HomeMy WebLinkAboutReconn Level Feasibility Study Walker Lake Hydro Project Near Klukwan, Alaska 2-1988.TABLE OF CONTENTS
SUMMARY AND CONCLUSIONS . . . . . . . . . . . . . . . • . . 1
INTRODUCTION
PROJECT DESCRIPTION . . . .
Alternative 1 -
Alternative 2
Alternative 3
Walker Creek Diversion • . • . . .
Walker Lake Dam • • • . . . . . . . .
Walker Lake Dam with Little
Salmon River Diversion . . . . . . . .
Power Loads and Power Costs
POWER GENERATION . • • .
Hydrology . . . . . .
Power Generation and Use .
PROJECT COSTS . . . .
PROJECT FEASIBILITY
Other Issues •
APPENDIX A Field Trip Report
APPENDIX B Cost Breakdowns
3
4
4
5
6
7
9
9
9
11
12
12
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SUMMARY AND CONCLUSIONS
KLUKWAN HYDROPOWER
FEASIBILITY REPORT
Three alternative project configurations were considered for each
of two options: A. service to Klukwan only, and B. service to
Klukwan and Haines. The three alternatives are:
o Diversion from Walker Creek
o Dam and Diversion from Walker Lake
o Dam and Diversion from Walker Lake with Diversion from
Little Salmon River into Walker Lake.
Cost and power generation analyses were performed on all
alternatives under both options. Capital costs were converted to
annual costs and added to the estimated Operation and Maintenance
(O&M) costs. 'I'~1e average annual generation was also computed for
each alternative and option. These values were divided into their
respective annual costs to obtain project costs per kilowatt hour.
All alternatives serving electricity to Klukwan only (Option A)
were infeasible. Alternatives 1, 2, and 3 serving Haines and
Klukwan (Option B) had costs of $0.27, $0.30 and $.20/kwhr,
respectively, which are close to the price of diesel-generated
energy in Klukwan ($0.22/kwhr) and Haines ($0.17/kwhr).
Alternative 3, Option B, appears to be marginally feasible,
especially if escalation of energy costs are taken into account.
In addition, residents between Klukwan and Haines who are without
power would receive electric service for the first time.
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The major areas of uncertainty in this reconnaissance level
feasibility are listed below:
o Lack of flow data.
0 Added benefit from storage at Walker Lake. This would
require a small operations study.
o Lack of actual loads and load curves at Haines and
Klukwan.
o Whether a dam at the southeast end of Walker Lake is
necessary.
o Soils data at powerhouse, dams, and pipeline routes ..
These items should be concentrated on during any further study of
the project's feasibility. Further study would be appropriate to
refine the project configuration, cost estimate, and explore the
market for energy in Haines.
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INTRODUCTION
The purpose of this study is to provide a reconnaissance level
economic feasibility study for the Walker Lake Hydropower Project.
This study is based on one site visit, which took place on
November 20, 1987 and was limited in scope due to weather
conditions. See Appendix A. Other data used in the report
consisted of data from previous studies and hydrology supplied by
the Alaska Department of Natural Resources. The cost estimates
relied heavily on previous projects recently completed in
southeast Alaska. This report does not evaluate the financial
feasibility of the project, nor does it investigate the
feasibility of alternatives for providing the necessary
infrastructure for operating a plant.
This report was completed by Ott Water Engineers, Inc. (OTT) under
a subcontract with FryerjPressley Engineering, Inc. who are under
an open-ended contract with the Alaska Power Authority.
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PROJECT DESCRIPTION
Three project alternatives were investigated and are listed below:
1. Walker Creek Diversion
2. Walker Lake Dam
3. Walker Lake Dam with Little Salmon River Diversion
Each project would have different costs and energy generating
capabilities. The three alternatives were evaluated under. the
following load options:
A. Supply the load at Klukwan only.
B. Supply Klukwan 1 plus sell extra power to Haines.
The loads supplied under each of these options are explained in a
later section.
ALTERNATIVE 1 -WALKER CREEK DIVERSION
The pertinent characteristics of this alternative are shown on
Table 1. This alternative would consist of a diversion structure
located about 3 1 000 feet downstream of the outlet to Walker Lake
at an approximate elevation of 1150 feet MSL. See Figure 1. The
diversion would consist of a gravity dam about 8-feet high and
100-feet long 1 constructed of cyclopian concrete (large rocks and
concrete)1 and would contain a 36-inch sluice gate near the
intake. The intake would have a trashrack only. No provisions
have been incorporated in any of the alternatives for fish
screening. From the intake, a low-pressure pipeline would run
along the side of the hill to maintain a small pressure in the
pipe. This pipe would transition to the penstock which would run
down hill to the powerhouse.
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TABU: 1
AIJl'ERNM'IVE 1 ALTERNATIVE 2
WALKER CREEK WALKER lAKE
DIVERSION DAM
OPI'ION A OPI'ION B OPI'ION A OPI'ION B
capacity (kw) 270 1000 250 920
Gross Head (feet) 750 750 780 780
Maximum Flow ( cfs) 5.6 19.9 5.0 17.8
Diversion/Intake 1 1 2** 2**
IoN Pressure Pipeline
Diameter (inches) 14 24 14 24
Length (feet) 7020 7020 9660 9660
Penstock
Diameter (inches) 14 24 14 24
Length (feet) 2150 2150 2150 2150
Powerhouse Size (feet) 16 X 32 26 X 38 16 X 32 26 X 38
Roads
New (miles) 0.7 0.7 1.7 1.7
Rehabilitated (miles)* 3.1 3.1 3.1 3.1
(6.0) (6.0) (6.0) (6.0)
Transmission Line
Length (miles) 7.9 19.9 7.9 19.9
Voltage (kv) 34.5 34.5 34.5 34.5
* 3.1 miles of najor rehabilitation of logging roads.
6. 0 miles of minor rehabilitation.
ALTERNATIVE 3
WALKER lAKE DAM
WITH LITl'LE SAIMJN
DIVERSION
OPI'ION A OPI'ION B
1900
780
36.7
3**
30
15470***
30
2150
30 X 44
2.5
3.1
(6.0)
19.9
34.5
** 2 dams at Walker lake. One of hl"lich contains an intake structure.
*** Includes 5810 feet of 18-inch pipe from Little Salmon River Diversion to Walker
lake.
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I
I _I
I I
I I
I I
I I
i I I ~~
I I
I
EXISTING
ROAD
LOGGING ROAD
NEW
-7-TRANSMISSION LINE
PIPELINE, ALL AL T
PIPELINE, AL T 2 &3
PIPELINE, ALT 3
NEW ROADWAY (EACH AL T NOTED)
SCALE I"= 63,360
FIGURE 1
WALKER LAKE HYDROPOWER PROJECT
SITE PLAN OF ALTERNATIVES
DATE FEBRUARY1988
JOBNUMBER A113201
The powerhouse would be located at an approximate elevation of 400
feet MSL on the left bank of the Little Salmon River just upstream
of the present bridge (see Figure 1). The powerhouse site
contains enough level area for a powerhouse and switchyard. The
powerhouse foundation might need crushed rock fill as it appears
the drainage in this area is relatively poor. The powerhouse
would consist of a concrete foundation which would incorporate a
tailrace channel and support a prefabricated metal building. Its
size for Options A and B would be 512 and 988 square feet,
respectively. The powerhouse would contain the main control board
and supervisory equipment, turbine, generator, and overhead
travelling crane. It would also contain provisions for remote
control from Klukwan or Haines.
The road from the Klehini River Bridge to the powerhouse would
require upgrading. Major upgrade would be required of the logging
road which extends from the Klehini River Road to a point near the
planned diversion site. See Figure 1. About .7 miles of new road
would be required from the end of the logging road to the
diversion site.
Under Option A, the transmission line would run from the
powerhouse site to Klukwan, a distance of about 7. 9 miles, as
shown on Figure 1. Under Option B, an additional 12 miles of
transmission line would be required from Klukwan to Haines. A new
substation would also be required in Klukwan to accept the power.
ALTERNATIVE 2 -WALKER LAKE DAM
This alternative involves providing two small dams on Walker Lake
to provide extra storage for powerplant operation. Storage would
be required to meet peak loads, especially in the winter time.
Under Alternative 1, there will be periods during which the power
generation of the hydro unit would have to be supplemented by
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standby diesel power. This alternative would eliminate or reduce
the need for supplemental diesel power.
The two dams would be located at the outlet of the lake and at the
extreme southeast tip of Walker Lake. The need for the second dam
and its required height remains to be determined since the site
could not be visited during the field trip. The intake structure
would be located at the southeast end of the lake as shown on
Figure 1.
The low-pressure pipeline would have a diameter of 14-inches under
Option A and 24-inches under Option B. It would run from the
intake structure at the southeast tip of the lake to a point
adjacent to the Alternative 1 diversion. At this point, it would
follow the Alternative 1 pipeline alignment. Both the penstock
and the powerhouse would be located in the same area as described
for Alternative 1. The powerhouse size would be the same as
Alternative 1.
The road rehabilitation would be the same as Alternative 1, with
the exception of the requirement for 1 mile of additional road to
access the two dam sites and intake structure. The length of the
transmission line would also remain the same as Alternative 1.
ALTERNATIVE 3 -WALKER LAKE DAM WITH LITTLE SALMON RIVER DIVERSION
The layout for Alternative 3 project is shown on Figure 1, and the
project characteristics are given in Table 1. Alternative 3 is
the same as Alternative 2 with the addition of a diversion and
intake structure at an elevation of approximately 1250 feet mean
sea level on the Little Salmon River. The diversion structure was
assumed to be of the same size and construction as the diversion
described in Alternative 1. An 18-inch pipeline would carry water
from the Little Salmon River to Walker Lake, and would be buried
in the access road for most of its length. The remainder of the
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project would be the same as Alternative 2 with the exception of a
larger diameter low-pressure pipe and penstock to carry the
greater flow from Walker Lake to the powerhouse. This alternative
would double the powerplant capacity over that of Alternative 2.
An additional 0.8 miles of road and a bridge would be required to
access the Little Salmon River diversion.
Option A of Alternative 3 was not analyzed because the additional
cost would not justify the very small increment of energy to serve
Klukwan only. Alternative 3 would only be attractive if it could
supply power to a larger load (i.e., Haines).
POWER LOADS AND POWER COSTS
The Alaska Power Authority (APA) in their June 1987 Klukwan
Feasibility Report, estimated an average of 750 kwh per month, per
consumer would be realized. This would result in an
monthly demand of 50,330 kwh per month in the Year 2002.
equivalent to 603,960 kwh in a year.
average
This is
This demand was spread over 12 months using an allocation curve
found in the report by Raj Bhargava and Associates (April 1985).
