Electrical Power for Valdez and the Copper River Basin-1981

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APPENDIX AHYDROLOGYTABLE OF CONTENTSItemINTRODUCTIONCL rr~ATETemperaturePrecipitationSnowWindStormsSTREAMFLOWExtension of Streamflow RecordsEstimated Damsite StreamflowsEvaporationFlood CharacteristicsPast FloodsFlood FrequenciesProbable Maximum FloodESTIMATED MONTLY STREAMFLOWSLowe River and Solomon Gulch (Table A-l)Klutina River (Table A-2)Tonsina River (Table A-3)Power Creek (Table A-4)Allison Creek (Table A-5)ALLISON LAKE - RESERVOIR REGULATION (Figure A-l)PageA-lA-lA-5A-10A-15
I NTRODUCTI ONThe area considered for possible hydroelectric alternatives includedthe coastal area around Valdez, the Chugach Mountains, and portions ofthe Copper River Basin. This area corresponds roughly to the servicearea bf Copper Valley Electric Association, over whose powerlines theelectricity from any potential hydropower development would betransmi tted.This appendix describes the climate of the study area and thestreamflows derived for the five sites considered as hydropoweralternatives. These sites include Allison Lake, Tsina River, TiekelRiver, Tonsina River, and Klutina River. They are shown on the basinlocation map, Figurp 1 page 24 of the main report. The final page ofthis appendix is a plate which portrays reservoir regulation, includingestimated lake elevations, regulated and unregulated streamflows, as wellas firm and secondary energy for the favored development at AllisonLake. This was done on a monthly hasis for the years 1948 to 1977.CLIMATEThere is a wide variation in climate throughout the study area. Theregion adjacent to the coast is under maritime influence, with highprecipitation and relatively mild temperatures. The interior area hasmore of a continental climate, with extreme temperatures and lessprecipitation. Between these two areas is a mountainous transitionregion whose climate is a hydbrid of maritime and continentalconditions.Valrlez, the primary load center of the coastal region, is located ona well sheltered extension of Prince William Sound. Snowcapped mountainscontaini~g extensiv~ glacier areas surround Valdez on three sides, withrugged but unglaciated mountains to the south and southwest. Activeglaciers extend t~ within 5 to 10 miles of old Valdez to the north andreach down to the level of the glacial plain on which old Valdez islocated. This level glacial plain is a well forested area except for thetidal marshes south~/est and the glacial drainage area to the east. Theterrain surrounding Valdez exerts a pronounced influence on practicallyall aspects of the local weather and climate. The sheltering effects ofsurrounding mountains channel local winds into two distinct channels.From October through April prevailing winds are from the northeast; fromMay through September prevailing winds are from the southwest.Precipitation is abundant year-round, but builds up noticeably during thelate summer and fall. The heaviest precipitation usually occurs inSeptember and October; almost 25 percent of the total annual rainfalloccurs in these 2 months. Snowfall during the winter months is veryheavy. There is considerable cloudiness during the entire year, butslightly less tha~ is realized at Alaskan points farther southeast.About 1 day in 6 can be classified as clear. Although the high mountainridges to the north provide considerable barrier to the flow of coldcontinental air from the interior during the winter months, there is adefinite off setting factor in the downslope drainage from the highA-l
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E---~for-~-~and the Copper River B-
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SYLLABUSThe geographic area conside
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SOUTHCENTRAL RAILBELT AREA. ALASKAI
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INTRODUCTIONDue to continued growth
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The city of Valdez conducted enviro
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FIGURE I:HYDROPOWER STUDY AREAFOR V
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oard feet of hardwoods, half of whi
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VALDEZ
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ALYESKA PIPELINE TERMINAL
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Other Activities:Nonseasonal stable
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Table 3Historical Population of Val
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Transportation and Tourism:Detailed
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The following tables show the futur
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framework of the study authority an
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Nucl ear:Nuclear energy development
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lntertie:With the deciSlon by the C
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If the powerhouse were moved to jus
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CONSERVATION:Description:THE NONSTR
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TRANSMISSION INTERTIEDescription_:T
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impaired. As a result, standoy gene
Page 42 and 43: ALLISON LAKE
Page 44 and 45: From the time of pO\'Ier-on-line, o
Page 46 and 47: Technical services such as electron
Page 48 and 49: 175150FIGURE: 2ENERGY DEMAND - REVI
Page 50 and 51: 175150FIGURE: 4ENERGY - REVISED APA
Page 52 and 53: SYSTEMOF ACCOUNTSAccountsPlan AAll
Page 54 and 55: AccountsPlan A.All Diesel Generatio
Page 56 and 57: then be determined for the 100-year
Page 58 and 59: Comnents received from the city of
Page 60 and 61: FINALENVIRONMENTAL IMPACT STATEMENT
Page 62 and 63: LIST OF PRFPARERSNameExpert i seExp
Page 64 and 65: COMPARATIVE IMPACTS OF ALTERNATIVES
Page 66 and 67: AREAS OF CONTROVERSYTo date no spec
Page 68 and 69: COVER SHEETLIST OF PREPARERSFINAL E
Page 70 and 71: A. NEED FOR AND OBJECTIVES OF ACTIO
Page 72 and 73: alternative has been estimated to p
Page 74 and 75: slopes surrounding Allisorl Lake ar
Page 76 and 77: weir to the mouth, with the majorit
Page 78 and 79: expected to Allison Creek below All
