HomeMy WebLinkAboutCrescent Lake Engineering Report 1954'•
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CITY OF SEWARD
Alaska
Engineering Report
on
. PROPOSED
CRESCENT LAKE
HYDROELECTRIC PROJECT
HOWARD T. HARSTAD & ASSOCIATES
Engineers-SMttle
December, 1954
SENECA 2525
FtLE No.
HOWARD T. HARSTAD & ASSOCIATES
CONSULTING ENGINEERS
HonorablA Mayor and City Council
and Seward Utility Board
City of Seward
Seward, Alaska
Gentlemen:
VOLKER 8UJL.DING
1000 LENORA ST.
SEATTLE 1, WASHINGTON
December 30, 1954
In accordance with your authorization we have prepared the following
report on development of Hydroelectric Power for Seward.
Jur studies indicate that the proposed Crescent Lake Project is the
most economical and suitable for the City of Seward, The first
3500 KW Unit of the Project, including generatlon, transmission and
distribution extensions, can be constructed for an estirrated cost of
$2,200,000. The Project can be expanded at a later date to a total
installed capacity of 10,500 KW. In our opinion, the Project is
feasible under the present rate schedule and power rates can be
substantially reduced as soon as the average load increases to
approximately 25% of the installed capacity of the unit. It is pro-
bable that this power demand will exist by the time the Plant could
be placed in service late in 1956.
The low cost hydro power which this project will produce, coupled
with a transmission system to Seward and to Kenai Junction, will
make Seward the focal point of the Kenai Peninsula. The proposed
construction will be an asset of the utmost importance to the City
and the entire area.
The details of the proposed plan, preliminary cost estimates, and
supporting data, together with our conclusions and recommendations,
are contained in the attached Report which is herewith respectfully
submitted.
HTH:c
Encl. -Eng. HepC~rt
Seward
Yours very truly,
HO\IlARD T. HARSTAD & ASSOCIATES
/~~t~lr/ _7 ~~d,
Howard T, Harstad
T A B L E 0 F C 0 N T E N T S
SL~\RY OF ECONOMICS • • • •
INTRODUCTION
THE CITY OF SEWARD AND TERRITORY SERVED
PROPOSED CRESCENT LAKE HYDROELECTRIC PROJECT
Project Description
Topography and Geology
Hydrology ,
Cost Estimate • •
REVENUES AND EXPENSES ON PRESENT SYSTEM ,
Rates , • • • • • • •
Diesel Generation Production Costs •
Historical Sales • •
Sales by class of CustowBr •
Ana~sis of 1953 Sales ,
Customer Data
Audits
•
•
•
ESTI~\TED OPEfu\TING RESULTS WITH PROPOSED IMPROVE~mNTS
1953 Operating Results • • , • • • •
Expected Annual Operating Results with Present
Customers plus Proposed Extension Utili~ing
Present Diesel Plant ~
Expected Annual Operating Results with
1,400 Customers and Crescent Lake Hydro
Operating Results of Hydro Plant
Transmission to Kenai Junction
Conclusions and Reeorn.rr.endations
i
Page
. 0
. 1
. 2-5
. 6-7
• 8
• 9-10
• 11-13
• 14
• 15
• 16
• 17
. 17
• 17
• 18
• 18
• 19
• 20-21
• 22
• 23
• 24-26
• 27
PICTURES Following Page
Crescent Lake Hydroelectric Project • 0
Dam at Outlet of Crescent Lake 7
Intake • • • 7
PLATES
1. Location M~p • • 0
2. Services and Power Requirement vs. Years • 5
3· Daily Load Curve • 5
4. Electric Diagram • 7 s. Future Transmission Lines, Map • • 7
6. Turbine and Generator •• 7
7. Load -Efficiency Curve 7
8. Crescent Lake Hydroelectric Project, Map • 7
9. Lake Channel and Intake Channel • 7
10. Crescent Lake Dam • 7
11. Intake Structure and Spillway . • 7
12. Crescent Creek, Monthly Hydrograph
and Required Storage • • 10
13. Crescent Creek, Weekly Hydrograph
and Flow -Duration Curve • • • • 10
14. Crescent Creek, Mass Diagram • • • • • 10
ii
TABLE OF CONTENTS -------------
Following Page
TABLES
1. City of Seward, Financial Stata~ent •
2. Crescent C:·.·0ek, Monthly Run-Off at
Cooper Landing • • 10
3. Annual Precipit~tion at Seward • 10
4. Diesel Power Production ExpensBs • • 16
5. Statement of Income • 18
0
SUMMARY OF ECONOMICS
Project to be financed by Revenue Bonds which are an obligation against the
earnings of the electric system.
There is no obligation against any city property or any land or property
which is privately owned.
Bonds: EsM.mates based on 4-3/4% interest, bonds retired over a period of
30 years, These bonds will require a pay~ent of ~63.30 per year for each
$1,000 bond in payment of principal and intereEt,
COST OF WHOLESALE P~JER AT SEWARD
69KV Comparative
Trans-Total Cost of 3500 KW Hydro
and Substation mission at Seward Diesel Power 2
Construction Cost $1,550,000 $480,000 :ll'2,030,000
Annual Cost
?rincipal and Interest ~ 98,200 t .30,400 $ 128,600
Maintenance and Operation 28.000 3,600 31,600
Tote.l $ 126,200 $ 34,000 $ 160,200
Wholesale Cort -¢/KliJHl
At present available load
of 6.7 million KWH/yr 1.88¢ 0.51¢ 2.391 3.0:¢
At 1957 estimated load of
10 million KWH/yr ' 1.26¢ 0.34¢ 1.60¢ 2.65¢
At 50% of installed capacity
15.3 million K1tJH/yr 0.82¢ 0.23¢ 1.05¢ 2.30¢
With the .:·.1ture addition of Units Nos. 2 and 3, the Wholesale Cost of power
at Se-vmrd will drop to 0,'{5¢ and 0.66¢ per KWH. DiRt~ibutio'1 costs, reserves,
~,d improvements ~,1st be added to tha above for Rate to ConsUmer.
Distribution, Upper Trail Lake to Seward
Construction Cost
Annual Cost, Principal and Interest
The maintenance, oper~tion and annual cost would be
paid out of Retail Sales
tl70,000
10,760
TOTAL COST OF PROJECT $2,200,000
1For one 3500 KW Unit which can produce 30,600,000 KWH/yr.
2Based upon Diesel Plant construction cost of $165/KW and present
maintenance and operating cost of 2.42¢/KWH
I I
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•
CRESCENT LAKE HYDROELECTRIC PROJECT
Crescent Lake 8 Carter Lake are out
of sight in background
Power house will have one 3500 K W
Impulse Turbine Driven Generator
with provisions for two more units
at a latter date
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STATUTE MILES
4 8
I
CITY OF SEWARD
LOCATION MAP
CRESC_E NI.J~.~~E. -~~OJECT
K.T. Doll NOV.I954
Scole 1" • 4 MILES Sheet I of
H. T. HARSTAD a ASSOCIATES
ENGINEERS -SEATTLE ._....::........__...J
INTRODUCTION
The City of Seward owns and operates a municipal electric system,
and provides exclusive power utility services within the corporate limits
and the surrounding area.
1
For years many people in Soward have viewed the several ex~ollent
hydro sites in the area with the hope that the cit,y might soms day develop
a hydro site and eventually obtain benefits of low cost hydro power. This
viewpoint is consistent with earlier developments in several Alaska
Communites as well as highly developed hydro electric systems in the Pacific
Northwest.
In June 1954, the writer submitted a report on "Current Operations
and Proposed Improvements of Electric System.11 The report was prepared
primarily in cor.nection i-7ith the addition of a 1200 KW Diesel Unit. How-
ever, pralimina!J-examination of the several possible hydro sites and the
pcwer n~.~::·ket indbated that it might be possible in the ::.mmediate fu'l::::..:.re
to economically deve::.r.p a hydro project followinG the 1200 KW diesal unit.
The report, included a recommend~tion that a thorough investigation be made
of h~rdroalectric possibilities. Accordingly, in July 1954 the Utility
Board and City-Council a;,;;:Lhorized the preparation of this report.
The reporting Enginee~s have been engaged in the design and
improvem-:mt of M::.nicipal Utilities and have been responsible for many
enginl3crir.g investigatiG::19 in connection with the sale of revenue bond
issues for the acquisition and construction of municipal utilities includ-
ing power systems.
2
THE CITY OF SEWARD AND TERRITORY SERVED
The City of Seward was incorporated on June 1, 1912, under the laws
of the Territor,y of Alao~a. It is a cit,y of the first class, and has a council-
manager form of government. City officials at this time are:
Mayor -Hussell Painter-Operates Transfer Co.
City Clerk -Sigrid Stearns
City Manager -Raymond F. 0 'Hara
Council -Perry Stockton -Supervisor, Northern Stevedoring
Gil Anthony -Checker, Northern Stevedoring
o. T. Blair -Cashier, Alaska Railroad
Harr,y West -Sells Insurance
Alex Petrovi tch-Equip~mnt Sales
Neville Hudson -Hotel Keeper
The Seward Electric System was inaugurated in 1941, with the con-
struction of a small diesel-electric generating station. In 1950, the
city purchased the er.tire propert,y and business of the Senmrd Light &
Po-vrer Company, and procee:~.cd with a comprehensive program of rehabilitation
and expansion.
The ~anageme~t of the water system and electric system is vested
in a five-man utility board, elected for staggered terms of five years.
The manager of the electric system is Raymond F. O'Hara.
