by the Chugach National Forest Land and
Resource Management Plan, and an implementation schedule.
The Licensee shall submit the draft plans for Forest Service review and approval, prior to
submitting the plans to the Commission. The Licensee shall provide at least 90 days for Forest
Service review and approval before the filing deadline in the license. Upon Commission
approval, the Licensee shall implement the Plans. The required plans include:
• Construction Plan
• Erosion and Sediment Control Plan
• Fire Prevention Plan
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• Hazardous Materials Plan
• Historic Properties Management Plan
• Reservoir Management and Inundation Plan
• Scenery Management Plan
• Solid Waste and Wastewater Plan
• Spoils Disposal Plan
• Aquatic Invasive Species Management Plan
• Vegetation Management Plan Spoil Disposal Plan
• Terrestrial and Aquatic Invasive Species Management Plan
• Threatened, Endangered, Proposed for Listing, and Sensitive Species Plan
• Vegetation Management Plan
• Wildlife Mitigation and Monitoring Plan
Condition No. 20 - Environmental Compliance Monitor
Several important items require monitoring during the construction phase of the project. To
ensure adherence to license conditions, mitigation measures, and other environmental aspects of
project construction, the Forest Service will require the Licensee to provide a qualified
environmental compliance monitor to oversee the project during major construction activities
(e.g. vegetative or land disturbing, spoil producing, blasting activities). Items to be monitored
include but are not limited to those stated in the Resource Management Plans listed in Condition
No. 19.
The compliance monitor is a liaison between the Forest Service and Licensee. The compliance
monitor should have the authority to stop work or issue change orders in the field should
conditions so warrant. The compliance monitor should be a third-party contractor independent
of the Licensee, subject to approval by both the Licensee and the Forest Service. Once major
construction activities are complete the compliance monitor will no longer be needed.
Condition No. 21 - Iditarod National Historical Trail
The Forest Service has a planned route for a segment of the Iditarod National Historic Trail that
will be built near the power plant facility. The access road for the Grant Lake outlet and the
tunnel/penstock will have to cross this planned trail alignment. The following conditions apply
due to the proximity of the trail and project infrastructure:
a.Within one year of license issuance and prior to construction, the Licensee shall
coordinate with the Forest Service to ensure that planned hydroelectric facilities
minimize adverse impacts to the planned location of the Iditarod National Historic Trail
and 100-foot wide easement. The Licensee shall coordinate with the Forest Service on
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design and development of the access route, focusing on the access road and Iditarod
National Historic Trail intersection.
b.Licensee must ensure that the construction and maintenance of the access road
minimizes adverse impacts to the trail alignment and 100-foot wide easement for the trail.
Concentration of flows from road construction must be mitigated to the extent possible so
that the trail remains intact and functional. Licensee must coordinate road drainage
structure design with the Forest Service to ensure increased drainage is accounted for and
incorporated into trail design and construction. Based on the current trail design,
increases in number and size of trail drainage structures necessitated from concentrated
roadway flows is the responsibility of the Licensee. If drainage issues on the road impact
the trail and easement the Licensee will be responsible for all maintenance and
reconstruction on the trail associated with the damage event.
c.Licensee must coordinate with the Forest Service regarding the intersection location
between the penstock and the trail alignment and 100-foot easement. Licensee shall
ensure that trail function, operability, and sustainability remain intact during project
construction and throughout the life of the license. If construction of the penstock
located near the powerhouse imposes additional construction costs for either the trail or
the trail bridge, Licensee will pay these additional costs.
d.During and after construction for a period of five years the Licensee will remove any
trees that blow down across the Iditarod National Historic Trail alignment due to
construction of the hydroelectric facilities (access road, detention pond, penstock and
tunnel, powerhouse, etc.).
e.Licensee shall provide Forest Service with road access to Grant Lake for administrative
activities, including, but not limited to trail maintenance, fire response, monitoring, and
law enforcement purposes.
f. The scenery management plan (Condition No. 19) must address minimizing views of
project facilities from the Iditarod National Historic Trail. The Plan should address
directing security lighting toward the ground to limit effects of light pollution, developing
revegetation plans for construction sites, determining color palates for project
infrastructure, describing processes for agency coordination for maintenance activities,
and monitoring views of project infrastructure over the license term.
Licensee shall coordinate with the Forest Service on measures to prevent public entrance
to project facilities from the Iditarod National Historic Trail.