This load curve is based on a residential energy load curve
developed for Hoonah, Alaska and is shown in the table below:
January 9.5%
February 8.1%
March 8.5%
April 7.6%
May 6.9%
June 8.4%
July 7.5%
August 8.2%
September 7.9%
October 8.6%
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November
December
8.0%
10.8%
The above figures were used in evaluating the feasibility of each
alternative.
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POWER GENERATION
The amount of energy generated in each alternative was computed
from flow duration curves for Walker Creek, project
characteristics (shown on Table 1), and the energy demand data
explained above.
HYDROLOGY
The flow duration curves for the three alternatives were developed
from flow measurements taken at a stream gage in Walker Creek near
the lake outlet. The flow duration curve at this gage was
computed by Alaska Department of Natural Resources based on flow
records from part of 1985, most of 1986, and part of 1987. See
Figure 2. The curves for Alternatives 1 and 3 were developed by
multiplying the curve at the gage by the ratio of the drainage
areas. Because of this short period of hydrologic record, the
analysis of the average annual power generation should be
considered to be only approximate. Only part of a year's data on
the Little Salmon River was available. Therefore, this data was
not used.
POWER GENERATION AND USE
The amount of energy which could be generated based on these flow
duration curves was computed as follows. The flow duration curve
was divided into a number of vertical sections. The average flow
in each section was multiplied times the net head and turbine
efficiency based on a standard 3-jet impulse turbine efficiency
curve. The net head was derived from the powerhouse and diversion
elevations from USGS quadrangle sheets and pipe head loss
calculations. The fraction of the year represented in each
section of the divided flow duration curve was then multiplied by
the average power generated. This gave the energy generated in
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,· -en u.
{)
70~--------~------~~-------r--------~------~
\
:\ !
\\ I
I
I ·.,
~ .\
\\
~ so----1
\
I
\ 40+-----~~-----'.1 i
!
LITTLE SALMON AND WALKER LAKE
(AWTERNATIVE 3~
\ 3: .\
g 304-----~~~'-H---------~------~--~----+-------~
u. \\ -WALKER CREEK DIVERSION
\.:, rL TE~NA TIV9 1)
\', I \ /I FLOW AT WALKER LAKE GAGE
20 -+-------~,~~'---\/_.__ ~ v -t-T-ERNA1iVE~)
·., I
\\/ 10-f--+'·~~.~-~~---+--1 -+---.-1
,-_-I . -...
---L ":"':...::_-: :-:...:::... ::-:.±:.:-- -c-=-:-------1 ··-· ==-==-r-=-"""':". ==---;.-=-==
04---------~------~--~----~,,--------+-,----~~
0 20 40 60 80 100
PERCENT EXCEEDANCE
FIGURE 2
WALKER LAKE HYDROPOWER PROJECT
FLOW DURATION CURVES
JOB NUMBER :A 113 2.01
DATE: FEBRUARY 1988
each section of the flow duration curve which was then summed to
produce the average annual energy.
The average annual energy was then distributed to each month over
the year based on the average monthly flows. This produced an
average monthly power generation available which was compared with
a load for each month. For all alternatives, the average monthly
power generation equalled or exceeded the average monthly load.
However, there may be times when peak daily and hourly demand will
exceed the capacity of the unit and the backup diesel generators
would have to be used for Alternative 1, Option A. Even though
the plant capacity for Alternative 2 is less than Alternative 1,
more energy would be generated in Alternative 2 since the peak
demand could be met by using stored water in Walker Lake. Under
Option B, the total amount of energy generated by the plant was
assumed to be used by Klukwan and Haines. Table 2 shows the
average annual energy produced by each of the alternatives and
their options.
TABLE 2
AVERAGE ANNUAL ENERGY GENERATED
AVERAGE ANNUAL
OPTION ENERGY (MWH)
Alternative 1 A 574
B 2875
Alternative 2 A 605
B 2673
Alternative 3 A N/A
B 5429
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PROJECT COSTS
The project cost estimates were based on the project
characteristics outlined in Table 1 and on the quantities of
concrete and excavation required for similar projects. Estimates
in southeast Alaska also reflect unit costs for a project under
construction and for another hydropower feasibility performed by
OTT. Both projects are in southeast Alaska. Specific cost data
and quantities are presented in Appendix B.
The following general assumptions were made in computing the
project costs:
0 Concrete, crushed rock, and riprap are available in
Haines.
o The low-pressure pipeline could be buried in standard
soil (i.e., ·no rock excavation required) .
o Temporary access roads would be constructed to install
the above-ground penstock.
o No costs would be incurred for land rights for the
project or the transmission lines.
Table 3 shows the estimated cost of each project alternative and
option, including engineering costs.
Annual operation and maintenance costs are based on OTT's past
experience on similar projects. Project capital costs were
converted to annual costs using a discount rate of 8 percent and a
project life of 30 years. These annual costs were added to the
O&M costs to produce total annual costs. Table 3 shows · the
estimated capital, O&M, and total annual costs.
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TABLE 3
ALTERNATIVE COSTS
ANNUAL TOTAL
COST O&M COSTS ANNUAL COSTS
OPTION ($1000) ($1000) ($1000)
Alternative 1 A 4005 70 426
B 7425 110 770
Alternative 2 A 4579 70 477
B 7622 125 802
Alternative 3 A N/A N/A N/A
B 10779 150 1107
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PROJECT FEASIBILITY
The total estimated annual costs in Table 3 for each alternative
were divided by the average annual energy generated shown in
Table 2. Results are shown in Table 4. The costs per kilowatt
hour are compared to the cost of alterative energy sources such as
diesel. According to Alaska Power Authority (1987), the cost of
diesel generation in Klukwan would be $0.22/kwhr and in Haines is
$0.17/kwhr. From Table 4, diesel generation would be preferred to
Alternatives 1A and 2A.
If the escalation of energy and O&M costs were considered, then
Alternative 3B is marginally feasible at $0.20/kwhr. This
analysis also assumes that the total energy generated by
Alternative 3B could be used in the KlukwanjHaines area.
OTHER ISSUES
This study addresses only the economic feasibility which
determines whether the project will be able to pay for itself over
its lifetime. It does not address the financial feasibility which
determines whether funds for the project are available. The
financial feasibility for this project would need to be determined
at a later date.
The Tlingit-Haida Regional Electric Authority (Haines Light and
Power Company) would need to be contacted about the possibility of
selling the project power in Haines.
References
Alaska Power Authority, "Draft Klukwan Feasibility Report", June
1987.
Raj Bhargava Associates, Rural Energy Construction Program, 1984-
1985, 42 Villages Waste Head Recovery Evaluation and Analysis
for Conservation", April 1985.
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TABLE 4
ANNUAL COSTS PER KILOWATT-HOUR
AVERAGE COSTS
OPTION PER KILOWATT HOUR
Alternative 1 A $0.74
B $0.27
Alternative 2 A $0.79
B $0.30
Alternative 3 A N/A
B $0.20
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WALKER LAKE HYDRO
FIELD OBSERVATION REPORT
All32.01
o Temperature: 30• F
o Snowing, about 1 to 2 feet of snow on the ground at the
powerhouse site
November 19, 1987, 10:30 am
In the area just upstream of the bridge I took several pictures of
the powerhouse site along the Little Salmon River. In the area
just above the left overbank is the location of the powerhouse.
There are cottonwoods and alders along the left overbank which
varies from about 20 to about 60 feet in width. The powerhouse
would be located in the flat area above the flood plain on the
left bank. There are some large cottonwood trees in this area up
to three to four feet in diameter. This site could be marshy in
the spring and summer months. It is a level area which forms a
triangle. Two sides of the triangle are formed by the Little
Salmon River and the base of the hill to the Northwest. The other
side of the triangle is along the road which crosses the Little
Salmon River. Foundations could be a problem due to the possible
swampy nature of this area. There are no fir trees growing in
this area only alders and cottonwoods.
I've taken several pictures from the bridge looking to the east.
The bridge is a high point. The road drops about 6 to 8 vertical
feet to a low point where a small stream passes under the road
through a culvert. This stream probably drains the marshy area
that lies in the northeast corner of the triang1u1ar area.
Stan Carrick, from the Department of Natural Resources said that
he thinks the powerhouse site consists of alluvium rather than
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marshy material. If the alluvium is several feet thick it
probably would not be a problem for the powerhouse foundation.
This is being dictated from the top of the road at the low point
mentioned above. There is definitely a creek running through this
area. There seems to be two channels coming together at a point
just upstream of the road. One comes from north of the road
entering perpendicular to the road and the other comes from a
point east-northeast of the road. Both seem to be draining this
flat area.
The hill above the powerhouse site does not seen to be
particularly steep. From the road the slope appears to have from
50 to 80 percent slopes. The hill is heavily forested. I can't
see any evidence of slides where the penstock would be coming down
the hill. There seems to be some bare spots on the slope near the
River although, it is difficult to tell through the falling snow.
After taking off from the bridge site we flew up the Little Salmon
River and then up Walker Creek to Walker Lake. The visibility was
about a 1/4 of a mile and it was snowing rather heavily. Since
the weather might close in at any time, the pilot did not want
land and let us inspect the site or maintain the stream gage at
the lake. I was not able to inspect the dam sites at the creek's
exit from the lake or at the southeast end of the lake.
As we flew back down the Little Salmon River, I was able to see
the penstock route. It appears that the dam would be very easy to
construct. The first portion of the low-pressure pipeline route
is along a relatively flat portion on top of a ridge. However,
the furthest downstream third of the low pressure pipeline appears
to get into steeper terrain as it arrives at the end of the ridge
near where the penstock starts. The penstock would run straight
down the hill.
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The Little Salmon River is in a canyon from the bridge to upstream
past where the project is located. The only exception to this is
in a short area around the confluence with Walker Creek. It
appeared from the helicopter that the diversion location on the
Little Salmon River is in a steep canyon. Getting the pipeline
out for this canyon and building the diversion dam could be
difficult and expensive.
Ott Yater Engineers,Inc. Alaska Power Authority
Alaska Power Authority
WALKER LAKE PROJECT
SUMMARY OF DETAILED COST ESTIMATE (1988 Dollars)
***** (ALTERNATIVE 1, OPTION A:)
FERC
A/C No. Description Amount($)
330 Land and Land Rights 0
330.5 Mobilization and Logistics 122,000
331 Structures and Improvements 161,590
332 Reservoirs, Dams and Waterways 1,132,212
333 Turbines and Generators 220,000
334 Accessory Electrical Equipment 85,000
335 Misc. Mechanical Equipment 16,000
336 Roads, Railroads and Bridges 440,500
350 Land and Land Rights 0
352 Transmission Struct . and Improv. n/a
353 Substation·Equipment 48,000
355 Poles and Fixtures 232,600
356 Overhead Conductors and Devices 209,000
359 Line Clearing, Mob, and Demob. 60,000
SUBTOTAL, ESTIMATED COSTS 2,726,902
Contingency Allowance * 25.0% 681 J 725
TOTAL ESTIMATED DIRECT COST 3,408,627
Engineering and Administration* 17.5% 596,510
TOTAL CONSTRUCTION COST $4,005,137
*Covering environmental studies and licensing (5%), design
and specification (6%), legal and financial fees (1.5%) and
construction management (5%).