Page 80 and 81: 2. Biologicala. Vegetation:,r-.Hydr
Page 82 and 83: Waterfowl and water related birds f
Page 84 and 85: within the local community. The imp
Page 86 and 87: Cumulative impacts to the Port Vald
Page 88 and 89: Program-related issues. The Alaska
Page 90 and 91: 13.10INDEXSubjectsAffected Environm
Page 94 and 95: snowfields and glacier areas on the
Page 96 and 97: AVERAGE MONTHLY PRECIPITATION(inche
Page 98 and 99: gages at Lowe River near Valdez, Lo
Page 100 and 101: were estimated based on Tonsina Riv
Page 102 and 103: 'fUR r)c r ,-. n:c JA~ FEEl "'A~ AP
Page 104 and 105: --..,I-J--. -,-- - ----- - --TONS I
Page 106 and 107: ALLISON CREEKESTIMATED STREAMFLOW -
Page 108 and 109: APPENDIX BEXISTING SYSTEM ANDFUTURE
Page 110 and 111: IIHf{ODUCTIONThis section is devote
Page 112 and 113: FIGURE: B-1PRICE INCREASES OF DIESE
Page 114 and 115: Installed Generat.or Peak Energy fo
Page 116 and 117: 90008000700060005000- 4000 ~..-:300
Page 118 and 119: Table 4VALDEZ-GLENNALLEN AREA UTILI
Page 120 and 121: As footnoted, the Alaska Power Admi
Page 122 and 123: 201510CDI5.: ...:.T. .' !', ~. '.,
Page 124 and 125: SOLOMON HY I.IICU'-__'lOUIE 1-7 MlN
Page 126 and 127: , .. ,·.AYI.AG! fOWl. DlMANO WHit,
Page 128 and 129: The following is an excerpt from th
Page 130 and 131: Power Requirement Study (excerpt)GL
Page 132 and 133: APPENDIX CECONOMIC EVALUATION
Page 134 and 135: INTRODUCTIONThe purpose of this sec
Page 136 and 137: value of 66.92 mills/kWh. This figu
Page 138 and 139: FIGURE C-2: SOLOMON GULCH ALLISON L
Page 140 and 141: Er.Jployment Benefits Computation (
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energy would be fully utilized. As
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ECONOMIC EVALUATION OF HYDROPONER M
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ECONOMIC EV~LUATION OF HYDROPO~ER M
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------~-~ECONO~IC EVALUATION OF HYD
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ECONOMIC EVALUATION OF HYDROPO~ER M
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ECONO~IC EVALUATION OF HYDROPOwER M
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APPENDI X DPROJECT DESCRIPTION AND
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POWERHOUSETypeTRANSMISSION LINEVolt
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POWERHOUSETypeTRANSMISSION LINEVolt
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VALDEZ HYDROELECTRIC POWER PROJECTG
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turbine. The penstock would bifurca
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TABLE D-lSUMMARY COST ESTIMATEOCTOB
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TABLE 0-3DETAILED COST ESTIMATEVALD
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TABLE D- 3 (cont)Cost Unit Tota 1Ac
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TABL E D-4DETAILED COST ESTIMATEVAL
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TABLE D-4 (cont)Co st Unit Tota 1Ac
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, ..... ,..\ (I),;> "----f .'-.. -I
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"'~~TAPANDROCK TRAP1600.•. -~ "00
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CORPS OF ENGINEERSU. S. ARMY./f----
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APPENDIX EENVIRONMENTAL DATA
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TABLE 1ATEMPERATURE RECORDING OF AL
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TABLE 1A (cont)ALL! SON CREEK (cont
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TABLE 1A (cont)ALLISON CREEK (cont)
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ALLISON CREEK (cont)FEBRUARY HIGH L
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ALLISON CREEK (cant)TABLE lA (cant)
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TABLE 1A (cont)ALLISON CREEK (cont)
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TABLE 1A (cont)SOLOMON CREEK - HIGH
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TABLE 1A (cant)SOLOMON CREEK (cant)
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TABLE 1A (cont)SOLOMON CREEK (cont)
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TABLE lA (cont)SOLOMON CREEK (cont)
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TABLE 1A (cont)SOLOMON CREEK (cont)
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SOLOMON CREEK (cont)TABLE 1A (cont)
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TABLE 2ACalculated Flows of Allison
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TABLE 2BCalculated Flows of Allison
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TABLE 4AWater Quality Data of Allis
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TABLE 4A (cont)PARAMETERCalciumMagn
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TABLE 4A (cont)PARAMETERTurb i d it
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TABLE 4A (cont)PARAMETERTurb i d it
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TABLE 4BALLISON LAKEWA TER QUALI TV
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TABLE 6BIRDS OF THE PORT VALDEZ ARE
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Oregon JuncoTree SparrowWhite-crown
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UNITED STf-lrESDEPARTMENT OF THE IN
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c. Effects on Benthos: The proposed
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An ecological evalu~)tion as requir
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JAY S. HAMMO~D. GOVERNORDEPARTMENr
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CULTURAL RESOURCESAboriginal Settin
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shorp--probablv to facilitate easie
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Today the Alyeska oil terminal enco
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APPENDIX GFOUNDATIONS AND MATERIALS
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100 psi pressure at depth. The sour
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-1'~~ ·/~-IU-'J\·-----'~r-.-;-,~
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~UMi'.'j~'~Y!lfGIOL~ N ..--Pa.w'rln