T~e present members of the Board are:
Phil Durant, Chairman -Durants Hardware
Murl Trevethnn, Sc~retar.y -Dock Supt., Northern Stevedoring
Robert Stoarns -Checker, Northc rn Stevedoring
Richard Meyers
Alvin Schmoyer
-Oil Delivery Driver
-Longshoreman
3
Extracts from the City's latest financial staterrents appear on
following page 5:
The city's tax collection record follows:
Real and Personal Property as o~ June 30, 1952
Amount Amount Per Cent
Year of l.:..?JY Collected Collect.8d ---
1951-52 $84,909 $80,833 95.2%
1950-51 82,770 81,549 98.5
1949-50 79,117 78,803 99.6
In addition to general taxes, the City of Seward has a sales tax
of 2% which w~nt into effect September 23, 1949. Revenue from this source
is used for schools, public health and sanitation purposes. Income from
this source for fiscal years ending June 30 is as follows:
(For Education, Public Health and Sanitation Fund)
1952-53
1951-52
1950-~1
19~9-50
$80,754
73,!+62
57,556
48,489
Seward is located at the head of Resurrection Bay on the
Kenai PeninsuJ.a. It is about 1,100 nautical miles north of Seattle. The
surrounding area lies in the Chugach National Forest, with wooded river
and creek valleys, rising to rugged hills and peaks, interspersed with
glaciers and with numerous lakes.
The city has long been the main transportation center for
inland Alaska, since it has the best year-around harbor and is located
at the southern termin~s of the Alaska Railroad. A Seward-Anchorage
Highway, approximately 130 miles long, was recently completed for year-
around traffic. Wat.er transportation is furnished by the Alaska
Steamship Company, the Coastwise Line, Berger Transportation Company,
and Alaska Freight Lines. The Standard Oil Company of California
4
maintains in Seward the largest bulk and distribution plant in Alaska. The
railroad belt and interior of Alaska are dependent upon the Standard Oil
Company facility for much of their fuel storage. This company recently
completed a large expansion and modernization project at the Seward terminal.
While largely dependent upon its importance as a transportation
center, the city 1 s economy includes mining, lumber, fishing and service
facilities. The Kenai Peninsula, on which Sevrard is located, is the
largest and best known big game and sport fishing section of Alaska, and
attracts sportsmen and tourists from all over the world. Climatic condi-
tiona are favorable due to the warming effect of the Japan Current. A
climatic summa~ follows:
S@~ARD CLIMATIC SUMMARY
Temperature -
Length of Record
January Average
July Average
Maximum
Minimum
Killing Frost Average DatGs -
Length of Record
Last in Spring
Fir~t in Fall
Grovling Season
Average Precipitation -
Length of Record
January
FebruJ.ry
March
April
May
June
JuJ,V
August
September
October
November
December
4.46
4.91
3.34
4.25
3.39
2.42
2.83
5o92
9.60
11.06
14.85
6.70
Average
26 years
22.4 DAg. F.
55.3 Deg. F.
82 Deg. F.
-20 Deg. F.
18 years
May 18
Sept. 27
132 days
26 years
73.73 inches
The city is modern, and has adequate hospital, church and municipal
facilities. It maintains and operates its own school s.ystem. Population
statistics follow:
1~9Cms~ %9
1950 Census 2,114
195? Estimated 2,500
The Alaska Railroad runs from the Ports of Seward and Whittier
through Anchorage to Fairbanks, 470.3 miles from Seward. The railroad
was built and ia operated by the United States government. Branches
serve the farming and coal mining regions of the Matanuska Valley and
the coal mines on the Healy River. It r,:aintains regular passenger and
freight serrice throughout the year. The total mileage operated at the
end of 1952 was 535.9. At Anchorage and Fairbanks the railroad connects
with the central hig~1ay system. At Nenana, freight and passengers are
transferred in the summer months for river boat transportation up and down
the Yukon and TBnana Rivers.
The city owns and operates its wate~ utility and marine ways in
addition to the elect~ic ~:stems. Post office receipts follow:
~eward Post Office Receipts (2nd Class)
1948 $24,572
1949 29~330
1950 28,401
1951 36,460
1952 3/,467
The Bank of Seward became a branch of First National Bank of
Anchorage as of January 2, 1952. The parent bank had total assets of
$36,218,272 as of June 30, 1953.
The Federal government is currently engaged in a $12,000,000
reconstruction project on the Seward-Portage Line of the Alaska Railroad
and a pier at Seward,
The proposed project will serve approximately 200 additional
customers on the outskirts of Seward and 32 miles along the highway to
Upper Trail Lake where the hydro plant will be located.
CITY OF SEWARD
FINANCI!\L STATEHENT
Assessed Valuation -1953
Real Property (66% of actual)
Personal Property (50% of act~al)
Bonded Debt as of April 1, 1953
GO Bonds (incl. school bonds)
Bond Redemption Fund
Municipal Electric System Revenue Bonds
Bond Redemption Fund
Marine Wnys Revenue Bonds
Bo~d Redemption Fund
Cash on Hand, Net, General Fund
Water RGvenue Bonds -4-3/4%
Dated 5/1/53 to 5/2/80
Net
Net
Net
Table No. 1
$4,553,164
2,442,524
$6,995,688
$ 93,500
32 2 603
$ 6o, 897
$ 288,000
9,996
$ 278,004
$ 32,000
11,621
$ 20,379
$ 15,383
$ Loo,ooo
Fiscal Year Ended June 30, 1953
Revenues (General Fund)
52-53 51-52 50-51
Taxes $115,064.96 $ 88,2L0.68 t 84,288,36
Licences and Permits 35, 6?7 I 91 35,737.80 26,320.73
0\,Ler Revenues 9,384.75 6,250.80 18,416.08
Mi::c&llaneous Revenue 19,938.05 6,796.03 1,237.66
Transfers from Se1-mrd Housing Area 32 867.50 10,000.00
Total Revenues $183' 953.17 $137,025.31 $140,262.83
Total Expenditures $123,376.04 ~,155 J 085 I 30 -lt·$131,173.67
*Deficit due mainly to Street Department expenditures
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10
SEWARD ELECTRIC SYSTEM
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PROJECT DESCRIPTION
General
The previous Engineering Report by Metcalf & Harstad Associates on
Current Operations and Proposed Improvements of the Electric System
for the City of Sew&rd recommended the investigation of a hydro-
electric power plant as a reliable and economic source of power for
the city and surrounding area. The proposed plant would replace the
present diesel plant as the primar,y source of power. The diesel
plant would be maintained for standby purposes.
Investigations were made of various possible project sites and the
Crescent Lake Project was selected as the most advantageous site
considering economic feasibility and capacity to fill present and
future needs of the city and adjacent area.
A study of the past 15-year development of the city shows a steady
and continuous growth in population as well as residential and
commercial power reqairements. This growth is graphically presented
on Plate No. 2.
Our etudies pointed to the desirability of installing a single
3500 KW unit at ·t.his time with provision for installing a second and
eventually a third un.i t to take care of the growing power require-
ment. It is expected that the first unit will satisfy the load
derr~nd until approximately 1960, at which time the second unit will
be installed. The cost of tbe second unit will be far smaller than
tl.1e initial development.
Project Description
Water will be impounded in Crescent Lake by the construction of a
20-foot h:igh o'il.rth dam with a crest ole,ration of 1, 4 70 at the outlet
of the lake. This small structure will provide adequate storage
during th~ lou flow period. The dam will be constructed of gravel
and glacial till which is available at the dam site. The upstream
face of the clam and the right abutment will be blanketed with
impervious fill. A 3-foot gated sluice pipe will be installed to
handle l'Tc.ter during construction and to serve as an emergency outlet
cluring flood periods.
Crescent Lake 1-Jill be connected with the small lake to the north,
vlhich is called Carter Lake in this Rep•)rt, by means of a 4,000-foot
open channel. The normal elevation of the connected lak0s will be
1, L65. Th3 bottom of the lake channel, and of the chanr:el from
Carter Lake to the penstock intake, will be at elevation 1,450.
This arrangement provides 5 feet freeboard at the dam, 5 feet
allowance for ice and slush and 10 feet for drawdown during the dr.y
season. Since the two channels represent a substantial investment,
costs were investigated with channel bottom elevations at 1,440,
1,450 and 1,460. Channels at elevation 1,460 had, of course, the
least excavation cost, but did not allcw sufficient lake storage.
At elevation 1,450, the cost was reasonable and permitted adequate
storage, as well as the possibility of raising Cresent Dam in the
future to impound water for the additional units,
7
From Carter Lake the intake channel will run 1,600 feet in open cut
following Carter Creek to the penstock intake and the adjacent spill-
way. The spillway is of the side channel type with a 200-foot weir
wall design3d for a flood of 2,000 cubic feet per second. Top of
the spillway is elevation 1,465. The intake con~ists of a simple
reinforced concrete structure with a bar stock trash rack, stop logs
and a manually operated intake gate. There are also two sluice gates
which discharge into the spillway discharge channel. These sluice
gates serve to dra~1 the water level dOim and to remove floating ice
from the channel. The intake structure will also have a water level
recorder.
The penstock is approximately 4,000 feet long and tapers from 54 inches
diameter to 24 inches diamter at the plant. At the end of the 54-inch
section there will be two blind flanged branches to acco~~odate the
future penstock lines. The pipe will be designed for a 25% pressure
rise and the sections will be welded or joined by Dresser type coup-
lingso The penstock will rest on concrete saddles and ~Jill be anchored
at grade changes. Relief valves will admit air into the pipe in
emergency conditions and will prevent negative pressure.
The powerhouse will be at elevation 485 which is 980 feet below lake
level. The structure will be of reinforced concrete with one sidewall
of concrete blocks to permit future extension. The machinery consists
of one 5,000 HP horizontal shaft i~pulse turbine with inlet valve and
governor control, one 3500 KW 2400 Volt, 3-Phase generator and
accessories, The impulse type turbine is a low cost, highly efficient
machina, particularly suited to high head operation and will present
a :rr,inimum of operational and maintenance pr()blems. This tYT-o turbine
is a~.so especially suitable for this installation because i·~ maintains
high efficiency over a wide load range, which will be experienced in the
C..;ty of Seward System. An illustration showing a typical irr..p;:lse
t .. · . .:cbine installation a.nd a plats showing a J~ypical efficiency curve is
attached to this rsport.
