HomeMy WebLinkAbout3.6 Grant Lk WQ-Hydrology Final Report June 2014 FINAL
Grant Lake Hydroelectric Project (FERC No. 13212)
Water Resources Study –
Water Quality, Temperature and Hydrology
Final Report
Prepared for
Kenai Hydro, LLC
Prepared by
C. Sauvageau and A. Scott
McMillen, LLC
June 2014
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 i June 2014
TABLE OF CONTENTS
1 Introduction ..............................................................................................................................1
2 Study Objectives.......................................................................................................................5
2.1. Water Quality and Temperature ...........................................................................................5
2.2. Hydrology ............................................................................................................................5
3 Study Area ................................................................................................................................6
4 Methods .....................................................................................................................................9
4.1. Water Quality and Temperature ...........................................................................................9
4.1.1. Sampling Procedure ........................................................................................... 11
4.1.2. Field Sampling Quality Assurance Procedures .................................................. 11
4.2. Hydrology ..........................................................................................................................12
5 Results .....................................................................................................................................15
5.1. Water Quality and Temperature .........................................................................................15
5.2. Hydrology ..........................................................................................................................34
6 Conclusions .............................................................................................................................40
6.1. Water Quality and Temperature .........................................................................................40
6.2. Hydrology ..........................................................................................................................42
7 Variances from FERC-Approved Study Plan and Proposed Modifications ....................42
7.1. Water Quality and Temperature .........................................................................................42
7.2. Hydrology ..........................................................................................................................42
8 References ...............................................................................................................................43
Appendices
Appendix 1: Grant Lake and Grant Creek Temperature Records
1a: Grant Creek Temperature Records – 2013
1b: Grant Lake Temperature Records – 2013
1c: Historical Grant Creek Temperature Records – 1982; 2009-2012
1d: Historical Grant Lake Temperature Records – 2010-2012
Appendix 2: Grant Creek Discharge Records
2a: Grant Creek Discharge Records – 2013
2b: Grant Creek Discharge Records – 1948-1958; 1982-1983; 2013
Appendix 3: Grant Lake Dissolved Oxygen Profiles
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 ii June 2014
List of Tables
Table 4.1-1. Water quality parameters sampled in Grant Lake, Grant Creek and Trail Lakes
Narrows, CY 2013. ............................................................................................................... 10
Table 5.1-1. Water quality sampling results for the Trail Lake Narrows (TLN) site – 2013. 1,2 . 16
Table 5.1-2. Water quality sampling results for the Grant Creek GC100 site – 2009, 2010, and
2013. 1,2 ................................................................................................................................. 17
Table 5.1-3. Water quality sampling results for the Grant Creek GC200 site – 2009, 2010, and
2013. 1,2 ................................................................................................................................. 18
Table 5.1-4. Water quality sampling results for the Grant Creek GC300 site – 2009, 2010, and
2013....................................................................................................................................... 19
Table 5.1-5. Water quality sampling results for the Grant Lake GLOut site – 2009, 2010, and
2013. 1,2 ................................................................................................................................. 21
Table 5.1-6. Water quality sampling results for the Grant Lake GLTS site – 2009, 2010, and
2013. 1,2 ................................................................................................................................. 22
Table 5.2-1. Grant Creek ratings based on 2013 stage-discharge relationship at GC200. .......... 35
Table 5.2-2. Grant Creek (GC200) discharge measurement summary for the 2013 season. ...... 36
Table 5.2-3. Detailed discharge calculation at cross section near upper Grant Creek Canyon
Reach..................................................................................................................................... 39
Table 5.2-4. Detailed discharge calculation at cross section near lower Grant Creek Canyon
Reach..................................................................................................................................... 40
List of Figures
Figure 1.0-1. Natural resources study area. ................................................................................... 3
Figure 3.1-1. Water quality, temperature, and hydrology study locations, 2013. ......................... 7
Figure 4.1-1. GC 200 enclosure, data logger, bubbler line, and staff gage installation............... 13
Figure 5.1-1. Daily mean water temperatures all Grant Creek main channel sites – 2013. ........ 23
Figure 5.1-2. Comparison of daily mean water temperatures upstream and downstream Grant
Creek sample stations – 2013. .............................................................................................. 24
Figure 5.1-3. Comparison of daily mean water temperatures between two off channel rearing
locations and the main channel of Grant Creek – 2013. ....................................................... 25
Figure 5.1-4. Comparison of daily mean water temperatures in Grant Lake near the proposed
intake structure – 2013. ......................................................................................................... 27
Figure 5.1-5. Daily mean water temperature profiles in Grant Lake near the proposed intake
structure................................................................................................................................. 29
Figure 5.1-6. Historical water temperature profiles in Grant Lake from a) AEIDC and b) HDR.
............................................................................................................................................... 30
Figure 5.1-7. A comparison of daily mean water temperatures for shallow depths (< 3m) of
Grant Lake and Grant Creek in a) 2009 and b) 2013. ........................................................... 31
Figure 5.1-8. A comparison of daily mean water temperatures for Grant Lake at a depth of 1.5
meter and Grant Creek – 2013. ............................................................................................. 32
Figure 5.1-9. A comparison of daily mean water temperatures for Grant Creek, CY 2009 – 2013.
............................................................................................................................................... 34
Figure 5.2-1. Comparison of historical and 2013 mean daily flow records ................................ 37
Figure 5.2-2. 15 minute stage hydrograph during accretions studies April 4-5, 2013 ................ 38
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 iii June 2014
Acronyms and Abbreviations
ADCP Acoustic Doppler Current Profiler
ADEC Alaska Department of Environmental Conservation
AEIDC Arctic Environmental Information Data Center
CFR Code of Federal Regulations
DLA Draft License Application
EPA Environmental Protection Agency
FERC Federal Energy Regulatory Commission
KHL Kenai Hydro, LLC
LA License Application
MW megawatt
NAVD 88 North American Vertical Datum of 1988
NGVD 29 National Geodetic Vertical Datum of 1929
NOI Notice of Intent
NTU Nephelometric Turbidity Units
ORP oxygen reduction potential
PAD Pre-Application Document
PM&E protection, mitigation and enhancement
Project Grant Lake Hydroelectric Project
QA quality assurance
RPD Relative Percent Difference
TLN Trail Lake Narrows
TBM temporary benchmark
USFS U.S. Department of Agriculture, Forest Service
USGS U.S. Department of the Interior, Geological Survey
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 iv June 2014
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FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 1 June 2014
Water Resources Study –
Water Quality, Temperature, and Hydrology
Final Report
Grant Lake Hydroelectric Project (FERC No. 13212)
1 INTRODUCTION
On August 6, 2009, Kenai Hydro, LLC (KHL) filed a Pre-Application Document (PAD; KHL
2009), along with a Notice of Intent (NOI) to file an application for an original license, for a
combined Grant Lake/Falls Creek Project (Federal Energy Regulatory Commission [FERC] No.
13211/13212 [“Project” or “Grant Lake Project”]) under Part I of the Federal Power Act (FPA).
On September 15, 2009, FERC approved the use of the Traditional Licensing Process (TLP) for
development of the License Application (LA) and supporting materials. As described in more
detail below, the proposed Project has been modified to eliminate the diversion of water from
Falls Creek to Grant Lake. The Project will be located near the community of Moose Pass,
Alaska in the Kenai Peninsula Borough, approximately 25 miles north of Seward, Alaska and
just east of the Seward Highway (State Route 9).
The Water Resources Study Plan was designed to address information needs identified in the
PAD, during the TLP public comment process, and through early scoping conducted by FERC.
The following study report presents existing information relative to the scope and context of
potential effects of the Project. This information will be used to analyze Project impacts and
propose protection, mitigation, and enhancement measures in the draft and final LA’s for the
Project.
The Project is located near the community of Moose Pass, approximately 25 miles north of
Seward and just east of the Seward Highway. It lies within Section 13 of Township 4 North,
Range 1 West; Sections 1, 2, 5, 6, 7, and 18 of Township 4 North, Range 1 East; and Sections
27, 28, 29, 31, 32, 33, 34, 35, and 36 of Township 5 North, Range 1 East, Seward Meridian (U.S.
Geological Survey [USGS] Seward B-6 and B-7 Quadrangles).
The proposed Project would be composed of an intake structure at the outlet to Grant Lake, a
tunnel, a surge tank, a penstock, and a powerhouse. It would also include a tailrace detention
pond, a switchyard with disconnect switch and step-up transformer, and an overhead or
underground transmission line. The preferred alternative would use approximately 15,900 acre-
feet of water storage during operations between pool elevations of approximately 692 and up to
703 feet North American Vertical Datum of 1988 (NAVD 88)1.
1 The elevations provided in previous licensing and source documents are referenced to feet mean sea level in
NGVD 29 [National Geodetic Vertical Datum of 1929] datum, a historical survey datum. The elevations presented
in the Grant Lake natural resources study reports are referenced to feet NAVD 88 datum, which results in an
approximate +5-foot conversion to the NGVD 29 elevation values.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 2 June 2014
An intake structure would be constructed approximately 500 feet east of the natural outlet of
Grant Lake. An approximate 3,200-foot-long, 10-foot diameter horseshoe tunnel would convey
water from the intake to directly above the powerhouse at about elevation 628 feet NAVD 88.
At the outlet to the tunnel a 360-foot-long section of penstock will convey water to the
powerhouse located at about elevation 531 feet NAVD 88. An off-stream detention pond will be
created to provide a storage reservoir for flows generated during the rare instance when the units
being used for emergency spinning reserve are needed to provide full load at maximum ramping
rates. The tailrace would be located in order to minimize impacts to fish habitat by returning
flows to Grant Creek upstream of the most productive fish habitat.
Two concepts are currently being evaluated for water control at the outlet of Grant Lake. The
first option would consist of a natural lake outlet that would provide control of flows out of
Grant Lake. A new low level outlet would be constructed on the south side of the natural outlet
to release any required environmental flows when the lake is drawdown below the natural outlet
level. The outlet works would consist of a 48-inch diameter pipe extending back into Grant
Lake, a gate house, regulating gate, controls and associated monitoring equipment. The outlet
would discharge into Grant Creek immediately below the natural lake outlet.
In the second option, a concrete gravity diversion structure would be constructed near the outlet
of Grant Lake. The gravity diversion structure would raise the pool level by a maximum height
of approximately 2 feet (from 703 to 705 feet NAVD 88), and the structure would have an
overall width of approximately 120 feet. The center 60 feet of the structure would have an
uncontrolled spillway section with a crest elevation at approximately 705 feet NAVD 88.
Similar to the first option, a low level outlet would be constructed on the south side of the natural
outlet to release any required environmental flows when the lake is drawn down below the
natural outlet level. The outlet works would consist of a 48-inch diameter pipe extending back
into Grant Lake, a gate house a regulating gate, controls, and associated monitoring equipment.
The outlet would discharge into Grant Creek immediately below the diversion structure.
Figure 1.0-1 displays the global natural resources study area for the efforts undertaken in 2013
and 2014 along with the likely location of Project infrastructure and detail related to land
ownership in and near the Project area. Further discussions related to specifics of the
aforementioned Project infrastructure along with the need and/or feasibility of the diversion dam
will take place with stakeholders in 2014 concurrent with the engineering feasibility work for the
Project. Refined Project design information will be detailed in both the Draft License
Application (DLA) and any other ancillary engineering documents related to Project
development. The current design includes two Francis turbine generators with a combined rated
capacity of approximately 5.0 megawatts (MW) with a total design flow of 385 cubic feet per
second. Additional information about the Project can be found on the Project website:
http://www.kenaihydro.com/index.php.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 5 June 2014
2 STUDY OBJECTIVES
Together with existing information, the goal of the Water Resources Study effort was to provide
baseline information, and where applicable, information on alternative flow regimes, which will
inform an assessment of potential Project impacts on water resources. The impact assessments
and potential protection, mitigation, and enhancement measures will be presented in the draft and
final LAs.
The goals of this suite of studies were to provide supporting information on the potential
resource impacts of the proposed Project that were identified during development of the PAD,
public comment, and FERC scoping for the LA, as follows:
Impact of Project construction and operation (lake level fluctuations, changes in flow) on
Grant Lake and Grant Creek water quality, hydrology, and water temperature.
Impact of Project construction and operation on water quality of Lower Trail Lake and
Trail Creek.
Specific study objectives and quantitative objectives are presented below for each individual
study component.
2.1. Water Quality and Temperature
Water quality studies were conducted to further document baseline conditions in Grant Lake,
Grant Creek and Trail Lake Narrows. Describing the baseline conditions in each of these
systems is necessary for understanding how Project operations may affect water quality. Water
quality parameters were chosen for analysis based on several factors: parameters sampled in
previous studies, parameters that may be affected by land use practices in the Project area, and
fresh water criteria that have been developed by the Alaska Department of Environmental
Conservation (ADEC) for the growth and propagation of fish, shellfish, other aquatic life, and
wildlife.
Temperature monitoring was conducted to further document baseline conditions in Grant Lake
and Grant Creek prior to any Project activities. Obtaining baseline information on the seasonal
temperature regime was necessary to provide data necessary to assess potential Project impacts
to stream temperatures under various operational scenarios. These temperature data are also
necessary to provide input data required for the planning of mitigation measures.
2.2. Hydrology
Hydrology studies were conducted in order to further document baseline flow conditions in
Grant Lake and Grant Creek. Describing the baseline conditions in each of these systems is
necessary for understanding how alterations to seasonal flow regimes might affect aquatic
resources. Results will be used in conjunction with historical data to support the concurrently
conducted instream flow study, the engineering feasibility effort, and other related studies. A
major goal for the study was to establish, calibrate, and maintain a rating curve at the historical
U.S. Department of the Interior, Geological Survey (USGS) Station currently referred to as
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 6 June 2014
GC200. Another goal was to determine if Grant Creek gains or loses water within the Canyon
Reach (Reaches 5 and 6). To meet these goals, the study had two components as follows:
Installation of staff gage and continuously recording stage recorder at the historical
USGS gage station on Grant Creek (GC200). Continue discharge measurements at
GC 200 to generate and validate an updated rating curve and extend the stream flow
period of record.
Take discharge measurements at Grant Lake outlet and near the proposed powerhouse
location during stable, low-flow conditions to determine if Grant Creek gains or loses
water with in the Canyon Reach.
Provide input data required for the planning of mitigation measures.
3 STUDY AREA
The Project area is located near the town of Moose Pass, Alaska (pop. 206), approximately 25
miles north of Seward, Alaska (pop. 3,016), just east of the Seward Highway (State Route 9);
this highway connects Anchorage (pop. 279,671) to Seward. The Alaska Railroad parallels the
route of the Seward Highway and is also adjacent to the Project area. The town of Cooper
Landing is located 24 miles to the northwest and is accessible via the Sterling Highway (State
Route 1), which connects to the Seward Highway approximately 10 miles northwest of Moose
Pass.
Grant Creek is approximately 5,180 feet long (approximately one mile) and flows west from the
outlet of Grant Lake to the narrows between Upper and Lower Trail lakes (Figure 3.1-1). The
Grant Creek watershed is approximately 44 square miles and the watershed contains Grant Lake
as well as a portion of the Kenai Mountain Range with glacier capped peaks as high as 5,500
feet. Grant Creek has a mean annual flow of 193 cfs, with an average gradient of 207 feet per
mile; its substrate includes cobble and boulder alluvial deposits and gravel shoals (Ebasco 1984).
The stream is 25 feet wide, on average. In its upper half, the stream passes through a rocky
gorge with three substantial waterfalls; in its lower half, the stream becomes less turbulent as it
passes over gravel shoals and diminishing boulder substrate (Ebasco 1984). Grant Creek’s
mobile substrate is comprised of well packed, unsorted broken angular rock, and there is minimal
rounded material. Some fines may be found in small eddies and a few backwaters.
Inlet Creek is the predominant stream in the upper portion of the watershed and drains melting
alpine glaciers and snow from the nearby mountains into Grant Lake on the eastern banks. Grant
Lake itself sits in the lower portion of the watershed. Grant Lake encompasses two almost
separate bathymetric lake basins, which are separated by a shallow submerged ridge at the
“narrows” that connects the two basins at right angles (Ebasco 1984). The deepest point within
the lower basin is approximately 262 feet deep and the upper basin is 283 feet deep (Ebasco
1984).
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 9 June 2014
4 METHODS
4.1. Water Quality and Temperature
Water Quality
The field methods were designed to document current water quality conditions at selected
locations and depths within Grant Lake, Grant Creek and Trail Lake Narrows (Figure 3.1-1).
Two sites were sampled in Grant Lake (GLTS and GLOut); three sites in Grant Creek (GC100,
GC200, GC300); and one site in Trail Lake Narrows (TLN). Sampling frequencies varied for
each site and included sampling one sampling event in August for the Grant Lake and Grant
Creek sites and three sampling events (June, August and September) for the Trail Lake Narrows
site. Parameters sampled at these study locations as well as ADEC criteria are specified in Table
4.1-1.
Sampling was conducted at a single depth of approximately 1.0 meter at all creek sites and at an
approximate depth of 1.8 meters in Trail Lake Narrows. Grab samples were taken for lab
analyses with a van dorn style sampler from a well mixed portion of the stream and Narrows
sites. The same van dorn style sampler was used at lake sites Samples were collected at the
surface (>1 meter) and mid-level depths at the GLOut site and surface, middle and bottom (>1
meter off substrate) depths at the GLTS site. In situ sampling was done using a Hydrolab®
MiniSonde 5 multi-parameter probe at all sites. In situ sampling was done at a depth of
approximately 1.5 meters on Grant Creek and at Trail Lake Narrows. The Grant Lake in situ
sampling was conducted on a vertical transect at one meter increments from the surface to the
bottom of the water column.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 10 June 2014
Table 4.1-1. Water quality parameters sampled in Grant Lake, Grant Creek and Trail Lakes Narrows, CY
2013.
Parameter Units ADEC Water Quality Standards*
Alkalinity
(CaCO3)mg/L no criteria
Total dissolved
solids (TDS)mg/L ≤ 1000 mg/l
Total suspended
sediment (TSS)mg/L no criteria
Kjeldahl
Nitrogen mg/L no criteria
Nitrate/Nitrite mg/L 10 mg/l
Orthophosphate mg/L no criteria
Total
phosphorous mg/L no criteria
Lead µg/L 16.4 µg/l (acute); 0.64 µg/l (chronic)
Hardness mg/L no criteria
Calcium mg/L no criteria
Magnesium mg/L no criteria
Sodium mg/L <2.55 mg/l
Potassium mg/L no criteria
Low level
mercury µg/L 1.4 µg/l (acute); 0.77 µg/l (chronic)
Fluoride mg/L no criteria
Chloride mg/L 860 mg/l (acute); 230 mg/l (chronic)
Sulfate mg/L no criteria
pH S.U.≥6.5 to ≤8.5
Temperature °C
May not exceed 20°C at any time; maximum
temperatures may not exceed, where applicable:
migration routes: ≤15°C; spawning areas:
≤13°C; rearing areas: ≤ 15°C; egg/fry
incubation: ≤13°C.
Dissolved oxygen
(DO)mg/L
>7mg/l and <17 mg/l in waters used by
anadromous fish; >5mg/l and <17 mg/l for
waters not used by anadromous fish
Specific
Conductivity mS/cm no criteria
Oxygen
Reduction
Potential (ORP)
mV no criteria
Turbidity NTU
Not to exceed 25 NTU above natural
conditions. For all lake waters, may not exceed
5 NTU above natural conditions.
* Based on the following water use class/subclass: (1) fresh water/(C) growth
and propagation of fish, shellfish, other aquatic life, and wildlife
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 11 June 2014
4.1.1. Sampling Procedure
Every attempt was made to adhere to the following sampling procedures during collection of all
samples. These procedures included:
Calibrate multi-probe per manufacturer’s instructions before every field visit.
Multi-probe data collection was recorded in a hand held data storage device as well as
written as field notes from instantaneous readings in the field. To insure the best accuracy
of the in situ sampling and to alleviate concerns during past sampling efforts, two multi-
probe units were deployed at each site and the results were compared and averaged.
For grab sample water collections, all sample bottles were labeled with the specific
parameter, date, and location.
Samples were collected from the actively flowing channel at stream sites into the van dorn
style sampler and then transferred to laboratory-supplied bottles. The sampler was
flushed with onsite stream water from each site prior to collection. Field personnel
approached the site and remained downstream of the sampling point to avoid disturbing
stream sediments.
Sampling work was done from a boat at both lake sites. Grab sample locations were
located and identified with a hand-held GPS.
Lake grab samples were collected using a van dorn style collector to obtain vertical
individual water samples at preselected depths for both sites.
All samples (stream and lake) were placed on ice as soon as possible after collection and
delivered to the laboratory within the approved holding time constraints.
4.1.2. Field Sampling Quality Assurance Procedures
Field sampling quality assurance (QA) ensured that field procedures produced high quality data,
with 5 to 10 percent of sampling efforts commonly dedicated to QA. Field duplicates were used.
A field duplicate consisted of a second sample collected immediately after the initial sample in
the field. The field duplicate assessed variability in lab results that may be attributed to
collection and/or lab analytical errors. All samples examined using the QA duplicate assessment
method fell within the analytical lab’s acceptable Relative Percent Difference (RPD) of +/- 20
percent.
Field duplicates were taken during two of the three field visits for surface water quality grab
samples, both time at the Trail Lake Narrows site. Lab analysis was done by SGS North
America Inc. (SGS) located in Anchorage, Alaska. SGS provided all sampling bottles with the
appropriate preservation techniques (e.g., acid preservation) for individual parameters, specified
appropriate quantities of water needed for all of the analyses, and conducted the analyses. Grab
sample protocol was utilized for each water quality sampling event. In the field, all water
samples were labeled, preserved if necessary, placed on ice and transported to SGS’s Anchorage
lab. The laboratory analyzed all samples and field duplicates for parameters listed in Table 4.1-1
except for the flowing in situ parameters: 1) temperature, 2) dissolved oxygen, 3) specific
conductance, and 4) oxygen reduction potential (ORP). Turbidity and pH were measured both in
the field and by the lab. Chain-of-custody forms were used during each sampling trip to
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 12 June 2014
document all field, delivery, and laboratory personnel handling sample containers. Samples
were analyzed within the Environmental Protection Agency (EPA) recommended holding times.
Temperature
Stream temperature data loggers were re-established at four previously monitored sites (GC 100,
GC 200, GC 250, and GC 300) on Grant Creek (HDR 2000 and 2010). Two additional
temperature data loggers were also established within the upper and lower canyon reach of Grant
Creek (GC 500 and GC 600) as well as at two off-channel locations (GC 200-oc and GC 250-oc)
where rearing salmonids were observed (Figure 3.1-1). The historical continuous temperature
monitoring site in Grant Lake (GLTS) was also re-established. HOBO® Water Temp Pro v2
(ModelU22-001) temperature loggers were installed at all stream and lake locations to
continuously monitor temperature in 2013. The HOBO Pro V2 logging thermistor has an
operating range of -40 to 50 ºC, and is accurate to 0.2 ºC over 5 0 ºC. At the eight Grant Creek
locations, each logger was placed in weighted, protective housings on the bottom of the channel
and safeguarded by cables attached to shoreline trees. At the Grant Lake site, a thermistor string
was installed in June 2013 along a vertical transect to a depth of 20 meters. HOBO® Pro v2 data
loggers were attached to the string at ten distinct sampling depths of 0.2, 0.5, 1.5, 3.0, 6.0, 9.0,
12.0, 15.0, 18.0 and 19.5 meters. All data loggers were set to record temperature at 1-hour
intervals.
Water temperatures were monitored from early April through late September 2013. Continuous
temperature monitoring at all sites will continue through the 2013-2014 winter. Thermistor
downloads will be conducted in the late spring or summer of 2014. This supplemental data
documenting the winter period will be distributed to stakeholders and included in the Water
Resources portion of Exhibit E in the LA.
4.2. Hydrology
Following guidelines from previously permitted installation activities, a stream gaging station
was installed at GC 200 that consisted of a staff gage and a continuous stage data logger. Each
stage measurement device was individually anchored to the stream bank and near the shoreline to
avoid catching floating debris. The primary data logger used for this study was a USGS-
approved bubbler/pressure transducer system manufactured by Design Analysis Associates, Inc.
rated to an accuracy of 0.02 percent. Two Onset® U20-001-04 level loggers (accuracy of 0.075
percent) were also installed to serve as a secondary stage recording system. Onset® level loggers
are non-vented devices, and therefore must also record barometric pressure to accurately track
changes in water levels. Both of these data loggers accurately recorded pressure, which were
then related to the water surface elevation of the staff gage. The data loggers were set to record
water depth at 15-minute intervals.
The staff gage was mounted vertically in the stream channel to measure water depth for the full
range of flow conditions. The Design Analysis data logger was housed in a shoreline enclosure
with the bubbler line protected in conduit and 2”galvanized pipe within the wetted channel. The
in-channel Onset® level logger was attached to the staff gage and housed in 2” ABS pipe for
protection and to attenuate fluctuations in water surface elevations. The Onset® level logger
needed for barometric compensations was stored in the USGS gaging house adjacent to the
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 13 June 2014
shoreline. Figure 4.1-1 shows multiple views of the gage enclosure, data logger, bubbler line,
and staff gage installation.