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; ;; Ii; Z II;;; II til, ;;; : i;;
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Valdez InterimSouthcentral Railbelt
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LIST OF FIGURES AND TABLESPageFigur
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-----------------------------------
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-~~ ~..rt~i~;Valdez Interim ReportS
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alder, salmonberry, blueberry, and
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Table IIPrince William Sound Salmon
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3/ 4/ 5/- - -1976 Average weights b
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the number of pink salmon counted i
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in the fall at the upper end of the
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Table 1 VAllison Creek -Discharge M
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outlet from the lake; however, the
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As stated previously, two alternati
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Discharge measurements are sparse a
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Streambed sedimentation can be caus
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8. That during the construction pha
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LITERATURE CITEDBailey, Jack E., an
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Sharp-shinned hawk - Accipiter stri
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Allison ereekTemperature DataDateTe
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ALLISON CREEKSeptember 1979 . Octob
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ALLISON CREEKDecember 1979 Januarl
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SOLOMON. CREEKSeEtember 1979 Octobe
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7. That clearing for the penstock c
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22. That a cooperative study of the
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APPENDIX IMARKETABILITY REPORT
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Department Of EnergyAlaska Power Ad
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Valdez/Glennallen Power Market Anal
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List of·Tab1esTableIII-1IV-1IV-2V-
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Valdez/Glennallen Power Market Anal
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CHAPTER IISUMMARYValdez and Glennal
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A. Assuming Allison Creek follows S
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CHAPTER IIIPOWER MARKET DESCRIPTION
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increases. Municipal construction h
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CHAPTER IVEXISTING POWER SYSTEMSSys
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TABLE IV-1HISTORICAL LOADS--VALDEZ
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Load FactorsThe following chart lis
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CHAPTER VFUTURE POWER AND ENERGY AS
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Table V-IVALDEZ/GLENNALLEN AREA UTI
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Table V-2INSTALLED CAPACITY REQUIRE
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CHAPTER VI .ALTERNATIVE GENERATION
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Biomass-FiredAlthough of many forms
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A Solomon Gulch article in the Dece
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Net EnergyThis section discusses th
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Table VII-2Valdez/Glennallen Foreca
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40VALDEZ/GLENNALLENCAPACITY/RESOURC
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150Figure VII-3140VALDEZ/GLENNALLEN
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150·Figure VII-5140VALDEZ/GLENNALL
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TABLE VIII-IASummary Cost EstimateO
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TABLE VIII-2Summary Cost EstimatePr
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Table VIII-3AAverage Rate Determina
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Table VIII-4CVEA Diesel Generation
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Table VIII-5Average Rate Comparison
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Table VIII-6Average Rate Determinat
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Table VIII-8Average Rate Determinat
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Table VIII-IOAverage Rate Determina
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----~------T'lble VIII-J 1Average R
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CHAPTER IXBIBLIOGRAPHY1. Power Cost
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: I,B'III Ii ::1: iii,APPENDIX JPUB
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Recipents of Valdez Draft Interim f
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u. s. ENVIRONMENTAL PROTECTION AGEN
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25. ~e str?ngly recOTmend that an a
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UNITED STATES DEPARTMENT OF CO!'!ME
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3. have adequate flows for flushing
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Cnitc:d Srat6 [)c'~,artmcnt of the:
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AdvisoryCouncil OnHistoricPreservat
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Corps Of Engineers - 2 -11/4/80Than
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-2-'2. Most of the State 1 and enco
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-~-The SCH has no objection to this
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ALASKA POWER AUTHORITY333 WEST 4th
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Electrical Power for Valdez and the Copper River Basin-1981

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