The generator is connected to two transformers in the adjacent s~b
station. One transformer will be a 3500 KW, 2.3-69 KV oil-filled,
gas-sealed ur.it t.o step the current up for transmission, The other
m;it 'Nill be a 500 I-:',v, 2.3-7.2/12.5 KV distribuM.on transformer to
service the customers between the power plant and the City of Seward.
The transmission line will extend 32 miles from the power plant at
Upper T::.::ail Lake to the City of Seward and will be 69 KV, 3 wire,
singl9 pole construction. The distribution line will be 7.2/12.5 KV,
4 wire, U."'ldorbuilt for dis·~ribution serYice along the transmission
line. Provision has been made to run a fut~e transmisDion line to
K<m:':i ui th a connection to the Homer REA system. The basic electrical
system is presented on Plate 4 and the proposed transmission line
system on Plate 5.
The project described herein presents no particular construction
difficulties <md has sufficient flexibility to fill the present
power requiren3nts at low cost as well as being capable of stage
development to serve the needs of the City of Seward and its
adjacent territory for many years to come.
DAM AT OUTLET OF CRESCENT LAKE
INTAKE
PLATE N0.4
CRESCENT LAKE
PLANT 3500XW
KENAI c/1./NC TION
.25KV 69KV
500KVA,3~
&.3-7..2/12 .SI<V
7.2/I.C.SKV DISTRIBLITION li!.SKV
LI~E_{f!l-j'2_E~!iUJ.':PL ____________ ~
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I ,' ~-I SSI(V .3'¢ TRANSMISSION LINE -70-HIL£-S
I ·' '· I
10001( VA I 3?
6.9 -ES"KV
7.2/12.S" KY DIS TR/BliT/ON
LINE-3.8 .Mii£S
7.2/12.5 KV DISTRIBLI T!ON
LINe (t/NOERBl//LD)
SOOKVA,3¢
69-lc,SKV
70 CITY D!STRIBU/ION
SYSTEM
PROPOSED PROJ£CT
--------FUTURE PROJECT 0-HYDRO
@-DIESEL
CRESCENT LAJ(E f!Y!JROELECTRIC PROJECT
ELECTRICAL D/ACRAM
3SOOKvl,.5~
2.3 -69KV
69KV
69KVJ 3¢
TRANSMISSION
LINE-32Mi.
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··-.>·::::.;:~·/\: ~-
~tz.::~~~~ ... }>
, ...
1
-N-
l a.stt~ ~\.."
~AU I~ STATUTI "II..U . .-i
CIT·Y OF SEWARD
FUTURE
TRANSMISSION :LINE
Oete . HOY . IH4 ·,
. ...... ,,
••
H. T. , HARS-TAD 8
.INiiNif;ltl -
A880ctAT~s ·
SEAf'n.E
. .. . ..
• • •• • • • • • • • • • • •• • • • • • • • • • • • •• • • • • • • • • • • • •• • •• • • •
-----·---------------------------------------------------------,
,
PLATE N0.6
9
7
by courtHy of
PELTON WATERWHEEL COMPANY
I INLET VALVE (SHUT-OFF)
2 NEEDLE NOZZLE (FLOW ADJUSTMENT)
3 JET DEFLECTOR (SUDDEN FLOW DEFLECTION}
4 TURBINE WHEEL 8 BUCKETS
5 TURBINE-GENERATOR SHAFT
6 TURBINE-GENERATOR BEARING
7 LOWER TURBINE HOUSING
8 UPPER TURBINE HOUSING
9 OIL PRESSURE GOVERNOR 8 GOVERNOR PUMP (TURBINE SPEED
10 GENERATOR CONTROL)
II EXCITER
GENERAL ARRANGEMENT
TURBINE 8 GENERATOR
By K .T .
Scale NONE
Date NOV 1954
Sheet I of 1
HOWARD T HARSTAD ASSOCIATES
ENG1NEERS-SEATTLE
PLATE NO 7
I
I
tr
lW II 1'\1 ~ IV
II 1...-p, 'I
!.J
J.,. Jo::::joo.
~ l..oo I'
I
I\
ll
" ""
1\,
1/ t> j r--.
"" . ~f?~ / ,_
fl
,,.
v
I
r j-
I
1-
l/
-1/,~' ~~ ~~--L' I .t':'~ _..,. ...
~[) t Ll . -
Jjj
-
,.
'(] . ~
lr -~~ f'j~j It:: lei r/IJ,
DRILL HOLES •
Eoat End of Dam: Depth-53ft.
Material-Alluvium for entire depth,
Eo at Bonk of Creek: Depth-40ft.
Materlai-0'·32'AIIuvlum ot 32'Hardpan
vtaclol till still present at bottom of hole.
Weat End of Do m: Depth-50ft.
Materlai-Hordpan(boulder clay) for entire depth.
TEST PITS e
Weat Sldt of Lake oppoaite Camp
Eltv. 16001t.(opproa.)
I O ~Block oill 8 rooto 2.o cJG,.,-silt with alidtrock
Silt with slidtrock
::~ • • • Clarey sill with slidl'roek
Eaat End Dom Axlo
8 "
1000
Glacial till
(boulder clay)
Estimated volume
2000
PLAN
SCA L E IN FEET
4000 4000
CO N TO UR INTERVAL SO O FEET
DATUM IS MEAN SEA L E VEL
FOREST
eooo
to creek level ---1+-1-t-rt
72,000c.y.
T.P. •
CRESC ENT
LAKE
,f Reclamation
DAM SITE
SCA L E : t•• 400'
CONTOUR INTERVAL tO FEET
DAT UM IS ME AN SEA LEVEL
10000
~
\'-\. '"":---Stream
·,\0 vl um
\\
APPROX MEAN
DECLINATION
19SI
1600
1500
,_ ...
~1400
~
z
0
j:
~1300 ....
...J ....
1200
2 8 24
--.....
I ~POoW ':146~
---/
/
v
/
1-
----
----
14 00 f.------·-·-· ·,
1300
12DD f.-----------
1100 1--------
900 1--
BOO -------···-----· ------------+--
600 -------
KEY PROFILE
SC ALE: Horir. 1•• 1000'
Ve rt. a••IOO'
AREA IN HUNDREDS OF ACRES
2 0 16
I---... -...._
k
/ v
Elevation Area
f tet ocrn
14SO 1324
1455 13 9 7
1460 1470
146S 1517
1470 IS6S
1475 16 12
1480 1660
12 8 4
~ ~
1---~ I "'-sTORAGE
!'----r:---.
-b ~ f-··-
Storoee abowt
oln .I4SOII. r'\. acre-feet
'\ 0
6 ,800
13,970
2 1,430
2 9,130
3 7,28S
4 5,440
0
r-----
\
t A Jb 0
.. n ~
-.,,., f'
CITY OF SEWARD
CRESCENT LAKE
I I I I I L
40 11000 8 0 120 16 0 200 2 4 0 2 8 0 HYDROELECTRIC PROJECT
STORAGE I N THOUSANDS OF ACRE-FEET
STORAGE AREA CURVE
CARTER LAf<E
/' ..... /S~v I4~L-----;;,..:::..-------
...
0::
/
/
"' ~I ~ ,J
::_/
---
LAf'<E
'teJU11" Ei<:v. '-<!C-."
jo;f'lled rtx:k.
Prtif(}trmahfly Grtywa:.~t:
Jot', ted Bel rae ,k
B.c. ,-.?eel
hcd~:
-"""' 3rav(./ ---u--.
S:.o/s c Jed rock_ I
1s;-oo
"" .._
PROFILE TIIROUGJ.Il#TAK£ C/14/I#EL </PENSTOCK
ml!d/vm
/nixed .ranc1>
fo or bc-IQH 6vtror: .:;~n c.1
..:vrrovnd/n,:r (dr:"'cr LuAc:. our,-r;, .. ¢
SCALE' Horlz.. !" ..
Vert !' •
J1 ~
s~ttc~
Prulotn Grey WclCke
0
I, TP?J '-. a.,._ __ TeJf #4/
3,../.Fq/l.s
0
lnfak:. End u . .r Chanr~O.
/!I
PLAN
INTAK£ CIIANN£L f PENSTOCK FROM CARTER LAt£
SCALE' 200'
21"'"-
< c
a .. t>G . .
c_.;_::.;....<-----~0._1_/_• --
~-~-f~O
' ',, -No.JJ' f>'Qba61y .,r.?raye/ ftJ
Ya~'yl~ ct~.D fh (ln<fer/.:Jin
by boulder
/Johun: c!
Jqoo
CARTER LAX£
P~J<nf £lev. /185
--~'---
-------'"'--------------
-~~QO -· _ _!_f! __ o ____ _
PFIOFIL E THROUGH CHANNEL /3ETkUN LAKES
S _AL£· Hcr/z JM•200'
L • Yut. !"• 40'
Elev. 14
Ma.x. Waf-er Elev. /465--
14SS___..-
CROSS SECTION THROUGH LAKE CHANNEL
./GOcfJ
4.of,Ps.
/(()Sea.. fe
ll'i!
tl/
CF<.OSS SECTION Tr80UGH INTAKE CHANNEL
Jf2
"::." 160 (;f$
2 0 {ps
No Sc.ale
TEST PITS
#3
J"idc. hill cvt
dboYc. cal!l<
8<->inK cut
atJu¥', 1111~
_fl<~J'fe? -{(~"-1-r""-1 0-7'~~1! Jilf ¢ !?oon
,,,
1'4
/lr H ihi:r;;; r"G/(. c ·~ <?·6 ~ 8/c/y. Ci~.~~. f;"'~;., .. Fmt-t,.
h/calht-rl!.d Gr~~Mt=~-~ ~,;:7:_;{ )
6tc/roc.J.1 app'ly '"'
/'I.-e:
#S
INI"ORMAT!ON BY ~1~Hfx;;L.~R~.;~zcy)
GOVC/?NMLNT f)ATA
CITY OF SEWARD
CRESCENT LAKE
HYDRO ELECTRIC PROJECT
LAKE 8 INTAKE CHANNELS
ENGINEERS SEATTLE
\
~
\1)
\
0
~
"q'
\ \
0 0 co ..... ...r '<t --
i ,l
/ J
1
1
1
1
1
1 1 1~' .5/uice Pip~ I~ I
I I I
1'11 :A' I' r .,-.W&IX. ,,
1!1
"' :II
' I
II it-")
;J' Sluice G::D
I i
ltre~m Bee/'
-.,.!