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10-Feb-88
Ott Water Engineers,Inc. Alaska Power Authority
FERC
A/C No.
WALKER LAKE PROJECT
ALTERNATIVE NO. lA
DETAILED COST ESTIMATE (1988 Dollars)
Description Quan-
tity
Unit Unit
Price
330 LAND AND LAND RIGHTS
.01 Land Rights -Generation Plant 0 L.S. $0
Subtotal -A/C No. 330 -Land and Land Rights
' 330 .5 MOBILIZATION AND LOGISTICS
.51 Temp Const Roads for Penstock 1.00 Mile $50,000
.52 Open Storage and Helipads 1 L.S. $8,000
.53 Covered Storage & Office 1 L.S. $7,000
.54 Construction Power 1 L.S. $6,000
.55 Temporary Water System 1 L.S . $3,000
. 56 Construction Surveys 1 L.S. $24,000
.57 Subsistence 400 Days $60
Subtotal -A/C No. 330.5 -Mobilization and Logistics
331 STRUCTURES AND IMPROVEMENTS
331 .1 POWERHOUSE
.11 Clearing 1.00 Acre $5,000
.12 Excavation 160 C.Y. $25
.13 Concrete (including reinforcing) 85 C.Y. $650
.14 Misc. Metals 1,500 Lb. $3.00
.15 Partition Walls 1 L.S. $3,000
.16 Furnishings and Fixtures 1 L.S. $2,000
.17 Pre-eng'd Metal Superstructure 512 S.F. $45.00
.18 HVAC and Plumbing l L.S. $12,000
.19 Grounding Grid 1 L.S. $12,000
Subtotal -Powerhouse
331 .2 POWERHOUSE SITE/SWITCHYARD
.21 Fill 100 C.Y. $10
. 22 Crushed Rock Surfacing 50 C.Y . $20
. 23 Drainage 1 L.S . $10,000
.24 Chain Link Fencing 150 L.F. $30
.25 16-foot Double Gate 1 Each $1,000
.26 Foundations 12 C.Y. $600
Subtotal -Powerhouse Site/Switchyard
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10-Feb-88
Amount($)
0
0
50,000
8,000
7,000
6,000
3,000
24,000
24,000
122,000
5,000
4,000
55,250
4,500
3,000
2,000
23,040
12,000
12,000
---------
120,790
------
1,000
1,000
10,000
4,500
1,000
7,200
----------..
24,700
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Ott Water Engineers,Inc. Alaska Power Authority
FERC
A/C No.
331 . 3
.31
.32
.33
.34
.35
332
332 .1
.11
.12
.13
.14
.15
.16
.17
.18
332 . 3
332 .31
. 311
.312
.313
. 314
.315
.316
. 317
.318
WALKER LAKE PROJECT
ALTERNATIVE NO. lA
DETAILED COST ESTIMATE (1988 Dollars)
Description Quan-Unit
tity
KLUKWAN SUBSTATION
Crushed Rock Surfacing 70 C.Y.
Drainage 1 L.S.
Chain Link Fencing 150 L.F.
16-foot Double Gate 1 Each
Foundations 12 C.Y.
Unit
Price
$20
$2,000
$30
$1,000
$600
Subtotal -Powerhouse Site/Switchyard
Subtotal -A/C No. 331 -Structures and Improvements
RESERVOIRS, DAMS AND WATERWAYS
DAJ.'i AND SPILLWAY ON WALKER CK
Diversion and care of Water 1 L.S. $20,000
Clearing 1.0 Acre $5,000
Common Excavation 150 C.Y. $15
Rip-Rap 357 C.Y. $35
Mass Concrete 176 C.Y. $400
Structural Concrete 20 C.Y. $650
Miscellaneous Metals 1,200 Lb. $4.00
Sluice Gate 1 L.S. 15000
Subtotal -Dam and Spillway
WATERWAYS
INTAKE AT WALKER CREEK
Bedding Material 12 C.Y. $25
Rip rap 25 C.Y. $15
Concrete (Including reinforcing) 20 C.Y. $650
Trashrack & Stru. Steel 1,800 Lb . $3.00
Steel Pipe, 14 inch diameter 70 L.F. $70.00
14-inch diameter Gate 1 L.S. $6,000
Hisc. Steel 600 Lb. $3
Revegetation and Erosion Control 0.4 Acre $2,500
Subtotal -Intake & u. Penstock
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10-Feb-88
Amount($)
1,400
2,000
4,500
1,000
7,200 ____ :.. ____ ..., __
16,100
-----------
161,590
-----------
20,000
5,000
2,250
12,507
70,400
13,000
4,800
15,000
-----------
142,957 _____ ,. ___ ... __
300
375
13,000
5,400
4,900
6,000
1,800
1,000
--------·---
32' 77 5
------------
-----------------Ott Water Engineers, Inc.---------------
Ott Water Engineers,Inc. Alaska Power Authority
FERC
A/C No.
332 .32
.321
.322
.323
.324
.325
332 .33
332 .331
.332
.333
.334
.335
.336
.337
.338
.339
332 .34
.341
.342
WALKER LAKE PROJECT
ALTERNATIVE NO. lA
DETAILED COST ESTIMATE (1988 Dollars)
Description Quan-Unit
tity
LOW PRESSURE PIPELINE (Walker Lk. to Top of Penstock)
Clearing 6.5 Acre
Trench Excavation and Backfill 7,020 L.F.
Bedding Material 1,700 C.Y.
Steel Pipe, 14 inch diameter 7,020 L.F.
Revegetation and Erosion Control 6.5 Acre
Subtotal -Intake & Upper Penstock
Penstock
Above-ground Penstock (2,150' long)
Clearing (40' wide) 2.0 Acre
Additional Tree Removal 1 L.S.
Excavation 30 C.Y.
Concrete in Anchor Blocks 60 C.Y.
Structural Steel 4,000 Lb.
Steel Penstock, 14 inch diameter 2,150 L.F.
Expansion Joints 6 Each
Revegetation and Erosion Control 2.0 Acre
Subtotal -Above-ground Penstock
Tailrace
Excavation 140 C.Y.
Rip-Rap 70 C.Y.
Subtotal -Tailrace
Subtotal -A/C No. 332 -Res., Dams and W'ways
333 TURBINES AND GENERATORS
.01
.02
.03
Furnish 360 HP Single-jet
impulse turbine, including inlet
valve, controls and governor
Furnish 270 kW generator
Install turbine-generators
1
1
1
Each
Each
L.S.
Unit
Price
$5,000
$15
$20
$70.00
$2,500
$8,000
$10,000
$25.00
$650
$3.00
$80.00
$3,000
$2,500
$20.00
$25.00
$100,000
$80,000
$40,000
Subtotal -A/C No. 333 -Turbines and Generators
-3 -
10-Feb-88
Amount($)
32,500
105,300
34,000
491,400
16,250
,... _______
679,450
------------
15,794
10,000
750
39,000
12,000
172 '000
18,000
4,936
------------
272,480 ___ ..., ____ --
2,800
1,750
------------
4,550
------------
1,132,212
-----------
100,000
80,000
40,000
220,000
...._ _______________ Ott Water Engineers, Inc. ----------------
Ott Water Engineers,Inc. Alaska Power Authority
WALKER LAKE PROJECT
ALTERNATIVE NO. lA
DETAILED COST ESTIMATE (1988 Dollars)
10-Feb-88
FERC
A/C No.
Description Quan-
tity
Unit Unit Amount($)
334 ACCESSORY ELECTRICAL EQUIPMENT
.01
.02
.03
Excitation, switchgear, station service,
controls and protective relays 1
Supervisory controls 1
Communication Equipment 1
L.S.
L.S.
L.S.
Price
$40,000
$25,000
$20,000
Subtotal -A/C No. 334 Accessory Elect. Equip.
335 MISCELLANEOUS MECHANICAL EQUIPMENT
.01 5-ton Overhead Crane
.02 Miscellaneous Equipment
1
1
Each
L.S.
$8,000
$8,000
Subtotal -A/C No. 335 -Misc. Mechanical Equipment
336 ROADS, RAILROADS AND BRIDGES
.01 Upgrade Existing Logging Road
.02 New Road to Dams
.03 Grade and surface exist. P.H. road
3.10
0.70
6.00
Mile
Mile
Mile
$50,000
$65,000
$40,000
Subtotal -A/C No. 336 -Roads, Railroads and Bridges
350 LAND ~ND LAND RIGHTS
. 01
353
353 .1
. 11
. 12
353 . 2
. 21
. 22
Land Rights -Transmission Facil. 0 L.S .
Subtotal -A/C No. 330 -Land and Land Rights
SUBSTATION EQUIPMENT AND STRUCTURES
SWITCHYARD
Transformer (4.16/34.5kV)
Switches, Breakers and Misc. Equip
Subtotal -
KLUKWAN SUBSTATION
Transformer (34.5kV/12.47kV)
Switches, Breakers and Misc. Equip
Subtotal -
1
1
L.S .
L.S .
Walker Lake Switchyard
1
1
L.S .
L.S .
Klawock Substation
Subtotal -A/C No. 353 -Substation Equipment
- 4 -
$0
$12,000
$12,000
$12,000
$12,000
40,000
25,000
20,000
. 85,000
8,000
8,000
16,000
155,000
45,500
240,000
440,500
0
0
12,000
12,000
24,000
12,000
12,000
24,000
48,000
""----------------Ott Water Engineers, Inc.----------------'
Ott Water Engineers,Inc. Alaska Power Authority
FERC
A/C No.
355
355 .1
.11
.12
.13
356
356 .1
.11
.12
.13
.14
359
. 01
.02
WALKER LAKE PROJECT
ALTERNATIVE NO. lA
DETAILED COST ESTIMATE (1988 Dollars)
Description
POLES AND FIXTURES
POWERHOUSE TO KLUKWAN, 34.5 kV
Poles
Guys, Anchors & other material
Installation
Subtotal -A/C No. 355
OVERHEAD CONDUCTORS AND DEVICES
POWERHOUSE TO KLUKWAN & HAINES,
Conductors
Insulators
Hardware and Miscellaneous
Installation
Subtotal -A/C No. 356
-
Quan-
tity
1
1
7.9
Unit
L.S.