Figure 4.1-1. GC 200 enclosure, data logger, bubbler line, and staff gage installation.
During field visits, manual readings of the staff gages and the time were recorded. These manual
staff gage readings were compared with the stage values provided by the data logger during the
same time interval.
A differential survey was performed for each of the data loggers and the staff gage to check on
vertical stability during gage operation. A cross sectional survey of the channel at the gage
location was also conducted in April 2013. Multiple temporary benchmarks (TBM) were
established at the stream gage location to provide differential vertical datum checks for the gage
equipment to monitor movement. The Grant Creek stream gage for the 2013 season is tied into
an elevation established arbitrary datum based on local TBMs.
Data loggers were operated during ice free months (i.e., April-October). The stream gage was
visited every 6-8 weeks through late-September. The field team download data from the data
loggers and took a discharge measurement to build and calibrate the rating curve. Additional
discharge measurements were taken by the instream flow team when wading conditions were
safe. During winter site maintenance station visits, activities will include battery change-outs and
staff gage recordings. This supplemental data documenting the winter period will be distributed
to stakeholders and included in the Water Resources portion of Exhibit E in the LA.
Instantaneous Discharge Measurements
Collecting instantaneous discharge data from Grant Creek required two methods depending upon
flow conditions. It is not possible to wade Grant Creek during flow events above 400 cfs.
Potential instantaneous discharge measurement methods included the following:
Wading method (low to medium-flow events on Grant Creek).
Acoustic Doppler Current Profiler (ADCP) method (medium to high-flow events on
Grant Creek).
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 14 June 2014
All instantaneous discharge measurements yielded comparable results and followed field
procedures laid out in Rantz et al (1982). The stream gage site was visited at least monthly, and
instantaneous discharge measurements were taken until freeze-up as stream conditions permitted,
to establish and calibrate the rating curve.
Wading Method – Instantaneous discharge measurements were taken using a top-setting wading
rod with a Swoffer current meter.
Procedures for taking discharge measurements using a current meter in ice-free conditions are
outlined below.
1. Visually check wading rod and current meter for damage. Repair damage to equipment
and replace batteries as necessary.
2. Calibrate and test the current meter at the start of each field event according to
manufacture protocols.
3. Anchor survey measuring tape tautly across the stream perpendicular to the direction of
stream flow and attach it on either side of the stream with the low numbers of the tape on
the left side of the stream. Calculate the width of the entire stream cross section.
4. Determine the spacing of the vertical partial sections (referred to as “verticals”). This is
typically accomplished by splitting the entire stream cross section into approximately 25
to 35 verticals. The number of verticals will be based on an estimated distribution of the
discharge across the entire cross section. Space the verticals to meet the USGS objective
that no vertical partial section should contain more than 10 percent of the total discharge.
The ideal measurement is one in which no partial section contains more than 5 percent of
the total discharge. However, the placement of verticals should never be closer than a
horizontal distance of 0.20 feet.
5. The person wading in the stream will call out the location of the first vertical with respect
to the surveyor’s tape to the person on shore who is recording data (data recorder). The
station or vertical location is recorded to the nearest 0.1 feet.
6. Using the wading rod, the person wading in the stream will measure water depth at that
vertical to the nearest 0.05 foot. The wading person will call out this depth reading to the
data recorder and adjust the height of the current meter on the top-set wading rod
according to the depth at that vertical. For water columns less than or equal to 2.5 feet
deep, a single velocity measurement at 60 percent of the water column height will be
collected. If the water is more than 2.5 feet deep, measurements should be made at 20
and 80 percent of the water-column height.
7. The person wading will stand downstream of the survey measuring tape, facing upstream
and holding the wading rod vertical in the water with the current meter facing directly
into the current. The wading person should stand to the side, rather than directly behind
the meter, to avoid influencing velocity readings. Occasionally flow at a vertical may not
be perpendicular to the tape due to a rock upstream or other flow restrictions. If the
obstruction cannot be cleared and the flow is more than 20 degrees off perpendicular, the
person in the stream should orient the meter directly into the flow and call out the angle
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FERC No. 13212 15 June 2014
of flow with respect to perpendicular. A correction will be applied to the velocity
measurement from the vertical when calculating the discharge.
8. The person wading will observe visual output of velocity measurements at each vertical.
Velocity measurements averaged over a 40 second period before being recorded. The
person recording data will record this and other appropriate information on the field form.
9. Repeat above procedure at each vertical.
ADCP Method - During higher flows when wading was not a safe option due to deep and fast-
water conditions, the ADCP method was employed to obtain discharge measurements. An
ADCP determines the velocity of water by sending sound pulses into the water column and
measuring the change in frequency of the sound pulses. When this change in frequency (i.e.
Doppler Shift) is reflected back to the ADCP transducer, it can be translated into water velocity.
The ADCP also has an acoustic component within the transducer to measure water depth and
horizontal distance. The ADCP sends sound pulses to the bottom of the stream channel and
measures the travel time for each sound pulse to return to the ADCP. By mounting the ADCP to
a small watercraft, it can be ferried across the channel to measure channel width, depth, and
velocity verticals. Once the ADCP has effectively completed these measurements, discharge can
be calculated using the conventional velocity-area method.
5 RESULTS
5.1. Water Quality and Temperature
Water Quality
Baseline water quality sampling for this Project was conducted during multiple years. Historical
water quality data was collected by various entities and summarized for earlier Project scoping
efforts (Ebasco 1984). Limited sampling was conducted in 2009 and 2010 and expanded
sampling was conducted in 2013 to supplement and expand the previous sampling efforts. All
2013 sample results were compared to standards presented in the Alaska Department of
Environmental Conservation’s 18 AAC 70 Water Quality Standards Publication – Amended
April 8, 2012 to establish whether standards were being met.
Sampling efforts in 2013 were conducted during three trips including June, August and
September. A total of twenty-four parameters were monitored during the sampling period. Ten
of the parameters monitored have established water quality standards (see Table 4.1-1).
Trail Lakes Narrows
Three sampling events were conducted at this site (June, August, and September 2013). Table
5.1-1 provides the results of 2013 sampling for this site. No parameter sampled exceeded water
quality standards during any sampling event. Specific parameters of aquatic interest (dissolved
oxygen, pH and temperature) met standards for all sampling periods. Compared to the Grant
Lake and Grant Creek sites, Trail Lakes Narrows routinely had the highest turbidity readings of
all sites in 2013. This site was also the only site sampled for diesel and gas components, both of
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which were below detection levels for all three sample events. Some minor variability was noted
between in situ and laboratory pH values at the TLN site. This discrepancy is most likely due to
the pH field probe accuracy, which tends to be less reliable than lab measurements.
Table 5.1-1. Water quality sampling results for the Trail Lake Narrows (TLN) site – 2013. 1,2
Hydrolab Readings
Hydrolab #1
June 2013
Hydrolab #2
June 2013
Hydrolab #1
August 2013
Hydrolab #2
August 2013
Hydrolab #1
Sept 2013
Hydrolab #2
Sept 2013
Temp °C 9.05 9.08 11.81 11.94 8.39 8.51
Sp. Cond mS/cm 0.08 0.08 0.07 0.04 0.07 0.07
Dissolved Oxygen % Sat 102.5 102.5 102.9 102.1 87.4** 102.6
Dissolved Oxygen mg/l 11.88 11.85 11.19 11.09 10.8** 11.82
ORP mV 399 385 526 315 387 335
pH S.U.7.51 7.63 7.63 6.32 7.06 6.60
Turbidity NTU 9.4 * * * 9.4 *
Depth m 1.6 1.7 2.0 2.0 1.0 1.0
Analytical Lab Results DUP DUP
pH S.U.7.60 7.60 6.90 7.20 7.10
Turbidity NTU 8.5 8.8 13.0 11.0 11.0
T. Hardness mg/l 38.9 41.2 33.0 36.8 33.8
T. Alkalinty mg/l 25.1 25.5 18.7 22.0 21.8
TDS mg/l 44 49 43 54 50
TSS mg/l 3.1 5.7 11.3 4.1 3.8
T. Nitrate+Nitrite mg/l 0.35 0.39 0.14 0.27 0.25
K. Nitrogen mg/l ND ND ND ND ND
T. Phosphorus mg/l ND ND 0.03 ND 0.01
Orthophosphate mg/l ND ND 0.02 0.02 0.02
Chloride mg/l 0.32 0.32 0.21 0.21 0.21
Fluoride mg/l ND ND ND ND ND
Sodium mg/l 1.17 1.15 0.91 0.99 1.05
Calcium mg/l 13.6 14.4 11.3 12.5 11.4
Magnesium mg/l 1.2 1.3 1.2 1.4 1.3
Potassium mg/l 0.53 0.59 ND 0.62 0.56
Sulfate mg/l 16.0 16.0 13.1 15.0 15.0
Lead µg/l 0.2 ND 0.40 0.30 0.23
Low level Mercury µg/l 0.0017 0.0016 0.0036 0.0022 0.0022
Gas Range Organics mg/l ND ND ND ND ND
Diesel Range Organics mg/l ND ND ND ND ND Notes
ND: not detected
1. Probe manufacturer confirmed LDO sensor was malfunctioning – Hydrolab #1 values not accurate
2. Faulty turbidity probe
Grant Creek
There were three sampling sites on Grant Creek, all located below the canyon reach. Each site
was sampled once in August 2013. The 2013 results indicated all parameter levels were below
ADEC standards. Little variability between these creek sites was observed in 2013. Turbidity
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values ranged from 4.0-4.6 NTUs, dissolved oxygen ranged from 10.95-11.02 mg/l, and pH
values from 7.00-7.18 S.U.
Three sites initially established in 2009 were sampled again in 2010 and 2013. Results from the
three years of sampling are presented in Tables 5.1-2 through 5.1-4. No parameter sampled
exceeded water quality standards during the three sampling events. Grant Creek results showed
little variation between years for most parameters. Differences in sampling results for dissolved
oxygen between 2009/2010 and 2013 may be a result of equipment calibration or faulty sensor
issues with the equipment used in 2009-2010. The 2013 sampling used duplicate multi-probe in
situ instruments in an attempt to alleviate this problem and insure accurate results.
Table 5.1-2. Water quality sampling results for the Grant Creek GC100 site – 2009, 2010, and 2013. 1,2
Hydrolab Readings Jun‐09 Aug‐09 Jun‐10 Aug‐13
Temp °C 9.44 12.32 8.55 12.65
Sp. Cond mS/cm 0.08 0.09 0.09 0.06
Dissolved Oxygen % Sat 68.7 77.5 91.9 102.5
Dissolved Oxygen mg/l 7.85 8.29 10.74 10.95
ORP mV na na 212 422
pH S.U.7.39 7.4 7.23 7.18
Turbidity NTU 0.77 10.10 1.14 4.10
Depth m na na na 1.9
Lab Analyses
pH S.U.na na na 7.00
Turbidity NTU na na na 4.1
T. Alkalinity mg/l 24 23 25 20.4
T. Hardness mg/l na na na 34.2
TDS mg/l 53.8 62.5 52.0 45.0
TSS mg/l 0.70 2.49 0.71 1.78
T. Nitrate/Nitrite mg/l 0.46 0.30 0.27 0.18
K. Nitrogen mg/l ND ND ND ND
Orthophosphate mg/l ND ND ND ND
T. Phosphorus mg/l ND ND 0.022 ND
Chloride mg/l na na 0.293 0.225
Fluoride mg/l na na ND ND
Sodium mg/l na na 1.10 0.98
Calcium mg/l na na 12.6 11.6
Magnesium mg/l na na 1.28 1.24
Potassium mg/l na na 0.52 0.53
Sulfate mg/l na na 18.0 15.5
Lead µg/l 0.597 ND 0.597 ND
LL Mercury µg/l ND 0.0015 ND 0.0015
Notes
1 na: not sampled
2 ND: not detected
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Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 18 June 2014
Table 5.1-3. Water quality sampling results for the Grant Creek GC200 site – 2009, 2010, and 2013. 1,2
Hydrolab Readings Jun‐09 Aug‐09 Jun‐10 Aug‐13
Temp °C 7.4 11.26 8.51 12.46
Sp. Cond mS/cm na 0.07 0.09 0.06
Dissolved Oxygen % Sat 60.9 75.1 92.3 101.5
Dissolved Oxygen mg/l 7.31 8.22 10.79 10.89
ORP mV na na 216 408
pH S.U.7.66 7.39 7.39 7.02
Turbidity NTU 0.75 11.10 1.17 4.00
Depth m na na na 1.9
Lab Analyses
pH S.U.na na na 7.00
Turbidity NTU na na na 4.0
T. Alkalinity mg/l 25.0 23.5 25.5 20.6
T. Hardness mg/l na na na 34.4
TDS mg/l 60 44 50 51
TSS mg/l 0.8 3.4 0.7 2.9
T. Nitrate/Nitrite mg/l 0.455 0.292 0.269 0.190
K. Nitrogen mg/l ND ND ND ND
Orthophosphate mg/l ND ND ND ND
T. Phosphorus mg/l ND ND ND ND
Chloride mg/l na na 0.284 0.225
Fluoride mg/l na na ND ND
Sodium mg/l na na 1.14 1.18
Calcium mg/l na na 13.3 11.7
Magnesium mg/l na na 1.26 1.25
Potassium mg/l na na 0.52 0.54
Sulfate mg/l na na 17.9 15.1
Lead µg/l 3.09 ND ND ND
LL Mercury µg/l ND 0.0016 ND 0.0013
Notes
1 na: not sampled
2 ND: not detected
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 19 June 2014
Table 5.1-4. Water quality sampling results for the Grant Creek GC300 site – 2009, 2010, and 2013.
Hydrolab Readings Jun‐09 Aug‐09 Jun‐10 Aug‐13
Temp °C 7.47 11.49 8.53 12.45
Sp. Cond mS/cm 0.09 0.09 0.09 0.06
Dissolved Oxygen % Sat 61.3 77.1 93.7 102.8
Dissolved Oxygen mg/l 7.34 8.40 10.94 11.02
ORP mV na na 209 421
pH S.U.7.30 7.72 7.52 7.09
Turbidity NTU 0.8 11.9 1.0 4.6
Depth m na na na 1.8
Lab Analyses
pH S.U.na na na 7.00
Turbidity NTU na na na 4.6
T. Alkalinity mg/l 25.0 23.0 25.3 20.7
T. Hardness mg/l na na na 34.9
TDS mg/l 57.5 60.0 54.0 45.0
TSS mg/l 0.8 2.9 0.7 3.1
T. Nitrate/Nitrite mg/l 0.42 0.32 0.36 0.18
K. Nitrogen mg/l ND ND ND ND
Orthophosphate mg/l na na ND ND
T. Phosphorus mg/l 0.023NDNDND
Chloride mg/l na na 0.29 0.22
Fluoride mg/l na na ND ND
Sodium mg/l na na 1.1 1.0
Calcium mg/l na na 13.0 11.9
Magnesium mg/l na na 1.3 1.3
Potassium mg/l na na 0.5 0.5
Sulfate mg/l na na 17.9 15.3
Lead µg/l 0.392NDNDND
LL Mercury µg/l na 0.0020 ND 0.0018 Notes
1 na: not sampled
2 ND: not detected
Grant Lake
The 2013 sampling was repeated at the two original sites (HDR 2009, 2010). Results from the
three years of sampling are presented in Tables 5.1-5 and 5.1-6. There were two distinct
sampling sites, site GLTS representing typical lake 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 location. Both sites were sampled in August 2013.
Each site was sampled vertically at selected depths for grab analyses and at one meter depth
intervals for in situ parameters. No parameter sampled exceeded water quality standards during
the August sampling event.
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In situ sampling during 2013 at the GLTS site was done from the surface down to a bottom depth
of 17 meters. Dissolved oxygen ranged from 103.6 percent saturation at the surface to
94.5percent saturation at the bottom. A mid-depth (8.0 meters) reading was 100.9 percent
saturation. Dissolved oxygen concentrations for these same depths ranged from a surface
reading of 11.15 mg/l, increasing to 11.76 mg/l at the bottom. A mid-depth concentration was
11.18 mg/l. The pH levels ranged from 7.26 S.U. at the surface to 7.42 S.U. at the bottom.
Instantaneous temperature readings ranged from 12.3 °C at the surface to 6.24 °C at the bottom.
A mid-depth temperature was 10.98 °C.
In situ sampling during 2013 at the GLOut site was done from the surface down to a mid-depth
of 5 meters. Dissolved oxygen ranged from 103.3 percent saturation at the surface to 98.0
percent saturation at the mid depth. Dissolved oxygen concentrations for these same depths
ranged from a surface reading of 11.14 mg/l to 10.69 mg/l at the mid depth. The pH levels
ranged from 6.33 S.U. at the surface to 6.79 S.U. at the mid-depth. The instantaneous
temperature readings ranged from 12.2 °C at the surface to 11.6 °C at the mid-depth.
Data for the two lakes sites was initially collected in 2009 and repeated in June of 2010. Results
appear similar for nearly all parameters where three years of data exists. Differences in sampling
results for dissolved oxygen between 2009/2010 and 2013 may be a result of poor equipment
calibration or faulty sensor issues with the equipment used in 2009/2010. The 2013 sampling
used duplicate multi-probe instruments in an attempt to alleviate this problem and insure
accurate results.
Differences at sites GLout and GLTS in dissolved oxygen and pH values were also noted
between the 2013 results and the 2009-2010 results. It is unclear whether this is a result of
fluctuating annual conditions or faulty sampling equipment as noted earlier. However, Grant
Lake water quality data summarized by Ebasco (1984) indicate that the 2013 results are more in
line with historical results.
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Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 21 June 2014
Table 5.1-5. Water quality sampling results for the Grant Lake GLOut site – 2009, 2010, and 2013. 1,2
Hydrolab Readings Jun‐09 Jun‐09 Aug‐09 Aug‐09 Jun‐10 Jun‐10 Aug‐13 Aug‐13
Depth m 0‐Surf 4‐Mid 0‐Surf 6‐Mid 0‐Surf 6‐Mid 0‐Surf 3‐Mid
Temp °C 7.95 7.27 14.87 11.49 9.38 9.30 12.17 11.81
Sp. Cond mS/cm na na 0.09 0.09 0.08 0.08 0.08 0.08
Dissolved Oxygen % Sat 64.4 63.8 55.2 52.3 75.5 74.0 103.3 101.9
Dissolved Oxygen mg/l 7.64 7.70 5.57 5.71 8.61 8.50 11.14 11.08
ORP mV na na na na 73 29 334 332
pH S.U.7.27 7.37 7.24 7.24 6.98 7.06 6.28 6.59
Turbidity NTU 0.82 na 4.18 na 1.46 1.14 4.50 5.10
Lab Analyses
pH S.U.na na na na na na 7.10 7.00
Turbidity NTU na na na na na na 4.5 5.1
T. Alkalinity mg/l 23.8 23.2 24.0 24.0 26.0 25.6 20.8 20.9
T. Hardness mg/l na na na na na na 35.6 36.5
TDS mg/l 51.3 40.0 32.5 47.5 57.0 64.0 46.0 52.0
TSS mg/l 0.60 0.50 1.96 2.77 ND 0.75 2.08 2.75
T. Nitrate/Nitrite mg/l 0.414 0.651 0.268 0.298 0.311 0.344 0.206 0.175
K. Nitrogen mg/l ND ND ND ND ND ND ND ND
Orthophosphate mg/l ND ND ND ND ND ND ND ND
T. Phosphorus mg/l ND ND ND ND ND ND ND ND
Chloride mg/l na na na na 0.298 0.291 0.221 0.220
Fluoride mg/l na na na na ND ND ND ND
Sodium µg/l na na na na 1.16 1.12 0.95 0.95
Calcium µg/l na na na na 13.8 13.4 11.5 11.6
Magnesium µg/l na na na na 1.32 1.27 1.18 1.2
Potassium µg/l na na na na 0.53 0.53 0.51 0.51
Sulfate mg/l na na na na 17.6 17.9 15.3 15.4
Lead µg/l ND ND ND ND ND ND 0.24 ND
LL Mercury µg/l ND ND 0.0014 0.0021 0.0011 0.0011 0.0011 0.0014 Notes
1 na: not sampled.
2 ND: not detected.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY Grant Lake Hydroelectric Project Kenai Hydro, LLC FERC No. 13212 22 June 2014 Table 5.1-6. Water quality sampling results for the Grant Lake GLTS site – 2009, 2010, and 2013. 1,2 Hydrolab ReadingsJun‐09 Jun‐09 Jun‐09 Aug‐09 Aug‐09 Aug‐09 Jun‐10 Jun‐10 Jun‐10 Aug‐13 Aug‐13 Aug‐13Depth m0‐Surf 10‐Mid 19‐Bot 0‐Surf 9‐Mid 17‐Bot 0‐Surf 6‐Mid 17‐Bot 0‐Surf 9‐Mid 17 ‐ BotTemp °C8.64 5.41 4.33 14.66 10.37 6.09 9.36 9.25 4.41 12.29 10.98 6.24Sp. Cond mS/cm0.09 0.09 0.09 0.09 0.09 0.1 na na na 0.08 0.08 0.09Dissolved Oxygen % Sat68.4 61.3 55.5 56.2 52.1 48.4 76.2 74.1 66.5 103.6 100.9 94.5Dissolved Oxygen mg/l7.96 7.74 7.2 5.63 5.82 5.99 8.73 8.52 8.63 11.15 11.18 11.76ORP mVna na na na na na 91 26 65 319 320 327pH S.U.7.43 7.49 7.06 7.56 7.2 7.06 6.68 6.82 6.43 7.26 7.42 7.42Turbidity NTU0.6 na na 3.87 na 4.8 0.81 1.14 1.17 3.9 7.8 4.8Lab AnalysespHS.U.na na na na na na na na na 6.80 6.80 6.80TurbidityNTUna na na na na na na na na 3.9 7.8 4.8T. Alkalinitymg/l23.5 24.5 24 24.8 24.6 25.4 25.8 25.3 25.8 20.2 20.9 22.6T. Hardnessmg/lna na na na na na na na na 36.1 36.9 39.7TDSmg/l75.0 68.8 61.3 46.3 48.8 45.0 67.0 64.0 63.0 43.0 45.0 49.0TSSmg/l0.7 1.0 0.8 1.9 2.6 2.8 0.5 ND 0.7 2.7 2.6 4.2T. Nitrate/Nitritemg/l0.42 0.42 0.41 0.28 0.30 0.32 0.30 0.31 0.30 0.17 0.19 0.31K. Nitrogenmg/lND ND ND ND ND ND ND ND ND ND ND NDOrthophosphatemg/lND ND ND ND ND ND ND ND ND ND 0.01 NDT. Phosphorusmg/lND0.021NDNDNDNDNDNDNDND0.020.04Chloridemg/lna na na na na na 0.30 0.29 0.47 0.22 0.22 0.27Fluoridemg/lna na na na na na ND ND ND ND ND NDSodiummg/lna na na na na na 1.16 1.15 1.16 0.95 0.96 1.08Calciummg/lna na na na na na 13.5 13.3 13.4 11.6 11.6 13.0Magnesiummg/lna na na na na na 1.3 1.3 1.3 1.2 1.2 1.3Potassiummg/lna na na na na na 0.53 0.51 0.52 0.51 0.53 0.52Sulfatemg/lna na na na na na 18.0 17.9 17.9 15.1 15.4 16.9Leadµg/lND1.1NDNDNDNDNDNDNDNDNDNDLL Mercuryµg/lND ND ND 0.0015 0.0016 0.0017 ND ND ND 0.0011 0.0015 0.0015 Notes 1 na: not sampled 2 ND: not detected
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
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FERC No. 13212 23 June 2014
Temperature
2013 Results
A total of nine temperature sites were monitored in 2013 including six main channel Grant Creek
sites, two off-channel Grant Creek sites and one Grant Lake site. All of these sites provide water
temperature data for the 2013 season. Appendices 1a and 1b summarize the 2013 temperature
record at all of the sampling locations.
Grant Creek
Six sites were monitored in 2013 on Grant Creek. They included four previously established
sites (GC100, GC200. GC250, GC300), two new upstream sites (GC500 and GC600) in the
canyon reach and two off channel sites (ISF 230 and ISF 300) selected based on observed fish
utilization.
Daily mean temperature hydrographs for the six main channel Grant Creek sites are presented in
Figure 5.1-1. Mean daily temperatures at all sites track are very similar to one another with the
exception of GC600 in early to mid April. GC600 is located less than 100 feet from the outlet of
Grant Lake and may be less affected by changes in air temperature when outlet flows are low
and Grant Lake is still under ice cover.
Figure 5.1-1. Daily mean water temperatures all Grant Creek main channel sites – 2013.