!
PLAN
Scale:!"-40'
290'
-3'Ga.hd Sluice
1
~
/
lmperviouJ Blanke/
//
/
I
/'
//
/
Dam Cre.sf £/eY. 1470
Or(Ji'n.rJ / Ground af Dam Axls
SECTION LOOKING DO WNSTREAM
Sca l e. : !"= 40 '-0 ''
/ lmperviou.s BlanA~f,
8' M ax., 2' Mln.
~
PLATE NO .IO
R;;,o~~P
LONC!TUDINAL SECTION
S ea l ~ : !"= 20'
PRELIMINARY SKETCH FOR
ESTIMATINC PI/RPOSES ONLY
CITY OF SEWARD
CRESCENT LAKE PROJECT
CRESCENT LAKE DAM
By J . H. T. Dote NOV. 1954
Scale AS SHQWN Sheet of
H.T. HARSTAD a ASSOCIATES
ENGINEERS-SEATTLE
' . . . {111111 r 111 r r r r r 11 r r lr , r , , , , , , , , , , , , , , , r r r , ~ • • 1
~ 1600':t to lake lnfak, 600 't -fo Day Li.9hf ~
i I I t I I I I I I I I
•
£lev. t_,.ss ·~ ' ~ ~ F low 8" Pa vl!mtYd -1-o Sfillin!l Pool Sl/'11/'n!l Spillw«y Chann~l t::;
'...:. Pool J ' 8~1ow P~n.s~oc.k 1 ' Spillway Weir Wall, £/I!V. 1465'r Channel
mh~ ~ ~ • £I e v. 14 S 5~ ~T:~r~a~l~),;;~,~~W.=4t::l.;=;=:===~---l
Channel 60" Pen,~ck __ _
I I I l I
I I lnra.ke Ho/sl I I II '
1
Sfoplo_g Slof • I I I
I l i
I \ ~
~
l 1 i l' i' i_Lllll I I I l I I I ~· ._.
PLAN
SCAL£:t''.,co'
£/ev. 14 7T't
2J2.'x.J'S!u/ce .
gafes, sfa!J!Jt!red
6'x6'
/nfakt!
gafe
lnfake Deck
Ele v. 1470'
r sfock frash racx
I I s~o· I ~ 7~o" ~ t---i's~.z . .. '8
SECTION LOOKING DOWNSTREAM
SCALE :!"" /o'
---
FloH
' '
Tramin.9 Wall
"-Slillin9 Pool / , ______ /
LO NG I TUDINAL 5£CT/ON
SCAL£: !"=to'
I
I
\
\
PLATE NO.II
.IY'
PRELIMINARY SKETCH FOR
ESTIMATING Pl.II?POSES ONLY
CITY OF SEWARD
CRESCENT LAKE PROJECT
INTAKE STRUCTURE 8 SPILLWAY
By K.T. Dote NOV. 1954
Scale AS SHOWN Sheet of
H.T. HARSTAD a ASSOCIATES
ENGINEERS-SEATTLE
8
Topograpy and Geology
Topographic maps of the project area were secured from the U. S. Corps
of Engineers and tha U. S. Geological Survey. These maps are to the
scale of 1 inch equal to 63,360 feet and 1 inch equal to 62,500 feet
with 100 feet contour intervals. In addi.tion, the U. S. Geological
Survey has prepared a large scale map of Crescent Lake and the proposed
dam site drawn to scales of 1 inch to 2,000 feet and 1 inch to 400 feet
with 10 feet contour intervals. Finally, a stadia traverse was made
by this firm which covered the area from the proposed intake at Carter
Lake to the power plant site at Upper Trail Lake. This topographic
information servGd as an adequate basis for the preliminary investigation.
Hov;evar, for detailed project design, careful topography in the vicinity
of the proposed structures will be required.
Preliminary geological data was secured from the u. S. Bureau of
Reclamation t.est holes at the dam site and at a point bet~-1een Crescent
and Carter Lakes, and from test pits dug by our crew. Su:c:>plemental
data was obtained through observation by Mr. John M. McAnerney,
Engineering Geologist, .Mr. Howard T. Harstad and Mr. Robert Simons
of Ho't-1ard 'r a Harstad and Associates. Geological interpretation and
appraisal was by John N. McAnerney with the concurrence of
Howard T. Harstad. Part of this information is presented on the
preliminary drawings of the dam and channels included in this report.
The hills surrounding Carter Lake and along the proposed intake
channel and penstock line are glacial moraines consisting of very
coarse unconsolidated material. The formation includes medium to
very large boulders wixed with sandy clay. The test pits showed a
thin top layer of silt followed by the before described boulder
material based on deeply jointed bedrock which is predominatly
graywacke. The bedrock appears to be below the grade of the channel
and penstock.
The m~terial between the lakes consists of a top stratumof gravel on
top of glacial till or bould8r clay. The Bureau of Reclarrt:-.tion d::.:ill
h:::J.s struck bedrock at elevation 1,417 or about f:JJ feet below the
ctl.:.."'f,~ce.
At the damsite the predominant formation is alluvial gravel. Test
pits were dug to a depth of 9 feet and indicated alternating layers
of clayey silt, medium gravel, and silt with slide rock. Dr:Ul
holes on the da~ axis showed alluvium to a depth of 53 feet at the
east end of the dam, hs.rdpan or boulder clay to a depth of SO feet
at the v;est end of the dam and 32 feet of alluvium follm-Ied by 8
feet of hardpan on the dam axis right at the creek.
A test pit at the power plant site produced alternating layers of
silt and slide rock. Further exploration is indicated prior to
es·;~ablishing the final location of the power house.
Additional geological data will be required for the detailed project
plan and design.
9
Hydrology
Crescent Lake is located about 30 miles north of the city of Seward
at a mean elevation of 1,454 feet above sea level. The lake has a
surface area of 1,380 acres and is fed by several small streams which
drain an area of 21 sq~re miles, ranging in elevation from lake level
to elevation 5,350,
A small unnamed lake is located 3,000 feet north of Crescent Lake and
is referred to as Carter Lake in this report. This body of water has
a surface area of 62 acres at elevation 1,485. The two lakes will be
joined by an open cut channel and the intake to the proposed power
plant will be north of the Carter Lake outlet. For practical purposes,
Carter Lake may be considered an arm of Crescent Lake,
Crescent Lake supplies the main storage volume, The lake discharges
from its western outlet through Crescent Creek to Kenai Lake at
elevation 436. The U. s. Geological Survey maintains a gaging station
on Crescent Creek about 5-1/2 miles downstream of Crescent Lake near
the Sterling Highway. Gage readings and discharge records have been
kept since July 1949 as shown in the attached tabulation, The drainage
area at the gaging station and the flow at that point is greater than
the flow llhich is available for Crescent Lake alone. This deficiency
is offset, hm·1ever, by the addition of Carter Lake which has an estimated
mean disch~rge of 18 cubic feet per second, For this reason, it has
been assumed in th~ project plan that the discharge records at the
gaging station apply to Crescent and Carter Lakes,
Plate No. 12 presents the average monthly discharge for the dry year
of 1~51 and all storage calculations have been based on this period
which is least favorable for storage purposes. Complete stream flow
data are available for only 4 years and are shown on the tabulations
following this chapter, Information on rainfall, however, which is
directly related to stream flow data, has been gathered since 1909 and
the U. S. Geolo;;icaJ. Survey states that the year 1951 represents perhaps
the rr.ost adverse year for a l-7ater power system, due to the low rainfall
and its distribution over the year. The annual precipitation at Seward
from 1909 to 19)2 i3 tabulated following this section,
The record shows that discharge is lowest during the winter months
from December to April, This period represents the storage draft or
storage ~elease season in contrast to all other months which are the
storage refill season. With the melting of the snow pack during late
spring and summer, the discharge reaches a peak during early July.
Flash floods have not been experienced during the recorded period,
due to natural regulation by the storage in Crescent Lake. The
highest momentary discharge occurred at 1:00 A.M. on June 28, 1953
and reached a peak of 820 cubic feet per second, Minimum discharge
of 12 cubic feet per second took place during April 1950. The annual
run-off varied from a low of 36,680 acre feet in 1952 to a high of
90,210 acre feet in 1953, and the minimum and maximum average annual
flow was 50.5 cubic feet per second in 1952 and 125 cubic feet per
second in 1953.
A flow duration curve, Plate No, 13, has been prepared which shows the
percentage of time during which a certain flow was maintained. For
the recorded year it shows that the flow was greater than 12 cubic feet
10
per second for 100% of the time and greater than 35 cubic feet per second
for SO% of the year.
The same plate shol~s a weekly hydrograph indicating peak discharges.
Plate No. liD in this report presents a Mass Discharge Curve which is a
cumulative record of flow for the known period and which is useful for
storage design and computation.
Due to the comparatively short period ofstream recordings, it has not been
attempted to compt'.te the maximum probable flood for any number of years.
However, the spillw~ has been tentatively designed for a maximum flood of
2,000 cubic feet per second which appears adequate considering the known
flood records and the great storage afforded by Crescent Lake.
From the monthly qydrograph, it is apparent that the required storage
during the dr,y months is 4,100 acre feet for one unit at average load
conditions. This amount of storage will draw the lake level down
approximately 3 feet. The project and the dam have been designed for
a high water level of 1,465 and a low water level of 1,455, allowing
10 feet of drawdown.