L.S.
Mile
Poles and Fixtures
34.5 kV, 20 miles
1 L.S.
1 L.S.
1 L.S.
7.9 Mile
-Overhead conductors,
LINE CLEARING, MOBILIZE AND DEMOBILIZE
Mobilize and Demobilize 1 L.S .
Light Clearing 4 Acre
10-Feb-88
Unit Amount($)
Price
$32,000 32,000
$11 '000 11,000
$24,000 189,600
------------
232,600
-----------
$16,000 16,000
$24,000 24,000
$11,000 11,000
$20,000 158,000
------------
etc 209,000
------------
$40,000 40,000
$5,000 20,000
------------
Subtotal -. A/C No. 359 -Clearing, Mob, and Demob. 60,000
-5 -
..._ ________________ Ott Water Engineers, Inc. ---------------
Ott Water Engineers,Inc. Alaska Power Authority
Alaska Power Authority
WALKER LAKE PROJECT
SUMMARY OF DETAILED COST ESTIMATE (1988 Dollars)
***** (ALTERNATIVE 1, OPTION B:)
FERC
A/C No. Description Amount($)
330 Land and Land Rights 0
330 .5 Mobilization and Logistics 133.000
331 Structures and Improvements 241,760
332 Reservoirs, Dams and Waterways 1,910,841
333 Turbines and Generators 510,000
334 Accessory Electrical Equipment 240,000
335 Misc. Mechanical Equipment 23,000
336 Roads, Railroads and Bridges 505,500
350 Land and Land Rights 0
352 ~ransmission Struct. and Improv. n/a
353 Substation· Equipment 117,000
355 Poles and Fixtures 707,000
356 Overhead Conductors and Devices 607,000
359 Line Clearing, Mob, and Demob. 60,000
SUBTOTAL, ESTIMATED COSTS 5,055,101
Contingency Allowance * 25.0% 1,263,775
TOTAL ESTIMATED DIRECT COST 6,318,876
Engineering and Administration* 17.5% 1,105,803
TOTAL CONSTRUCTION COST $7,424,679
*Covering environmental studies and licensing (5%), design
and specification (6%), legal and financial fees (1 .5%) and
construction management (5%).
-1 -
10-Feb-88
Ott Water Engineers,Inc. Alaska Power Authority
WALKER LAKE PROJECT
ALTERNATIVE NO. lB
DETAILED COST ESTIMATE (1988 Dollars)
10-Feb-88
FERC Description Quan-Unit Unit Amount($)
A/C No. tity Price
330 LAND AND LAND RIGHTS
.01 Land Rights -Generation Plant 0 L.S. $0 0
Subtotal -A/C No. 330 -Land and Land Rights 0
330 .5 MOBILIZATION AND LOGISTICS
.51 Temp Const Roads for Penstock 1.00 Mile $50,000 50,000
.52 Open Storage and Helipads 1 L.S. $10,000 . 10,000
.53 Covered Storage & Office 1 L.S. $8,000 8,000
.54 Construction Power 1 L.S. $7,000 7,000
.55 Temporary Water System 1 L.S. $4,000 4,000
.56 Construction Surveys 1 L.S. $24,000 24,000
.57 Subsistence 500 Days $60 30,000
-·----------
Subtotal -A/C No. 330.5 -Mobilization and Logistics 133' 000 __ ... _________
331 STRUCTURES AND IMPROVEMENTS . 331 .1 POWERHOUSE
.11 Clearing 1.60 Acre $5,000 8,000
.12 Excavation 220 C.Y. $25 5,500
.13 Concrete (including reinforcing) 150 C.Y. $650 97,500
.14 Misc. Metals 1,500 Lb. $3.00 4,500
.15 Partition Walls 1 L.S. $3,000 3,000
.16 Furnishings and Fixtures 1 L.S. $2,000 2,000
.17 Pre-eng'd Metal Superstructure 988 S.F. $45.00 44,460
.18 HVAC and Plumbing 1 L.S. $12,000 12,000
.19 Grounding Grid 1 L.S. $12,000 12,000
------------
Subtotal -Powerhouse 188,960 ____ .,. _______
331 .2 POWERHOUSE SITE/SWITCHYARD
.21 Fill 160 C.Y. $10 1,600
.22 Crushed Rock Surfacing 80 C.Y. $20 1,600
. 23 Drainage 1 L.S . $10,000 10,000
.24 Chain Link Fencing 200 L.F. $30 6,000
.25 16-foot Double Gate 1 Each $1,000 1,000
. 26 Foundations 16 C.Y . $600 9,600 __________ ......
Subtotal -Powerhouse SitejSwitchyard 29,800 _________ .., __
---------------Ott Water Engineers, Inc. --------------_.
Ott Water Engineers,Inc. Alaska Power Authority
FERC
A/C No.
331 .3
.31
.32
.33
.34
.35
332
332 .1
.11
.12
.13
.14
.15
.16
.17
.18
332 . 3
332 .31
.311
.312
. 313
.314
.315
.316
. 317
.318
WALKER LAKE PROJECT
ALTERNATIVE NO. lB
DETAILED COST ESTIMATE (1988 Dollars)
Description Quan-Unit
tity
KLUKWAN SUBSTATION
Crushed Rock Surfacing 100 C.Y.
Drainage 1 L. S.
Chain Link Fencing 200 L.F.
16-foot Double Gate 1 Each
Foundations 20 C.Y.
Unit
Price
$20
$2,000
$30
$1,000
$600
Subtotal -Powerhouse SitejSwitchyard
Subtotal -A/C No. 331 -Structures and Improvements
RESERVOIRS, DAMS AND WATERWAYS
DAM AND SPILLWAY ON WALKER CK
Diversion and care of Water 1 L.S. $20,000
Clearing 1.0 Acre $5,000
Common Excavation 150 C.Y. $15
Rip-Rap 357 C.Y. $35
Hass Concrete 176 C.Y. $400
Structural Concrete 20 C.Y. $650
Miscellaneous Hetals 1,200 Lb. $4.00
Sluice Gate 1 L.S. 15000
Subtotal -Dam and Spillway
WATERWAYS
INTAKE AT WALKER CREEK
Bedding Haterial 20 C.Y. $25
Rip rap 25 C.Y. $15
Concrete (Including reinforcing) 30 C.Y. $650
Trashrack & Stru. Steel 3,000 Lb. $3.00
Steel Pipe, 24 inch diameter 70 L.F. $100.00
24-inch diameter Gate 1 L.S. $10,000
Misc. Steel 1,000 Lb . $3
Revegetation and Erosion Control 0.4 Acre $2,500
Subtotal -Intake & u. Penstock
10-Feb 88
Amount($)
2,000
2,000
6,000
1,000
12,000
--------
23,000
--------
241,760
----------
20,000
5,000
2,250
12,507
70,400
13.000
4,800
15,000
-----------
142,957
------------
500
375
19,500
9,000
7,000
10,000
3,000
1,000
------------
50,375
-----------
...._ ________________ Ott Water e..'riglneers, Inc.---------------
Ott Uater Engineers,Inc. Alaska Power Authority
FERC
A/C No.
332 .32
.321
.322
.323
.324
.325
332 .33
332 .331
.332
.333
.334
.335
. 336
.337
.338
.339
332 .34
. 341
. 342
WALKER LAKE PROJECT
ALTERNATIVE NO. lB
DETAILED COST ESTIMATE (1988 Dollars)
Description Quan-Unit
tity
LOW PRESSURE PIPELINE (Walker Lk. to Top of Penstock)
Clearing 8.9 Acre
Trench Excavation and Backfill 9,660 L.F.
Bedding Material 3,000 C.Y.
Steel Pipe, 24 inch diameter 9,660 L.F.
Revegetation and Erosion Control 8.9 Acre
Subtotal -Intake & Upper Penstock
Penstock
Above-ground Penstock (2,150' long)
Clearing (40' wide)
Additional Tree Removal
Excavation
Concrete in Anchor Blocks
Structural Steel
Steel Penstock, 24 inch diameter
Expansion Joints
Revegetation and Erosion Control
2.0 Acre
1 L.S.
40 C.Y.
100 C.Y.
8,000 Lb .
2,150 L.F.
6 Each
2.0 Acre
. Subtotal -Above-ground Penstock
Tailrace
Excavation
Rip-Rap
Subtotal -
240
110
Tailrace
C.Y .
C.Y .
Subtotal-A/C No. 332-Res., Dams and W'ways
333 TURBINES AND GENERATORS
.01
.02
.03
Furnish 1200 HP Multi-jet
impulse turbine, including inlet
valve, controls and governor
Furnish 1000 kW generator
Install turbine-generators
1
1
1
Each
Each
L.S.
Unit
Price
$5,000
$20
$20
$100.00
$2,500
$8,000
$10,000
$25.00
$650
$3.00
$130.00
$4,000
$2,500
$20.00
$25.00
$230,000
$200,000
$80,000
Subtotal -A/C No. 333 -Turbines and Generators
10-Feb-88
Amount($)
44,353
193,200
60,000
966,000
22,176
-----------
1,285,729
-----------
15,794
10,000
1,000
65,000
24,000
279,500
24,000
4,936
------------
424,230 _____ ..,. ______
4,800
2,750 ___ .., __ .,.. _____
7,550
--------·--
1,910,841
------------
230,000
200,000
80,000
510,000
'---------------Ott Water E~gineers, Inc.---------------
Ott Water Engineers,Inc. Alaska Power Authority
WALKER LAKE PROJECT
ALTERNATIVE NO. lB
DETAILED COST ESTIMATE (1988 Dollars)
10-Feb-88
FERC
A/C No.
Description Quan-
tity
Unit Unit Amount($)
334 ACCESSORY ELECTRICAL EQUIPMENT
.01
.02
.03
Excitation, switchgear, station service,
controls and protective relays 1
Supervisory controls 1
Communication Equipment 1
L.S.
L.S.
L.S.
Price
$140,000
$80,000
$20,000
Subtotal -A/C No. 334 Accessory Elect. Equip.
335 MISCELLANEOUS MECHANICAL EQUIPMENT
.01 5-ton Overhead Crane
.02 Miscellaneous Equipment
1
1
Each
L.S.
$15,000
$8,000
Subtotal -A/C No. 335 -Misc. Mechanical Equipment
336 ROADS, RAILROADS AND BRIDGES
.01 Upgrade Existing Logging Road
.02 New Road to Dams
.03 Grade and surface exist. P.H. road
3.10
1. 70
6.00
Mile
Mile
Mile
$50,000
$65,000
$40,000
Subtotal -A/C No. 336 -Roads, Railroads and Bridges
350 LAND AND LAND RIGHTS
. 01
353
353 .1
.11
. 12
353 . 2
. 21
.22
Land Rights -Transmission Facil. 0 L.S .