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FERC No. 13212 24 June 2014
Winter temperature data was collected at one site (GC200). The January-April 2013 record
indicates that the minimum daily mean water temperature for this period was 0.0 ° C and the
maximum daily mean water temperature for this period was 1.8 ° C. The daily mean average
temperature for January was 1.2 °C; for February it was 1.3 °C; and for March and April it was
0.9 °C. Following the month of April, mean daily temperature values increase through the
month of August (mean monthly average of 12.1 °C), before decreasing once again in September
(mean monthly average of 8.6 °C).
Grant Creek water temperatures demonstrate little inter-station variations in 2013 throughout
longitudinal profile of Grant Creek. Figure 5.1-2 shows a comparison of daily mean water
temperatures between the farthest upstream site (G600) and the farthest downstream site (G100).
As stated earlier GC600 temperatures may be buffered from extreme late winter air temperatures
due to its proximity of releases from the ice covered lake.
Figure 5.1-2. Comparison of daily mean water temperatures upstream and downstream Grant Creek
sample stations – 2013.
Additional stream temperature data was collected at two off site channel locations. These
backwater areas were selected in coordination with members of the Aquatic Resources study
team that detected juvenile salmonids (resident and anadromous) rearing at these two locations.
Figure 5.1-3 shows the results of daily mean temperatures at both off channel sites (GC 200-oc
and GC 250-oc) from June through late September 2013 in comparison to main channel
temperatures. Site GC 200-oc temperatures remained cooler and more stable when compared to
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
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FERC No. 13212 25 June 2014
temperatures recorded at GC 250-oc. The cooler temperatures at GC 200-oc are likely due to
different physical characteristics of site (greater depth, denser canopy cover, and more isolation
from main channel flows) as well as more groundwater influence. In general, both off channel
sites were slightly cooler when compared to main channel temperatures. Although GC 250-OC
was slightly cooler than main channel temperatures, the inter-daily temperature fluctuations still
appeared to follow patterns detected in the main channel. This may be due in part to potential
groundwater influences at each site.
Figure 5.1-3. Comparison of daily mean water temperatures between two off channel rearing locations
and the main channel of Grant Creek – 2013.
Grant Lake
The temperature monitoring site in Grant Lake (GLTS) from the 2009/2010 work was re-
established in the same approximate location for 2013. This site was monitored using a vertical
temperature string which recorded temperatures at ten distinct depth intervals from the surface to
a bottom depth of 19.5 meters.
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FERC No. 13212 26 June 2014
Grant Lake water temperature hydrographs are presented in Figure 5.1-4. The temperature
monitoring results show two distinct seasonal characteristics within Grant Lake. The first
characteristic is that winter water temperatures increased with depth. This trend was noted from
January through mid to late May. The second trend is that summer water temperatures
decreased with depth, starting in June and extending through early September. A maximum
difference of about 10 °C between the surface (0.2 meter) and the deepest sampling node (19.5
meter) was recorded in late July through early August.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY Grant Lake Hydroelectric Project Kenai Hydro, LLC FERC No. 13212 27 June 2014 024681012141618Jan‐1Feb‐1Mar‐1Apr‐1May‐1Jun‐1Jul‐1Aug‐1Sep‐1Oct‐1Nov‐1Dec‐1Temperature (C)DateGrant Lake 0.2m ‐19.0m ‐Mean Daily Lake Temperature, CY 2013GL 0.2mGL 0.5mGL 1.5mGL 3.0mGL 6.0mGL 9.0mGL 12.0mGL 15.0mGL 18.0mGL 19.5m Figure 5.1-4. Comparison of daily mean water temperatures in Grant Lake near the proposed intake structure – 2013.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
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FERC No. 13212 29 June 2014
Figure 5.1-5 displays the seasonal temperature profile of Grant Lake in 2013. A noted
temperature difference from top to bottom does exist throughout the year, but changes appear
subtly during periods of ice cover and become more pronounced during the ice-free season. As
confirmed in Figure 5.1-6, these temperature patterns have been consistent based on historical
temperature profile results (AEIDC 1983; HDR 2009)
Figure 5.1-5. Daily mean water temperature profiles in Grant Lake near the proposed intake structure
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a)
b)
Figure 5.1-6. Historical water temperature profiles in Grant Lake from a) AEIDC and b) HDR.
Temperature results from Grant Lake and Grant Creek indicate lake water temperatures closely
mirror and influence creek water temperatures during periods when the lake is ice-free. The
strongest correlation appears to be between creek temperatures and the upper surface lake depths
(0.2 – 3.0 meters). Figure 5.1-7 shows a comparison of Grant Lake water temperatures from the
four shallow sampling depths compared to Grant Creek (GC200) in 2009 and 2013.
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a)
b)
Figure 5.1-7. A comparison of daily mean water temperatures for shallow depths (< 3m) of Grant Lake
and Grant Creek in a) 2009 and b) 2013.
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FERC No. 13212 32 June 2014
A further review of the data reveals that water temperatures in Grant Lake at a depth of 1.5
meters most closely match Grant Creek water temperatures during ice-free periods (Figure 5.1-
8). For the May-September monitoring period, mean monthly temperatures at GLTS-1.5m and
GC 200 are within 0.5 °C. In the 2013 winter period (January-April), mean monthly
temperatures at GLTS-1.5m are up to 1.5 °C warmer than Grant Creek (GC200) temperatures.
The trend of Grant Creek and GLTS-1.5m water temperatures nearly matching during the ice-
free season is also confirmed by the 2009 temperature monitoring efforts (HDR 2009) and
revealed in Figure 5.1-7.
Figure 5.1-8. A comparison of daily mean water temperatures for Grant Lake at a depth of 1.5 meter and
Grant Creek – 2013.
Instantaneous temperature profiles and continuous temperature monitoring in 1983 (AEIDC
1983) and 2009 (HDR 2009) have been summarized. Appendices 1c and 1d contain all of the
available Grant Creek and Grant Lake temperature data since the 2009 study report was filed.
It should be noted that Grant Lake temperature data presented in this report for the years 2010
through the first half of 2013 were compiled from the thermistor string recovered on June 15,
2013. Although the thermistor string drifted slightly from the GLTS location, these data
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FERC No. 13212 33 June 2014
represent a valid and comparable data set for describing vertical temperature changes in the
lower basin of Grant Lake. Also, Grant Lake temperature data is available at all of the sampling
depths from 2010-2013, but based on the gradual changes in water temperatures by depth, only
surface (1.5 meters), middle (9.0 meters), and near bottom (18.0 meters) temperature records are
provided.
There is very little inter-annual variation of temperatures near the surface of Grant Lake. The
differences in the spring warming period are most likely linked to ice breakup while peak
summer temperatures and declining fall temperatures are responding to ambient air conditions.
Inter-annual variations within the mid-column and bottom of Grant Lake are less pronounced
than at the surface. Peak temperatures at 9.0 meters were found in early August during the 2011
and 2013 seasons, while the 2012 maximum mean daily temperature occurred in early July.
Near the bottom of the Grant Lake monitoring station, daily mean temperatures peak in early to
mid September. Over the three year monitoring period, the 1.5 meters, 9.0 meters, and 18.0
meters stations had annual variations in maximum mean daily temperature values of 1.8 °C, 1.7
°C, and 1.3 °C respectively.
Grant Creek
Grant Creek water temperatures were monitored and summarized in 2009 (HDR 2009). A
thermologger recovered at station GC250 in April 2013 provides continuous temperature data for
the fall of 2009, all of 2010, and for the first days 37 days of 2011. Site GC 200, approximately
450 feet downstream of GC250, has temperature data for last 21 days of December 2012 through
late September 2013.
The trend for Grant Creek temperatures, based on the data set, is to be at or below 2 °C during
the winter months (December through late April). Water temperatures begin to rise sometime in
late April or early May depending upon ice break up in Grant Lake. Water temperatures
continue to rise throughout June and July before peaking sometime between mid-July to mid-
August. Figure 5.1-9 summarizes all of the recent Grant Creek temperature records.
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Figure 5.1-9. A comparison of daily mean water temperatures for Grant Creek, CY 2009 – 2013.
Data indicates that Grant Creek water temperatures, on average in 2010, were warmer (+0.5 °C)
in the winter months and cooler (-3.5 °C) in the summer months when compared to 2013 results.
Grant Creek water temperatures peaked in mid-August 2010 near 13 °C and in late July 2013
near 16 °C. The 2010 and 2013 datasets have limited overlapping data for the fall period.
Although limited, the two years do show a similar late summer trends of slowly decreasing mean
daily temperatures through mid-September before beginning a steady decline. The limited 2009
fall data also mirrors this same steady temperature decline though late November before freeze-
up occurs.
5.2. Hydrology
2013 Stream Gaging
The GC 200 stream gage operated properly during the entirety of the April 2- September 27,
2013 monitoring period. A total of ten discharge measurements were taken to create and validate
the stage-discharge relationship at Grant Creek and provide mean daily flow data from April 3 –
September 27, 2013. The Grant Creek rating table is defined by two stage discharge equations.
As seen in Table 5.2-1, Rating 1LF accurately predicts discharges for gage height values ranging
from 0.30-0.99 feet, while Rating 1HF provides discharge values for stages ranging from 1.00-
3.59 feet. The flow record for the 2013 season is considered to be of excellent reliability, with
10 discharge measurements validating the rating curve within 9.4 percent (Table 5.2-2). The
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FERC No. 13212 35 June 2014
USGS criteria for and excellent stream flow record is that 95 percent of the discharge records are
accurate within 10 percent. Mean daily flow statistics, discharge, and stage hydrographs are
provided in Appendix 2a.
Table 5.2-1. Grant Creek ratings based on 2013 stage-discharge relationship at GC200.
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FERC No. 13212 36 June 2014
Table 5.2-2. Grant Creek (GC200) discharge measurement summary for the 2013 season.
Q Meas # Date
Stream Gage
Water Level
(ft)
Measured
Discharge
(ft3/s)
Calculated
Discharge
(ft3/s)
Percent
Difference
(meas/calc)
Comments
Rating 1 LF
1 4/4/2013 0.45 18.3 18.9 -3.3%
2 4/19/2013 0.41 16.6 16.1 2.8%
3 5/3/2013 0.64 34.3 34.3 0.0%
4 5/9/2013 0.88 59.6 58.4 2.0%
5 5/10/2013 0.93 63.1 64.0 -1.5%
Rating 1 HF
6HF 5/14/2013 1.40 145.5 152.7 -4.7%
7HF 6/12/2013 2.84 694.0 680.4 2.0%
8HF 8/21/2013 2.00 312.2 324.6 -3.8%
9HF 9/27/2013 1.78 257.6 253.7 1.5%
10HF 10/11/2013 1.49 167.4 174.2 -3.9%
Historical Stream Gaging
A summary of USGS stream gaging records at Grant Creek from 1948-1958 and 1982-1983 are
also provided in Appendix 2b. These summarized data include an 11 year average of
mean/minimum/maximum daily flow statistics as well as discharge hydrographs. Based on the
2013 data, mean daily discharges follow a similar pattern as the 11 year average (Figure 5.2-1).
There are two deviations in the 2013 mean daily flow record when compared to the 11 year
record. In late May through the entire month of June, the ascending limb of the hydrograph is
steeper and flows are maintained at a detectably higher volume above the USGS average.
Secondly, the descending limb of the hydrograph shows a detectable increase in stream flows
starting in early September that continues into the middle of the month.
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Figure 5.2-1. Comparison of historical and 2013 mean daily flow records
Accretion Study
April 4- 5, 2013, discharge measurements were taken at cross sections at the top and bottom of
the Canyon Reach. Due to limited daylight and winter conditions, the upper and lower reaches
of the Canyon could not be accessed in a single day. However, as seen in Figure 5.2-2, the
hydrograph for April 4th-5th indicate stable flow conditions. The results show that there was
18.1 cfs and 18.3 cfs at the upstream and downstream segments of the Canyon Reach
respectively (Tables 5.2-3 and 5.2-4). Results of this effort indicate that no water is lost or
gained as it is conveyed down the canyon under low flow conditions. As snowmelt occurs in the
spring and flows begin to increase rapidly, there may be some seeps or small runoff channels that
enter the Canyon Reach. However, the accretion volumes of these seasonal channels are
unlikely to increase flows in the lower section of the Canyon by more than a few cfs.
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FERC No. 13212 38 June 2014
0.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
1.80
2.00
4‐Apr‐13 5‐Apr‐13 6‐Apr‐13 7‐Apr‐13 8‐Apr‐13 9‐Apr‐13 10‐Apr‐13Gage Height (feet)Date
Stage
Figure 5.2-2. 15 minute stage hydrograph during accretions studies April 4-5, 2013
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FERC No. 13212 39 June 2014
Table 5.2-3. Detailed discharge calculation at cross section near upper Grant Creek Canyon Reach.
Stream Name:Grant Creek
Outside
Gage
H350
Recorder
HDR Staff on
LBA
Location:U/S end of Canyon Reach Time Start:11:25 AM 0.45 0.45 -0.37
Q Transect:500' D/S Grant Lake Outlet Time Finish:12:01 PM 0.45 0.45 -0.37
Date:4/5/2013
Field Crew:CS,TR Discharge:18.1
Station Depth Vel 1 Vel 2 Vector Comment Vel. Avg.Width Area Corr. Vel.Cell Q % of Q
22.6 0.00 0.00 LBWE 0.00 0.40 0.00 0.00 0.00 0.00%
23.4 0.30 0.02 0.02 0.90 0.27 0.02 0.01 0.03%
24.4 0.70 0.14 0.14 0.90 0.63 0.14 0.09 0.49%
25.2 1.10 0.39 0.12 0.26 0.80 0.88 0.26 0.22 1.24%
26.0 1.40 0.67 0.67 0.80 1.12 0.67 0.75 4.14%
26.8 1.70 1.01 1.01 0.80 1.36 1.01 1.37 7.57%
27.6 1.90 0.82 0.82 0.80 1.52 0.82 1.25 6.87%
28.4 1.90 0.25 0.25 0.60 1.14 0.25 0.29 1.57%
28.8 1.70 1.01 1.01 0.40 0.68 1.01 0.69 3.79%
29.2 1.30 1.99 1.99 0.60 0.78 1.99 1.55 8.55%
30.0 1.25 1.41 1.41 0.60 0.75 1.41 1.06 5.83%
30.4 1.30 0.88 0.88 0.40 0.52 0.88 0.46 2.52%
30.8 1.10 0.43 0.43 0.60 0.66 0.43 0.28 1.56%
31.6 1.70 0.51 0.51 0.80 1.36 0.51 0.69 3.82%
32.4 1.30 0.73 0.73 0.80 1.04 0.73 0.76 4.18%
33.2 0.80 0.60 0.60 0.80 0.64 0.60 0.38 2.12%
34.0 0.90 0.72 0.72 0.60 0.54 0.72 0.39 2.14%
34.4 0.70 1.10 1.10 0.40 0.28 1.10 0.31 1.70%
34.8 0.65 1.47 1.47 0.40 0.26 1.47 0.38 2.11%
35.2 0.70 2.02 2.02 0.80 0.56 2.02 1.13 6.23%
36.4 0.70 2.67 2.67 0.80 0.56 2.67 1.50 8.24%
36.8 0.60 2.11 2.11 0.40 0.24 2.11 0.51 2.79%
37.2 0.80 1.57 1.57 0.60 0.48 1.57 0.75 4.15%
38.0 0.95 1.43 1.43 0.80 0.76 1.43 1.09 5.99%
38.8 1.05 0.53 0.53 0.80 0.84 0.53 0.45 2.45%
39.6 0.30 0.75 0.75 0.80 0.24 0.75 0.18 0.99%
40.4 0.20 0.69 0.69 0.80 0.16 0.69 0.11 0.61%
41.2 0.20 0.42 0.42 0.80 0.16 0.42 0.07 0.37%
42.0 0.30 0.67 0.67 0.60 0.18 0.67 0.12 0.66%
42.4 0.00 0.00 0.00 1.30 0.00 0.00 0.00 0.00%
44.6 0.00 0.00 0.00 1.50 0.00 0.00 0.00 0.00%
45.4 0.80 0.07 0.07 0.90 0.72 0.07 0.05 0.28%
46.4 0.90 0.07 0.07 1.00 0.90 0.07 0.06 0.35%
47.4 0.80 0.7 0.70 1.00 0.80 0.70 0.56 3.09%
48.4 0.70 0.38 0.38 1.00 0.70 0.38 0.27 1.47%
49.4 0.30 0.54 0.54 1.00 0.30 0.54 0.16 0.89%
50.4 0.50 0.44 0.44 1.00 0.50 0.44 0.22 1.21%
51.4 0.00 0.00 RBWE 0.00 0.50 0.00 0.00 0.00 0.00%
Load M
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 40 June 2014
Table 5.2-4. Detailed discharge calculation at cross section near lower Grant Creek Canyon Reach.
Stream Name:Grant Creek
Outside
Gage
H350
Recorder
HDR Staff on
LBA
Location:D/S end of Canyon Reach Time Start:1:38 PM 0.45 0.45 -0.37
Q Transect:near ISF Transect 430 Time Finish:2:07 PM 0.45 0.45 -0.37
Date:4/4/2013
Field Crew:CS,TR Discharge:18.3
Station Depth Vel 1 Vel 2 Vector Comment Vel. Avg.Width Area Corr. Vel.Cell Q % of Q
4.9 0.00 0.00 LBWE 0.00 0.55 0.00 0.00 0.00 0.00%
6.0 0.30 0.04 0.04 1.30 0.39 0.04 0.02 0.09%
7.5 0.25 0.02 0.02 1.20 0.30 0.02 0.01 0.03%
8.4 0.00 0.00 0.00 1.00 0.00 0.00 0.00 0.00%
9.5 0.00 0.00 0.00 0.80 0.00 0.00 0.00 0.00%
10.0 0.40 0.21 0.21 0.75 0.30 0.21 0.06 0.34%
11.0 0.70 1.15 1.15 0.85 0.60 1.15 0.68 3.74%
11.7 1.00 1.42 1.42 0.70 0.70 1.42 0.99 5.43%
12.4 1.05 1.28 1.28 0.70 0.74 1.28 0.94 5.14%
13.1 1.10 1.92 1.92 0.70 0.77 1.92 1.48 8.07%
13.8 1.30 1.47 1.47 0.70 0.91 1.47 1.34 7.30%
14.5 0.45 1.90 1.90 0.70 0.32 1.90 0.60 3.27%
15.2 0.80 2.23 2.23 0.70 0.56 2.23 1.25 6.82%
15.9 0.75 1.08 1.08 0.70 0.53 1.08 0.57 3.10%
16.6 1.05 0.61 0.61 0.70 0.74 0.61 0.45 2.45%
17.3 1.05 1.97 1.97 0.70 0.73 1.97 1.45 7.91%
18.0 1.05 1.63 1.63 0.70 0.73 1.63 1.20 6.54%
18.7 0.90 1.67 1.67 0.70 0.63 1.67 1.05 5.74%
19.4 0.90 1.07 1.07 0.70 0.63 1.07 0.67 3.68%
20.1 0.70 1.62 1.62 0.70 0.49 1.62 0.79 4.33%
20.8 0.90 1.20 1.20 0.70 0.63 1.20 0.76 4.13%
21.5 0.80 0.95 0.95 0.70 0.56 0.95 0.53 2.90%
22.2 0.60 1.05 1.05 0.70 0.42 1.05 0.44 2.41%
22.9 0.55 1.18 1.18 0.70 0.39 1.18 0.45 2.48%
23.6 0.60 0.72 0.72 0.70 0.42 0.72 0.30 1.65%
24.3 0.65 1.15 1.15 0.70 0.46 1.15 0.52 2.86%
25.0 0.60 0.61 0.61 0.70 0.42 0.61 0.26 1.40%
25.7 0.40 1.01 1.01 0.70 0.28 1.01 0.28 1.54%
26.4 0.50 1.36 1.36 0.70 0.35 1.36 0.48 2.60%
27.1 0.55 0.95 0.95 0.70 0.39 0.95 0.37 2.00%
27.8 0.50 0.47 0.47 0.70 0.35 0.47 0.16 0.90%
28.5 0.50 0.38 0.38 0.70 0.35 0.38 0.13 0.73%
29.2 0.60 0.02 0.02 0.85 0.51 0.02 0.01 0.06%
30.2 0.40 0.11 0.11 0.55 0.22 0.11 0.02 0.13%
30.3 0.00 0.00 0.00 0.50 0.00 0.00 0.00 0.00%
31.2 0.00 0.00 0.00 0.55 0.00 0.00 0.00 0.00%
31.4 0.40 0.01 0.01 0.40 0.16 0.01 0.00 0.01%
32.0 0.50 0.01 0.01 0.55 0.28 0.01 0.00 0.02%
32.5 0.00 0.00 0.00 0.80 0.00 0.00 0.00 0.00%
33.6 0.00 0.00 0.00 0.60 0.00 0.00 0.00 0.00%
33.7 0.20 0.01 0.01 0.70 0.14 0.01 0.00 0.01%
35.0 0.20 0.13 0.13 1.15 0.23 0.13 0.03 0.16%
36.0 0.20 0.04 0.04 1.30 0.26 0.04 0.01 0.06%
37.6 0.00 0.00 RBWE 0.00 0.80 0.00 0.00 0.00 0.00%
Load M
6 CONCLUSIONS
6.1. Water Quality and Temperature
Water Quality
The Grant Lake watershed which includes Grant Creek and Trail Lake Narrows is a high quality
watershed based on ADEC water quality criteria. The Trail Lake Narrows flows directly past
the mouth of Grant Creek and receives additive flow from it to combine with the majority of its
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Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 41 June 2014
existing water coming from Upper Trail Lake. Baseline water quality sampling results from
2009, 2010 and 2013 indicate this watershed has excellent water quality which is to be expected
due to its remote location and pristine condition. Human impacts appear minimal throughout the
watershed. Where impacts are occurring, they are primarily associated with the community of
Moose Pass and the Trail Lakes themselves. In addition to its current excellent water quality, a
comparison of sampling results from the three sampling years for all sites indicates little or no
changes in water quality has occurred over the five year period for nearly all parameters. Two
notable exceptions were dissolved oxygen and pH.
Dissolved oxygen results (both mg/l and percent saturation values) for 2013 were similar to
those collected in 1981 (AEIDC 1983) for Grant Lake but higher in Grant Creek when compared
to the 1981 data. The 2013 and 1981 dissolved oxygen levels were substantially different
(higher) than those collected in 2009 and 2010. A Grant Lake oxygen profile in June 1981
(AEIDC 1983) found levels ranged from 11.3-12.2 mg/l from the surface to 50 feet deep
(Appendix 3). Tables 4-2 through 4-6 provide the 2009 thru 2013 dissolved oxygen results. As
stated in the results sections, the lower dissolved oxygen levels measured during 2009-2010 were
most likely due to faulty probes or poor calibration procedures. Sampling efforts in 2013
deployed separate multi-probe instruments at each site to achieve more reliable results. Based on
the 1981 and 2013 results, dissolved oxygen concentrations are at or near saturation throughout
the water column. All other in situ parameter sampling results were similar when comparing
1981, 2009/2010 and 2013 data.
In summary and based upon our comprehensive assessment, the water quality parameters in
Grant Lake and Grant Creek are very similar and in such low concentrations, that the proposed
seasonal changes in Grant Lake outflows as a result of the proposed Project would have very
little impact on the water chemistry of Grant Creek.
Temperature
Grant Creek exhibits the typical characteristics of a south central Alaskan, temperate forest
stream. Typically, low flows occur in winter (generally November through April) when ice and
snow cover keep overland water sources frozen. Ambient air temperatures appear to directly
affect stream temperatures throughout the year. However, the extreme upper end of Grant Creek
appears to receive some buffering from extreme late winter air temperatures due to its proximity
to outflows from an ice covered Grant Lake. During periods of ice cover, the lake temperatures
are much more stable compared to Grant Creek temperatures. Once the lake becomes ice free,
ambient air temperatures begin to influence daily mean water temperatures in the upper portions
of the water column of the lake and this in turn, directly influences creek water temperatures.
Generally in late spring (mid-May), air temperatures warm due to extended periods of daylight
and ice begins to break up on Grant Lake. Once breakup occurs, the stream temperatures are
closely correlated to lake water temperatures at a depth of 1.5 meters. Temperatures peak in
August as runoff flows recede and lake temperatures increase. This also coincides with the
majority of anadromous fish returning to the stream to spawn. Stream temperatures steadily
descend throughout the fall.
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FERC No. 13212 42 June 2014
Grant Lake vertical temperature profiles show two distinct characteristics that are typical for
lakes that experience long periods of ice cover (Bengtsson 2012). The first characteristic noted
is that winter water temperatures increase with depth. This trend was noted from January
through mid to late May. Following ice breakup temperatures begin to warm up on the surface
and remain cooler at depth. The largest temperature difference between the lake surface and at
depth occurs in mid August through mid September. By late September the water column is of
Grant Lake is nearly isothermic. The onset and duration of ice cover appears to have a
substantial effect on the timing of Grant Lake temperature changes.