The brief flo~ records available do not provide adequate data to accurate-
ly predict results from the proposed ultimate development of 10,$00 KW.
The data is, however, adoquate to completely assure the success of the
first unit of 3500 KW and leaves only a question of required storage
capacity for the second 3500 KW unit. The 2800 KW of diesel power on
standby at Seward will permit a much higher water utilization at Crescent
Lake then would be possible with hydro power only.
Table No. 2
CRESCENT CREEK, MONTHLY RUN-OFF AT COOPER LANDING
Drainage Area -29.6 Sq. Mi,
Month 1949 1950 1951 1952 1953
cfs, A.F. cfs. A.F. cfs. A.F. cfs. A.F. cfs. A.F.
October 69.7 5520 48.5 2980 58 3560 156 9610
November 109 6480 28.0 1670 44 2620 168 9980
December 59.5 3360 18.5 1140 18.9 1130 71 4360
January 29.9 1840 16.5 1010 13.5 768 34 2090
Fe'.truary 16.8 932 14.5 807 12 690 41.6 2310
March 14.4 883 12.0 738 12 736 29.9 1840
April 15.2 906 20.0 1190 10.5 625 27.2 1620
May 46.7 2870 66.2 4070 33 2040 121 7420
June 148 8800 120 7140 132 7860 359 21370
July 152 5130 111 6800 103 6330 126 7760 270 16580
August 102 6260 63.5 3900 59.8 3680 81.9 5040 122 7500
September 101 5990 117 6970 118 7000 64.7 3850 93 5530
Annual
Run-off,
A.F. -----49,250 37,750 36,680 90,210
Max. and
Jilin.
Hourly 220 322 177 213 820
b5 12 -:L"" Disch. >
cfs.
Avera~e
Annual ----.. 68,0 52.1 50.5 125
Flow,
cfs.
Calendar
Year
1909
1910
1913
1914
1915
1916
1918
1919
1920
1921
1N1? .. ~ . .1"'-
1923
1924
1930
1931
1933
a -Pnrtly estimated
ANNUAL PRECIPITATION
RECORDED AT SEWARD, ALASKA
Precipitation Calendar
Inches Year
46.8 1934
38.8 1935
55.9 1936
61.0 1940
71.4 1941
73.2 1942
'(8.4 1943
59.2 1944
50.1 1945
61,0 1946
63.1 1947
85~6 1948
70.3 1949
66.9 1950
85.L 1951
50.1 1952
Table No. 3
Precipitation
Inches
93.0
73.9
65.9
92.1
78.5
66.4
91.5
79.4
71.4
54.5
64.0
58.4a
62.4
63.3a
49.1
86.2
.... -....
0
z
::> a:
-+--
--r---~
--··------
~-----
140--= ~-------t---
--
~
--
r----f--
----
r---
--f----
PLATE NO.I2
------=------
130 ~ ----·-==~---_!--___:: ____ ~-~-:~-=----=-----~:____ ----------~-----C----------------
F--_~:::_:__---------1=----:--_ _--------
f-----f-------
r----
120 f----
f--
1--
r---
1----
--t----
---~ ----------
--------
~ _----t--
--==~--------=~---------~-~f=------·---
------r-----------------t------
r-------
110 ---
--t----=------------::: __ -_-=-----------:_-__ f--__ -r----------
r--
f----
----------_: _ _--_-_ --r---::__:-----
t---
---r------~
-----------______ = ----
100~ --. -----r--· ---= --j----1
-----
r------
----t------
90 f--
-__ _--= ~ --~--___ r---1-----
~--c-:-__ ----~------
I---=~r-------t----=----:-=--
--f---------r----~ --
r----70~ r--:-:-.
-c--I==
-----_1---
eo__ __
~--
--_-
-
50 __
--
---==--40
30
20
---
1---
-__ 1---
---
---
---
F---
t-----
---
10 __
==---
----·-
~-----~~
----=---__ -
---
-t--
-= --
1----
--f=:
__ I--
r---
--!----
t-:-: __
---r---
--
---_----=== -_-----_------_----- -__ --
0
--f----
~----1----~--=== ------
--r----r----
-----
--------
--r------
1------
--f-------
----
i----
=#3e;~--
---__
r---
--t--------
----------r------------= t-=----
--t-------
JANUAIY FEIIUAIY IIAICM APIIIL MAY JUliE JULY AUIUST SEPTEIIIEI OCTOI(I •oYEIIHI Dt:CEIIHI
19__.5L__
CRESCENT CREEK. SEWARD
MONTHLY HYDROGRAPH 8
STORAGE REQUIRED
FOR DRYEST YEAR.
NOV. 1954.
Iii
f-.---···· --
!----· 140[,'@$--
120 g·_:::~= ---=···
--
----
····~--
90
~-eo f.---· ~
... --~-,-····-·· ::::::~
~=-·--.. -·.-·::: .... --
--~-: =-·-r:-:: --. ··I--·--
··----·--e1ft---~ 1---
r---. t------~ .... . ---·
······ ·-···· -·····
PLATE NO.I3
Iiili
----
--
r-----
.... ~
--1------~
-~--·.-==-
AUGUST SEPTEMBER OCTOBER
=·--·
NOVEMBER DECEMBER
C/f'£" SC£NT CH£'EK
Nt!'t!'Kiy N9o'ro9roph, W/rh
P'oks. (Flow Ourof1on
Curvt!'. l't:Jr a Pry Yt!-or.
Nov./354
--
-·-
.... ~
···-
PLATE N0.14
I.!)S() I.!J51
Basis:
PRELIMINARY ESTIMATE
CRESCENT LAKE HYDROELECTniC PROJECT
Manufacturers Preliminary Quotations
Actual Bids on Kenai River Highway
Actual Bids on Ketchikan Power Plant
Estimating Data, Alaska Road Comndssion
Estimating Data, u. s. Corps. of Engineers, Anchorage
Quantities from Design Sketches
Item Quantity Unit Price
A. Crescent Lake Dam
1. Clearing and Grubbing, Dam
and Reservoir Area
2. Care and Diversion of Water
During Construction
3. Gravel Fill
4. Impervious Blanket
5. Rip R~p in Place
6. 3' ¢Sluice Gate
7. 3 1 ¢Sluice Pipe
8. Log Boom &nd Walkway
9. Pouer Barge for Transportation
During Construction
Sub-Total Dam
B. Lake Channel
c.
l. Ex~avation, Common
2. Log Boom
Sub-Total Lake Channel
Intake
l. Lo~ Boom
2. Exc'lva·Lion, Conur..on
3· Reinforced Concrete,
Intake Structure
4. Reinforced Concrete, Training Wall
5. Sluice Gate, 2.5' x 3'
6. Intake Gate, 5' x 5 1
7. Trash Rack, Stop Logs,
Water Level Recorder
Sub-Total Intake
10 acres
2,500 c.y.
3,800 c.y.
400 c.y.
1
120 l.f.
1
1
61,200 c.y.
1
1
68,000 c.y.
45 c.y.
12 c.y.
2
1
~850
L.s.
2
3
20
L.S.
20
L.S.
L.S.
1.50
L.S,
L.S.
1.50
200
200
750
L.S.
L.S,
11
Amount
$ 8,500
10,000
5,000
11,400
8,ooo
1,500
2,400
2,500
25,000
$ 74, 30_.Q
91,800
1,000
~ 92.800
1,000
102,000
9,000
2,400
1,500
2,000
6,000
$12.3,900
12
Item Quantity Unit Price Amount
D. Spillway
1. EJ:]avation, Common 2,600 c.y. $ 2 $ 5,200
2. Excavation, Discharge Channel 11,100 c.y. 1.50 16,650
3. Reinforced Concrete, VJeir Wall 110 c.y. 180 19,800
4. Reinforced Concrete, Pavement 60 c.y. 150 9!000
Sub-Total Spillway $ 50,650
E. Penstock
1. 54 11 Pipe 84,000 lbs. .30 $ 25,200
2. 36" Pipe 218,000 lbs. .30 65,400
3. 30" Pipe 17,400 lbs. .30 5,220
4. 24 11 Pipe 130,600 lbs. .30 39,180
5. Dresser Couplings L.S. 20,000
6. Field Painting L.S. 10,000
7. Relief Valves L.S. 10,000
B. Excavation, Rock 12,000 c.y. 8 96,000
9. Excavation, Structural,
Anchor and Saddles 1,000 c.y. 25 25,000
10. Reinforced Concrete,
Anchor and Saddles 500 c.y. 180 90,000
Sub-Total Penstock $386,000
F. Power House
1. Clearing and Grubbing 4 acres 850 $ 3,400
2. Exc~vation, Structural 480 c.y. 25 12,000
3. Power Plant Structure 1 L.S. 60,000
4. 5,000 HP Turbine, Governor,
Intake Valve and miscl. 1 L.S. 95,000
5. 3500 KleJ' Generator and
mi~Jellaneous €lectrical 1
accessories L.S. 76,000
6. Srri tch g<?ar L.S. 40,000
7. Autometi·; Control Equipment L.s. 5,ooo
8. Electric 1rJir::.~g, Conduit and
Grounding System L.s. 25,000
9. 30-ton Travelling Crane 1 L.S. 25,000
10. Installing Equipment L.S. 20,000
Sub-Total PovJer House tt361,400
G. Transmitting Substation
L Excavati~n, Structural 50 c.y. 25 $ 1,250
2. Structure 1 L.S. 10,000
3. 3500 KVA Transformer, 2.3-69 KV 1 L.S. 25,000
4. 500 KVA Transformer, 2.3-7.2/12.5 KV 1 L.s. 4,000
5. Circuit Breaker, Insulators, etc. L.S. 15,000
6. Wiring, Conduit and Grounding System L.S. 7,500
7. Installing Equipment L.S. 7!500
Sub-Total Transmission Substation $ 70,250
Item Quantity
H. Receiving Substation
1. J!:xcavation, Structure
2. Structure
3. 3500 KVA Transformers, 69-2.3 KV
4. 500 KVA Transformers, 7.2/12.5-2.3 KV
5. Circuit Breaker, Insulators, etc.
6. Wiring, Conduit and Grounding System
7. Installing Equipment
Sub-Total Receiving Substation
I. Transmission
50 c.y.