Subtotal -A/C No. 330 -Land and Land Rights
SUBSTATION EQUIPMENT AND STRUCTURES
SWITCHYARD
Transformer (4.16j34.5kV)
Switches, Breakers and Misc. Equip
1
1
L.S.
L.S .
Subtotal -Walker Lake Switchyard
KLUKWAN SUBSTATION
Transformer (34.5kV/12.47kV)
Switches, Breakers and Misc. Equip
Subtotal -
1
1
L.S .
L.S.
Klawock Substation
Subtotal -A/C No. 353 -Substation Equipment
$0
$30,000
$30,000
$27,000
$30,000
140,000
80,000
20,000
240,000
15,000
8,000
23,000
155,000
110,500
240,000
505,500
0
0
30,000
30,000
60,000
27,000
30,000
57,000
117,000
...._ ______________ Ott Water Engineers, Inc. ---------------
Ott Water Engineers,Inc. Alaska Power Authority
FERC
A/C No.
355
355 .1
.11
. 12
.13
356
356 .1
.11
.12
.13
.14
359
.01
.02
WALKER LAKE PROJECT
ALTERNATIVE NO. lB
DETAILED COST ESTIMATE (1988 Dollars)
Description
POLES AND FIXTURES
POWERHOUSE TO KLUKWAN & HAINES,
Poles
Guys, Anchors & other material
Installation
Subtotal -A/C No. 355
OVERHEAD CONDUCTORS AND DEVICES
POWERHOUSE TO KLUKWAN & HAINES,
Conductors
Insulators
Hardware and Miscellaneous
Installation
Subtotal -A/C No. 356
Quan-
tity
34.5 kV, 20
1
1
20
-Poles and
34.5 kV, 20
1
1
1
20
Unit
miles
L.S .
L.S.
Mile
Fixtures
miles
L.S.
L.S.
L.S.
Mile
-Overhead conductors,
LINE CLEARING, MOBILIZE AND DEMOBILIZE
Mobilize and Demobilize 1 L.S.
Light Clearing 4 Acre
10 Feb-88
Unit Amount($)
Price
$80,000 80,000
$27,000 27,000
$30,000 600,000 _______ ..., ____
707,000 _________ .,. __
$40,000 40,000
$60,000 60,000
$27,000 27,000
$24,000 480,000
------------
etc 607,000
------------
$40,000 40,000
$5,000 20,000
-----------
Subtotal -A/C No. 359 -Clearing, Mob, and Demob. 60,000
- 5 -...._ _______________ Ott Water Engineers, Inc.---------------
Ott Water Engineers,Inc. Alaska Power Authority
Alaska Power Authority
WALKER LAKE PROJECT
SUMMARY OF DETAILED COST ESTIMATE (1988 Dollars)
***** (ALTERNATIVE 2, OPTION A:)
FERC
A/C No. Description
330 Land and Land Rights
330.5 Mobilization and Logistics
331 Structures and Improvements
332 Reservoirs, Dams and Waterways
333 Turbines and Generators
334 Accessory Electrical Equipment
335 Misc. Mechanical Equipment
336 Roads, Railroads and Bridges
350 Land and Land Rights
352 Transmission Struct. and Improv.
353 Substation . Equipment
355 Poles and Fixtures
356 Overhead Conductors and Devices
359 Line Clearing, Mob, and Demob.
SUBTOTAL, ESTIMATED COSTS
Contingency Allowance * 25.0%
TOTAL ESTIMATED DIRECT COST
Engineering and Administration* 17.5%
TOTAL CONSTRUCTION COST
Amount($)
0
127,000
161,590
1,523,099
215,000
85,000
16,000
440,500
0
n/a
48,000
232,600
209,000
60,000
3,117,789
779,447
3,897,237
682,016
$4,579,253
*Covering environmental studies and licensing (5%), design
and specification (6%), legal and financial fees (1 .5%) and
construction management (5%).
- 6 -
10-Feb-88
Ott Water Engineers,Inc. Alaska Power Authority
WALKER LAKE PROJECT
ALTERNATIVE NO. 2A
DETAILED COST ESTIMATE (1988 Dollars)
10-Feb-88
FERC
A/C No.
Description Quan-
tity
Unit Unit Amount($)
Price
330 LAND AND LAND RIGHTS
.01
. 330 . 5
.51
.52
.53
.54
.55
.56
.57
331
331 .1
.11
.12
.13
. 14
. 15
. 16
.17
.18
. 19
331 .2
.21
.22
. 23
. 24
.25
. 26
Land Rights -Generation Plant 0 L.S.
Subtotal -A/C No. 330 -Land and Land Rights
MOBILIZATION AND LOGISTICS
Temp Const Roads for Penstock
Open Storage and Helipads
Covered Storage & Office
Construction Power
Temporary Water System
Construction Surveys
Subsistence
1.00
1
1
1
1
1
400
Mile
L.S.
L.S.
L.S.
L.S.
L.S.
Days
$0
$50,000
$10,000
$8,000
$7,000
$4,000
$24,000
$60
Subtotal -A/C No. 330.5 -Mobilization and Logistics
STRUCTURES AND IMPROVEMENTS
POWERHOUSE
Clearing
Excavation
Concrete (including reinforcing)
Misc. Metals
Partition Walls
Furnishings and Fixtures
Pre-eng'd Metal Superstructure
HVAC and Plumbing
Grounding Grid
Subtotal -
POWERHOUSE SITE/SWITCHYARD
Fill
Crushed Rock Surfacing
Drainage
Chain Link Fencing
16-foot Double Gate
Foundations
Subtotal -
1.00
160
85
1,500
1
1
512
1
1
Powerhouse
100
so
1
150
1
12
Acre
C.Y.
C.Y.
Lb .
L.S .
L.S .
S.F.
L.S.
L. S .
C.Y.
C.Y.
L.S .
L.F .
Each
C.Y .
$5,000
$25
$650
$3.00
$3,000
$2,000
$45.00
$12,000
$12,000
$10
$20
$10,000
$30
$1,000
$600
Powerhouse Site/Switchyard
-1 -
0
0
50,000
10,000
8,000
7,000
4,000
24,000
24,000
127,000
5,000
4,000
55,250
4,500
3,000
2,000
23,040
12,000
12,000
120,790
1,000
1,000
10,000
4,500
1,000
7,200
24,700
----------------Ott Water Engineers, Inc.-----------------
Ott Water Engineers,Inc. Alaska Power Authority
FERC
A/C
331
332
332
No.
. 3
.31
.32
.33
.34
.35
. 2
.21
.22
.23
.24
.25
.26
.27
. 28
.29
. 210
332 .3
332 . 31
. 311
. 312
. 313
. 314
. 315
.316
.317
.318
WALKER LAKE PROJECT
ALTERNATIVE NO. 2A
DETAILED COST ESTIMATE (1988 Dollars)
Description Quan-Unit
tity
KLUKWAN SUBSTATION
Crushed Rock Surfacing 70 C.Y.
Drainage 1 L.S.
Chain Link Fencing 150 L.F.
16-foot Double Gate 1 Each
Foundations 12 C.Y.
Unit
Price
$20
$2,000
$30
$1,000
$600
Subtotal -Powerhouse Site/Switchyard
Subtotal -A/C No. 331 -Structures and Improvements
RESERVOIRS, DAMS AND WATERWAYS
DAM AND SPILLWAY AT LAKE( 2 ROCKFILL DAMS)
Diversion and care of Water 1
Clearing 3.0
Common Excavation 1,156
Dumped Rockfill 1,896
Compacted Rockfill 1,200
Rip-Rap (incl. channel eros cntrl) 300
Concrete (Spillway) 66
Sluice Gates 2
Outlet Piping (3' Dia.) 250
Outlet Channel Exc. 5,867
L.S.
Acre
C.Y.
C.Y.
C.Y.
C.Y.
C.Y.
L.S .
L.F.
C.Y ..
Subtotal -Dam and Spillway
WATERWAYS
INTAKE AT WALKER LAKE
Bedding Material
Riprap
Concrete (Including reinforcing)
Trashrack & Stru. Steel
Steel Pipe, 14 inch diameter
14-inch diameter Gate
Misc. Steel
Revegetation and Erosion Control
12
25
20
1,800
70
1
600
0.4
C.Y .
C.Y .
C.Y .
Lb .
L.F .
L.S.
Lb.
Acre
Subtotal -Intake & U. Penstock
-2 -
$25,000
$5,000
$10
$15
$50
$35
$650
$15,000
$100
$5
$25
$15
$650
$3.00
$70.00
$6,000
$3
$2,500
10-Feb-88
Amount($)
1,400
2,000
4,500
1,000
7,200
-------... ---
16,100
161,590
------------
25,000
15,000
11,556
28,444
60,000
10,500
42 '611
30,000
25,000
29,333
277,444
300
375
13 '000
5,400
4,900
6,000
1,800
1,000
.32,775
"'----------------Ott Water Engineers, Inc.---------------
Ott Water Engineers,Inc. Alaska Power Authority
WALKER LAKE PROJECT
ALTERNATIVE NO. 2A
DETAILED COST ESTIMATE (1988 Dollars)
FERC Description Quan-Unit
A/C No. tity
332 .32 LOW PRESSURE PIPELINE (Walker Lk. to Top of Penstock)
.321 Clearing 8.9 Acre
.322 Trench Excavation and Backfill 9,660 L.F.
.323 Bedding Material 2,400 C.Y.
.324 Steel Pipe, 14 inch diameter 9,660 L.F.
.325 Revegetation and Erosion Control 8.9 Acre
Subtotal -Intake & Upper Penstock
332 .33 Penstock
332 .331 Above-ground Penstock (2,150' long)
.332 Clearing (40' wide)
.333 Additional Tree Removal
.334 Excavation
.335 Concrete in Anchor Blocks
.336 Structural Steel
.337 Steel Penstock, 14 inch diameter
.338 Expansion Joints
.339 Revegetation and Erosion Control
Subtotal -
332 .34 Tailrace
. 341 Excavation
. 342 Rip-Rap
Subtotal -
Subtotal -A/C No. 332
333 TURBINES AND GENERATORS
.01 Furnish 330 HP Single-jet
impulse turbine, including inlet
valve, controls and governor
.02 Furnish 250 kW generator
. 03 Install turbine-generators
2.0 Acre
1 L.S.
30 C.Y.
60 C.Y.
4,000 Lb.
2,150 L.F.
6 Each
2.0 Acre
Above-ground Penstock
140
70
Tailrace
-Res., Dams
1
1
1
C.Y .
C.Y .
and W'ways
Each
Each
L.S .