Condition No. 22 - Reroute of Iditarod National Historical Trail
If, at any point during design, construction, and operation of the hydroelectric facility it becomes
necessary to reroute any portion of the Iditarod National Historic Trail to accommodate the
facility the following condition will apply:
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1. The Licensee must develop a plan for the Iditarod National Historic Trail reroute in
consultation with the Forest Service, Bureau of Land Management (National Historic
Trail Administrator), and State of Alaska Department of Natural Resources (DNR). The
plan must be approved by the Forest Service. The plan shall ensure that all trail
infrastructure developed by the Licensee as part of the rerouted Iditarod National Historic
Trail system meets applicable standards of quality set by the Forest Service, if the
Licensee or its assigns occupies an interest in the Project facilities. The plan must include
an implementation schedule and coordination procedures for design, construction, and
maintenance of the rerouted portion of the Iditarod National Historic Trail
segments from Vagt Lake, crossing Grant Creek, and north of Grant Creek to where the
rerouted trail joins with the original trail alignment. This must be accomplished within
two years of when the need for the reroute is identified. Components of this work
include:
a.Licensee shall work with the State of Alaska DNR and the Forest Service to
secure to the Forest Service a 100-foot-wide easement for the rerouted section of
the Iditarod National Historic Trail from the State of Alaska.
b.Licensee shall complete a design narrative for the rerouted trail segments
according to Forest Service specifications. The design narrative will describe the
rerouted sections of trail including tread width, length, number and kind of trail
structures needed, bridge, and other specific trail details to be included in the
design. The design narrative will include an estimated cost of construction. The
Forest Service must approve the design narrative prior to start of detailed design
of trail or bridge construction. The Licensee shall design and construct all trail
segments that deviate from the existing planned trail alignment and easement
using Forest Service trail construction and engineering standards identified in the
Forest Service Directives and the National Strategy for Sustainable Trail Systems.
The trail will be designed for pedestrian, bicycling, and pack and saddle stock
uses. Trail design and construction must incorporate the Iditarod National Historic
Trail design standards. Trail location must be approved by the Forest Service in
advance of construction.
c.The Licensee shall conduct geotechnical and hydrologic investigations
according to
Forest Service engineering specifications to ensure that the proposed bridge
location over Grant Creek is feasible for construction and can be maintained in
perpetuity. The investigation report shall be reviewed and approved by the Forest
Service prior to approval of the bridge location. The final proposed bridge
location must be approved by the Forest Service.
d.If the reroute requires moving the bridge from its planned location, then the
Licensee must construct a bridge across Grant Creek that meets Forest Service
engineering specifications and Iditarod National Historic Trail design standards.
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Approval of the bridge design by the Forest Service is required prior to
construction.
e.The Licensee shall submit to the Forest Service an as-built survey for the entire
trail reroute, using minimum mapping requirements set forth by the State of
Alaska Department of Natural Resources for the Iditarod National Historic Trail
segments crossing State of Alaska managed lands. The as-built survey must be
completed and submitted for Forest Service approval within one year of
completion of the construction of the rerouted trail segments. The as-built survey
shall depict the centerline of the 100foot wide easement. All surveying and
platting shall meet Forest Service engineering specifications.
f.Contractors used by the Licensee to construct trail reroute facilities must adhere
to the designs and locations approved by the Forest Service. The Licensee shall
make accommodation for Forest Service representatives to inspect the work
during construction to ensure compliance with design requirements. Should the
Forest Service representatives, during inspection, detect deviations from the
design requirements, the Licensee shall promptly act to cause their contractor to
correct any deviations in the form of re-work and use of corrected construction
methodologies. The Forest Service shall inspect the constructed facilities prior to
the termination of the contract(s) to ensure compliance with approved designs.
g.Should annual and long-term maintenance costs of the reroute exceed those
anticipated for the Forest Service planned route the Licensee will be responsible
for annual maintenance, deferred maintenance, long term repairs and
replacements of assets, and condition surveys as well as health and safety
operations of the rerouted trail segment and trail bridge for the duration of the
license.
i. Trail maintenance tasks include removing blowdown annually and after
any major storm events, brushing (4-year cycle), tread maintenance and
repair, drainage maintenance and repair, and trail structure maintenance
and repair.
ii. Condition surveys must be completed once every five years following
Forest Service standards or when conditions or events warrant.
The trail bridge at Grant Creek will be inspected once every four years following the
Chugach National Forest’s condition survey schedule by an individual certified by the
Region 10 bridge program manager. Additionally, an emergency condition survey must
be completed if any unforeseen structural damage occurs to the bridge. Annual
maintenance needs will also be completed, this may include adding gravel to the bridge
approach, replacing damaged railing, replacing deck boards, etc.