Baseline temperature data for both Grant Creek and Grant Lake were collected to assist in
development of Project design and potential mitigation measures. Proposed Project designs
indicate water withdrawals from Grant Lake would occur near the GLTS site (Figure 3.1-1). A
review of 2009 and 2013 water temperature data from Grant Creek and Grant Lake indicates a
depth of 1.5 meters below the water surface in Grant Lake most closely mimics water
temperatures in Grant Creek (Figures 5.1-7 and 5.1-8).
6.2. Hydrology
The primary study objectives of extending the period of record and assessing accretion flows
within the canyon reach of Grant Creek were achieved. Discharge measurements ranging from
17 cfs to 694 cfs were completed and accurately defined the stage-discharge relationship. The
2013 discharge record was similar to the historical USGS record with a few deviations from the
general pattern in June and September 2013. The higher flows in June most likely resulted from
a sustained heat wave. These warm temperatures resulted in elevated rates of snow and glacial
melt which caused higher discharges. In September 2013, a pattern of sustained precipitation is
what caused flows to spike above the 11 year average.
A period of stable, low flow conditions in early April allowed for the accurate measurement of
discharge at the upstream and downstream sections of the Canyon Reach. The results indicate
that all of the water entering the canyon reach is conveyed downstream, with no net losses or
gains for the 0.5 mile section of Grant Creek.
7 VARIANCES FROM FERC-APPROVED STUDY PLAN AND PROPOSED
MODIFICATIONS
7.1. Water Quality and Temperature
There were no substantial variances from the FERC and agency-approved study plan.
7.2. Hydrology
There were no substantial variances from the FERC and agency-approved study plan.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
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FERC No. 13212 43 June 2014
8 REFERENCES
AEIDC (Arctic Environmental Information 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.
Bengtsson, L., R.W. Herschy and R.W Fairbridge. 2012. Encyclopedia of Lakes and
Reservoirs. Department of Water Resources Engineering, Lund University, Lund,
Sweden. 954 pgs.
Ebasco Services Incorporated. 1984. Grant Lake Hydroelectric Project Detailed Feasibility
Analysis. Volume 2. Environmental Report. Rep. prepared for Alaska Power Authority.
HDR. 2009. Grant Creek Proposed Hydroelectric Project Reconnaissance Report, Draft.
Prepared For Kenai Hydro, LLC, Homer, Alaska.
HDR. 2010. Grant Lake/Grant Creek And Falls Creek Project - Aquatic Resources Draft Study
plan. Prepared For Kenai Hydro, LLC, Homer, Alaska.
KHL (Kenai Hydro, LLC). 2009. Pre-Application Document Grant Lake/Grant Creek and Falls
Creek Project (FERC No. 13211 and 13212). August 2009.
Rantz, S.E., and others. 1982. Measurement and Computation of Streamflow, Volume 1:
Measurement of Stage and Discharge. U.S. Geological Survey Water Supply Paper 2175.
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Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 June 2014
Appendix 1: Grant Lake and Grant Creek Temperature
Records
Appendix 1a. Grant Creek Temperature Records - 2013
Appendix 1b. Grant Lake Temperature Records – 2013
Appendix 1c. Historical Grant Creek Temperature Records – 1982; 2009-2012
Appendix 1d. Historical Grant Lake Temperature Records – 2010-2012
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FERC No. 13212 June 2014
Appendix 1a. Grant Creek Temperature Records – 2013
This appendix contains the following figures and tables:
Table A.1a-1 GC 100- daily mean temperature (C), calendar year 2013.
Table A.1a-2 GC 200- daily mean temperature (C), calendar year 2013.
Table A.1a-3 GC 250- daily mean temperature (C), calendar year 2013.
Table A.1a-4 GC 300- daily mean temperature (C), calendar year 2013.
Table A.1a-5 GC 500- daily mean temperature (C), calendar year 2013.
Table A.1a-6 GC 600- daily mean temperature (C), calendar year 2013.
Table A.1a-7 GC 200oc-off channel rearing area- daily mean temperature (C), calendar year
2013.
Table A.1a-8 GC 250oc-off channel rearing area- daily mean temperature (C), calendar year
2013.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
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FERC No. 13212 Appendix 1a Page 1 June 2014
Table A.1a-1. Grant Creek – GC 100 daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 m m m m 2.2 4.2 9.7 13.9 12.6 m m m
2 m m m 1.6 2.0 4.6 10.1 14.7 12.2 m m m
3 m m m 1.1 2.2 4.7 9.9 14.7 12.1 m m m
4 m m m 0.9 2.1 5.4 9.5 13.3 11.7 m m m
5 m m m 0.7 2.5 5.3 10.0 13.4 11.6 m m m
6 m m m 1.1 2.7 6.1 10.5 13.4 11.5 m m m
7 m m m 0.8 2.8 5.7 10.5 13.6 11.4 m m m
8 m m m 0.5 2.9 5.8 10.4 12.3 11.3 m m m
9 m m m 0.5 3.0 7.0 10.5 12.6 11.2 m m m
10 m m m 0.2 3.2 8.1 11.8 12.4 11.2 m m m
11 m m m 0.1 3.3 9.2 12.6 12.3 11.2 m m m
12 m m m 0.3 3.4 8.1 12.9 12.8 10.5 m m m
13 m m m 0.4 3.4 8.4 11.1 12.6 10.7 m m m
14 m m m 0.7 3.3 9.1 11.5 12.9 10.8 m m m
15 m m m 0.7 3.4 9.8 13.1 13.1 10.9 m m m
16 m m m 0.7 3.6 11.3 13.7 13.2 10.7 m m m
17 m m m 0.7 3.7 12.4 14.6 13.8 10.6 m m m
18 m m m 0.8 3.7 11.1 14.3 13.5 10.5 m m m
19 m m m 0.9 3.9 11.6 13.7 13.0 10.4 m m m
20 m m m 1.0 4.0 9.8 14.9 12.6 9.9 m m m
21 m m m 1.2 4.1 8.4 15.7 12.1 9.6 m m m
22 m m m 1.6 4.3 10.5 14.4 12.3 9.3 m m m
23 m m m 1.4 4.6 10.9 14.2 12.8 8.9 m m m
24 m m m 1.8 4.9 11.8 14.2 13.1 8.7 m m m
25 m m m 1.6 4.9 11.9 13.4 12.9 8.8 m m m
26 m m m 1.4 4.8 11.8 13.5 12.7 8.8 m m m
27 m m m 1.6 5.0 11.3 14.5 13.2 m m m m
28 m m m 1.6 5.0 11.3 15.0 12.6 m m m m
29 m --- m 1.7 5.0 11.8 15.2 13.3 m m m m
30 m --- m 1.9 4.8 10.1 14.8 13.2 m m m m
31 m --- m --- 4.3 --- 14.7 12.7 --- m --- m
Mean m m m 1.0 3.6 8.9 12.7 13.1 10.6 m m m
Min m m m 0.1 2.0 4.2 9.5 12.1 8.7 m m m
Max m m m 1.9 5.0 12.4 15.7 14.7 12.6 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1a Page 2 June 2014
Table A.1a-2. Grant Creek – GC 200 daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 1.6 1.4 1.4 1.3 2.0 4.2 9.7 13.9 12.5 m m m
2 1.6 1.5 1.0 0.6 1.9 4.5 10.0 14.7 12.1 m m m
3 1.6 1.4 1.3 m 2.1 4.7 9.9 14.6 12.1 m m m
4 1.6 1.5 1.5 1.3 2.1 5.3 9.5 13.2 11.7 m m m
5 1.7 1.4 1.4 0.6 2.4 5.3 10.0 13.4 11.5 m m m
6 1.6 1.3 1.3 1.0 2.5 6.0 10.5 13.3 11.5 m m m
7 1.5 1.3 1.4 0.6 2.6 5.6 10.4 13.6 11.4 m m m
8 1.4 1.4 1.5 0.2 2.7 5.8 10.4 12.3 11.2 m m m
9 0.9 1.4 1.4 0.2 2.9 7.0 10.5 12.6 11.1 m m m
10 1.2 1.5 1.1 0.0 3.0 8.0 11.7 12.4 11.2 m m m
11 1.3 1.2 1.1 0.1 3.2 9.2 12.6 12.2 11.1 m m m
12 1.3 1.2 0.5 0.2 3.2 8.1 12.9 12.8 10.5 m m m
13 1.5 1.4 0.3 0.3 3.2 8.4 11.0 12.6 10.6 m m m
14 1.5 1.5 0.7 0.5 3.2 9.1 11.4 12.8 10.8 m m m
15 1.1 1.4 0.6 0.4 3.4 9.7 13.0 13.1 10.9 m m m
16 1.0 0.7 0.3 0.4 3.4 11.2 13.6 13.2 10.6 m m m
17 0.9 1.2 0.4 0.4 3.6 12.4 14.5 13.7 10.6 m m m
18 0.6 0.8 0.3 0.4 3.6 11.1 14.3 13.4 10.5 m m m
19 1.1 0.8 0.3 0.6 3.8 11.5 13.6 13.0 10.3 m m m
20 1.2 1.3 0.3 0.7 3.9 9.8 14.9 12.5 9.8 m m m
21 1.3 1.1 0.3 1.0 4.0 8.4 15.6 12.1 9.5 m m m
22 1.5 1.0 0.5 1.3 4.2 10.4 14.4 12.3 9.2 m m m
23 1.5 1.0 1.1 1.3 4.5 10.9 14.2 12.8 8.8 m m m
24 1.4 1.2 1.0 1.7 4.8 11.8 14.1 13.0 8.6 m m m
25 1.1 1.2 0.7 1.5 4.8 11.9 13.3 12.8 8.7 m m m
26 0.1 1.3 0.4 1.3 4.7 11.7 13.4 12.7 8.7 m m m
27 0.1 1.4 0.2 1.4 4.9 11.3 14.5 13.1 m m m m
28 0.1 1.5 0.9 1.4 4.9 11.2 14.9 12.6 m m m m
29 0.9 --- 1.1 1.6 4.9 11.8 15.2 13.2 m m m m
30 1.3 --- 1.3 1.8 4.7 10.1 14.7 13.2 m m m m
31 1.3 --- 1.3 --- 4.2 --- 14.6 12.7 --- m --- m
Mean 1.2 1.3 0.9 0.9 3.5 8.9 12.7 13.0 10.6 m m m
Min 0.1 0.7 0.2 0.0 1.9 4.2 9.5 12.1 8.6 m m m
Max 1.7 1.5 1.5 1.8 4.9 12.4 15.6 14.7 12.5 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1a Page 3 June 2014
Table A.1a-3. Grant Creek – GC 250 daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 m m m m 2.1 4.2 9.7 13.9 12.5 m m m
2 m m m 1.5 2.0 4.5 10.1 14.7 12.2 m m m
3 m m m 1.1 2.2 4.7 9.9 14.7 12.1 m m m
4 m m m 0.9 2.1 5.4 9.5 13.3 11.7 m m m
5 m m m 0.8 2.5 5.3 10.0 13.4 11.6 m m m
6 m m m 1.1 2.6 6.1 10.5 13.4 11.5 m m m
7 m m m 0.8 2.7 5.6 10.5 13.6 11.4 m m m
8 m m m 0.5 2.8 5.8 10.4 12.3 11.2 m m m
9 m m m 0.5 3.0 7.0 10.5 12.6 11.2 m m m
10 m m m 0.3 3.2 8.1 11.8 12.4 11.2 m m m
11 m m m 0.2 3.3 9.2 12.6 12.3 11.2 m m m
12 m m m 0.3 3.3 8.1 12.9 12.8 10.5 m m m
13 m m m 0.5 3.4 8.4 11.0 12.6 10.6 m m m
14 m m m 0.8 3.3 9.1 11.5 12.9 10.8 m m m
15 m m m 0.7 3.4 9.8 13.1 13.1 10.9 m m m
16 m m m 0.7 3.6 11.3 13.7 13.2 10.7 m m m
17 m m m 0.8 3.7 12.4 14.6 13.8 10.6 m m m
18 m m m 0.8 3.7 11.1 14.3 13.5 10.5 m m m
19 m m m 0.9 3.9 11.6 13.6 13.0 10.4 m m m
20 m m m 1.0 4.0 9.8 14.9 12.5 9.9 m m m
21 m m m 1.1 4.1 8.4 15.7 12.2 9.6 m m m
22 m m m 1.5 4.3 10.5 14.4 12.3 9.3 m m m
23 m m m 1.4 4.6 10.9 14.2 12.8 8.9 m m m
24 m m m 1.7 4.9 11.8 14.2 13.1 8.7 m m m
25 m m m 1.5 4.9 11.9 13.3 12.9 8.8 m m m
26 m m m 1.4 4.7 11.8 13.4 12.7 8.8 m m m
27 m m m 1.5 5.0 11.3 14.5 13.2 m m m m
28 m m m 1.5 5.0 11.3 15.0 12.6 m m m m
29 m --- m 1.7 5.0 11.8 15.2 13.3 m m m m
30 m --- m 1.8 4.8 10.1 14.8 13.2 m m m m
31 m --- m --- 4.2 --- 14.7 12.7 --- m --- m
Mean m m m 1.0 3.6 8.9 12.7 13.1 10.6 m m m
Min m m m 0.2 2.0 4.2 9.5 12.2 8.7 m m m
Max m m m 1.8 5.0 12.4 15.7 14.7 12.5 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1a Page 4 June 2014
Table A.1a-4. Grant Creek – GC 300 daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 m m m m 2.0 4.2 9.6 13.8 12.5 m m m
2 m m m 1.4 1.9 4.5 10.0 14.7 12.1 m m m
3 m m m 1.1 2.1 4.7 9.9 14.6 12.1 m m m
4 m m m 0.9 2.1 5.3 9.4 13.2 11.7 m m m
5 m m m 0.8 2.4 5.3 10.0 13.4 11.5 m m m
6 m m m 1.1 2.6 6.0 10.5 13.4 11.5 m m m
7 m m m 0.8 2.7 5.6 10.4 13.6 11.4 m m m
8 m m m 0.5 2.7 5.7 10.4 12.3 11.2 m m m
9 m m m 0.5 2.9 7.0 10.5 12.6 11.2 m m m
10 m m m 0.4 3.1 8.1 11.7 12.4 11.2 m m m
11 m m m 0.2 3.2 9.1 12.6 12.2 11.2 m m m
12 m m m 0.4 3.3 8.1 12.8 12.8 10.5 m m m
13 m m m 0.5 3.3 8.4 11.0 12.5 10.6 m m m
14 m m m 0.7 3.3 9.1 11.4 12.8 10.8 m m m
15 m m m 0.7 3.4 9.8 13.1 13.1 10.9 m m m
16 m m m 0.7 3.6 11.3 13.6 13.2 10.6 m m m
17 m m m 0.8 3.6 12.3 14.5 13.7 10.6 m m m
18 m m m 0.8 3.7 11.0 14.2 13.5 10.5 m m m
19 m m m 0.9 3.8 11.5 13.6 13.0 10.4 m m m
20 m m m 1.0 3.9 9.8 14.9 12.5 9.9 m m m
21 m m m 1.1 4.0 8.4 15.6 12.1 9.6 m m m
22 m m m 1.4 4.2 10.5 14.3 12.3 9.3 m m m
23 m m m 1.3 4.5 10.9 14.1 12.8 8.9 m m m
24 m m m 1.6 4.8 11.8 14.1 13.1 8.7 m m m
25 m m m 1.5 4.8 11.9 13.3 12.8 8.8 m m m
26 m m m 1.3 4.7 11.7 13.4 12.7 8.7 m m m
27 m m m 1.4 4.9 11.2 14.5 13.2 m m m m
28 m m m 1.5 4.9 11.2 14.9 12.6 m m m m
29 m --- m 1.6 4.9 11.7 15.2 13.3 m m m m
30 m --- m 1.8 4.7 10.0 14.7 13.2 m m m m
31 m --- m --- 4.2 --- 14.6 12.7 --- m --- m
Mean m m m 1.0 3.6 8.9 12.7 13.0 10.6 m m m
Min m m m 0.2 1.9 4.2 9.4 12.1 8.7 m m m
Max m m m 1.8 4.9 12.3 15.6 14.7 12.5 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1a Page 5 June 2014
Table A.1a-5. Grant Creek – GC 500 daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 m m m m 2.0 4.2 9.6 13.8 12.5 m m m
2 m m m 1.3 1.9 4.4 10.0 14.7 12.1 m m m
3 m m m 1.1 2.1 4.7 9.9 14.6 12.0 m m m
4 m m m 0.9 2.1 5.3 9.4 13.2 11.7 m m m
5 m m m 0.8 2.4 5.3 10.0 13.4 11.5 m m m
6 m m m 1.1 2.5 6.0 10.5 13.3 11.5 m m m
7 m m m 0.8 2.6 5.5 10.4 13.6 11.3 m m m
8 m m m 0.6 2.7 5.7 10.4 12.3 11.2 m m m
9 m m m 0.6 2.9 7.0 10.5 12.6 11.1 m m m
10 m m m 0.4 3.1 8.1 11.7 12.4 11.2 m m m
11 m m m 0.3 3.2 9.1 12.6 12.2 11.1 m m m
12 m m m 0.4 3.2 8.0 12.8 12.8 10.5 m m m
13 m m m 0.5 3.3 8.3 10.9 12.5 10.6 m m m
14 m m m 0.8 3.3 9.0 11.4 12.8 10.8 m m m
15 m m m 0.8 3.4 9.7 13.1 13.1 10.9 m m m
16 m m m 0.7 3.6 11.2 13.6 13.2 10.6 m m m
17 m m m 0.8 3.6 12.3 14.5 13.7 10.6 m m m
18 m m m 0.8 3.6 11.0 14.2 13.4 10.5 m m m
19 m m m 0.9 3.8 11.5 13.6 13.0 10.4 m m m
20 m m m 1.0 3.9 9.7 14.9 12.5 9.9 m m m
21 m m m 1.1 4.0 8.3 15.6 12.1 9.6 m m m
22 m m m 1.3 4.1 10.4 14.3 12.3 9.3 m m m
23 m m m 1.3 4.4 10.9 14.1 12.8 8.9 m m m
24 m m m 1.6 4.8 11.7 14.1 13.1 8.7 m m m
25 m m m 1.4 4.8 11.9 13.3 12.8 8.8 m m m
26 m m m 1.3 4.7 11.7 13.4 12.7 8.7 m m m
27 m m m 1.4 4.9 11.2 14.5 13.1 m m m m
28 m m m 1.4 4.8 11.2 14.9 12.6 m m m m
29 m --- m 1.6 4.9 11.7 15.2 13.3 m m m m
30 m --- m 1.8 4.7 10.0 14.7 13.2 m m m m
31 m --- m --- 4.1 --- 14.6 12.7 --- m --- m
Mean m m m 1.0 3.5 8.8 12.7 13.0 10.6 m m m
Min m m m 0.3 1.9 4.2 9.4 12.1 8.7 m m m
Max m m m 1.8 4.9 12.3 15.6 14.7 12.5 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1a Page 6 June 2014
Table A.1a-6. Grant Creek – GC 600 daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 m m m m 1.8 4.1 9.6 13.8 12.4 m m m
2 m m m m 1.8 4.4 10.0 14.8 12.0 m m m
3 m m m m 1.9 4.6 9.9 14.6 11.9 m m m
4 m m m m 2.0 5.2 9.4 13.2 11.5 m m m
5 m m m 1.3 2.3 5.3 9.9 13.3 11.4 m m m
6 m m m 1.1 2.4 5.9 10.4 13.4 11.3 m m m
7 m m m 1.1 2.5 5.5 10.4 13.6 11.2 m m m
8 m m m 1.0 2.6 5.6 10.3 12.3 11.0 m m m
9 m m m 1.1 2.8 6.9 10.5 12.6 11.0 m m m
10 m m m 1.0 2.9 8.0 11.7 12.3 11.0 m m m
11 m m m 1.0 3.0 9.1 12.7 12.2 11.0 m m m
12 m m m 1.0 3.1 8.0 12.8 12.7 10.3 m m m
13 m m m 1.0 3.2 8.3 10.8 12.5 10.4 m m m
14 m m m 1.1 3.3 9.0 11.4 12.8 10.6 m m m
15 m m m 1.1 3.4 9.7 13.1 13.1 10.8 m m m
16 m m m 1.1 3.5 11.2 13.7 13.2 10.6 m m m
17 m m m 1.1 3.6 12.5 14.6 13.7 10.5 m m m
18 m m m 1.1 3.6 11.0 14.2 13.4 10.4 m m m
19 m m m 1.1 3.8 11.6 13.7 12.9 10.3 m m m
20 m m m 1.2 3.9 9.7 14.9 12.5 9.9 m m m
21 m m m 1.1 4.0 8.3 15.7 12.1 9.5 m m m
22 m m m 1.2 4.1 10.5 14.3 12.2 9.2 m m m
23 m m m 1.2 4.4 10.9 14.1 12.6 8.9 m m m
24 m m m 1.3 4.8 11.7 14.1 13.0 8.7 m m m
25 m m m 1.4 4.8 11.8 13.3 12.7 8.6 m m m
26 m m m 1.4 4.7 11.7 13.3 12.7 8.6 m m m
27 m m m 1.5 4.8 11.1 14.4 13.0 m m m m
28 m m m 1.6 4.8 11.2 14.9 12.4 m m m m
29 m --- m 1.6 4.8 11.7 15.1 13.1 m m m m
30 m --- m 1.7 4.5 10.0 14.7 13.0 m m m m
31 m --- m --- 4.0 --- 14.6 12.5 --- m --- m
Mean m m m 1.2 3.5 8.8 12.7 13.0 10.5 m m m
Min m m m 1.0 1.8 4.1 9.4 12.1 8.6 m m m
Max m m m 1.7 4.8 12.5 15.7 14.8 12.4 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1a Page 7 June 2014
Table A.1a-7. Grant Creek off-channel rearing area – GC 200oc daily mean temperature (C), calendar
year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 m m m m m m 9.5 13.4 10.0 m m m
2 m m m m m m 9.5 13.0 9.9 m m m
3 m m m m m m 9.3 13.0 9.8 m m m
4 m m m m m m 9.2 12.8 9.7 m m m
5 m m m m m m 9.0 12.5 9.4 m m m
6 m m m m m m 9.1 12.3 9.3 m m m
7 m m m m m m 9.3 12.1 9.2 m m m
8 m m m m m m 9.5 12.2 9.2 m m m
9 m m m m m m 9.6 11.7 9.2 m m m
10 m m m m m m 9.7 11.8 9.2 m m m
11 m m m m m m 10.2 11.7 9.2 m m m
12 m m m m m m 10.6 11.8 9.1 m m m
13 m m m m m m 10.9 11.9 8.9 m m m
14 m m m m m 8.6 10.6 11.9 9.0 m m m
15 m m m m m 7.9 10.7 11.7 8.8 m m m
16 m m m m m 8.7 11.1 11.6 8.5 m m m
17 m m m m m 10.5 11.3 11.6 8.5 m m m
18 m m m m m 10.8 11.8 11.6 8.5 m m m
19 m m m m m 9.7 12.3 11.7 8.4 m m m
20 m m m m m 9.8 12.4 11.5 7.9 m m m
21 m m m m m 8.9 12.7 11.1 7.6 m m m
22 m m m m m 8.6 13.0 10.1 7.7 m m m
23 m m m m m 9.5 12.8 9.8 7.4 m m m
24 m m m m m 10.3 12.8 9.8 6.9 m m m
25 m m m m m 10.5 12.9 9.7 7.0 m m m
26 m m m m m 10.7 12.7 9.8 7.1 m m m
27 m m m m m 10.9 12.8 9.9 m m m m
28 m m m m m 10.3 13.2 10.1 m m m m
29 m --- m m m 10.5 13.4 10.3 m m m m
30 m --- m m m 10.5 13.6 10.0 m m m m
31 m --- m --- m --- 13.6 10.1 --- m --- m
Mean m m m m m 9.8 11.3 11.4 8.7 m m m
Min m m m m m 7.9 9.0 9.7 6.9 m m m
Max m m m m m 10.9 13.6 13.4 10.0 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1a Page 8 June 2014
Table A.1a-8. Grant Creek off channel rearing area – GC250oc daily mean temperature (C), calendar
year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 m m m m m m m 13.7 12.3 m m m
2 m m m m m m m 14.2 11.7 m m m
3 m m m m m m m 14.4 11.8 m m m
4 m m m m m m m 13.1 11.4 m m m
5 m m m m m m m 13.2 11.2 m m m
6 m m m m m m m 13.0 11.0 m m m
7 m m m m m m m 13.3 11.1 m m m
8 m m m m m m m 12.2 10.9 m m m
9 m m m m m m m 12.3 10.6 m m m
10 m m m m m m m 12.4 10.7 m m m
11 m m m m m m m 12.2 10.2 m m m
12 m m m m m m m 12.7 9.8 m m m
13 m m m m m m m 12.6 9.8 m m m
14 m m m m m m m 12.8 9.7 m m m
15 m m m m m m m 13.0 10.3 m m m
16 m m m m m m m 12.8 9.6 m m m
17 m m m m m m m 13.4 9.5 m m m
18 m m m m m m 13.4 13.1 9.6 m m m
19 m m m m m m 13.5 12.7 9.8 m m m
20 m m m m m m 14.6 12.3 9.4 m m m
21 m m m m m m 15.3 12.0 8.9 m m m
22 m m m m m m 14.3 12.0 8.6 m m m
23 m m m m m m 13.9 12.6 8.3 m m m
24 m m m m m m 13.9 12.8 7.8 m m m
25 m m m m m m 13.1 12.5 8.2 m m m
26 m m m m m m 13.3 12.3 8.3 m m m
27 m m m m m m 14.2 12.9 m m m m
28 m m m m m m 14.6 12.4 m m m m
29 m --- m m m m 14.8 12.7 m m m m
30 m --- m m m m 14.5 12.9 m m m m
31 m --- m --- m --- 14.3 12.4 --- m --- m
Mean m m m m m m 14.1 12.8 10.0 m m m
Min m m m m m m 13.1 12.0 7.8 m m m
Max m m m m m m 15.3 14.4 12.3 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 June 2014
Appendix 1b. Grant Lake Temperature Records – 2013
This appendix contains the following figures and tables:
Table A.1b-1 GL 0.2m - daily mean temperature (C), calendar year 2013.