Unit
Price
$5,000
$15
$20
$70.00
$2,500
$8,000
$10,000
$25.00
$650
$3.00
$80.00
$3,000
$2,500
$20.00
$25.00
$100,000
$75,000
$40,000
Subtotal -A/C No. 333 -Turbines and Generators
- 3 -
10-Feb-88
Amount($)
44,500
144,900
48,000
676,200
22,250
-----------
935,850
-.... -------
15,794
10,000
750
39,000
12,000
172,000
18,000
4,936
...,. __________
272,480
------------
2,800
1,750
_.., __________
4, 550 __ ,... ______ .,. __
1,523,099
.,..,. _____ ----
100,000
75,000
40,000
215,000
"----------------Ott Water Engineers, Inc.---------------
Ott water Engineers,Inc. Alaska Power Authority
FERC
A/C No.
334
.01
.02
.03
335
.01
.02
336
.01
.02
.03
350
.01
353
353 .1
.11
.12
353 . 2
.21
.22
WALKER LAKE PROJECT
ALTERNATIVE NO. 2A
DETAILED COST ESTIMATE (1988 Dollars)
Description Quan-Unit
tity
ACCESSORY ELECTRICAL EQUIPMENT
Excitation, switchgear, station service,
controls and protective relays l L.S.
Supervisory controls 1 L.S.
Communication Equipment l L.S.
Unit
Price
$40,000
$25,000
$20,000
Subtotal -A/C No. 334 -Accessory Elect. Equip.
MISCELLANEOUS MECHANICAL EQUIPMENT
5-ton Overhead Crane 1 Each $8,000
Miscellaneous Equipment 1 L.S. $8,000
Subtotal -A/C No. 335 -Misc. Mechanical Equipment
ROADS, RAILROADS AND BRIDGES
Upgrade Existing Logging Road 3.10 Mile
New Road to Dams 0.70 Mile
Grade and surface ex:-ist. P.H. road 6.00 Mile
Subtotal -A/C No. 336 -
LAND AND LAND RIGHTS
Land Rights -Transmission Facil.
Subtotal -A/C No. 330 -
SUBSTATION EQUIPMENT AND STRUCTURES
SWITCHYARD
Transformer (4.16/34.5kV)
Switches, Breakers and Misc. Equip
Roads, Railroads and
Land
0
and
1
1
L.S.
Land Rights
L. s.
L.S.
$50,000
$65,000
$40,000
Bridges
$0
$12,000
$12,000
Subtotal -Walker Lake Switchyard
KLUKwAN SUBSTATION
Transformer (34.5kV/12.47kV)
Switches, Breakers and Misc. Equip
Subtotal -
1
1
L. s.
L.S.
Klawock Substation
Subtotal -A/C No. 353 -Substation Equipment
-4 -
$12,000
$12,000
10-Feb-88
Amount($)
40,000
25,000
20,000 ___ .,. ________
85,000
------------
8,000
8,000 ... .. __________
16,000
------------
155,000
45,500
240,000
------------
440,500
------
0
------------
0
..,. ___________
12,000
12,000
24,000
12,000
12,000
24,000
48,000
----------------Ott Water Engineers, Inc. -----------------
Ott Water Engineers,Inc. Alaska Power Authority
FERC
A/G No.
355
355 .1
.11
.12
.13
356
356 .1
.11
. 12
. 13
.14
359
. 01
.02
WALKER LAKE PROJECT
ALTERNATIVE NO. 2A
DETAILED COST ESTIMATE (1988 Dollars)
Description Quan-Unit Unit
tity Price
POLES AND FIXTURES
POWERHOUSE TO KLUKWAN, 34.5 kV
Poles 1 L.S. $32,000
Guys, Anchors & other material 1 L.S. $11,000
Installation 7.9 Mile $24,000
Subtotal -A/C No. 355 -Poles and Fixtures
OVERHEAD CONDUCTORS AND DEVICES
POWERHOUSE TO KLUKWAN, 34.5 kV
Conductors 1 L.S. $16,000
Insulators 1 L.S . $24,000
Hardware and Miscellaneous 1 L.S . $11 '000
Installation 7.9 Mile $20,000
Subtotal -A/C No. 356 -Overhead conductors, etc
LINE CLEARING, MOBILIZE AND DEMOBILIZE
Mobilize and Demobilize 1 L.S . $40,000
Light Clearing 4 Acre $5,000
Subtotal -A/C No. 359 -Clearing, Mob, and Demob.
- 5 -
10-Feb-88
Amount($)
32,000
11,000
189,600
-----------
232,600 ___ .., ________
16,000
24,000
11,000
158,000 _______ .,. ___
209,000
--------
40,000
20,000
------------
60,000
-----------
'----------------Ott Water Engineers, Inc.--------------_.
Ott Water Engineers,Inc. Alaska Power Authority
Alaska Power Authority
WALKER LAKE PROJECT
SUMMARY OF DETAILED COST ESTIMATE (1988 Dollars)
***** (ALTERNATIVE 2, OPTION B:)
FERC
A/C No. Description Amount($)
330 Land and Land Rights 0
330.5 Mobilization and Logistics 133,000
331 Structures and Improvements 241,760
332 Reservoirs, Dams and Waterways 2,045,328
333 Turbines and Generators 510,000
334 Accessory Electrical Equipment 240,000
335 Misc. Mechanical Equipment 23,000
336 Roads, Railroads and Bridges 505,500
350 Land and Land Rights 0
352 Transmission Struct. and Improv. n/a
353 Substation Equipment 117,000
355 Poles and Fixtures 707,000
356 Overhead Conductors and Devices 607,000
359 Line Clearing, Mob, and Demob. 60,000
SUBTOTAL, ESTIMATED COSTS 5,189,588
Contingency Allowance * 25.0% 1,297,397
TOTAL ESTIMATED DIRECT COST 6,486,985
Engineering and Administration* 17.5% 1,135,222
TOTAL CONSTRUCTION COST $7,622,208
*Covering environmental studies and licensing (5%), design
and specification (6%), legal and financial fees (1.5%) and
construction management (5%).
10-Feb-88
Ott Water Engineers,Inc. Alaska Power Authority
WALKER LAKE PROJECT
ALTERNATIVE NO. 2B
DETAILED COST ESTIMATE (1988 Dollars)
10-Feb-88
FERC
A/C No.
Description Quan-
tity
Unit Unit Amount($)
Price
330 LAND AND LAND RIGHTS
.01
. 330 . 5
.51
.52
.53
.54
.55
. 56
.57
331
331 .1
.11
.12
.13
. lt+
.15
.16
. 17
.18
. 19
331 .2
. 21
. 22
. 23
.24
.25
. 26
Land Rights -Generation Plant 0 L.S.
Subtotal -A/C No. 330 -Land and Land Rights
MOBILIZATION AND LOGISTICS
Temp Const Roads for Penstock
Open Storage and Helipads
Covered Storage & Office
Construction Power
Temporary Water System
Construction Surveys
Subsistence
1.00
1
1
1
1
1
500
Mile
L.S.
L.S.
L.S.
L.S .
L.S.
Days
$0
$50,000
$10,000
$8,000
$7,000
$4,000
$24,000
$60
Subtotal -A/C No. 330.5 -Mobilization and Logistics
STRUCTURES AND IMPROVEMENTS
POWERHOUSE
Clearing
Excavation
Concrete (including reinforcing)
Misc. Metals
Partition Walls
Furnishings and Fixtures
Pre-eng'd Metal Superstructure
HVAC and Plumbing
Grounding Grid
Subtotal -
POWERHOUSE SITE/SWITCHYARD
Fill
Crushed Rock Surfacing
Drainage
Chain Link Fencing
16-foot Double Gate
Foundations
Subtotal -
1.60
220
150
1,500
1
1
988
1
1
Powerhouse
160
80
1
200
1
16
Acre
C.Y.
C.Y.
Lb .
L.S.
L.S.
S.F .
L.S.
L.S .
C.Y .
C.Y .
L.S .
L.F.
Each
C.Y .
$5,000
$25
$650
$3.00
$3,000
$2,000
$45.00
$12,000
$12,000
$10
$20
$10,000
$30
$1,000
$600
Powerhouse Site/Switchyard
-1 -
0
0
50,000
10,000
8,000
7,000
4,000
24,000
30,000
133,000
8,000
5,500
97,500
4,500
3,000
2,000
44,460
12,000
12,000
188,960
1,600
1,600
10,000
6,000
1,000
9,600
29,800
----------------Ott Water Engineers, Inc. ---------------
Ott Water Engineers,Inc. Alaska Power Authority
FERC
A/C
331
332
332
No.
. 3
.31
.32
.33
.34
.35
.2
.21
.22
.23
.24
.25
.26
.27
.28
.29
.210
332 .3
332 .31
.311
. 312
. 313
. 314
. 315
.316
.317
.318
WALKER LAKE PROJECT
ALTERNATIVE NO. 2B
DETAILED COST ESTIMATE (1988 Dollars)
Description Quan-Unit
tity
KLUKWAN SUBSTATION
Crushed Rock Surfacing 100 C.Y.
Drainage 1 L.S.
Chain Link Fencing 200 L.F.
16-foot Double Gate 1 Each
Foundations 20 C.Y.
Unit
Price
$20
$2,000
$30
$1,000
$600
Subtotal -Powerhouse Site/Switchyard
Subtotal -A/C No. 331 -Structures and Improvements
RESERVOIRS, DAMS AND WATERWAYS
DAM AND SPILLWAY AT LAKE( 2 ROCKFILL DAMS)
Diversion and care of Water 1
Clearing 3.0
Common Excavation 1,156
Dumped Rockfill 1,896
Compacted Rockfill 1,200
Rip-Rap (incl. channel eros cntrl) 300
Concrete (Spillway)· 66
Sluice Gates 2
Outlet Piping (3' Dia.) 250
Outlet Channel Exc. 5,867
L.S.
Acre
C.Y.
C.Y.
C.Y.
C.Y.
C.Y.
L.S.
L.F.
C.Y.
Subtotal -Darn and Spillway
WATERWAYS
INTAKE AT WALKER LAKE
Bedding Haterial
Riprap
Concrete (Including reinforcing)
Trashrack & Stru. Steel
Steel Pipe, 24 inch diameter
24-inch diameter Gate
Hisc. Steel
Revegetation and Erosion Control
20
25
30
3,000
70
1
1,000
0.4
C.Y.
C.Y .
C.Y .
Lb.
L.F .
L.S.
Lb.
Acre
Subtotal -Intake & U. Penstock
$25,000
$5,000
$10
$15
$50
$35
$650
$15,000
$100
$5
$25
$15
$650
$3.00
$100.00
$10,000
$3
$2,500
10-Feb-88
Amount($)
2,000
2,000
6,000
1,000
12,000 ___________ ..