1
1
1
Unit Price
$ 25
L.S.
L.S.
L.S.
L.s.
L.S.
L.S.
1. b3 KV Transmission Line 32 miles ~10,000
Sub-Total Transmission
J. Distribution
1. 7.2/12.5 KV Underbuilt 32 miles 3,000
2. Distribution Transformers,
Meters and Line Extensions 175 140
3. 7.2/12.5 KV Distribution Line 3.8 miles 3,300
4. Distribution Transformers and Meters 23 100
Sub-Total Distribution
K. Access Road 3 miles 20,000
L. Housing
M. Lands and Imorovements
TOTAL
10% Omissions and Contingencies
12% Supervision, Engineering, Inspection,
A::i:t;linistration and Legal
GRAND TOTAL
Use
L.S.
L.S.
13
Amount
$ 1,250
10,000
25,000
4,000
15,000
7,500
7,500
$70,250
$320,000
$320,000
~ 96,000
24,500
12,540
2,300
$135.340
$, 60,000
$ 26,000
$ 15,000
$1,785,890
178,590
$1,964,480
235,740
$2,200,220
$2,200,000
14
REVENUES AND EXPENSES ON PRESENT SYSTEM
Rates
Each municipality in Alaska has jurisdiction over its local public
utility rates. There is no Territorial regulatory official or agency,
in the sense of a State public service commission.
Rate schedules for the Seward Electric System now in effect were
initiated on June 10, 1946, by Ordinance No, 164, and are shown
on. the follow1ng' page:
A comparison of the Seward system residential rates with other
principal Alaskan cities follows:
Power Residential Bill for Monthly Use
System Supply 100 KWH 2SO KWH SOO KWH
Sei1ard Diesel $ 9.00 ~16.50 $29.00
Anchorage Hydro, steam
and diesel 6.93 14.68 25.93
Cordova Diesel 7.00 13.00 28.00
Fairbanks Steam and diesel 9.00 18.00 33.00
Juneau Hydro 5.00 11.38 22.00
Ketchikan Hydro 4.50 7.00 9.50
Nome Diesel 15.00 37.50 70.00
As Seward has a separate water heater rate of 2¢ a ~JH, the rate for
500 KWH would become $24.00 if the increment above 250 KWH was related
to this usage.
Schedule 11 A11 -Domestic
SEWARD ELECTRIC SYSTEM
Effective Rates Schedules
Ordinance No. 164 (Revised)
12¢ per KWH for first 40 KWH
7¢ per KWH for next 60 KWH
5¢ per KWH for all over 100 KWH
Min1mum charges to be $2.00 per month
Definition: One family dwelling used for a home only, Single phase
service for lighting, cooking, and single phase motors incidental to
domestic appliances. Demand load not to exceed five horsepower.
Schedule 11 B11 -Commercial
10¢ per KWH for first lCO KWH
8¢ per KWH for next 300 KWH
6¢ per KWH for next 500 KWH
5¢ per KWH for all over 900 KWH
Minimum charges to be $4.00 per month
Definition: Lighting, cooking, small appliances, motors not exceeding
five horsepower, in professional, mercantile, industrial and other
establishments not classed in Schedule 11 A.11
Schedule "C" -Power and Government
5¢ per KWH for all power
Minimum charges to be $1.00 per horsepower.
Definition: Minimum demand five horsepower. Minimum non-inductive
load 10 KW,
Off-Peak Power Load: Off-peak power load or bakeries who furnish a
time mechanism necessary to regulate load from 8 P.M. to 7 A.M.
4¢ per KWH for all power used
Minimum charges $10,00
Schedule 11 D11 -Hot Water Heaters
15
Hot water heaters, domestic (40 gals.)
Minimum rate $6.00 at 2¢ per KWH. Customer to furnish suitable time
switch so that heater does not operate between 7 A.M. -9 A.M., 11 A,M, -
Noon and 4 P.M. -7 P.M.
PASSED under suspension of tho rules this lOth day of June, 1946
Signed Thos. E. Howell, Ci4Y Clerk
APPROVED this lOth day of June 1946
16
Diesel Generation Production Costs
The Seward Electric System now obtains its entire power supply from a
diesel-electric generating station. There are no interconnections with
other S,Ystems. The present list of installed generating units follows:
Unit Date of No. of Capacity
No. Make Installation Cylinders RPM BHP 0.8 PF KW
No.
No.
No,
No.
No.
No.
No.
1 Worthington 1941 600 100
2 Worthington 1941 600 100
3 Worthington 1941 6oo 100
4 General Motors 1947 1,200 200
5 Fairbanks Morse,
Model 31, 2-cycle 1950 8 514 525 330
6 Cooper Bessemer,
Model 25, 4-cycle 1952 6 300 1,150 800
7 Cooper Bessemer,
Model 25, 4-cycle 1954 8 300 1 22-00
(Totals of 7) 2, 830
The power plant is located in the west side of town on the waterfront,
across the railroad tracks from the Standard Oil Company's dock. It
is favorably located with regard to the business district and commercial
power load,
Standard Oil Company of California maintains a large bulk oil storage
plant at Seward, which simplifies the fuel oil storage problem for the
city plant.
Production expenses are shown in Table No. 4.
Interest and amortization is figured on a 20-year basis on diesel units
as against 30 years on the hydro units because of the expected shorter
useful life of the diesel units.
SEWARD ELECTRIC SYSTEM
ANALYSIS OF DIESEL PO~ffiR PRODUCTION EXPENSES
1953 1952 1951 1950 1949
Production Expenses
Station Labor $ 39,172 $ 40,134 $ 38,230 $ 23,878 $ 18,345
Engine Fuel 56,651 48,105 44,337 31,166 27,480
Lubricants 1,476 2,134 2,450 2,582 1,946
Supplies and Expenses 1,347 7,621 2,583 2,107 1,657
Maintenance, Supervision and
Engineering 8,251 7,299
Maintenance, Generating and
Electrical Equipment 8,597 7,521 10,971 14,367 11,823
Total Production $115,494 $112,814 :~ 98,571 $ 74,100 $ 61~251.
KWH Generated
Total Generation 4,943,259 4,323,080 3, 682,305 2,557,556 2,150,903
Station Use 181,259 170,780 123,805 107,156 85,503
Net Generation 4,762,000 4,152,300 3,558,500 2,450,400 2,065,400
Per Cent Station Use 3-6% 3-9% 3-4% 4-2% 4.0%
Expenses Per Net KWH
Labor .82¢ ·97¢ 1.07¢ ·97¢ .89¢
Fuel 1.19 1.16 1.24 1.27 1.33
Lubricants and Supplies .06 .23 .14 .19 .17
Maintenance ·35 -36 .31 c. 59 -57
Sub-Total (cents per KWH) 2.42¢ 2.72¢ 2.76¢ 3.02¢ 2.96¢
Interest and Amortization at
4-3/4% 20 YP-ars
$165/kw, 25% Plant Factor~ -59 ·59 -59 -59 -59
8
Total Cost, ¢/KWH 3.01 3·31 3-35 3-61 3-55 ~
1-'
(!)
z
0 •
+:-
17
Historical Sales
The records of the municipal system show the following amounts for gross
operating revenues, from the sale of electric energy, energy sales and
customers served. Energy and customers records prior to 1949 are not
readily verified and unit comparisons are omitted.
Sales of
Electric KWH
Year Energy Sales -
1946 $ 81,185 1,417,685
1947 100,485 1,610,737
19h8 99,796 1,600,774
19h9 113,516 1,873,41.!2
1950 133,584 2,3"!-7,607
1951 191.!,234 3,293,076
1952 231,853 3,867.837
1953 262,465 4,388,445
Sales by Class of Consumer
Average
Customers
535
602
806
883
962
Unit Revenues
Per KWH Per
Sold Customer
6.06¢
5.76¢
5.93¢
5.98¢
5.98¢
$212
222
241
263
273
Revenues from the sale of electricity to the major customer classifies-
tiona are shown below for the five years 19h9 to 19$3, inclusive.
1953 1952 1951 1950 19h9
Residential $ 97,186 $ 91,717 $ 74,664 $52,796 $ 45,615
Commercial 85,196 78,945 62,347 45,365 36,71.!7
Municipal 10,745 7,132 6,709 5, 957 5,807
Government 5t~, 981 45,996 ul,971 22,211 19,617
Power lh2355 8206Q 8,540 7,254 52728
Total $262,465 $231,852 $194,234 $133,584 $113,515
Anallsis of 1953 Sales
An analysis of 1953 sales follows:
Revenues
KWH Per
. KWH Average per Cus-KWH Per
Revenues Sales Curstomers to mer Sold Customer
Residential $ 97,186 1,599,400 741 2,160 6.06¢ $131
Commercial 85,196 1,2oo,9h8 163 7,360 7.10¢ 522
Municipal 10,745 211.!,627 12 5.02¢
Government 54,981 1,083,106 27 5.06¢
Power 14 2355 290,388 19 15,250 4.96¢ 758
Total $262,1.!65 1.!,388,469 962 u,575 5.98¢ $273
18
As shown in the first text table of this section, energy sales in-
creased from 1,417,685 KWH in 1946 to 4,388,445 KWH in 1953. The
average annual rate of increase for the seven year period was about
20%.