Table A.1b-2 GL 0.5m - daily mean temperature (C), calendar year 2013.
Table A.1b-3 GL 1.5m - daily mean temperature (C), calendar year 2013.
Table A.1b-4 GL 3.0m - daily mean temperature (C), calendar year 2013.
Table A.1b-5 GL 6.0m - daily mean temperature (C), calendar year 2013.
Table A.1b-6 GL 9.0m - daily mean temperature (C), calendar year 2013.
Table A.1b-7 GL 12.0m - daily mean temperature (C), calendar year 2013.
Table A.1b-8 GL 15.0m - daily mean temperature (C), calendar year 2013.
Table A.1b-9 GL 18.0m - daily mean temperature (C), calendar year 2013.
Table A.1b-10 GL 19.5m - daily mean temperature (C), calendar year 2013.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1b Page 1 June 2014
Table A.1b-1. Grant Lake – GL 0.2m daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 0.0 0.0 0.0 0.0 0.0 4.5 10.0 14.5 12.8 m m m
2 0.0 0.0 0.0 0.0 0.0 4.9 10.6 15.3 12.4 m m m
3 0.0 0.0 0.0 0.0 0.0 4.7 10.4 14.8 12.2 m m m
4 0.0 0.0 0.0 0.0 0.0 5.3 9.8 13.6 11.7 m m m
5 0.0 0.0 0.0 0.0 0.1 5.6 10.3 13.6 11.6 m m m
6 0.1 0.0 0.0 0.0 0.1 5.7 10.9 13.4 11.5 m m m
7 0.0 0.0 0.0 0.0 0.1 6.1 10.7 13.7 11.5 m m m
8 0.0 0.0 0.0 0.0 0.1 5.9 10.7 12.4 11.4 m m m
9 0.0 0.0 0.0 0.0 0.2 7.3 10.9 12.6 11.2 m m m
10 0.0 0.0 0.0 0.0 0.2 8.2 11.9 12.7 11.2 m m m
11 0.1 0.0 0.0 0.0 0.1 9.8 13.5 12.4 11.3 m m m
12 0.1 0.0 0.0 0.0 0.1 9.5 13.7 13.0 10.8 m m m
13 0.1 0.0 0.0 0.0 0.2 9.8 11.8 13.1 10.5 m m m
14 0.1 0.0 0.0 0.0 0.1 10.4 12.2 13.2 10.8 m m m
15 0.1 0.0 0.0 0.0 0.2 10.2 13.8 13.4 10.9 m m m
16 0.1 0.0 0.0 0.0 0.2 12.5 14.3 13.5 10.7 m m m
17 0.1 0.0 0.0 0.0 0.3 15.3 15.2 13.8 10.7 m m m
18 0.1 0.0 0.0 0.0 0.4 13.0 15.1 13.8 10.6 m m m
19 0.1 0.0 0.0 0.0 0.5 12.0 14.4 13.3 10.5 m m m
20 0.1 0.0 0.0 0.0 0.5 10.9 15.4 12.7 10.1 m m m
21 0.1 0.0 0.0 0.0 0.6 9.1 16.0 12.3 9.7 m m m
22 0.1 0.0 0.0 0.0 0.6 11.3 15.0 12.5 9.4 m m m
23 0.1 0.0 0.0 0.0 0.7 11.1 14.9 13.0 9.1 m m m
24 0.1 0.0 0.0 0.0 2.2 12.4 15.0 13.3 9.0 m m m
25 0.1 0.0 0.0 0.0 4.1 12.6 14.0 13.2 8.8 m m m
26 0.1 0.0 0.0 0.0 3.9 13.0 13.9 13.0 8.7 m m m
27 0.1 0.0 0.0 0.0 4.0 12.3 15.2 13.4 m m m m
28 0.1 0.0 0.0 0.0 4.6 12.1 16.0 12.9 m m m m
29 0.0 0.0 0.0 0.0 5.5 12.6 16.2 13.3 m m m m
30 0.0 0.0 0.0 0.0 5.0 10.8 15.6 13.5 m m m m
31 0.0 0.0 0.0 0.0 4.5 10.0 15.6 13.0 m m m m
Mean 0.1 0.0 0.0 0.0 1.3 9.6 13.3 13.3 10.7 m m m
Min 0.0 0.0 0.0 0.0 0.0 4.5 9.8 12.3 8.7 m m m
Max 0.1 0.0 0.0 0.0 5.5 15.3 16.2 15.3 12.8 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1b Page 2 June 2014
Table A.1b-2. Grant Lake – GL 0.5m daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 0.5 0.7 0.7 0.5 0.9 4.4 9.8 14.3 12.7 m m m
2 0.5 0.8 0.7 0.5 0.9 4.8 10.4 15.2 12.3 m m m
3 0.5 0.7 0.7 0.5 0.9 4.6 10.3 14.7 12.1 m m m
4 0.5 0.7 0.6 0.5 0.9 5.2 9.7 13.5 11.7 m m m
5 0.5 0.7 0.6 0.5 0.8 5.4 10.3 13.5 11.6 m m m
6 0.5 0.8 0.6 0.5 0.8 5.6 10.8 13.4 11.5 m m m
7 0.5 0.8 0.7 0.5 0.8 6.0 10.6 13.6 11.5 m m m
8 0.5 0.7 0.7 0.5 0.8 5.8 10.6 12.3 11.3 m m m
9 0.5 0.7 0.7 0.5 0.9 7.1 10.8 12.6 11.2 m m m
10 0.5 0.7 0.7 0.5 1.1 7.8 11.8 12.5 11.2 m m m
11 0.5 0.7 0.6 0.5 1.1 9.4 13.0 12.3 11.2 m m m
12 0.6 0.7 0.6 0.5 1.2 9.1 13.2 12.9 10.7 m m m
13 0.6 0.7 0.7 0.5 1.3 9.2 11.5 12.9 10.5 m m m
14 0.6 0.7 0.7 0.5 1.6 10.0 11.9 13.0 10.8 m m m
15 0.6 0.7 0.6 0.5 1.7 9.8 13.5 13.3 10.9 m m m
16 0.6 0.7 0.6 0.5 1.8 12.1 13.9 13.4 10.7 m m m
17 0.7 0.7 0.6 0.5 1.9 14.5 14.9 13.8 10.6 m m m
18 0.7 0.7 0.6 0.5 2.0 12.4 14.7 13.7 10.6 m m m
19 0.7 0.7 0.6 0.5 2.2 11.9 14.0 13.2 10.5 m m m
20 0.7 0.7 0.6 0.5 2.8 10.6 15.2 12.6 10.1 m m m
21 0.6 0.7 0.7 0.5 3.4 8.9 15.9 12.2 9.7 m m m
22 0.7 0.7 0.6 0.5 3.8 11.1 14.7 12.5 9.4 m m m
23 0.8 0.7 0.6 0.5 3.7 11.0 14.5 12.9 9.1 m m m
24 0.7 0.7 0.6 0.5 4.6 12.2 14.7 13.2 9.0 m m m
25 0.7 0.7 0.6 0.6 5.4 12.3 13.6 13.0 8.8 m m m
26 0.7 0.7 0.6 0.7 4.5 12.5 13.7 13.0 8.8 m m m
27 0.7 0.7 0.6 0.7 4.9 11.9 14.9 13.3 m m m m
28 0.8 0.7 0.5 0.8 4.9 11.9 15.5 12.8 m m m m
29 0.8 --- 0.5 0.8 5.6 12.1 15.7 13.3 m m m m
30 0.8 --- 0.5 0.9 4.9 10.5 15.1 13.3 m m m m
31 0.7 --- 0.5 --- 4.4 --- 15.1 12.9 --- m --- m
Mean 0.6 0.7 0.6 0.5 2.5 9.3 13.1 13.2 10.7 m m m
Min 0.5 0.7 0.5 0.5 0.8 4.4 9.7 12.2 8.8 m m m
Max 0.8 0.8 0.7 0.9 5.6 14.5 15.9 15.2 12.7 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1b Page 3 June 2014
Table A.1b-3. Grant Lake – GL 1.5m daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 2.2 2.3 2.4 2.3 2.7 4.5 9.3 13.4 12.3 m m m
2 2.2 2.3 2.4 2.3 2.8 4.9 9.9 14.4 12.1 m m m
3 2.2 2.3 2.4 2.3 2.8 4.7 9.8 14.4 11.9 m m m
4 2.2 2.3 2.4 2.3 2.9 5.3 9.3 13.2 11.6 m m m
5 2.2 2.3 2.4 2.3 3.0 5.4 9.8 13.2 11.5 m m m
6 2.2 2.3 2.4 2.3 3.0 5.7 10.2 13.2 11.4 m m m
7 2.2 2.3 2.4 2.3 3.1 6.0 10.2 13.5 11.3 m m m
8 2.2 2.4 2.4 2.3 3.2 5.7 10.3 12.0 11.0 m m m
9 2.2 2.4 2.4 2.3 3.3 6.7 10.4 12.5 11.1 m m m
10 2.2 2.4 2.4 2.3 3.4 7.4 11.5 12.2 11.1 m m m
11 2.1 2.4 2.4 2.3 3.4 8.8 11.8 12.1 11.0 m m m
12 2.1 2.4 2.4 2.3 3.2 8.0 11.9 12.6 10.4 m m m
13 2.2 2.4 2.4 2.3 2.9 8.2 10.7 12.3 10.5 m m m
14 2.2 2.4 2.4 2.3 3.0 9.5 11.1 12.6 10.6 m m m
15 2.2 2.4 2.4 2.3 3.2 8.5 12.7 12.9 10.8 m m m
16 2.1 2.4 2.4 2.3 3.4 11.0 13.3 13.1 10.6 m m m
17 2.2 2.4 2.4 2.3 3.6 10.9 14.0 13.7 10.6 m m m
18 2.2 2.4 2.3 2.3 3.7 10.3 12.8 13.2 10.4 m m m
19 2.2 2.4 2.3 2.3 4.0 11.6 12.9 12.8 10.4 m m m
20 2.2 2.4 2.4 2.3 4.1 9.8 14.5 12.4 10.0 m m m
21 2.3 2.4 2.3 2.3 4.4 8.3 14.9 12.0 9.6 m m m
22 2.3 2.5 2.3 2.3 4.3 10.5 13.1 12.2 9.4 m m m
23 2.0 2.5 2.3 2.2 4.3 10.8 13.5 12.5 9.0 m m m
24 2.2 2.5 2.3 2.3 4.6 11.6 13.6 12.9 8.9 m m m
25 2.2 2.5 2.3 2.3 4.9 11.6 12.7 12.6 8.7 m m m
26 2.2 2.4 2.4 2.3 4.7 11.3 12.9 12.6 8.7 m m m
27 2.2 2.4 2.3 2.4 5.0 10.7 14.0 12.8 m m m m
28 2.2 2.4 2.4 2.5 5.2 11.0 14.3 12.4 m m m m
29 2.2 --- 2.3 2.6 5.6 11.4 14.5 13.2 m m m m
30 2.2 --- 2.4 2.6 5.1 9.6 14.1 13.0 m m m m
31 2.3 --- 2.3 --- 4.4 --- 14.1 12.5 --- m --- m
Mean 2.2 2.4 2.4 2.3 3.8 8.7 12.2 12.8 10.6 m m m
Min 2.0 2.3 2.3 2.2 2.7 4.5 9.3 12.0 8.7 m m m
Max 2.3 2.5 2.4 2.6 5.6 11.6 14.9 14.4 12.3 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1b Page 4 June 2014
Table A.1b-4. Grant Lake – GL 3.0m daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 2.3 2.4 2.5 2.5 2.9 4.3 9.1 12.8 12.2 m m m
2 2.3 2.4 2.5 2.6 2.9 4.8 9.5 14.1 11.9 m m m
3 2.3 2.4 2.5 2.6 2.9 4.5 9.5 14.1 11.7 m m m
4 2.3 2.4 2.5 2.6 2.9 5.2 9.1 13.0 11.5 m m m
5 2.3 2.4 2.5 2.6 3.0 5.2 9.6 13.0 11.5 m m m
6 2.3 2.4 2.5 2.6 3.0 5.5 9.9 13.2 11.4 m m m
7 2.3 2.4 2.5 2.6 3.1 5.8 10.1 13.4 11.2 m m m
8 2.3 2.4 2.5 2.6 3.2 5.5 10.0 11.8 11.0 m m m
9 2.3 2.4 2.5 2.6 3.2 6.2 10.1 12.6 11.1 m m m
10 2.3 2.5 2.5 2.6 3.3 6.9 11.1 12.1 11.0 m m m
11 2.3 2.5 2.5 2.6 3.4 7.0 10.8 12.0 11.0 m m m
12 2.3 2.5 2.5 2.6 3.4 6.8 10.7 12.4 10.3 m m m
13 2.3 2.5 2.5 2.6 3.5 7.1 10.2 12.1 10.5 m m m
14 2.3 2.5 2.5 2.6 3.4 8.3 10.8 12.5 10.6 m m m
15 2.3 2.5 2.5 2.6 3.5 7.9 12.1 12.6 10.8 m m m
16 2.3 2.5 2.5 2.6 3.6 9.9 12.4 13.0 10.6 m m m
17 2.3 2.5 2.6 2.6 3.6 9.0 12.8 13.6 10.5 m m m
18 2.3 2.5 2.5 2.6 3.7 9.0 11.4 12.8 10.3 m m m
19 2.3 2.5 2.5 2.6 3.9 11.5 11.6 12.7 10.4 m m m
20 2.3 2.5 2.5 2.6 4.0 9.4 13.9 12.2 10.1 m m m
21 2.3 2.5 2.5 2.6 4.2 8.0 12.9 11.9 9.7 m m m
22 2.4 2.5 2.5 2.6 4.2 10.0 12.1 12.1 9.4 m m m
23 2.3 2.5 2.5 2.6 4.1 10.7 12.5 12.3 9.1 m m m
24 2.3 2.5 2.5 2.6 4.3 11.1 12.6 12.7 8.9 m m m
25 2.4 2.5 2.6 2.6 4.6 11.1 12.1 12.3 8.7 m m m
26 2.3 2.5 2.6 2.6 4.4 10.5 12.6 12.4 8.7 m m m
27 2.3 2.5 2.5 2.7 4.5 9.9 13.4 12.4 m m m m
28 2.3 2.5 2.5 2.7 4.8 10.5 13.0 12.2 m m m m
29 2.4 --- 2.5 2.8 5.3 10.8 13.4 13.1 m m m m
30 2.4 --- 2.6 2.8 4.9 9.3 13.5 12.8 m m m m
31 2.4 --- 2.6 --- 4.3 --- 13.4 12.3 --- m --- m
Mean 2.3 2.5 2.5 2.6 3.7 8.1 11.5 12.7 10.5 m m m
Min 2.3 2.4 2.5 2.5 2.9 4.3 9.1 11.8 8.7 m m m
Max 2.4 2.5 2.6 2.8 5.3 11.5 13.9 14.1 12.2 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1b Page 5 June 2014
Table A.1b-5. Grant Lake – GL 6.0m daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 2.6 2.7 2.9 2.9 3.1 4.3 8.3 10.7 11.6 m m m
2 2.6 2.7 2.9 2.9 3.1 4.6 8.6 12.4 11.4 m m m
3 2.6 2.7 2.9 2.9 3.1 4.3 8.9 12.0 10.9 m m m
4 2.6 2.8 2.9 2.9 3.2 5.1 8.6 12.2 11.1 m m m
5 2.6 2.8 2.9 2.9 3.2 5.1 9.2 11.8 11.3 m m m
6 2.6 2.7 2.9 2.9 3.2 5.4 9.1 12.9 11.3 m m m
7 2.6 2.7 2.9 2.9 3.2 5.7 9.3 12.1 10.8 m m m
8 2.6 2.8 2.9 2.9 3.3 5.2 9.1 10.7 10.6 m m m
9 2.6 2.8 2.9 2.9 3.3 5.7 9.3 12.5 11.0 m m m
10 2.6 2.8 2.9 2.9 3.4 6.2 9.4 11.5 10.7 m m m
11 2.6 2.8 2.9 2.9 3.4 5.9 9.2 11.6 10.8 m m m
12 2.6 2.8 2.9 2.9 3.4 6.1 8.8 11.9 10.1 m m m
13 2.7 2.8 2.9 2.9 3.5 6.2 8.9 11.6 10.5 m m m
14 2.7 2.8 2.9 2.9 3.5 6.3 9.6 12.0 10.6 m m m
15 2.7 2.8 2.9 2.9 3.5 6.8 9.8 11.5 10.6 m m m
16 2.7 2.8 2.9 2.9 3.6 8.0 10.2 12.5 10.4 m m m
17 2.7 2.8 2.9 2.9 3.6 7.6 9.6 13.1 10.3 m m m
18 2.7 2.8 2.9 2.9 3.7 7.5 9.6 11.8 10.1 m m m
19 2.7 2.8 2.9 2.9 3.9 10.4 9.9 11.9 10.3 m m m
20 2.7 2.8 2.9 3.0 3.9 8.6 10.1 11.7 10.0 m m m
21 2.6 2.8 2.9 3.0 4.0 7.4 9.8 11.6 9.7 m m m
22 2.7 2.8 2.9 3.0 4.0 8.8 9.7 11.6 9.4 m m m
23 2.7 2.8 2.9 3.0 4.1 10.3 10.1 11.9 9.1 m m m
24 2.7 2.8 2.9 3.0 4.1 9.8 10.0 12.0 8.8 m m m
25 2.7 2.8 2.9 3.0 4.2 9.7 10.2 11.6 8.7 m m m
26 2.7 2.8 2.9 2.9 4.3 9.2 10.8 11.9 8.7 m m m
27 2.7 2.8 2.9 3.0 4.4 8.7 11.1 11.4 m m m m
28 2.7 2.9 2.9 3.0 4.4 9.4 10.8 11.8 m m m m
29 2.7 --- 2.9 3.0 4.6 8.9 11.0 12.3 m m m m
30 2.7 --- 2.9 3.0 4.6 8.5 10.9 11.8 m m m m
31 2.7 --- 2.9 --- 4.2 --- 11.1 11.9 --- m --- m
Mean 2.7 2.8 2.9 2.9 3.7 7.2 9.7 11.9 10.3 m m m
Min 2.6 2.7 2.9 2.9 3.1 4.3 8.3 10.7 8.7 m m m
Max 2.7 2.9 2.9 3.0 4.6 10.4 11.1 13.1 11.6 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1b Page 6 June 2014
Table A.1b-6. Grant Lake – GL 9.0m daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 3.0 3.1 3.1 3.1 3.3 4.2 7.6 8.7 10.5 m m m
2 3.0 3.1 3.1 3.2 3.3 4.5 7.7 9.8 10.8 m m m
3 3.0 3.1 3.2 3.2 3.3 4.3 8.2 9.1 10.0 m m m
4 3.0 3.1 3.2 3.2 3.3 5.1 8.0 9.6 10.2 m m m
5 3.0 3.0 3.2 3.2 3.3 5.0 8.5 9.2 10.5 m m m
6 3.0 3.1 3.2 3.2 3.4 5.5 8.2 12.0 10.6 m m m
7 3.0 3.1 3.2 3.2 3.4 5.6 8.3 9.8 10.1 m m m
8 3.0 3.1 3.2 3.2 3.4 5.1 8.2 9.7 10.1 m m m
9 3.1 3.1 3.2 3.2 3.5 5.5 8.4 11.4 10.6 m m m
10 3.1 3.1 3.2 3.2 3.5 5.8 8.2 10.0 10.2 m m m
11 3.1 3.0 3.2 3.2 3.5 5.6 8.2 10.8 10.3 m m m
12 3.1 3.1 3.2 3.2 3.6 5.8 8.1 10.8 9.9 m m m
13 3.1 3.1 3.2 3.2 3.6 5.7 7.8 10.3 10.5 m m m
14 3.0 3.1 3.2 3.2 3.7 5.8 8.4 10.9 10.2 m m m
15 3.0 3.1 3.2 3.2 3.7 6.0 8.5 10.1 10.1 m m m
16 3.1 3.1 3.2 3.2 3.7 6.8 8.6 11.2 10.1 m m m
17 3.1 3.1 3.2 3.2 3.7 6.8 8.4 11.2 9.9 m m m
18 3.1 3.1 3.2 3.2 3.9 6.7 8.3 10.8 9.9 m m m
19 3.1 3.1 3.2 3.2 3.9 8.3 8.3 10.7 10.1 m m m
20 3.0 3.1 3.1 3.2 3.9 7.6 8.3 10.7 9.9 m m m
21 3.0 3.1 3.1 3.2 4.0 6.8 8.2 11.0 9.6 m m m
22 3.0 3.1 3.1 3.2 4.0 7.7 8.3 11.0 9.4 m m m
23 3.1 3.1 3.2 3.2 4.0 9.7 8.6 10.9 9.0 m m m
24 3.1 3.1 3.2 3.2 4.0 7.9 8.3 11.0 8.8 m m m
25 3.1 3.1 3.2 3.2 4.0 8.2 8.5 10.6 8.4 m m m
26 3.1 3.1 3.1 3.2 4.1 8.2 8.6 11.1 8.5 m m m
27 3.1 3.1 3.2 3.2 4.1 7.7 8.7 10.4 m m m m
28 3.1 3.1 3.2 3.2 4.1 8.2 8.9 11.1 m m m m
29 3.1 --- 3.2 3.3 4.2 8.0 8.9 10.9 m m m m
30 3.1 --- 3.2 3.3 4.3 7.8 8.7 10.7 m m m m
31 3.0 --- 3.2 --- 4.2 --- 8.8 11.2 --- m --- m
Mean 3.1 3.1 3.2 3.2 3.7 6.5 8.3 10.5 9.9 m m m
Min 3.0 3.0 3.1 3.1 3.3 4.2 7.6 8.7 8.4 m m m
Max 3.1 3.1 3.2 3.3 4.3 9.7 8.9 12.0 10.8 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1b Page 7 June 2014
Table A.1b-7. Grant Lake – GL 12.0m daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 3.2 3.2 3.3 3.3 3.4 4.1 7.1 7.5 8.9 m m m
2 3.2 3.3 3.3 3.3 3.4 4.4 7.1 8.1 9.2 m m m
3 3.3 3.3 3.3 3.3 3.4 4.2 7.1 7.8 8.7 m m m
4 3.3 3.3 3.3 3.3 3.5 5.0 7.0 7.4 8.9 m m m
5 3.2 3.3 3.3 3.3 3.5 4.9 7.4 7.6 8.8 m m m
6 3.2 3.2 3.3 3.3 3.5 5.4 7.5 8.1 9.7 m m m
7 3.2 3.3 3.3 3.3 3.5 5.3 7.0 8.1 9.3 m m m
8 3.3 3.3 3.3 3.3 3.5 4.9 7.3 8.0 9.0 m m m
9 3.3 3.3 3.3 3.3 3.5 5.3 7.5 9.3 10.2 m m m
10 3.2 3.2 3.3 3.3 3.6 5.5 7.0 8.6 9.3 m m m
11 3.3 3.2 3.3 3.3 3.6 5.3 7.5 8.7 9.6 m m m
12 3.3 3.3 3.3 3.3 3.7 5.4 7.2 8.4 9.6 m m m
13 3.2 3.3 3.3 3.3 3.8 5.2 6.9 8.3 10.4 m m m
14 3.2 3.3 3.3 3.3 3.8 5.4 7.3 8.4 9.7 m m m
15 3.2 3.3 3.3 3.3 3.8 5.5 7.4 8.4 9.6 m m m
16 3.2 3.3 3.3 3.3 3.8 6.1 7.4 8.8 9.6 m m m
17 3.3 3.3 3.3 3.3 3.8 6.2 7.5 8.8 9.4 m m m
18 3.2 3.3 3.3 3.3 3.8 6.0 7.3 9.3 9.5 m m m
19 3.2 3.3 3.3 3.3 3.8 7.2 7.3 8.6 9.7 m m m
20 3.2 3.3 3.3 3.3 3.9 6.5 7.2 8.4 9.4 m m m
21 3.2 3.2 3.3 3.3 3.9 6.2 7.2 9.1 9.2 m m m
22 3.3 3.3 3.3 3.3 3.9 6.7 7.3 8.5 9.4 m m m
23 3.3 3.3 3.3 3.3 3.9 8.4 7.2 9.0 9.1 m m m
24 3.2 3.3 3.3 3.3 3.9 6.8 7.2 8.9 8.8 m m m
25 3.2 3.3 3.3 3.3 3.9 6.7 7.4 8.6 8.1 m m m
26 3.2 3.2 3.3 3.3 3.9 7.1 7.3 8.9 8.2 m m m
27 3.3 3.3 3.3 3.4 3.9 6.9 7.4 8.6 m m m m
28 3.3 3.3 3.3 3.4 3.9 7.1 7.5 9.0 m m m m
29 3.3 --- 3.3 3.4 4.0 7.1 7.6 8.9 m m m m
30 3.3 --- 3.3 3.4 4.2 7.0 7.3 8.8 m m m m
31 3.3 --- 3.3 --- 4.1 --- 7.3 8.8 --- m --- m
Mean 3.3 3.3 3.3 3.3 3.7 5.9 7.3 8.5 9.3 m m m
Min 3.2 3.2 3.3 3.3 3.4 4.1 6.9 7.4 8.1 m m m
Max 3.3 3.3 3.3 3.4 4.2 8.4 7.6 9.3 10.4 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1b Page 8 June 2014
Table A.1b-8. Grant Lake – GL 15.0m daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 3.2 3.3 3.4 3.4 3.4 4.1 6.5 6.4 7.1 m m m