23,000
---------
241,760
------·-----
25,000
15,000
11,556
28,444
60,000
10,500
42 '611
30,000
25,000
29,333
277,444
500
375
19,500
9,000
7,000
10,000
3,000
1,000
50,375
Ott Water Engineers,Inc. Alaska Power Authority
WALKER LAKE PROJECT
ALTERNATIVE NO. 2B
DETAILED COST ESTIMATE (1988 Dollars)
FERC Description Quan-Unit
A/C No. tity
332 .32 LOW PRESSURE PIPELINE (Walker Lk. to Top of Penstock)
.321 Clearing 8.9 Acre
.322 Trench Excavation and Backfill 9,660 L.F.
.323 Bedding Material 3,000 C.Y.
.324 Steel Pipe, 24 inch diameter 9,660 L.F.
.325 Revegetation and Erosion Control 8.9 Acre
Subtotal -Intake &. Upper Penstock
332 .33 Penstock
332 .331 Above-ground Penstock (2,150' long)
.332 Clearing (40' wide)
.333 Additional Tree Removal
. 334 Excavation
. 335 Concrete in Anchor Blocks
.336 Structural Steel
.337 Steel Penstock, 24 inch diameter
.338 Expansion Joints .
.339 Revegetation and Erosion Control
Subtotal -
332 .34 Tailrace
.341 Excavation
. 342 Rip-Rap
Subtotal -
Subtotal -A/C No. 332
333 TURBINES AND GENERATORS
.01 Furnish 1200 HP Multi-jet
impulse turbine, including inlet
valve, controls and governor
.02 Furnish 920 kW generator
. 03 Install turbine-generators
2.0 Acre
1 L.S .
40 C.Y .
100 C.Y.
8,000 Lb.
2,150 L.F.
6 Each
2.0 Acre
Above-ground Penstock
240
llO
Tailrace
Res., Dams
1
1
1
C.Y.
C.Y .
and W'ways
Each
Each
L.S .
Unit
Price
$5,000
$20
$20
$100.00
$2,500
$8,000
$10,000
$25.00
$650
$3.00
$130.00
$4,000
$2,500
$20.00
$25.00
$230,000
$200,000
$80,000
Subtotal -A/C No. 333 -Turbines and Generators
-3 -
10-Feb-88
Amount($)
44,353
193,200
60,000
966,000
22,176
---------
1,285,729
------------
15,794
10,000
1,000
65,000
24,000
279,500
24,000
4,936
------------
424,230
-------
4,800
2,750
---------
7,550 _ .. ___ .. ______
2,045,328 __________ ,. __
230,000
200,000
80,000
510,000
----' ... -------
....._ ________________ Ott Water Engineers, Inc. ---------------
Ott Water Engineers,Inc. Alaska Power Authority
WALKER LAKE PROJECT
ALTERNATIVE NO. 2B
DETAILED COST ESTIMATE (1988 Dollars)
FERC
A/C No.
Description Quan-
tity
334 ACCESSORY ELECTRICAL EQUIPMENT
.01
. 02
. 03
Excitation, switchgear, station service,
controls and protective relays 1
Supervisory controls 1
Communication Equipment 1
Unit
L.S .
L.S .
L.S.
Unit
Price
$140,000
$80,000
$20,000
Subtotal -A/C No. 334 -Accessory Elect. Equip.
335 MISCELLANEOUS MECHANICAL EQUIPMENT
.01 5-ton Overhead Crane
.02 Miscellaneous Equipment
1
1
Each
L.S.
$15,000
$8,000
Subtotal -A/C No. 335 -Misc. Mechanical Equipment
336 ROADS, RAILROADS AND BRIDGES
.01 Upgrade Existing Logging Road
.02 New Road to Dams
.03 Grade and surface exist. P.H. road
3.10
1. 70
6.00
Mile
Mile
Mile
$50,000
$65,000
$40,000
Subtotal -A/C No. 336 -Roads, Railroads and Bridges
350 LAND AND LAND RIGHTS
. 01 Land Rights -Transmission Facil. 0 L.S .
Subtotal -A/C No. 330 -Land and Land Rights
353 SUBSTATION EQUIPMENT AND STRUCTURES
353 .1 SWITCHYARD
. 11 Transformer (4.16/34.5kV) 1 L.S .
.12 Switches, Breakers and Misc. Equip 1 L.S.
Subtotal -Walker Lake Switchyard
353 .2 KLUKWAN SUBSTATION
. 21 Transformer (34.5kV/12.47kV) 1 L.S .
.22 Switches, Breakers and Misc. Equip 1 L.S.
Subtotal -Klawock Substation
Subtotal -A/C No. 353 -Substation Equipment
-4 -
$0
$30,000
$30,000
$27,000
$30,000
10-Feb-88
Amount($)
140,000
80,000
20,000
240,000
15,000
8,000
23,000
155,000
110,500
240,000
505,500
0
0
30,000
30,000
60,000
27,000
30,000
57,000
117,000
'----------------Ott Water Engineers, Inc.---------------"
Ott Water Engineers,Inc. Alaska Power Authority
FERG
A/G No.
355
355
356
356
359
.1
.11
.12
.13
.1
.11
.12
.13
.14
. 01
.02
WALKER LAKE PROJECT
ALTERNATIVE NO. 2B
DETAILED COST ESTIMATE (1988 Dollars)
Description
POLES AND FIXTURES
Quan-
tity
Unit
POWERHOUSE TO KLUKWAN & HAINES, 34.5 kV,
Poles
20 miles
1 L.S.
Guys, Anchors & other material
Installation
1 L.S.
20 Mile
Subtotal -A/G No. 355 -Poles and Fixtures
OVERHEAD CONDUCTORS AND DEVICES
POWERHOUSE TO KLUKWAN & HAINES, 34.5 kV, 20 miles
Conductors 1 L.S.
Insulators 1 L.S.
Hardware and Miscellaneous 1 L.S.
Installation 20 Mile
Subtotal -A/C No. 356 -Overhead conductors,
LINE CLEARING, MOBILI~E AND DEMOBILIZE
Mobilize and Demobilize 1 L.S .
Light Clearing 4 Acre
10-Feb-88
Unit Amount($)
Price
$80,000
$27,000
$30,000
$40,000
$60,000
$27,000
$24,000
etc
$40,000
$5,000
----
80,000
27,000
600,000
707,000
40,000
60,000
27,000
480,000
-------
607,000
-----------
40,000
20,000
-------------
Subtotal -A/C No. 359 -Clearing, Mob, and Demob. 60,000 ___ ,.. ___ ,.. ___ ....
- 5 -
....._ _______________ Ott Water Engineers, Inc.---------------"'
Ott Yater Engineers,Inc. Alaska Power Authority
Alaska Power Authority
WALKER LAKE PROJECT
SUMMARY OF DETAILED COST ESTIMATE (1988 Dollars)
***** (ALTERNATIVE 3, OPTION B:)
FERC
A/C No. Description
330 Land and Land Rights
330.5 Mobilization and Logistics
331 Structures and Improvements
332 Reservoirs, Dams and Waterways
333 Turbines and Generators
334 Accessory Electrical Equipment
335 Misc. Mechanical Equipment
336 Roads, Railroads and Bridges
350 Land and L&nd Rights
352 Transmission Struct. and Improv.
353 Substation· Equipment
355 Poles and Fixtures
356 Overhead Conductors and Devices
359 Line Clearing, Mob, and Demob.
SUBTOTAL, ESTIMATED COSTS
Contingency Allowance * 25.0%
TOTAL ESTIMATED DIRECT COST
Engineering and Administration* 17.5%
TOTAL CONSTRUCTION COST
Amount($)
0
193,000
303,900
3,092,759
920,000
420,000
40,000
602,500
0
n/a
205,000
787,000
715,000
60,000
7,339,159
1,834,790
9,173,949
1,605,441
$10,779,390
*Covering environmental studies and licensing (5%), design
and specification (6%), legal and financial fees (1.5%) and
construction management (5%).
10-Feb-88
Ott Water Engineers,Inc. Alaska Power Authority
WALKER LAKE PROJECT
ALTERNATIVE NO. 3B
DETAILED COST ESTIMATE (1988 Dollars)
10-Feb-88
FERC
A/C No.
Description Quan-
tity
Unit Unit Amount($)
Price
330 LAND AND LAND RIGHTS
.01
330 .5
.51
.52
.53
.54
.55
.56
.57
. 58
331
331 .1
.11
.12
.13
.14
.15
.16
.17
.18
.19
331 . 2
. 21
.22
. 23
. 24
.25
. 26
Land Rights -Generation Plant 0 L.S.
Subtotal -A/C No. 330 -Land and Land Rights
HOBILIZATION AND LOGISTICS
Temp Canst Roads for Penstock
Open Storage and Helipads
Covered Storage & Office
Construction Power
Temporary Water System
Construction Surveys
Bridge across Walker Ck
Subsistence
1.00
1
1
1
1
1
1
800
Mile
L.S.
L.S.
L.S.
L.S.
L.S.
L. s .
Days
$0
$50,000
$10,000
$10,000
$10,000
$5,000
$30,000
$30,000
$60
Subtotal -A/C No. 330.5 -Mobilization and Logistics
STRUCTURES AND IMPROVEMENTS
POWERHOUSE
Clearing
Excavation
Concrete (including reinforcing)
Hisc. Metals
Partition Walls
Furnishings and Fixtures
Pre-eng'd Metal Superstructure
HVAC and Plumbing
Grounding Grid
Subtotal -
POWERHOUSE SITE/SWITCHYARD
Fill
Crushed Rock Surfacing
Drainage
Chain Link Fencing
16-foot Double Gate
Foundations
Subtotal -
2
300
200
2,000
1
1
1,320
1
1
Powerhouse
200
100
1
200
1
20
Acre
C.Y.
C.Y.
Lb.
L.S.
L.S.
S. F.
L.S.
L.S.
C.Y .
C.Y.
L.S .
L.F .
Each
C.Y .
$5,000
$25
$650
$3.00
$3,000
$2,000
$45.00
$15,000
$15,000
$10
$20
$10,000
$30
$1,000
$600
Powerhouse Site/Switchyard
- 1 -
0
0
50,000
10,000
10,000
10,000
5,000
30,000
30,000
48,000
193,000
10,000
7,500
130,000
6,000
3,000
2,000
59,400
15,000
15,000
247,900
2,000
2,000
10,000
6,000
1,000
12,000
33,000
..._ _______________ Ott Water Engineers, Inc.----------------
Ott Water Engineers,Inc. Alaska Power Authority
FERC
A/C No.