Customer Data
Active services by months for the five years 1949 to 1953 are shown
in the following table:
1949 1950 1951 1952 1953 1954
January 507 561 766 841 935 1,015
February 519 841 935 1,018
March 526 587 779 841 932 1,021
April 524 595 800 846 930 1,.022
May 530 583 818 856 933 1,026
June 514 591 783 859 946 1;.034
July 526 598 814 865 957
August 528 594 799 917 967
September 537 597 818 918 981
October 566 598 842 9.31 996
November 569 605 840 935 1,012
Dec'3mber 580 750 841 942 1,022 1,100
Average 5.35 602 806 883 962 1,034
As domestic water heaters are metered separatelY, the,y appear as a
separate class of service with 97 customers at the end of the year
and 90 for the 1953 average. However, the separate water heater meters
have not been included in customer total figures,
Audit
Audited statements of operation for the five years 1949 to 1953,
inclusive, have been prepared by Beaver and Van Seventer, Certified
Public Accountants of Anchorage, Alaska. The auditors' reports call
attention to certain deficiencies in records and accounting procedures,
and their statements are strictly qualified by the explanations and
remarks contained in their reports. Of particular importance is the
lack of an adequate system and records for proper segregation of
capital and maintenance expenditures.
Subject to the above qualifications, the statement of operations for
the years 1949 to 1953, as prepared by the auditors, is shown in
Tables Has·. 5-A and 5-B following this page.
SEWABD ElECTRIC SYSTEM
Sewardz Alaska
COMPARl\.TIVE STATE}1ENT OF INCOME
Years 1949 -1953
As Prepared by Beaver and Van Seventer, Certified Public Accountants
Operating Revenues
Sale of Electric Energy
Residential Sales
Commercial Sales
~iunicipal Sales
Government Sales
Power Sales
Other Revenue
Customers' forfeited deposits & penalties
Servicing of customers' installations
Miscellaneous electric revenue
Ydscellaneous other income
Total
Less Operating Revenue Deductions
Station labor
Engine ruel
Lubricants
Supplies and expense
Maintenance, supervision and engineering
Maintenance, generating and electrical
Years ended December Jl,
1953 1952 1951 1950 1949
$ 97,186.23 $ 91,717-44 $ 74,664.83 G 52,796.53 $ 45,615.63
85,196.15 78,945.27 62,347.89 45,365.10 36, 747·34
10,745-35 7,132-55 6,709.45 5,957.14 5,807.07
54,981.71 45,996.65 41,971-50 22,211.29 19,617.40
14,355-75 8,060.65 8,540.60 7,254.10 5, 728 .. 51
$262,465.19 $231,852.56 $194,234.27 $133,584.16 $113,515.95
$ -$ 374.00 $ 3.00 $ -$
34.00 -6.00 .u 3.62 85-74 44-56 181.45
1,213.67
$ 1,248.08 $ 377-6~ $ 94.74 $ 44.56 $ 181.45
$263,713.27 $232,230-18 $194,329.01 $133,628.72 $113,697-40
$ 39,172.85 $ 40,134.62 $ 38,230o05 $ 23,878.81 $ 18,345.50
56,651.02 48,105.38 44,337 .. 66 31,166.01 27,480.94
1,476.69 2,134-47 2,450.48 2,582.29 1,946.48
1,347-36 7,621.99 2,583.66 2,107.03 1,657-70
8,251.80 7,299-90
equipment 8,596-61 6,521-39 10,971-36 14,367-32 11,823.99 1-3
lU Distribution operation of lines
Distribution operation of street lights
Distribution supplies and expenses
Maintenance of lines
Maintenance transformers and devices
46,645.69
143-43
897.24
17.01
27,731.16 -
52.98 -323-98 16,125-90
175-89 -
99-67 -
--a' --ti;'
4,363.24 4,835-97 :;;;:: 0 -• --\11.
J,.
SEWARD ElECTRIC SYSTE:H
Seward, Alaska
COl'.WARATIVE STI1TEPENT OF INCOl''lE
Years 1949-1953
As Prepared by Beaver and Van Seventer, Certified Public A~countants
Years ended December 31 2
Less Operating Revenue Deductions (Con't.) 1953 1952 1951
Garage expense $ 2.25 $ -$ -
Maintenance of grounds and landscaping 191-35
Truck maintenance 3,486.87 1,753-24 2,643.87
Rent 395.00 540.00 600.00
Salaries -Executive and office 11,217-50 10,503.13 10,637-04
General office supplies and expense 967.52 800.43 779.50
Professional services 864.05 877.20 2,702.76
Insurance 8,809.93 5,705.49 4,118.62
Injuries and damages 88.00
Maintenance general property 1,991-78
}liscellaneous general expense 294-36 662.56 1,143-80
Uncollectible accounts 2,660.82 830-49 868.86
Other incone and expense -111.10 855-42
Depreciation 21,443-49 _32,086 .. 50 16,739-60
Total $215,612.62 $185,071-57 ~;>156,388.58
Operating Income $ 48,100.65 $ 47,158.61 $ 37' 940.43
Add Non Operating Income
Rental Income $ 1,320.30 $ 607.88 $ -
Less repairs and other rental expense (125.30)
Profit on sale of equipment 725.00
$ 1,920.00 $ 607.88 ~-.;p -Deduct Non Operating Expense
Interest on bonded debt $ 13,854-20 $ 14,418.89 $ 13,415.13
Other interest expense 233-32 7-25 84.65
$_:L!:I.,087.52 $ 14,426.14 $ 13,499 .. 78
Net Income for the Pericd $ .3'5,933-13 $ 33,340.35 $ 24,440.65
1950 1949
$ -$
626.30 487.84
450.00
8,322.50 6,580.00
711.07 528.59
1,675.00 1,088.10
3,626.26 2, 283-30
6L1.41 620.59
751.00 253.56
11,849.06 10,363.15
$107,117.30 $ 88,295-71
$ 26,511.42 $ 25,401.69
$ -$
$ r'• -'ll> -t-3
~
$ 4,422.62 $ 2,513.27 ~ --~
$ 4,422.62 $ 2,513-27 •
\J'l.
$ 22,088.80 I $ 22, 888.42 tD
ESTIMATED OPERATING RESULTS WITH PROPOSED IMPROVEMENTS
1953 eperating Results
The following tabulation shows operating results of the present s.ystem
for the year 1953:
Average Customers: 962
KWH Sold: 4,388,445 a 4,560 KW/customers/yr,
19
Electric Revenue
$/1953
$262,465
¢/KWH
5.98
t I customers/yr
$273
Maintenance and Operating Expense
Production (Diesel Plant)
*Distribution
Commercial and General
Total Maintenance and
Operating Expense
Net Available for Bond Service
and Coverage
$115,494
51,188
24,815
$191,497
$ 70,968
2.63
1.17
1.62
$120
53
26
$199
$ 74
*Approximately $40,000 Capital Expense for Reconstruction and
Extension of the Distribution System is included in this item.
With this adjustment, 11 Net Available for Bond Service and
Coverage" is $111,000.
Expected Annual Operating Results with
Present Customers, plus Proposed
Extensions Utilizing Present Diesel Plant
The system has grown to a total of 1,100 customers for December 1954.
With the construction of a distribution line to the east shore of
Resurrection Bay and a distribution line along the proposed 69 KV
transmission line to Upper Trail Lake, an estimated 200 customers will
be added, resulting in not fb~-ror than 1, 300 customers upon completion
of the distribution s,ystem extensions. The following table shows
estimated operating results for 1,300 customers based upon the expanded
system and utilization of the present diesel electric generating
facility at Seward. The estimate is based upon the present rate schedule.
1. The Electric Revenue per KWH is estimated to decrease from 5.98¢
per KWH to 5. 95¢ per KWH.
2. Revenue/customer/yr is estimated to increase from $273 to $285, an
increase of $12, which represents the average increase in revenue
per customer per year over the 5-year period from 1949 to 1953.
3. Production Expense is estimated at 2.5¢ per KWH, a decrease of
approximately 5%. This decrease is based upon producing approx-
imately 50% more KWH's with the same operating crew.
4. Distribution Expense is estimated at $10/customer/yr. During 1951,
1952 and 1953 extensive reconstruction of the distribution s,ystem
was charged off to Operation and Maintenance. Prior to 1951, the
distribution expense was less than tlO/customr/yr and this figure
is considered conservative.
A comparison between the Seward operation and Operating Costs for
Municipal Systems of similar size in Wisconsin substantiates this
figure. The Public Service Commission of Wisconsin reports Main-
tenance and Operation Costs averaging $6.39 per customer per year
for the year 1951. Weather conditions would be comparable to
Sewar~and an adjustment to Alaska wages and costs would indicate
a figure slightly under $10 per customer per year.
Operation and Maintenance Expenses
20
Year Distribution
($/Yr/Customer)
Commercial
and General
($/Yr/Customer)
Total
($/Yr/Customer)
1949
1950
1951
1952
1953
1954
$ 9.95
8.30
24.05
34.20
53.20
$20.75
25.60
24.80
21.60
25.70
$30.70
33.90
48.85
55.8o
78.90
5. Commercial and General Expenses are estimated at $25/customer/yr.
This figure is slightly higher than the average Commercial and General
Expense for the system for the 5-year period ending in 1953. It is
expected that this figure will drop substantially as the s,ystem grows.
Annual Operating Results With 1,300 Customers
And Present Diesel Plant With Extensions to Distribution System
KWH Sold-L,785 IDJH/customer/yr
Per 1,300
Per KWH Customer Customers
¢ $Lyr $/yr
Electric Revenue 5.95¢ $285 $370,500
Maintenance and Operation Expense
Production Expense (Diesel) 2.50 119 155,480
Distribution Expense .21 10 13,000
Commercial and General .52 25 32,500
Total Maintenance and
Operation Expense 3.23¢ $154 $200,980
21
Available for Bond Service and Coverage 2.72¢ $130.40 $169,520
Bonds Which Can Be Supported at 1.5
Coverage
Outstanding Bonds, December 1954
Additional Bonds Which Can Be Supported
by System
• 169,5go
.09
.. $1,784,420
$ 483,000
$1,301,420
The difference between the Electric Revenue and the Maintenance and Operation
Expenses amounts to $169,520 for a one-year period. This amount is available
to pay interest and principal on the bonded indebtedness, for payment into
the reserve account and for extensions and betterments to the system. The
Bond Convenants require that rates be maintained which will provide coverage
of 1.50 or provide 1.50 times as much net revenue as will be required for
payment of bond interest and principal. The additional 50% is available for
bond reserves, extensions and betterments and to pay off bondsprior to their
maturity. The existing bond indebtedness bears an interest rate of 4-3/4%.