2 3.4 3.3 3.4 3.4 3.5 4.3 6.6 6.8 6.9 m m m
3 3.3 3.3 3.3 3.4 3.4 4.1 6.1 6.7 7.5 m m m
4 3.4 3.4 3.3 3.4 3.5 5.0 6.2 6.4 7.5 m m m
5 3.3 3.3 3.3 3.4 3.4 4.8 6.5 6.6 7.4 m m m
6 3.3 3.4 3.3 3.4 3.5 5.3 6.6 6.3 8.2 m m m
7 3.3 3.3 3.3 3.4 3.5 5.0 6.0 6.9 7.8 m m m
8 3.3 3.4 3.4 3.4 3.6 4.7 6.5 6.9 6.8 m m m
9 3.4 3.4 3.4 3.3 3.7 5.2 6.5 7.1 9.0 m m m
10 3.3 3.3 3.4 3.4 3.7 5.3 6.3 7.2 7.9 m m m
11 3.3 3.3 3.4 3.3 3.7 5.2 6.5 6.5 8.6 m m m
12 3.3 3.3 3.4 3.4 3.8 5.2 6.2 6.9 8.4 m m m
13 3.3 3.3 3.4 3.4 3.8 5.0 6.4 6.6 9.6 m m m
14 3.2 3.4 3.4 3.4 3.8 5.3 6.4 6.6 8.3 m m m
15 3.2 3.3 3.4 3.4 3.8 5.2 6.4 6.9 8.7 m m m
16 3.2 3.3 3.4 3.4 3.8 5.8 6.4 7.2 8.4 m m m
17 3.3 3.4 3.4 3.4 3.8 5.6 6.7 7.3 8.6 m m m
18 3.3 3.4 3.4 3.4 3.8 5.6 6.5 7.5 8.5 m m m
19 3.4 3.4 3.4 3.5 3.8 6.4 6.5 6.9 8.1 m m m
20 3.3 3.4 3.4 3.4 3.8 6.0 6.5 6.6 8.3 m m m
21 3.3 3.3 3.4 3.4 3.9 5.9 6.5 7.0 8.4 m m m
22 3.3 3.4 3.4 3.4 3.9 6.2 6.6 7.2 8.8 m m m
23 3.3 3.4 3.4 3.4 3.9 7.2 6.3 6.9 8.7 m m m
24 3.3 3.4 3.4 3.4 3.9 6.3 6.3 6.7 8.5 m m m
25 3.3 3.4 3.4 3.4 3.9 5.9 6.5 6.7 7.3 m m m
26 3.3 3.3 3.4 3.4 3.9 6.0 6.4 7.0 7.4 m m m
27 3.3 3.4 3.4 3.4 3.9 6.2 6.5 7.0 m m m m
28 3.3 3.4 3.4 3.4 3.9 6.4 6.5 7.3 m m m m
29 3.3 --- 3.4 3.4 4.0 6.3 6.6 7.5 m m m m
30 3.3 --- 3.4 3.4 4.0 6.4 6.4 6.9 m m m m
31 3.4 --- 3.4 --- 4.1 --- 6.4 6.9 --- m --- m
Mean 3.3 3.3 3.4 3.4 3.8 5.5 6.4 6.9 8.1 m m m
Min 3.2 3.3 3.3 3.3 3.4 4.1 6.0 6.3 6.8 m m m
Max 3.4 3.4 3.4 3.5 4.1 7.2 6.7 7.5 9.6 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1b Page 9 June 2014
Table A.1b-9. Grant Lake – GL 18.0m daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 3.2 3.3 3.4 3.4 3.4 4.1 5.8 5.7 5.8 m m m
2 3.3 3.3 3.4 3.4 3.4 4.3 5.9 6.0 5.6 m m m
3 3.3 3.3 3.4 3.4 3.4 4.1 5.6 5.8 6.6 m m m
4 3.3 3.3 3.4 3.4 3.5 5.0 5.6 5.7 6.1 m m m
5 3.3 3.3 3.3 3.4 3.5 4.7 5.7 5.9 6.4 m m m
6 3.3 3.4 3.3 3.4 3.5 5.3 5.7 5.5 6.5 m m m
7 3.3 3.4 3.3 3.4 3.6 5.0 5.4 6.0 6.2 m m m
8 3.3 3.4 3.4 3.4 3.7 4.7 5.9 5.9 5.5 m m m
9 3.3 3.3 3.4 3.3 3.8 5.2 5.8 6.2 7.5 m m m
10 3.3 3.3 3.4 3.3 3.7 5.3 5.8 6.3 6.7 m m m
11 3.3 3.3 3.4 3.3 3.7 5.1 5.7 5.5 6.8 m m m
12 3.3 3.3 3.4 3.3 3.8 5.2 5.4 5.9 6.8 m m m
13 3.3 3.3 3.4 3.4 3.7 5.0 5.9 5.8 7.7 m m m
14 3.2 3.3 3.4 3.4 3.7 5.1 5.8 5.7 6.9 m m m
15 3.2 3.3 3.5 3.4 3.7 5.1 5.8 6.0 6.2 m m m
16 3.3 3.3 3.5 3.5 3.8 5.5 5.7 6.1 6.6 m m m
17 3.3 3.3 3.4 3.5 3.8 5.3 6.0 6.2 6.4 m m m
18 3.3 3.3 3.4 3.4 3.8 5.2 5.7 6.2 6.5 m m m
19 3.3 3.3 3.4 3.4 3.8 5.9 5.7 5.9 6.5 m m m
20 3.3 3.3 3.4 3.4 3.8 5.5 6.0 5.5 6.8 m m m
21 3.3 3.3 3.4 3.4 3.9 5.5 6.0 5.9 6.9 m m m
22 3.3 3.4 3.4 3.4 3.9 5.8 5.8 5.9 7.0 m m m
23 3.3 3.4 3.4 3.4 3.9 6.4 5.6 5.9 7.2 m m m
24 3.3 3.4 3.3 3.4 3.9 5.8 5.8 5.8 7.1 m m m
25 3.3 3.4 3.4 3.4 3.9 5.3 5.9 6.1 6.3 m m m
26 3.3 3.4 3.4 3.4 3.9 5.3 5.7 5.9 6.9 m m m
27 3.3 3.4 3.4 3.4 3.9 5.7 5.7 5.9 m m m m
28 3.3 3.4 3.4 3.5 3.9 5.8 5.7 6.0 m m m m
29 3.3 --- 3.4 3.4 4.0 5.5 5.8 6.3 m m m m
30 3.3 --- 3.4 3.4 4.0 5.7 5.8 5.9 m m m m
31 3.3 --- 3.4 --- 4.2 --- 5.7 5.7 --- m --- m
Mean 3.3 3.3 3.4 3.4 3.8 5.2 5.8 5.9 6.6 m m m
Min 3.2 3.3 3.3 3.3 3.4 4.1 5.4 5.5 5.5 m m m
Max 3.3 3.4 3.5 3.5 4.2 6.4 6.0 6.3 7.7 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1b Page 10 June 2014
Table A.1b-10. Grant Lake – GL 19.5m daily mean temperature (C), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 3.2 3.3 3.4 3.3 3.4 4.1 5.7 5.5 5.6 m m m
2 3.2 3.3 3.4 3.3 3.4 4.3 5.7 5.7 5.5 m m m
3 3.3 3.3 3.4 3.3 3.4 4.1 5.5 5.7 6.5 m m m
4 3.3 3.3 3.3 3.4 3.5 4.9 5.6 5.7 6.0 m m m
5 3.3 3.3 3.3 3.4 3.5 4.6 5.6 5.7 6.2 m m m
6 3.3 3.3 3.3 3.4 3.5 5.3 5.5 5.4 6.0 m m m
7 3.3 3.4 3.3 3.4 3.6 4.9 5.3 5.8 6.0 m m m
8 3.3 3.3 3.3 3.4 3.7 4.6 5.8 5.8 5.4 m m m
9 3.3 3.3 3.3 3.3 3.7 5.1 5.7 6.1 7.0 m m m
10 3.3 3.3 3.4 3.3 3.7 5.2 5.7 6.1 6.5 m m m
11 3.3 3.3 3.4 3.3 3.7 5.0 5.6 5.4 6.2 m m m
12 3.3 3.3 3.5 3.3 3.7 5.1 5.3 5.8 6.3 m m m
13 3.2 3.3 3.4 3.3 3.7 4.9 5.7 5.7 6.7 m m m
14 3.2 3.3 3.4 3.4 3.7 5.1 5.7 5.6 6.4 m m m
15 3.2 3.3 3.4 3.4 3.7 5.0 5.6 5.8 5.9 m m m
16 3.3 3.3 3.4 3.4 3.8 5.4 5.6 6.0 6.1 m m m
17 3.3 3.3 3.4 3.4 3.8 5.2 5.9 6.0 6.1 m m m
18 3.3 3.3 3.4 3.4 3.8 5.1 5.5 5.9 6.1 m m m
19 3.3 3.3 3.4 3.4 3.8 5.7 5.6 5.9 6.2 m m m
20 3.3 3.3 3.4 3.4 3.8 5.4 5.9 5.4 6.4 m m m
21 3.3 3.3 3.4 3.4 3.9 5.4 5.9 5.9 6.7 m m m
22 3.3 3.3 3.4 3.3 3.9 5.7 5.7 5.7 6.6 m m m
23 3.3 3.3 3.4 3.4 3.9 6.2 5.5 5.7 6.8 m m m
24 3.3 3.4 3.3 3.4 3.9 5.8 5.6 5.6 6.5 m m m
25 3.3 3.4 3.4 3.4 3.9 5.2 5.9 6.0 6.2 m m m
26 3.3 3.4 3.3 3.4 3.9 5.2 5.6 5.9 6.7 m m m
27 3.3 3.4 3.3 3.4 3.9 5.6 5.6 5.7 m m m m
28 3.3 3.4 3.3 3.4 3.9 5.7 5.6 5.8 m m m m
29 3.3 --- 3.4 3.4 4.0 5.4 5.7 6.1 m m m m
30 3.3 --- 3.3 3.4 4.0 5.6 5.7 5.8 m m m m
31 3.3 --- 3.3 --- 4.1 --- 5.5 5.5 --- m --- m
Mean 3.3 3.3 3.4 3.4 3.7 5.2 5.6 5.8 6.3 m m m
Min 3.2 3.3 3.3 3.3 3.4 4.1 5.3 5.4 5.4 m m m
Max 3.3 3.4 3.5 3.4 4.1 6.2 5.9 6.1 7.0 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 June 2014
Appendix 1c. Historical Grant Creek Temperature Records – 2013
This appendix contains the following figures and tables:
Figure A.1c-1 Grant Creek and Falls Creek – daily mean temperature (C), calendar year 2009.
Table A.1c-1 Grant Creek – near USGS gaging station 15246000 daily mean temperature (C),
calendar year 1982.
Table A.1c-2 Grant Creek – near USGS gaging station 15246000 instantaneous water
temperatures (C), 1982-1983.
Table A.1c-3 Grant Creek – GC250 daily mean temperature (C), calendar year 2009.
Table A.1c-4 Grant Creek – GC250 daily mean temperature (C), calendar year 2010.
Table A.1c-5 Grant Creek – GC250 daily mean temperature (C), calendar year 2011.
Table A.1c-6 Grant Creek – GC200 daily mean temperature (C), calendar year 2012.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1c Page 1 June 2014
Figure A.1c-1. Grant Creek and Falls Creek – daily mean temperature (C), calendar year 2009. (Figure
reproduced from HDR 2009)
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1c Page 2 June 2014
Table A.1c-1. Grant Creek – near USGS gaging station 15246000 daily mean temperature (C), calendar
year 1982. (Table reproduced from Ebasco 1984)
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1c Page 3 June 2014
Table A.1c-2. Grant Creek – near USGS gaging station 15246000 instantaneous water temperature (C),
1982-1983. (Table reproduced from Ebasco 1984)
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1c Page 4 June 2014
Table A.1c-3. Grant Creek – GC250 daily mean temperature (C), calendar year 2009.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 m m m m m m m m m m 5.4 2.7
2 m m m m m m m m m m 5.1 2.7
3 m m m m m m m m m m 5.2 2.6
4 m m m m m m m m m m 5.3 2.3
5 m m m m m m m m m m 5.4 1.7
6 m m m m m m m m m m 5.3 1.7
7 m m m m m m m m m m 5.2 1.6
8 m m m m m m m m m m 4.9 1.8
9 m m m m m m m m m m 4.5 1.5
10 m m m m m m m m m m 4.4 1.2
11 m m m m m m m m m m 4.3 1.1
12 m m m m m m m m m 8.0 4.0 1.0
13 m m m m m m m m m 7.8 3.9 1.2
14 m m m m m m m m m 7.8 3.3 1.5
15 m m m m m m m m m 7.8 2.9 1.3
16 m m m m m m m m m 7.6 2.6 1.2
17 m m m m m m m m m 7.4 2.6 0.9
18 m m m m m m m m m 7.4 2.5 0.6
19 m m m m m m m m m 7.2 2.3 0.9
20 m m m m m m m m m 7.2 2.9 1.4
21 m m m m m m m m m 7.1 3.0 1.6
22 m m m m m m m m m 7.1 3.1 1.6
23 m m m m m m m m m 7.0 2.5 1.6
24 m m m m m m m m m 6.8 3.0 1.6
25 m m m m m m m m m 6.7 2.8 1.7
26 m m m m m m m m m 6.6 2.8 1.6
27 m m m m m m m m m 6.5 2.8 1.6
28 m m m m m m m m m 6.4 2.9 1.5
29 m --- m m m m m m m 5.9 2.5 1.3
30 m --- m m m m m m m 5.6 2.4 1.3
31 m --- m --- m --- m m --- 5.4 --- 1.5
Mean m m m m m m m m m 7.0 3.7 1.6
Min m m m m m m m m m 5.4 2.3 0.6
Max m m m m m m m m m 8.0 5.4 2.7
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1c Page 5 June 2014
Table A.1c-4. Grant Creek – GC250 daily mean temperature (C), calendar year 2010.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 0.9 1.4 2.4 1.7 3.4 9.6 9.4 10.7 11.1 8.8 5.1 0.8
2 0.7 1.4 2.4 2.0 3.4 9.8 10.9 10.3 11.3 8.7 5.0 1.0
3 1.3 1.4 2.3 1.8 3.6 8.6 11.2 11.0 11.1 8.5 4.8 1.0
4 1.6 0.9 2.1 1.9 3.7 9.2 10.4 10.9 10.7 8.3 4.7 1.1
5 1.6 0.9 2.2 1.7 3.7 9.6 10.0 11.9 10.9 8.0 4.7 0.9
6 1.6 1.2 2.1 1.8 3.7 9.3 9.9 11.1 10.9 7.9 4.7 1.1
7 1.7 1.3 1.7 1.5 3.8 9.2 10.5 11.2 11.8 7.7 4.6 1.3
8 1.4 1.0 1.8 1.4 3.9 8.5 10.4 11.0 11.2 7.5 4.3 1.0
9 1.6 1.4 1.9 1.4 4.0 8.6 10.1 11.5 10.6 7.4 4.3 0.7
10 1.3 1.7 1.5 1.5 3.4 8.9 10.1 10.7 9.8 7.3 4.2 0.9
11 0.7 1.8 1.3 1.7 1.8 9.6 9.9 11.7 10.1 7.2 4.4 0.9
12 0.9 1.7 1.4 1.8 3.4 9.7 9.7 11.4 10.3 6.9 4.4 0.6
13 1.2 1.7 1.7 1.8 3.8 9.2 10.5 11.8 9.4 6.7 4.3 0.6
14 1.4 1.8 1.7 1.7 3.8 8.3 10.3 12.6 9.5 6.4 4.1 0.7
15 1.3 1.9 2.0 1.7 4.0 9.0 9.9 11.9 9.8 6.4 3.8 0.5
16 1.5 2.0 1.8 1.6 4.1 8.9 10.2 11.0 9.4 6.3 3.1 0.5
17 1.5 2.1 1.5 2.0 4.3 8.4 10.1 10.6 11.7 6.3 2.9 0.4
18 1.3 2.0 1.9 2.0 4.5 8.8 10.3 12.5 11.3 6.4 3.0 0.5
19 1.1 2.1 2.0 1.9 4.7 8.9 10.8 12.2 11.3 6.2 3.1 0.7
20 1.1 2.0 2.0 1.9 5.2 9.7 10.6 11.5 10.9 6.1 3.1 0.9
21 0.7 2.1 1.9 2.1 4.9 9.9 11.1 11.7 10.9 6.0 3.0 0.6
22 0.7 2.2 2.0 2.1 4.7 10.4 11.3 11.3 10.8 6.0 3.5 0.6
23 0.5 2.4 1.9 2.3 5.6 10.6 11.6 12.6 10.7 5.8 3.3 0.5
24 0.7 2.4 1.9 2.3 5.6 10.4 10.1 11.9 10.4 5.8 3.4 0.5
25 0.6 2.2 1.8 2.6 6.1 10.7 10.2 12.0 10.2 5.8 3.4 0.7
26 0.9 1.8 1.5 2.9 7.2 11.2 10.4 11.1 9.7 5.5 2.9 0.8
27 1.2 1.7 1.7 3.0 8.3 10.4 10.8 11.1 9.1 5.4 2.8 0.9
28 1.5 2.0 1.9 3.1 8.9 10.4 10.3 11.0 8.9 5.5 2.1 0.8
29 1.4 --- 2.0 3.1 9.3 9.8 9.8 11.7 9.0 5.2 1.6 0.8
30 1.1 --- 2.0 3.2 9.5 10.0 10.7 11.3 8.9 5.0 1.2 1.2
31 1.2 --- 1.8 --- 9.7 --- 11.3 10.7 --- 4.9 --- 1.2
Mean 1.2 1.7 1.9 2.1 5.0 9.5 10.4 11.4 10.4 6.6 3.7 0.8
Min 0.5 0.9 1.3 1.4 1.8 8.3 9.4 10.3 8.9 4.9 1.2 0.4
Max 1.7 2.4 2.4 3.2 9.7 11.2 11.6 12.6 11.8 8.8 5.1 1.3
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1c Page 6 June 2014
Table A.1c-5. Grant Creek – GC250 daily mean temperature (C), calendar year 2011.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 1.4 1.7 m m m m m m m m m m
2 1.5 1.8 m m m m m m m m m m
3 1.6 1.6 m m m m m m m m m m
4 1.4 1.4 m m m m m m m m m m
5 1.4 1.1 m m m m m m m m m m
6 1.0 1.6 m m m m m m m m m m
7 0.8 m m m m m m m m m m m
8 0.7 m m m m m m m m m m m
9 0.8 m m m m m m m m m m m
10 0.8 m m m m m m m m m m m
11 0.8 m m m m m m m m m m m
12 0.6 m m m m m m m m m m m
13 0.5 m m m m m m m m m m m
14 0.4 m m m m m m m m m m m
15 0.4 m m m m m m m m m m m
16 0.3 m m m m m m m m m m m
17 0.6 m m m m m m m m m m m
18 0.7 m m m m m m m m m m m
19 1.0 m m m m m m m m m m m
20 1.3 m m m m m m m m m m m
21 1.5 m m m m m m m m m m m
22 1.4 m m m m m m m m m m m
23 1.0 m m m m m m m m m m m
24 1.6 m m m m m m m m m m m
25 1.7 m m m m m m m m m m m
26 1.6 m m m m m m m m m m m
27 1.4 m m m m m m m m m m m
28 1.2 m m m m m m m m m m m
29 1.4 --- m m m m m m m m m m
30 1.4 --- m m m m m m m m m m
31 1.5 --- m --- m --- m m --- m --- m
Mean 1.1 1.6 m m m m m m m m m m
Min 0.3 1.1 m m m m m m m m m m
Max 1.7 1.8 m m m m m m m m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1c Page 7 June 2014
Table A.1c-6. Grant Creek – GC200 daily mean temperature (C), calendar year 2012.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 m m m m m m m m m m m m
2 m m m m m m m m m m m m
3 m m m m m m m m m m m m
4 m m m m m m m m m m m m
5 m m m m m m m m m m m m
6 m m m m m m m m m m m m
7 m m m m m m m m m m m m
8 m m m m m m m m m m m m
9 m m m m m m m m m m m m
10 m m m m m m m m m m m m
11 m m m m m m m m m m m 1.0
12 m m m m m m m m m m m 1.1
13 m m m m m m m m m m m 1.3
14 m m m m m m m m m m m 0.6
15 m m m m m m m m m m m 0.6
16 m m m m m m m m m m m 0.4
17 m m m m m m m m m m m 0.2
18 m m m m m m m m m m m 0.5
19 m m m m m m m m m m m 0.6
20 m m m m m m m m m m m 0.4
21 m m m m m m m m m m m 0.2
22 m m m m m m m m m m m 0.2
23 m m m m m m m m m m m 0.6
24 m m m m m m m m m m m 0.9
25 m m m m m m m m m m m 1.1
26 m m m m m m m m m m m 1.2
27 m m m m m m m m m m m 1.4
28 m m m m m m m m m m m 1.5
29 m m m m m m m m m m m 1.4
30 m --- m m m m m m m m m 1.6
31 m --- m --- m --- m m --- m --- 1.6
Mean m m m m m m m m m m m 0.9
Min m m m m m m m m m m m 0.2
Max m m m m m m m m m m m 1.6
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1c Page 8 June 2014
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FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 June 2014
Appendix 1d. Historical Grant Lake Temperature Records – 2010-2013
This appendix contains the following figures and tables:
Figure A.1d-1 Grant Lake – daily mean temperature hydrograph (C), calendar year 2010.
Table A.1d-1 Grant Lake – GL 1.5m daily mean temperature (C), calendar year 2010.
Table A.1d-2 Grant Lake – GL 9.0m daily mean temperature (C), calendar year 2010.
Table A.1d-3 Grant Lake – GL 18.0m daily mean temperature (C), calendar year 2010.
Table A.1d-4 Grant Lake – GL 1.5m daily mean temperature (C), calendar year 2011.
Table A.1d-5 Grant Lake – GL 9.0m daily mean temperature (C), calendar year 2011.
Table A.1d-6 Grant Lake – GL 18.0m daily mean temperature (C), calendar year 2011.
Table A.1d-7 Grant Lake – GL 1.5m daily mean temperature (C), calendar year 2012.
Table A.1d-8 Grant Lake – GL 9.0m daily mean temperature (C), calendar year 2012.