331 .3
.31
.32
.33
.34
.35
332
332 .1
.11
.12
.13
.14
.15
.16
.17
.18
332 .2
.21
.22
.23
. 24
. 25
.26
.27
.28
.29
. 210
WALKER LAKE PROJECT
ALTERNATIVE NO. 3B
DETAILED COST ESTIMATE (1988 Dollars)
Description Quan-Unit
tity
KLUKWAN SUBSTATION
Crushed Rock Surfacing 100 C.Y.
Drainage 1 L.S.
Chain Link Fencing 200 L.F.
16-foot Double Gate 1 Each
Foundations 20 C.Y.
Unit
Price
$20
$2,000
$30
$1,000
$600
Subtotal -Powerhouse Site/Switchyard
Subtotal -A/C No. 331 -Structures and Improvements
RESERVOIRS, DAMS AND WATERWAYS
DAM AND SPILLWAY ON LITTLE SAlMON
Diversion and care of Water 1 L.S. $20,000
Clearing 1.0 Acre $5,000
Common Excavation 150 C.Y. $15
Rip-Rap 357 C.Y. $35
Mass Concrete 176 C.Y. $400
Structural Concrete 20 C.Y. $650
Miscellaneous Metals 1,200 Lb. $4.00
Sluice Gate 1 L.S. 15000
Subtotal -Dam and Spillway
DAM AND SPILLWAY AT LAKE( 2 ROCKFILL DAMS)
Diversion and care of Water 1 L. s. $25,000
Clearing 3.0 Acre $5,000
Common Excavation 1,156 C.Y. $10
Dumped Rockfi11 1,896 C.Y . $15
Compacted Rockfill 1,200 C.Y . $50
Rip-Rap (incl. channel eros cntrl) 300 C.Y. $35
Concrete (Spillway) 66 C.Y. $650
Sluice Gates 2 L.S. $15,000
Outlet Piping (3' Dia.) 250 L.F. $100
Outlet Channel Exc . 5,867 C.Y. $5
Subtotal -Dam and Spillway
10-Feb 88
Amount($)
2,000
2,000
6,000
1,000
12,000
------------
23 '000
------------
303,900
-----------
20,000
5,000
2,250
12,507
70,400
13,000
4,800
15,000
-------
142,957 ______ ,.._
25,000
15,000
11,556
28,444
60,000
10,500
42,611
30,000
25,000
29,333 __ .., _________
277,444 _.,. __________
Ott Water Engineers,Inc. Alaska Power Authority
FERC
A/C No.
332 .3
332 .31
. 311
.312
.313
.314
.315
.316
.317
.319
.3110
. 3111
332 .32
.321
. 322
.323
.324
.325
.326
.327
.328
332 .33
.331
. 332
. 333
. 334
.335
WALKER LAKE PROJECT
ALTERNATIVE NO. 3B
DETAILED COST ESTIMATE (1988 Dollars)
Description
WATERWAYS
Quan-
tity
Unit
INTAKE ON LITTLE
Clearing
SALMON RIVER & PIPELINE TO WALKER LAKE
Bedding Material
Pipe Backfill
Rip rap
Concrete (Including reinforcing)
Trashrack & Stru. Steel
Hi dnsty poly., 18" Dia. (instld)
18-inch diameter Gate
Misc. Steel
Revegetation and Erosion Control
2 Acre
143 C.Y.
1119 C.Y.
15 C.Y.
40 C.Y.
2,000 Lb.
5,810 L.F.
1 Each
1,000 Lb.
0.4 Acre
Subtotal -Intake & U. Pipeline
INTAKE AT WALKER LAKE
Bedding Material
Rip rap
Concrete (Including reinforcing)
Trashrack & Stru. Steel
Steel Pipe, 30 inch diameter
30-inch diameter Gate Valve
Misc. Steel
Revegetation and Erosion Control
20
25
30
10,500
70
1
1,000
0.4
C.Y .
C.Y.
C.Y.
Lb.
L.F.
Each
Lb.
Acre
Subtotal -Intake & U. Penstock
LOW PRESSURE PIPELINE (Walker Lk. to
Clearing
Trench Excavation and Backfill
Bedding Material
Steel Pipe, 30 inch diameter
Revegetation and Erosion Control
Top of
8.9
9,660
4,000
9,660
8.9
Penstock)
Acre
L.F .
C.Y .
L.F .
Acre
Subtotal -Intake & Upper Penstock
- 3 -
10-Feb-88
Unit Amount($)
Price
$5,000
$25
$15
$35
$650
$3.00
$55.00
$4,000
$3
$2,500
$25
$15
$650
$3.00
$130.00
$15,000
$3
$2,500
$5,000
$25
$20
$130.00
$2,500
10,000
3,586
16,784
525
26,000
6,000
319,550
4,000
3,000
1,000
390,446
500
375
19,500
31,500
9,100
15,000
3,000
1,000
79,975
44,353
241,500
80,000
1,255,800
22,176
1,643,829
"'----------------Ott Water Engineers, Inc. -----------------
Ott water Engineers,Inc. Alaska Power Authority
FERC
A/C No.
332 .34
332 .341
.342
.343
.344
.345
.346
.347
. 348
.349
332 . 35
.351
. 352
WALKER LAKE PROJECT
ALTERNATIVE NO. 3B
DETAILED COST ESTIMATE (1988 Dollars)
Description
Penstock
Above-ground Penstock (2,150' long)
Clearing (40' wide)
Additional Tree Removal
Excavation
Concrete in Anchor Blocks
Structural Steel
Steel Penstock, 30 inch diameter
Expansion Joints
Revegetation and Erosion Control
Quan-
tity
2.0
1
50
120
11' 000
2,150
6
2.0
Unit
Acre
L.S.
C.Y.
C.Y.
Lb.
L.F .
Each
Acre
Subtotal -Above-ground Penstock
Tailrace
Excavation
Rip-Rap
·Subtotal -
370
179
Tailrace
C.Y .
C.Y.
Subtotal-A/C No. 332-Res., Dams and W'ways
333 TURBINES AND GENERATORS
.01
.02
.03
Furnish 3000 HP Multi-jet
impulse turbine, including inlet
valve, controls and governor
Furnish 2300 kW generator
Install turbine-generators
1
1
1
Each
Each
L.S.
Unit
Price
$8,000
$10,000
$25.00
$650
$3.00
$175.00
$4,500
$2,500
$20.00
$25.00
$450,000
$350,000
$120,000
Subtotal -A/C No. 333 -Turbines and Generators
334 ACCESSORY ELECTRICAL EQUIPMENT
.01
. 02
. 03
Excitation, switchgear, station service,
controls and protective relays 1
Supervisory controls 1
Communication Equipment 1
L.S.
L.S .
L.S .
$260,000
$140,000
$20,000
Subtotal -A/C No. 334 -Accessory Elect. Equip.
335 MISCELLANEOUS MECHANICAL EQUIPMENT
.01 10-ton Overhead Crane
.02 Miscellaneous Equipment
1
1
Each
L.S.
$30,000
$10,000
Subtotal -A/C No. 335 -Misc. Mechanical Equipment
10-Feb-88
Amount($)
15,794
10,000
1,250
78,000
33,000
376,250
27,000
4,936
546,230
7,407
4,471
11' 878
3,092,759
450,000
350,000
120,000
920,000
260,000
140,000
20,000
420,000
30,000
10,000
40,000
- 4 -......._ ________________ Ott Water Engineers, Inc. ----------------
Ott Water Engineers,Inc. Alaska Power Authority
FERC
A/C No.
336
.01
.02
.03
. 04
. 05
350
.01
353
353 .1
.11
.12
353 .2
.21
.22
355
355 .1
.11
.12
.13
356
356 .1
.11
.12
.13
.14
WALKER LAKE PROJECT
ALTERNATIVE NO. 3B
DETAILED COST ESTIMATE (1988 Dollars)
Description Quan-Unit
tity
ROADS, RAILROADS AND BRIDGES
Upgrade Existing Logging Road 3.10 Mile
New Road to Dams 1. 70 Mile
New Road to Little Salmon Diversn 0.8 Mile
60-foot Prefab . Bridge Installed 1.00 Each
Grade and surface exist . P.H. road 6.00 Mile
Unit
Price
$50,000
$65,000
$65,000
$45,000
$40,000
Subtotal -A/C No. 336 -Roads, Railroads and Bridges
LAND AND LAND RIGHTS
Land Rights -Transmission Facil. 0 L. s. $0
Subtotal -A/C No. 330 -Land and Land Rights
SUBSTATION EQUIPMENT AND STRUCTURES
SWITCHYARD
Transformer (4.16/34.5kV) 1 L.S. $55,000
Switches, Breakers and Misc. Equip 1 L.S. $55,000
Subtotal -Walker Lake Switchyard
KLUKWAN SUBSTATION
Transformer (34.5kV/12.47kV) 1 L.S. $45,000
Switches, Breakers and Misc. Equip 1 L.S. $50,000
Subtotal -Klawock Substation
Subtotal -A/C No. 353 -Substation Equipment
POLES AND FIXTURES
POWERHOUSE TO KLUKWAN & HAINES, 34.5 kV, 20 miles
Poles 1 L.S. $80,000
Guys, Anchors & other material 1 L.S. $27,000
Installation 20 Mile $34,000
Subtotal -A/C No. 355 -Poles and Fixtures
OVERHEAD CONDUCTORS AND DEVICES
POWERHOUSE TO KLUKWAN & HAINES, 34.5 kV, 20 miles
Conductors 1 L.S. $68,000
Insulators 1 L.S. $80,000
Hardware and Miscellaneous 1 L.S. $27,000
Installation 20 Mile $27,000
Subtotal -A/C No. 356 -Overhead conductors, etc
10-Feb-88
Amount($)
155,000
110' 500
52,000
45,000
240,000
-----------
602,500
------------
0
--------
0
------------
55,000
55,000 _____ ,.. ______
110,000
-------------
45,000
50,000
------------
95,000
-----------
205,000 __ .,. _________
80,000
27,000
680,000
------------
787,000
-----------
68,000
80,000
27,000
540,000
---·--------
715 '000
-·----------
----------------Ott Water ~ngineers, Inc.---------------"
Ott Water Engineers,Inc. Alaska Power Authority
FERC
A/C No.
359
.01
.02
WALKER LAKE PROJECT
ALTERNATIVE NO. 3B
DETAILED COST ESTIMATE (1988 Dollars)
Description Quan-Unit
tity
LINE CLEARING, MOBILIZE AND DEMOBILIZE
Mobilize and Demobilize 1 L.S.
Light Clearing 4 Acre
10-Feb-88
Unit Amount($)
Price
$40,000
$5,000
40,000
20,000
Subtotal -A/C No. 359 -Clearing, Mob, and Demob. 60,000
-6 -.._ _______________ Ott Water Engineers, Inc. ----------------