Us~ng a 30-year level payment for bond interest and principal, the annual
requirement is $63.30 per $1,000 bond.
The coverage requirement of 1.50 results in a requirement of $95/yr net
revenue per $1,000 bond. Based on the above conditions, $169,520 of annual
net revenue will permit the utility to issue a total of approximately
$1,784,000 bonds, including the present bonds outstanding. The following
bonds are presently outstanding against the system:
Electric Revenue
Existing Bond Issue
$104,000
$200,000
$200,000
1950
1951
1954
Bonds Outstanding
4 .. 3/4%
4-3/4%
4-3/4%
Total
$ 93,000
190,000
2oo,ooo
$483,000
Accordingly, under existing bond covenants, the utility can issue
$1,301,000 of new bonds at this time for the proposed extension of
the Distribution System and for other improvements,
22
Expected Annual Operating Results With f.uoo Customers ·and Crescent Lake Hydro
With the construction of the Crescent Lake hydro plant, the Production
Expense for power will be greatly decreased. The following table shows
the operating results to be expected with the addition of the nydro
generating facilities to the expanded system:
KWH SOLD-6,700,000 e 4,785· KWH/customer/yr
Electric Revenue
Maintenance and 0 eration Expense
Production Expense Hydro
Distribution Expense
Commercial and General Expense
Total Maintenance and
Operation Expense
Net Available for Bond Service
and Coverage
Bonds Which Can Be Supported
at 1.5 Coverage
Outstanding Bonds, December 1954
Additional Bonds Which Can Be
Supported by Hydro System
Per KWH
¢
$.9$¢
.42
.21
.52
1.15¢
4.80
322,000
• 095
Per 1,400
Customer Customers
t/yr $/yr
$285 ~399,000
20 28,000
10 14,000
__2 35,000
$ 55 $ 77,000
f230 $322,000
.. $3,390,000
$ 483,000
$2,907,000
The above tabulation shows $3,390,000 net available for bond service
and coverage. Based upon the annual net income requirement of ~95 per
$1,000 bonds as described in the previous paragraph, a total of
$2,907,000 bonds can be safely sold to finance the nydroelectric
plant, sub-stations, transmission lines, extensions to the distribution
system and other necessary improvements.
23
Operating Results for Hydro Generating Plant, only (No Transmission)
The following Table shows the estimated operating results of the Hydro Plant
for one, two and three units of 3500 KW each,
Cost per unit
Cumulative capacity
Cumulative cost
*Interest and Principal
Maintenance and Operation
Total Annual Cost
Unit 1
$1,550,000
3,500 KW
$1,550,000
Annual Cost
$ 98,000
28,000
$126,000
Unit 2
$ 820,000
7,000 KW
$2,370,000
$150,000
42,000
$192,000
Electric Energy at 50% of Installed Capacity
Annual KWH 15,3 Million 30.7 Million
Power Cost ¢/Kl.VH o. 822¢ 0,626¢
*4-3/4% -30-year Bond -Interest and Principal = 6.33%/year
Unit 3
$ 920,000
10,)00 KW
$3,290,000
$208,000
56,000
$264,000
46 Million
0 • .574¢
The initial unit can be placed in service by the end of 1956 with an estimated
annual load of 7,700,000 KWH, or an average load vs. Plant Capacity of 25% and
a Power Cost of 1.644¢/KWH. When the initial unit is loaded up to 50%, the
Power Cost will drop to 0.822¢/KWH and will drop further to 0.574¢/KWH for
3 units. With three units it may be necessar,y to operate the Diesel Plant on
rare occasions preceded by two to three years of low rainfall. Further stream
flow data will be necessary to properly evaluate the possibility.
In order to determine required wholesale power rates, the cost of transmission
to the load, together with receiving substation, must be added and an allowance
must be added for Bond Coverag~which will include the cost of expansion of the
facilities and a suitable factor of safety to allow for unforeseen economic or
physical conditions,
24
TRANSMISSION TO KENAI JUNCTION
In view of the greatly decreased unit power cost for higher load on the
proposed Crescent Lake HYdro Plant, there is a substantial advantage to
Seward in serving additional loads. There is a substantial power load now
being supplied by diesel generation at the Kenai militar.y installations,
at the village of Kenai and in the Horner area. The Homer REA System has
recently been extended to Clam Gulch at 14.4/25 KV and this line could be
extended to Kenai Junction at modest expense.
72 miles of 69 KV transmission and a 1,000 KW substation at Kenai can be
constructed at a cost of approximately $950,000. It is probable that
power contracts could be negotiated for wholesale power at Kenai Junction
which would be of advantage to the City of Seward as well as to the
prospective wholesale customers.
ESTIMATED ANNUAL COST OF TRANSMISSION LINE AND SUBSTATION
Estimated Construction Cost
Principal and Interest at 4·3/4% 30-year Bonds
Maintenance and Operation
Total
$950,000
60,100
7' 900
$ 68,000/year
ESTIMA.TED COSTS AND RATES FOR PCMER AT KENAI JUNCTION
4.4 ~fillion KWH/yr 8.8 Million 10 Million
(1,000 KW, 50% LF) KWHLyr KWH/yr
Transmission Cost,¢/KWH 1.55¢ 0.77¢ 0.68¢
Generating Cost, ¢/KWH 1.26 0.82 0.72
Cost ¢/KWH 2.81¢ 1.59¢ 1.40¢
Bond Coverage for
Reserves and
Improvements, ¢/KWH 1.12 0.64 0.56
Wholesale Price ¢./KWH 3.93¢ 2.23¢ 1.96¢
25
The prospective load at Kenai Junction based upon existing customers or
requested service is:
Homer REA
Present Customers and those with
connections under construction
Homer REA
Diesel Plant at Soldatna
Homer REA
Additional Service requested
by Federal government in
vicinity of Homer
Naptown and Connecting Line
Kenai
Alaska Road Commission
Shopsto be constructed
at Soldatna
C.A.A. -Kenai
U. s. Army
Wildwood Station at Kenai
Expected Addition to U. S. Army,
Wildwood Load
Total
Number
Services
425
(actual)
45
(actual)
l
(;fJ
150
l
l
l
l
Estinated
Peak KW
320
34
400
45
113
15
50
aoo
_jQQ
2,137 KW
Estimated
KWH/yr
1,300,000
134,000
2,500,000
171,000
L45,ooo
300,000
231,000
(actual)
4,ooo,ooo
1,700,000
10,787,000
KWH/yr
1. Homer REA has expressed an active interest in purchasing power at Kenai
Junction to serve their entire load, provided coats are less than that of
adding units to their present diesel plant and operating this plant. They
are also willing and able to extend their distribution system to Soldatna,
Naptown and Kenai as soon as adequate power supply is available, There is
also a request for an additional new load of approximately 400 KW for a
new army installation.
2. The Alaska Road Commission is about to construct shops at Soldatna and
they have requested electric service from Homer REA.
3. The CivilAeronauticsAdministration has a diesel plant at Kenai which
produced 231,000 KWH in 1953. Their policy is to b~ power from a
public system where available. The Regional Office at Anchorage has
stated that they will shut down their plant and purchase power from
Seward or wherever else it ~ be available as soon as a public s,ystem
is available.
26
4. The U. S. Ar~ speaking through the Utilities Section of_ Headquarters,
U. S. Ar~, Alaska has expressed a lack of interest in a public power
supply. It is our opinion, however, that a public power supply would
be cheaper ahd more dependable than their present diesel plant and that
the position presently expressed by the Ar~ is contrary to Armr policy
and will be reversed, It is our understanding that the Wildwood
installation is about to add additional equipment which will raise their
power load approximately 200 KW.
27
CONCLUSIONS AND RECOMMENDATIONS
Conclusions
1. The proposed Crescent Lake Hydro Project, First Stage, can be con·
structed for an estimated total cost of $2,200,000.
2. It appears that $2,600,000 of additional bonds could be justified
for the construction of this project at ti1is time under the
covenants of the existing Seward Electric Revenue Bonds with a
coverage of 1.50. Further growth in prospective load will increase
this figure.
3. The project appears to be feasible from a physical and economic
standpoint.
4. Construction of a transmission line to Kenai Junction will be
advantageous to the City of Seward and the Kenai Peninsula if
sufficient firm power contracts can be had to justify the
expenditure,
Recommendations
1. The City of Seward should proceed toward construction of the
3500 KW First Stage of the proposed Crescent Lake Hydro Project,
at an estimated cost of $2,200,000.
2. Negotiations should be had with the several prospective wholesale
power users at Kenai Junction to determine whether or not it is
to the advantage of the City of Seward to construct a transmission
line to that location.
3. Electric Revenue Bonds in an amount not to exceed $3,500,000 should
be authorized to finance the Hydro Project, and to finance the
Kenai Junction Transmission Line at such time as the line proves
financially feasible,
4. The financing of the project should be studied by qualified
investment bankers with a view toward working out a financing
program and obtaining a commitment for purchase of bonds,
5. At such time as the necessar.r Revenue Bonds are voted and a
commitment is obtained for purchase of the bonds, the following
work should be authorized for 1955:
a. Construction of the power line to the nydro site at Mile 32
Upper Trail Lake.
b. Construction of an access road to Carter and Crescent Lakes.
c. Test pits, drilling and other subsurface exploration for the
project,
d. Preparation of designs, plans and specifications for the project.
e. Call for bids on the turbines, generators, and other principal
equipment.