Table A.1d-9 Grant Lake – GL 18.0m daily mean temperature (C), calendar year 2012.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1d Page 1 June 2014
Figure A.1d-1. Grant Lake – daily mean temperature (C), calendar year 2009 (Figure reproduced from
HDR 2009)
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1d Page 2 June 2014
Table A.1d-1. Grant Lake – GL 1.5m daily mean temperature (C), calendar year 2010.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 m m m m m m m m m 8.9 5.2 2.0
2 m m m m m m m m m 8.8 5.2 2.3
3 m m m m m m m m m 8.5 5.1 1.9
4 m m m m m m m m m 8.3 5.0 2.0
5 m m m m m m m m m 8.1 4.9 2.1
6 m m m m m m m m m 8.0 4.9 2.2
7 m m m m m m m m m 7.9 4.8 2.2
8 m m m m m m m m m 7.6 4.7 2.1
9 m m m m m m m m m 7.5 4.6 2.1
10 m m m m m m m m m 7.4 4.5 2.1
11 m m m m m m m m m 7.4 4.5 2.1
12 m m m m m m m m m 7.2 4.5 2.2
13 m m m m m m m m m 7.0 4.5 2.1
14 m m m m m m m m 11.6 6.8 4.4 2.1
15 m m m m m m m m 11.6 6.7 4.3 2.2
16 m m m m m m m m 11.7 6.6 4.2 2.2
17 m m m m m m m m 11.7 6.4 3.9 2.2
18 m m m m m m m m 11.6 6.4 3.1 2.2
19 m m m m m m m m 11.6 6.4 3.1 2.2
20 m m m m m m m m 11.3 6.3 3.2 2.3
21 m m m m m m m m 11.0 6.1 3.1 2.2
22 m m m m m m m m 11.0 6.1 3.4 2.2
23 m m m m m m m m 10.8 6.0 3.4 2.2
24 m m m m m m m m 10.7 5.9 3.1 2.2
25 m m m m m m m m 10.4 5.9 3.8 2.2
26 m m m m m m m m 10.1 5.8 3.9 2.2
27 m m m m m m m m 9.7 5.7 2.9 2.3
28 m m m m m m m m 9.3 5.6 3.2 2.2
29 m m m m m m m m 9.2 5.5 3.1 2.2
30 m m m m m m m m 9.1 5.4 2.6 2.3
31 m m m m m m m m 8.9 5.3 2.0 2.3
Mean m m m m m m m m 10.6 6.8 4.0 2.2
Min m m m m m m m m 8.9 5.3 2.0 1.9
Max m m m m m m m m 11.7 8.9 5.2 2.3
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1d Page 3 June 2014
Table A.1d-2. Grant Lake – GL 9.0m daily mean temperature (C), calendar year 2010.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 M m m m m m m m m 8.8 5.2 2.5
2 m m m m m m m m m 8.6 5.1 3.1
3 m m m m m m m m m 8.4 5.1 2.7
4 m m m m m m m m m 8.1 4.9 3.0
5 m m m m m m m m m 8.0 4.8 2.9
6 m m m m m m m m m 7.8 4.8 2.9
7 m m m m m m m m m 7.7 4.8 3.0
8 m m m m m m m m m 7.6 4.7 2.9
9 m m m m m m m m m 7.5 4.6 3.0
10 m m m m m m m m m 7.3 4.5 3.0
11 m m m m m m m m m 7.2 4.4 2.9
12 m m m m m m m m m 7.1 4.4 3.0
13 m m m m m m m m m 6.9 4.4 2.9
14 m m m m m m m m 9.5 6.7 4.4 3.0
15 m m m m m m m m 9.5 6.6 4.3 2.9
16 m m m m m m m m 9.5 6.5 4.2 2.9
17 m m m m m m m m 9.4 6.4 3.9 3.0
18 m m m m m m m m 9.8 6.3 3.5 2.9
19 m m m m m m m m 9.1 6.3 3.5 2.9
20 m m m m m m m m 9.5 6.2 3.7 3.0
21 m m m m m m m m 9.7 6.1 3.7 2.9
22 m m m m m m m m 9.7 6.0 3.6 2.9
23 m m m m m m m m 9.7 6.0 3.8 3.0
24 m m m m m m m m 9.9 5.9 3.3 2.9
25 m m m m m m m m 9.9 5.8 3.9 2.9
26 m m m m m m m m 9.5 5.8 3.9 3.0
27 m m m m m m m m 9.5 5.6 3.4 2.9
28 m m m m m m m m 9.2 5.6 3.5 2.9
29 m m m m m m m m 9.0 5.5 3.2 3.0
30 m m m m m m m m 8.8 5.4 2.7 3.0
31 m m m m m m m m 8.8 5.2 2.5 3.0
Mean m m m m m m m m 9.4 6.7 4.1 2.9
Min m m m m m m m m 8.8 5.2 2.5 2.5
Max m m m m m m m m 9.9 8.8 5.2 3.1
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1d Page 4 June 2014
Table A.1d-3. Grant Lake – GL 18.0m daily mean temperature (C), calendar year 2010.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 m m m m m m m m m 6.9 5.1 2.8
2 m m m m m m m m m 6.6 5.0 3.4
3 m m m m m m m m m 7.8 5.0 3.1
4 m m m m m m m m m 6.6 4.9 3.3
5 m m m m m m m m m 6.6 4.8 3.3
6 m m m m m m m m m 6.4 4.7 3.2
7 m m m m m m m m m 6.8 4.7 3.3
8 m m m m m m m m m 7.1 4.6 3.3
9 m m m m m m m m m 6.1 4.5 3.2
10 m m m m m m m m m 6.7 4.4 3.2
11 m m m m m m m m m 6.6 4.4 3.3
12 m m m m m m m m m 6.7 4.4 3.3
13 m m m m m m m m m 6.1 4.4 3.3
14 m m m m m m m m 6.2 6.6 4.3 3.3
15 m m m m m m m m 6.1 6.5 4.2 3.3
16 m m m m m m m m 5.9 6.4 4.1 3.3
17 m m m m m m m m 6.0 6.0 3.9 3.3
18 m m m m m m m m 6.0 6.3 3.6 3.3
19 m m m m m m m m 6.2 6.0 3.6 3.3
20 m m m m m m m m 5.6 5.9 3.7 3.3
21 m m m m m m m m 6.1 6.0 3.8 3.3
22 m m m m m m m m 6.3 6.0 3.8 3.3
23 m m m m m m m m 6.6 5.9 3.9 3.3
24 m m m m m m m m 5.7 5.8 3.6 3.3
25 m m m m m m m m 5.7 5.7 3.9 3.2
26 m m m m m m m m 6.2 5.6 3.8 3.3
27 m m m m m m m m 6.2 5.6 3.5 3.3
28 m m m m m m m m 6.5 5.4 3.4 3.3
29 m m m m m m m m 5.7 5.4 3.2 3.3
30 m m m m m m m m 7.1 5.3 3.1 3.3
31 m m m m m m m m 6.9 5.2 2.8 3.3
Mean m m m m m m m m 6.2 6.2 4.1 3.3
Min m m m m m m m m 5.6 5.2 2.8 2.8
Max m m m m m m m m 7.1 7.8 5.1 3.4
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1d Page 5 June 2014
Table A.1d-4. Grant Lake – GL 1.5m daily mean temperature (C), calendar year 2011.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 2.3 2.6 2.8 3.3 4.1 6.8 11.1 13.5 11.6 8.0 5.0 2.4
2 2.3 2.6 2.7 3.2 4.2 7.3 11.4 13.8 11.5 7.8 4.9 2.2
3 2.3 2.6 2.7 3.2 4.2 6.5 11.4 13.4 11.3 7.5 4.7 2.2
4 2.3 2.6 2.8 3.3 4.3 6.6 12.0 12.8 11.2 7.4 4.7 2.3
5 2.3 2.6 2.8 3.3 4.4 6.7 12.0 12.4 10.9 7.3 4.6 2.3
6 2.3 2.7 2.7 3.2 4.6 7.2 12.1 12.4 10.6 7.1 4.5 2.3
7 2.3 2.7 2.7 3.2 4.8 7.0 11.9 12.3 10.5 7.2 4.5 2.4
8 2.3 2.7 2.8 3.2 4.8 7.2 12.0 12.6 10.4 7.1 4.4 2.4
9 2.3 2.7 2.7 3.3 5.2 7.2 12.0 12.3 10.3 7.0 4.2 2.4
10 2.3 2.7 2.7 3.3 5.5 7.4 12.0 12.6 10.2 6.9 4.2 2.4
11 2.4 2.7 2.7 3.3 5.7 7.3 12.1 12.6 10.1 6.8 4.1 2.4
12 2.4 2.7 2.8 3.3 5.7 7.3 11.9 12.9 10.3 6.6 4.1 2.4
13 2.4 2.7 2.8 3.4 5.7 7.6 12.7 12.9 10.1 6.5 4.1 2.4
14 2.4 2.7 2.7 3.4 5.3 7.8 12.8 13.0 10.0 6.4 3.7 2.4
15 2.4 2.7 2.9 3.5 5.2 7.9 13.3 13.3 9.7 6.4 3.2 2.4
16 2.4 2.7 2.7 3.6 5.0 8.3 12.6 13.1 9.6 6.4 3.8 2.3
17 2.4 2.7 2.7 3.7 4.8 8.9 12.8 13.1 9.6 6.3 3.4 2.3
18 2.5 2.7 2.8 3.7 4.2 9.0 12.7 12.5 9.5 6.2 2.2 2.4
19 2.5 2.8 2.6 3.7 4.2 9.3 13.2 12.3 9.2 6.0 1.9 2.5
20 2.5 2.8 2.7 3.7 4.3 9.6 13.7 12.1 9.0 5.9 2.1 2.5
21 2.5 2.7 2.8 3.8 4.4 10.0 13.7 11.9 9.0 5.9 2.6 2.5
22 2.5 2.7 2.8 3.7 4.5 10.3 13.4 12.0 8.9 5.8 2.1 2.5
23 2.5 2.7 2.9 3.8 4.6 10.2 13.9 12.3 8.7 5.8 2.1 2.5
24 2.5 2.7 2.9 3.8 5.1 10.8 13.2 12.1 8.7 5.7 2.1 2.4
25 2.5 2.7 2.9 3.8 5.2 11.0 13.3 11.8 8.6 5.6 2.2 2.5
26 2.5 2.7 2.9 3.8 5.6 11.3 13.6 12.0 8.5 5.6 2.2 2.5
27 2.6 2.7 2.9 3.9 6.1 10.9 13.5 11.8 8.4 5.4 2.4 2.4
28 2.6 2.7 3.0 4.0 6.4 10.6 13.8 11.7 8.3 5.4 2.3 2.4
29 2.6 --- 3.0 3.9 6.4 11.0 13.8 11.7 8.4 5.3 2.2 2.4
30 2.6 --- 3.1 3.9 6.7 11.2 14.3 11.5 8.2 5.3 2.4 2.4
31 2.6 --- 3.2 --- 6.3 --- 14.0 11.7 --- 5.1 --- 2.4
Mean 2.4 2.7 2.8 3.5 5.1 8.7 12.8 12.5 9.7 6.4 3.4 2.4
Min 2.3 2.6 2.6 3.2 4.1 6.5 11.1 11.5 8.2 5.1 1.9 2.2
Max 2.6 2.8 3.2 4.0 6.7 11.3 14.3 13.8 11.6 8.0 5.0 2.5
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1d Page 6 June 2014
Table A.1d-5. Grant Lake – GL 9.0m daily mean temperature (C), calendar year 2011.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 2.9 3.0 3.1 3.3 3.9 6.0 9.1 10.8 11.1 7.9 5.0 3.2
2 2.9 3.0 3.1 3.2 3.9 6.1 8.5 11.4 10.7 7.7 4.8 3.2
3 2.9 3.0 3.1 3.2 3.9 5.7 9.1 12.0 11.1 7.4 4.7 3.3
4 2.9 3.0 3.1 3.3 3.9 5.9 8.9 10.6 11.0 7.3 4.6 3.3
5 2.9 3.0 3.1 3.3 3.9 6.1 8.6 11.3 10.7 7.2 4.6 3.2
6 2.9 3.0 3.1 3.3 4.0 6.3 8.8 11.0 10.3 7.1 4.5 3.2
7 2.9 3.0 3.1 3.3 4.0 6.3 8.7 11.3 10.1 7.0 4.5 3.3
8 3.0 3.0 3.1 3.3 4.0 6.4 9.1 10.6 9.7 7.0 4.4 3.3
9 2.9 3.1 3.1 3.3 4.2 6.3 10.0 11.2 9.8 6.9 4.2 3.2
10 2.9 3.0 3.1 3.3 4.3 6.4 9.3 10.6 9.5 6.8 4.1 3.3
11 2.9 3.0 3.1 3.3 4.3 6.4 9.7 11.1 9.7 6.7 4.1 3.3
12 2.9 3.0 3.1 3.3 4.3 6.4 10.1 10.6 9.9 6.6 4.1 3.3
13 3.0 3.1 3.1 3.3 4.3 6.6 9.7 10.9 9.9 6.4 4.0 3.2
14 3.0 3.1 3.1 3.4 4.4 7.0 10.2 10.8 9.3 6.4 3.9 3.3
15 3.0 3.0 3.1 3.4 4.5 7.3 9.8 10.7 9.5 6.3 3.6 3.3
16 3.0 3.1 3.1 3.5 4.5 7.2 9.7 11.0 9.5 6.3 3.8 3.3
17 2.9 3.1 3.2 3.5 4.6 7.5 9.8 11.0 9.4 6.2 3.5 3.2
18 3.0 3.1 3.2 3.6 4.1 7.3 10.3 10.8 9.3 6.1 3.3 3.2
19 3.0 3.1 3.1 3.6 4.1 7.7 10.5 11.8 9.1 6.0 2.9 3.3
20 3.0 3.1 3.1 3.6 4.2 7.6 9.9 10.9 8.8 5.9 3.0 3.2
21 3.0 3.1 3.1 3.6 4.3 7.9 10.6 11.2 8.5 5.8 3.1 3.3
22 3.0 3.1 3.1 3.7 4.3 7.6 9.9 11.3 8.4 5.8 3.1 3.3
23 3.0 3.0 3.1 3.7 4.4 8.1 9.9 10.9 8.3 5.7 3.0 3.3
24 3.0 3.1 3.1 3.7 4.7 8.2 10.5 11.2 8.3 5.7 3.3 3.3
25 3.0 3.0 3.1 3.7 4.9 8.0 10.7 11.3 8.4 5.6 3.2 3.2
26 3.0 3.0 3.1 3.8 5.3 8.6 10.4 11.7 8.1 5.5 3.2 3.3
27 3.0 3.0 3.2 3.8 5.6 7.9 10.6 11.1 8.2 5.4 3.2 3.3
28 3.0 3.1 3.2 3.8 5.0 8.7 10.7 11.2 8.1 5.3 3.2 3.3
29 3.0 --- 3.2 3.8 5.2 8.6 11.1 11.0 8.2 5.3 3.2 3.3
30 3.0 --- 3.2 3.8 5.7 8.4 10.4 11.0 8.0 5.2 3.2 3.3
31 3.0 --- 3.2 --- 5.6 --- 10.4 10.7 --- 5.1 --- 3.3
Mean 3.0 3.0 3.1 3.5 4.5 7.2 9.8 11.1 9.4 6.3 3.8 3.3
Min 2.9 3.0 3.1 3.2 3.9 5.7 8.5 10.6 8.0 5.1 2.9 3.2
Max 3.0 3.1 3.2 3.8 5.7 8.7 11.1 12.0 11.1 7.9 5.0 3.3
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1d Page 7 June 2014
Table A.1d-6. Grant Lake – GL 18.0m daily mean temperature (C), calendar year 2011.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 3.3 3.3 3.3 3.3 3.8 5.2 5.7 5.8 5.9 7.8 4.9 3.4
2 3.3 3.3 3.3 3.3 3.9 5.1 6.0 5.9 6.8 7.0 4.8 3.4
3 3.3 3.3 3.3 3.4 3.9 4.8 6.1 6.1 6.6 7.0 4.6 3.4
4 3.3 3.2 3.3 3.3 3.8 5.1 5.8 6.4 6.4 6.8 4.5 3.4
5 3.2 3.3 3.3 3.3 3.9 5.4 5.8 5.6 7.9 6.8 4.5 3.4
6 3.3 3.3 3.3 3.3 3.9 5.3 5.6 6.2 7.4 6.8 4.4 3.4
7 3.2 3.3 3.3 3.4 3.9 5.3 6.0 5.9 7.2 6.8 4.4 3.4
8 3.3 3.2 3.3 3.4 3.9 5.3 5.8 6.2 7.5 6.6 4.3 3.4
9 3.3 3.3 3.3 3.4 3.9 5.5 5.5 5.7 6.6 6.7 4.1 3.4
10 3.3 3.3 3.3 3.4 3.9 5.5 5.7 6.2 7.3 6.7 4.0 3.4
11 3.3 3.3 3.3 3.3 4.0 5.5 6.2 5.8 7.1 6.6 4.0 3.4
12 3.3 3.3 3.3 3.3 4.0 5.4 5.3 5.8 8.2 6.5 4.0 3.4
13 3.3 3.3 3.3 3.3 4.0 5.5 6.0 6.0 7.1 6.4 4.0 3.4
14 3.3 3.3 3.3 3.3 4.0 5.6 6.0 6.1 7.4 6.3 3.9 3.4
15 3.3 3.3 3.3 3.4 4.0 5.8 6.3 6.2 8.1 6.2 3.7 3.4
16 3.3 3.3 3.3 3.4 4.1 5.5 6.0 5.8 9.0 6.1 3.7 3.5
17 3.3 3.3 3.3 3.5 4.3 5.7 5.8 6.1 6.9 6.1 3.4 3.4
18 3.3 3.3 3.3 3.5 4.0 5.7 5.9 5.9 7.1 6.0 3.4 3.4
19 3.3 3.3 3.3 3.5 4.1 5.8 5.8 6.6 8.5 5.9 3.4 3.4
20 3.2 3.3 3.4 3.6 4.1 5.9 5.9 6.6 7.5 5.8 3.3 3.4
21 3.3 3.2 3.4 3.6 4.2 5.4 6.0 5.7 7.6 5.7 3.3 3.4
22 3.3 3.3 3.3 3.6 4.1 5.8 5.6 6.3 7.7 5.7 3.4 3.4
23 3.2 3.3 3.4 3.6 4.3 5.6 6.4 6.2 7.4 5.7 3.4 3.4
24 3.2 3.3 3.3 3.7 4.5 5.7 5.7 6.2 7.5 5.6 3.4 3.4
25 3.2 3.3 3.3 3.7 4.7 5.9 6.0 6.0 7.3 5.5 3.4 3.5
26 3.3 3.3 3.3 3.7 4.9 5.7 5.8 6.3 7.4 5.4 3.4 3.5
27 3.2 3.3 3.3 3.7 5.0 5.9 6.0 6.1 7.5 5.3 3.4 3.4
28 3.3 3.3 3.3 3.7 4.6 5.3 5.9 6.3 7.3 5.3 3.5 3.4
29 3.3 --- 3.3 3.8 4.7 5.8 6.0 5.6 7.3 5.2 3.3 3.4
30 3.3 --- 3.3 3.8 5.0 5.8 6.0 6.4 7.3 5.1 3.4 3.4
31 3.3 --- 3.4 --- 4.8 --- 6.1 6.3 --- 5.0 --- 3.4
Mean 3.3 3.3 3.3 3.5 4.2 5.5 5.9 6.1 7.4 6.2 3.8 3.4
Min 3.2 3.2 3.3 3.3 3.8 4.8 5.3 5.6 5.9 5.0 3.3 3.4
Max 3.3 3.3 3.4 3.8 5.0 5.9 6.4 6.6 9.0 7.8 4.9 3.5
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1d Page 8 June 2014
Table A.1d-7. Grant Lake – GL 1.5m daily mean temperature (C), calendar year 2012.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 2.4 2.2 2.2 2.1 2.6 4.9 10.3 10.3 10.6 6.9 4.4 1.9
2 2.4 2.2 2.2 2.1 2.6 5.2 10.7 10.5 10.6 6.9 4.4 1.9
3 2.3 2.3 2.2 2.1 2.7 4.7 9.2 10.5 10.2 6.9 4.4 1.9
4 2.3 2.3 2.2 2.1 2.8 5.2 9.7 10.7 9.8 6.8 4.3 2.0
5 2.3 2.3 2.2 2.1 3.0 5.4 10.9 10.4 9.7 6.8 4.3 1.9
6 2.3 2.3 2.2 2.1 2.9 6.8 10.5 10.5 9.8 6.8 4.2 1.8
7 2.3 2.3 2.2 2.1 3.0 6.4 10.0 10.7 9.7 6.7 4.0 2.0
8 2.3 2.3 2.2 2.1 3.0 6.7 9.7 10.5 9.7 6.8 3.6 2.0
9 2.3 2.3 2.2 2.1 3.0 7.2 9.7 10.7 9.4 6.8 4.0 2.0
10 2.3 2.3 2.1 2.1 3.0 6.9 9.6 10.5 9.5 7.0 4.0 1.9
11 2.2 2.3 2.2 2.1 2.9 7.4 8.8 10.6 9.3 6.9 4.0 2.0
12 2.3 2.2 2.2 2.2 3.0 7.3 9.0 11.0 9.3 6.7 3.9 2.0
13 2.3 2.3 2.1 2.2 3.2 7.1 8.9 10.9 9.3 6.6 3.8 2.0
14 2.2 2.3 2.1 2.1 3.4 7.2 9.1 11.5 9.1 6.5 3.9 2.1
15 2.3 2.2 2.1 2.1 3.4 7.4 8.5 11.6 9.0 6.4 3.8 2.1
16 2.3 2.2 2.2 2.2 3.5 7.7 9.0 12.5 8.9 6.3 3.9 2.0
17 2.2 2.3 2.1 2.3 3.7 7.5 9.4 11.8 8.7 6.2 3.6 2.0
18 2.2 2.2 2.1 2.4 3.8 7.6 10.1 12.3 8.4 6.0 2.6 2.1
19 2.2 2.3 2.1 2.4 3.9 7.7 10.6 11.1 8.3 5.9 3.2 2.1
20 2.2 2.3 2.1 2.5 3.5 7.9 10.7 11.3 8.3 5.7 2.1 2.1
21 2.2 2.2 2.2 2.6 3.3 9.1 10.7 11.4 8.2 5.6 2.2 2.0
22 2.2 2.2 2.1 2.7 3.5 9.5 10.9 11.2 8.2 5.5 2.0 2.1
23 2.2 2.2 2.1 2.7 3.9 10.0 10.0 11.1 8.2 5.3 1.7 2.1
24 2.2 2.2 2.1 2.7 4.3 9.7 9.8 11.5 8.1 5.2 1.5 2.1
25 2.3 2.2 2.1 2.8 4.0 10.7 10.2 11.4 7.8 5.1 1.6 2.1
26 2.2 2.2 2.1 2.8 4.1 10.6 10.4 11.3 7.7 5.0 2.0 2.1
27 2.2 2.2 2.1 2.9 4.4 10.0 10.7 10.9 7.4 4.8 1.8 2.1
28 2.3 2.2 2.1 2.8 4.3 10.3 11.3 11.2 7.3 4.8 1.8 2.1
29 2.3 2.2 2.1 2.7 4.5 10.5 10.1 11.4 7.2 4.7 1.6 2.2
30 2.3 --- 2.1 2.7 4.6 9.8 10.9 10.8 7.1 4.6 1.7 2.2
31 2.2 --- 2.1 --- 4.6 --- 11.2 10.6 --- 4.5 --- 2.2
Mean 2.3 2.2 2.1 2.4 3.5 7.8 10.0 11.1 8.8 6.0 3.1 2.0
Min 2.2 2.2 2.1 2.1 2.6 4.7 8.5 10.3 7.1 4.5 1.5 1.8
Max 2.4 2.3 2.2 2.9 4.6 10.7 11.3 12.5 10.6 7.0 4.4 2.2
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1d Page 9 June 2014
Table A.1d-8. Grant Lake – GL 9.0m daily mean temperature (C), calendar year 2012
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 3.3 3.3 3.3 3.3 3.4 4.7 7.8 8.8 9.4 6.8 4.4 3.0
2 3.3 3.3 3.3 3.3 3.4 4.8 7.8 8.2 9.6 6.8 4.3 2.9
3 3.3 3.3 3.3 3.3 3.4 4.6 7.4 8.7 9.8 6.8 4.3 3.0
4 3.3 3.3 3.3 3.3 3.4 4.7 8.7 8.6 9.4 6.8 4.3 2.9
5 3.3 3.3 3.3 3.3 3.4 4.7 10.3 8.9 8.9 6.7 4.2 3.1
6 3.3 3.3 3.3 3.3 3.4 5.4 9.2 9.8 9.4 6.5 4.2 3.1
7 3.3 3.3 3.3 3.3 3.5 5.4 9.6 9.9 9.0 6.6 4.0 3.1
8 3.3 3.3 3.3 3.3 3.5 6.1 9.1 9.0 9.0 6.7 3.7 3.0
9 3.3 3.3 3.3 3.3 3.5 5.8 9.3 8.6 9.1 6.7 3.9 3.0
10 3.3 3.3 3.3 3.3 3.5 6.5 8.5 9.1 9.1 6.8 4.0 3.0
11 3.3 3.3 3.3 3.3 3.5 7.1 8.4 8.9 8.9 6.8 4.0 3.0
12 3.3 3.3 3.3 3.3 3.5 6.4 8.7 8.6 9.2 6.6 3.9 2.9
13 3.3 3.3 3.3 3.3 3.5 6.1 8.6 9.0 8.4 6.5 3.8 3.0
14 3.3 3.3 3.3 3.3 3.5 6.8 8.3 8.8 8.8 6.4 3.9 3.0
15 3.3 3.3 3.3 3.3 3.5 7.2 8.1 9.2 8.8 6.4 3.8 3.0
16 3.3 3.3 3.3 3.3 3.5 6.8 8.4 8.4 8.7 6.3 3.8 3.0
17 3.3 3.3 3.3 3.3 3.5 6.2 8.4 8.9 8.3 6.2 3.7 3.1
18 3.3 3.3 3.3 3.4 3.6 6.2 8.2 8.7 8.2 6.0 3.3 3.0
19 3.3 3.3 3.3 3.3 3.6 6.3 8.3 9.1 8.2 5.8 3.5 2.9
20 3.3 3.3 3.3 3.4 3.6 6.6 8.2 9.5 8.1 5.7 3.3 3.0
21 3.3 3.3 3.3 3.4 3.5 7.4 8.4 9.1 7.8 5.5 3.2 3.0
22 3.3 3.3 3.3 3.4 3.6 7.3 8.1 9.1 8.1 5.4 3.1 3.0
23 3.3 3.3 3.3 3.4 3.6 7.2 8.6 10.1 8.0 5.3 3.1 3.0
24 3.3 3.3 3.3 3.4 3.8 7.6 8.4 9.0 7.7 5.1 2.8 3.0
25 3.3 3.3 3.3 3.4 3.8 7.9 8.3 9.4 7.7 5.0 2.8 3.0
26 3.3 3.3 3.3 3.4 3.9 7.7 8.2 9.2 7.6 4.9 2.9 2.9
27 3.3 3.3 3.3 3.4 4.3 7.9 8.5 9.8 7.4 4.8 2.9 3.0
28 3.3 3.3 3.3 3.4 4.1 7.5 8.2 9.0 7.2 4.7 3.1 3.0
29 3.3 3.3 3.3 3.4 4.4 7.6 8.1 9.2 7.0 4.6 2.9 3.0
30 3.3 --- 3.3 3.4 4.5 7.0 8.4 9.4 6.9 4.6 3.2 3.0
31 3.3 --- 3.3 --- 4.5 --- 8.4 9.9 --- 4.5 --- 3.0
Mean 3.3 3.3 3.3 3.3 3.7 6.4 8.5 9.1 8.5 5.9 3.6 3.0
Min 3.3 3.3 3.3 3.3 3.4 4.6 7.4 8.2 6.9 4.5 2.8 2.9
Max 3.3 3.3 3.3 3.4 4.5 7.9 10.3 10.1 9.8 6.8 4.4 3.1
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 1d Page 10 June 2014
Table A.1d-9. Grant Lake – GL 18.0m daily mean temperature (C), calendar year 2012.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 3.4 3.4 3.5 3.4 3.5 4.5 6.5 7.2 7.4 6.7 4.3 3.4
2 3.4 3.4 3.4 3.4 3.5 4.6 6.0 6.8 8.0 6.7 4.2 3.3
3 3.4 3.4 3.4 3.4 3.5 4.4 5.9 7.1 8.1 6.7 4.2 3.3
4 3.4 3.5 3.5 3.4 3.5 4.4 6.4 7.3 8.2 6.7 4.2 3.2
5 3.4 3.4 3.5 3.4 3.5 4.6 6.3 7.8 7.9 6.6 4.1 3.2
6 3.4 3.4 3.5 3.4 3.5 4.9 6.6 6.9 8.1 6.3 4.0 3.2
7 3.4 3.4 3.5 3.5 3.5 4.9 6.5 7.0 7.4 6.5 3.9 3.2
8 3.4 3.4 3.4 3.4 3.5 5.5 7.2 7.0 8.0 6.5 3.6 3.2
9 3.4 3.4 3.4 3.4 3.5 4.9 6.9 7.2 8.1 6.6 3.8 3.3
10 3.5 3.5 3.4 3.4 3.5 6.0 5.9 7.4 7.9 6.6 3.9 3.3
11 3.5 3.4 3.4 3.4 3.5 6.1 7.4 7.3 8.0 6.6 3.9 3.3
12 3.5 3.4 3.4 3.4 3.5 5.1 6.7 7.3 8.4 6.4 3.8 3.3
13 3.5 3.4 3.4 3.4 3.6 5.6 7.8 6.7 7.7 6.4 3.6 3.3
14 3.4 3.4 3.4 3.4 3.6 6.1 7.1 7.2 8.3 6.4 3.8 3.3
15 3.4 3.5 3.4 3.4 3.6 6.9 7.6 7.0 7.8 6.3 3.7 3.2
16 3.4 3.5 3.4 3.4 3.5 5.4 7.3 7.2 8.2 6.2 3.8 3.3
17 3.4 3.5 3.4 3.4 3.5 5.6 7.4 7.3 7.5 6.1 3.7 3.3
18 3.4 3.5 3.4 3.4 3.5 5.5 7.4 7.4 7.8 5.9 3.3 3.3
19 3.4 3.5 3.4 3.4 3.6 5.5 7.1 7.1 8.0 5.8 3.4 3.2
20 3.4 3.4 3.4 3.4 3.6 5.8 7.1 6.9 7.8 5.6 3.5 3.3
21 3.4 3.4 3.5 3.5 3.6 5.9 7.3 7.4 7.7 5.5 3.4 3.2
22 3.4 3.4 3.5 3.4 3.6 5.9 6.8 6.9 8.0 5.3 3.2 3.2
23 3.4 3.4 3.5 3.4 3.6 5.9 7.3 7.3 7.7 5.2 3.2 3.3
24 3.4 3.4 3.4 3.5 3.6 6.2 7.4 7.3 7.3 5.1 3.1 3.3
25 3.4 3.4 3.4 3.5 3.6 5.9 7.3 7.4 7.5 4.9 3.3 3.2
26 3.4 3.4 3.4 3.5 3.9 5.9 7.1 7.1 7.4 4.8 3.3 3.2
27 3.4 3.4 3.4 3.5 4.1 6.0 7.0 7.4 7.3 4.7 3.1 3.2
28 3.4 3.4 3.4 3.5 4.1 6.0 7.1 7.2 7.1 4.6 3.3 3.2
29 3.4 3.4 3.4 3.5 4.3 6.0 6.9 7.4 6.8 4.6 3.3 3.2
30 3.4 --- 3.4 3.5 4.4 5.6 7.1 7.8 6.8 4.5 3.3 3.1
31 3.4 --- 3.4 --- 4.4 --- 7.0 8.0 --- 4.4 --- 3.2
Mean 3.4 3.4 3.4 3.4 3.7 5.5 7.0 7.2 7.7 5.8 3.7 3.2
Min 3.4 3.4 3.4 3.4 3.5 4.4 5.9 6.7 6.8 4.4 3.1 3.1
Max 3.5 3.5 3.5 3.5 4.4 6.9 7.8 8.0 8.4 6.7 4.3 3.4
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 June 2014
Appendix 2: Grant Creek Discharge Records
Appendix 2a. Grant Creek Discharge Records - 2013
Appendix 2b. Grant Historical Discharge Records – 1948-1958; 1982-1983; 2013
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 June 2014
Appendix 2a. Grant Creek Discharge Records – 2013
This appendix contains the following figures and tables:
Figure A.2a-1 Grant Creek- daily mean stage (feet), calendar year 2013.
Figure A.2a-2 Grant Creek- daily mean discharge (cfs), calendar year 2013.
Table A.2a-1 Grant Creek- daily mean discharge (cfs), calendar year 2013.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2a Page 1 June 2014
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
Jan‐1Feb‐1Mar‐1Apr‐1May‐1Jun‐1Jul‐1Aug‐1Sep‐1Oct‐1Nov‐1Dec‐1
GageHeight (ft)
Date
Grant Creek near Moose Pass, AK ‐Daily Mean Stage, CY 2013
Figure A.2a-1. Grant Creek – daily mean stage (feet), calendar year 2013.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2a Page 2 June 2014
0
200
400
600
800
1000
1200
Jan‐1Feb‐1Mar‐1Apr‐1May‐1Jun‐1Jul‐1Aug‐1Sep‐1Oct‐1Nov‐1Dec‐1Discharge (cfs)Date
Grant Creek near Moose Pass, AK ‐Daily Mean Discharge, CY 2013
Figure A.2a-2. Grant Creek – daily mean discharge (cfs), calendar year 2013.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2a Page 3 June 2014
Table A.2a-1. Grant Creek – daily mean discharge (cfs), calendar year 2013.
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 m m m m 28.1 565 616 459 348 m m m
2 m m m m 30.6 554 600 448 335 m m m
3 m m m 19.0 33.3 545 539 436 362 m m m
4 m m m 18.7 40.8 507 468 420 411 m m m
5 m m m 18.6 46.1 472 436 381 411 m m m
6 m m m 18.6 48.9 446 433 368 396 m m m
7 m m m 18.8 52.1 440 460 367 443 m m m
8 m m m 18.6 55.9 477 486 381 438 m m m
9 m m m 18.8 60.4 542 453 402 427 m m m
10 m m m 18.9 65.1 613 432 432 483 m m m
11 m m m 18.6 75.2 659 438 459 636 m m m
12 m m m 18.3 93.6 710 441 521 665 m m m
13 m m m 18.1 125 734 444 484 604 m m m
14 m m m 17.7 154 712 452 434 520 m m m
15 m m m 17.3 162 718 451 390 445 m m m
16 m m m 16.9 158 784 454 359 386 m m m
17 m m m 16.5 151 862 466 348 333 m m m
18 m m m 16.6 143 970 493 336 298 m m m
19 m m m 16.3 130 1005 521 319 264 m m m
20 m m m 16.8 130 960 526 317 230 m m m
21 m m m 16.8 123 894 514 313 211 m m m
22 m m m 17.0 119 797 483 320 200 m m m
23 m m m 18.9 119 706 468 319 185 m m m
24 m m m 20.8 135 646 464 317 171 m m m
25 m m m 21.9 167 636 459 301 185 m m m
26 m m m 23.2 203 641 463 276 219 m m m
27 m m m 23.9 240 660 459 253 234 m m m
28 m m m 24.1 340 670 461 251 m m m m
29 m --- m 25.7 404 636 467 335 m m m m
30 m --- m 26.7 499 617 470 391 m m m m
31 m --- m --- 566 --- 470 378 --- m --- m
Mean m m m 19.4 152 673 477 371 364 m m m
Min m m m 16.3 28.1 440 432 251 171 m m m
Max m m m 26.7 566 1005 616 521 665 m m m
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2a Page 4 June 2014
[This page intentionally left blank.]
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 June 2014
Appendix 2b. Grant Historical Discharge Records – 1948-1958; 1982-1983;
This appendix contains the following figures and tables:
Figure A.2b-1 Grant Creek – daily mean/min/max discharge (cfs), calendar years 1948-1958.
Table A.2b-1 Grant Creek – mean of daily mean discharge (cfs), calendar years 1948-1958.
Table A.2b-2 Grant Creek – minimum of daily mean discharge (cfs), calendar years 1948-1958.
Table A.2b-3 Grant Creek – maximum of daily mean discharge (cfs), calendar years 1948-1958.
Table A.2b-4 Grant Creek – daily mean discharge (cfs), water year 1981-1982.
Table A.2b-5 Grant Creek – daily mean discharge (cfs), water year 1982-1983.
Table A.2b-6 Grant Creek – daily mean discharge (cfs), water year 1983-1984.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2b Page 1 June 2014
0
500
1000
1500
2000
2500
Jan‐1Feb‐1Mar‐1Apr‐1May‐1Jun‐1Jul‐1Aug‐1Sep‐1Oct‐1Nov‐1Dec‐1Discharge (cfs)Date
Grant Creek Historical Flow Records‐Mean/Min/Max Daily Discharge, CY 1948‐1958
USGS 1948‐1958 Mean Daily Flow
USGS 1948‐1958 Min Daily Flow
USGS 1948‐1958 Max Daily Flow
Figure A.2b-1. Grant Creek – daily mean/min/max discharge (cfs), calendar years 1948-1958.
(data reproduced from USGS website:
http://waterdata.usgs.gov/ak/nwis/uv/?site_no=%2015246000&PARAmeter_cd=00065,00060)
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2b Page 2 June 2014
Table A.2b-1. Grant Creek – mean of daily mean discharge (cfs), calendar years 1948-1958.
(data reproduced from USGS website:
http://waterdata.usgs.gov/ak/nwis/uv/?site_no=%2015246000&PARAmeter_cd=00065,00060)
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 34.0 25.0 21.0 21.0 59.0 278 529 480 377 198 153 117
2 33.0 26.0 21.0 21.0 62.0 298 515 480 383 192 145 108
3 33.0 25.0 21.0 21.0 64.0 322 520 473 441 186 141 98.0
4 32.0 25.0 21.0 21.0 68.0 349 522 456 447 205 134 81.0
5 32.0 24.0 21.0 21.0 71.0 363 516 452 440 218 124 73.0
6 33.0 24.0 20.0 21.0 76.0 368 540 465 389 248 117 69.0
7 32.0 24.0 20.0 22.0 81.0 385 551 471 343 242 115 63.0
8 33.0 23.0 20.0 22.0 86.0 409 541 460 316 235 114 59.0
9 33.0 23.0 20.0 22.0 88.0 417 532 447 298 228 105 57.0
10 33.0 23.0 20.0 23.0 92 417 549 436 296 212 106 56.0
11 32.0 23.0 20.0 23.0 103 410 566 426 296 198 107 51.0
12 32.0 24.0 20.0 24.0 111 405 554 429 338 184 104 49.0
13 32.0 23.0 20.0 24.0 125 396 548 439 349 177 101 47.0
14 32.0 23.0 20.0 25.0 135 384 548 466 324 174 94.0 46.0
15 31.0 23.0 20.0 26.0 144 377 533 470 304 173 90.0 44.0
16 29.0 23.0 19.0 27.0 153 389 530 434 280 178 85.0 43.0
17 29.0 23.0 19.0 28.0 157 397 530 410 271 160 83.0 42.0
18 29.0 23.0 19.0 29.0 165 426 518 385 272 158 80.0 42.0
19 31.0 23.0 19.0 32.0 172 460 506 364 270 170 76.0 42.0
20 30.0 23.0 19.0 35.0 185 488 496 364 260 165 86.0 44.0
21 30.0 23.0 19.0 38.0 196 539 492 369 254 154 107 51.0
22 29.0 23.0 19.0 38.0 205 549 497 375 250 165 127 49.0
23 29.0 23.0 19.0 39.0 211 554 507 378 239 176 154 50.0
24 29.0 23.0 19.0 41.0 217 527 526 378 252 170 165 51.0
25 30.0 23.0 19.0 40.0 222 562 513 376 264 162 158 48.0
26 31.0 23.0 19.0 41.0 230 587 490 370 262 167 140 46.0
27 31.0 22.0 19.0 42.0 241 604 490 363 257 164 130 44.0
28 30.0 22.0 19.0 46.0 245 611 490 370 253 157 136 42.0
29 29.0 18.0 19.0 51.0 244 602 475 358 243 164 152 40.0
30 28.0 --- 19.0 55.0 246 571 459 336 233 160 134 39.0
31 28.0 --- 19.0 --- 259 --- 468 329 --- 156 --- 39.0
Mean 30.9 23.2 19.6 30.6 152 448 518 413 307 184 119 55.8
Min 28.0 18.0 19.0 21.0 59.0 278 459 329 233 154 76.0 39.0
Max 34.0 26.0 21.0 55.0 259 611 566 480 447 248 165 117.0
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2b Page 3 June 2014
Figure A.2b-2. Grant Creek – minimum of daily mean discharge (cfs), calendar years 1948-1958.
(data reproduced from USGS website:
http://waterdata.usgs.gov/ak/nwis/uv/?site_no=%2015246000&PARAmeter_cd=00065,00060)
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 18.0 13.0 13.0 14.0 17.0 112 380 327 173 94.0 44.0 21.0
2 19.0 12.0 13.0 14.0 18.0 112 380 327 160 91.0 45.0 21.0
3 20.0 11.0 13.0 14.0 19.0 114 376 327 152 88.0 44.0 21.0
4 20.0 12.0 13.0 13.0 20.0 117 411 327 152 87.0 43.0 21.0
5 19.0 13.0 13.0 14.0 20.0 122 395 305 160 84.0 42.0 21.0
6 17.0 13.0 13.0 14.0 20.0 127 363 288 166 79.0 41.0 21.0
7 16.0 12.0 13.0 14.0 19.0 135 341 291 178 75.0 39.0 21.0
8 16.0 11.0 13.0 13.0 19.0 156 334 320 174 71.0 36.0 21.0
9 17.0 11.0 13.0 13.0 18.0 176 352 352 169 69.0 35.0 21.0
10 18.0 11.0 13.0 14.0 19.0 200 383 334 160 69.0 34.0 21.0
11 17.0 12.0 13.0 14.0 20.0 218 393 316 156 70.0 33.0 21.0
12 16.0 13.0 13.0 14.0 20.0 251 382 320 152 69.0 33.0 21.0
13 15.0 14.0 13.0 14.0 21.0 240 365 320 160 67.0 35.0 21.0
14 15.0 14.0 13.0 14.0 23.0 240 368 274 158 66.0 28.0 21.0
15 14.0 13.0 13.0 14.0 25.0 230 358 260 156 64.0 28.0 21.0
16 14.0 12.0 13.0 15.0 27.0 240 393 230 151 65.0 28.0 21.0
17 13.0 11.0 12.0 15.0 30.0 257 419 210 145 60.0 28.0 21.0
18 12.0 11.0 12.0 15.0 38.0 230 403 200 139 53.0 28.0 21.0
19 13.0 11.0 13.0 15.0 58.0 230 383 200 138 53.0 28.0 21.0
20 13.0 11.0 13.0 15.0 74.0 230 341 208 132 53.0 28.0 21.0
21 13.0 11.0 14.0 15.0 90.0 230 316 218 125 53.0 28.0 21.0
22 13.0 12.0 14.0 15.0 90.0 230 305 233 120 53.0 28.0 21.0
23 13.0 13.0 14.0 15.0 90.0 230 285 246 117 51.0 28.0 21.0
24 14.0 13.0 14.0 15.0 92.0 290 272 240 104 49.0 28.0 21.0
25 13.0 14.0 14.0 15.0 95.0 287 275 230 104 49.0 28.0 21.0
26 12.0 14.0 14.0 15.0 100 299 291 230 91.0 48.0 28.0 20.0
27 13.0 14.0 14.0 15.0 111 322 295 240 78.0 52.0 28.0 19.0
28 13.0 14.0 14.0 15.0 117 332 285 230 65.0 51.0 28.0 18.0
29 12.0 17.0 14.0 15.0 117 367 291 210 71.0 49.0 28.0 18.0
30 13.0 --- 15.0 15.0 117 383 305 194 94.0 47.0 28.0 18.0
31 13.0 --- 15.0 --- 112 --- 316 180 --- 45.0 --- 18.0
Mean 15.0 12.5 13.4 14.4 53.4 224 347 264 137 63.7 32.7 20.5
Min 12.0 11.0 12.0 13.0 17.0 112 272 180 65.0 45.0 28.0 18.0
Max 20.0 17.0 15.0 15.0 117 383 419 352 178 94.0 45.0 21.0
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2b Page 4 June 2014
Table A.2b-3. Grant Creek – maximum of daily mean discharge (cfs), calendar years 1948-1958.
(data reproduced from USGS website:
http://waterdata.usgs.gov/ak/nwis/uv/?site_no=%2015246000&PARAmeter_cd=00065,00060)
Day Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 90.0 42.0 33.0 44.0 170 524 1210 657 768 420 338 500
2 83.0 42.0 33.0 48.0 177 575 989 831 810 467 327 480
3 76.0 42.0 33.0 49.0 182 657 885 933 1390 404 309 400
4 72.0 42.0 33.0 50.0 193 726 810 831 1500 560 285 250
5 70.0 42.0 33.0 50.0 201 768 747 675 1410 702 253 180
6 70.0 42.0 33.0 52.0 204 726 765 789 1000 708 225 160
7 64.0 42.0 33.0 55.0 207 699 780 726 712 740 247 130
8 64.0 42.0 33.0 59.0 207 726 705 633 564 657 300 110
9 64.0 42.0 33.0 60.0 201 733 665 580 530 528 300 110
10 64.0 42.0 33.0 62.0 190 761 877 555 530 537 328 110
11 64.0 42.0 33.0 65.0 177 719 1030 526 530 478 338 90.0
12 64.0 42.0 33.0 66.0 198 699 893 565 853 436 328 90.0
13 64.0 42.0 33.0 67.0 212 663 733 570 1020 363 303 90.0
14 64.0 42.0 33.0 69.0 243 597 719 761 817 356 273 90.0
15 64.0 42.0 33.0 68.0 264 585 754 810 621 331 263 90.0
16 47.0 48.0 28.0 68.0 313 625 761 616 488 400 241 90.0
17 47.0 48.0 28.0 67.0 320 609 719 560 480 372 213 90.0
18 47.0 48.0 28.0 67.0 383 665 675 545 480 352 193 90.0
19 58.0 48.0 28.0 66.0 369 705 663 555 480 423 175 90.0
20 56.0 48.0 28.0 90.0 399 750 621 645 480 411 180 90.0
21 53.0 48.0 28.0 110 411 965 657 599 505 427 397 186
22 51.0 48.0 28.0 120 387 941 712 510 480 520 500 178
23 49.0 48.0 28.0 120 359 925 740 540 480 448 545 186
24 47.0 48.0 28.0 120 345 1050 849 569 480 356 500 202
25 47.0 48.0 28.0 115 338 1510 785 640 480 295 540 196
26 58.0 46.0 28.0 110 390 1920 754 650 480 295 430 180
27 58.0 45.0 28.0 109 446 2090 754 600 520 299 350 161
28 52.0 44.0 28.0 126 460 2140 747 575 630 260 460 147
29 47.0 19.0 28.0 145 432 2010 705 520 550 306 700 135
30 47.0 --- 28.0 160 410 1610 663 480 480 302 600 122
31 47.0 --- 29.0 --- 439 --- 645 560 --- 309 --- 122
Mean 59.6 43.6 30.5 81.9 298 956 775 632 685 434 348 166
Min 47.0 19.0 28.0 44.0 170 524 621 480 480 260 175 90.0
Max 90.0 48.0 33.0 160 460 2140 1210 933 1500 740 700 500
Notes: m – missing data
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2b Page 5 June 2014
Table A.2b-4. Grant Creek – daily mean discharge (cfs), water year 1981-1982. (reproduced from
Ebasco 1984)
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2b Page 6 June 2014
Table A.2b-4 (continued). Grant Creek – daily mean discharge (cfs), water year 1981-1982. (reproduced
from Ebasco 1984)
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2b Page 7 June 2014
Table A.2b-5. Grant Creek – Daily Mean Discharge (cfs), Water Year 1982-1983. (reproduced from
Ebasco 1984)
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2b Page 8 June 2014
Table A.2b-5 (continued). Grant Creek – daily mean discharge (cfs), water year 1982-1983.
(reproduced from Ebasco 1984)
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2b Page 9 June 2014
Table A.2b-6. Grant Creek – daily mean discharge (cfs), water year 1983-1984. (reproduced from
Ebasco 1984)
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 2b Page 10 June 2014
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FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 June 2014
Appendix 3: Grant Lake Dissolved Oxygen Profiles
This appendix contains the following figures and tables:
Figure A.3-1 Grant Lake dissolved oxygen profile (mg/L), 2013.
Figure A.3-2 Grant Lake dissolved oxygen profile (% saturation), 2013.
Table A.3-1 Grant Lake dissolved oxygen profiles (mg/L), 1981-1982.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 3 Page 1 June 2014
0
2
4
6
8
10
12
14
16
18
20
0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0
Depth (m)Dissolved Oxygen (mg/L)
Grant Lake ‐Instantaneous Dissolved Oxygen Profiles, August 2013
GLTS
GLOUT
Figure A.3-1. Grant Lake – dissolved oxygen profiles (mg/L), 2013.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 3 Page 2 June 2014
0
2
4
6
8
10
12
14
16
18
20
80.0 85.0 90.0 95.0 100.0 105.0
Depth (m)Dissolved Oxygen (% Saturation)
Grant Lake ‐Instantaneous Dissolved Oxygen Profiles, August 2013
GLTS
GLOUT
Figure A.3-2. Grant Lake – Dissolved oxygen profiles (% saturation), 2013.
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 3 Page 3 June 2014
Table A.3-1. Grant Lake – dissolved oxygen profiles (mg/L), 1981-1982. (reproduced from Ebasco
1984)
FINAL REPORT WATER RESOURCES STUDY – WQ, TEMP, AND HYDROLOGY
Grant Lake Hydroelectric Project Kenai Hydro, LLC
FERC No. 13212 Appendix 3 Page 4 June 2014
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