Electrical Power for Valdez and the Copper River Basin-1981

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VALDEZ HYDROELECTRIC POWER PROJECTGENERALA lake tap scheme for lake entry at Allison Lake was studied. Twosites near the lower outlet of Allison Creek were considered for thelocation of the powerp1ant. The first alternate site for the powerplantis located approximately 200 feet uphill from the mouth of Allison Creekat elevation 20 feet MSL and the second alternate site is located about2000 feet from the bay of the Port of Valdez at elevation 100 feet MSL.Access to both powerplant sites during construction and operation wouldbe by road. Access to the tunnel portal and other work areas would be byhelicopter. The first alternate powerplant site would require a waterpump system to pump adequate water back to the main creek channel aboveAlyes~a's weir to provide for their water supply and fishery waterrequirements. After economic evaluations it was determined that thelower powerhouse site, Alternative 1, could not be incrementallyjustified for the additional energy it would provide. However, bothalternatives are presented here.WATERWAYSThe method of lai
Power Tunne 1The power tunnel would be partially concrete lined 6-foot circularand oartially unlined 8-foot horseshoe shaped tunnel approximately 10,200feet lonq, from the lake tap chamber to the tunnel portal. About 100feet downstream of the gate structure, the power tunnel would drop at a45-deqree angle to elevation 1,050 and would continue down at 0.5 percentslope until it would daylight at elevation 1,000 at the tunnel portal.ApproximatAly 300 feet from the tunnel portal, a transition from a powertunnel to a steel penstock would occur.Intake TrashrackThe power tunnel entrance would be covered by a steel trashrack toprevent debris from entering the intake and reaching the turbines. Thetrashrack would be placed partially in the wet after the lake is drawndown through the power tunnel and aboveground penstock during the lowinflmv period.Gate Control RoomThe gate control room would consist of a hoist machinery room, avertical access shaft and a gate room. The hoist machinery room, locatedat elevation 1,456, would house a crane rail hoist and an elevator. Thevertical access shaft, which is approximately 200 feet long and 16 feethigh by 16 feet wide. would have a ladder from the hoist room to the gateroom. The elevator shaft would be adjacent to the access shaft and theelevator would be an overhead hoist cable operated system. The gate roomwould contain two 6 by 16 feet slide gates, one heavy duty and onestandard type, set in tandem. There would be a crane rail hoist at thegate room above the heavy gate for lifting and shifting the gate to thearea below the upper hoist during maintenance. An access hatch and avent would be provided at the gate room floor. The 18-inch diameter ventpipe would run from the power tunnel to the gate room and up through thevertical access shaft, to the hoist machinery room then finally outthrough the access adit.Access AditAccess to the gate control room would be through the access adit.The adit would be an 8-foot diameter horseshoe shaped tunnel, approximately100 feet in length and located at elevation 1,456. A 100- by100-foot staging area and heliport would be cleared adjacent to theaccess adit portal.PenstockThe penstock would be a 48-inch diameter, all welded structuresupported on concrete piers at approximately 40 feet on centers. Thesteel penstock would emerge from the power tunnel portal and wouldcontinue downstream to the aboveground powerhouse following the existingground contours. At alternate powerhouse Site No.1, the penstock wouldbifurcate into two penstocks immediately upstream of the powerhouse valveroom. Each penstock would connect with a valve in the valve room, anddownstream of each valve, a penstock extension would connect to a0-2
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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
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ALLISON LAKE
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From the time of pO\'Ier-on-line, o
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Technical services such as electron
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175150FIGURE: 2ENERGY DEMAND - REVI
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175150FIGURE: 4ENERGY - REVISED APA
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SYSTEMOF ACCOUNTSAccountsPlan AAll
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AccountsPlan A.All Diesel Generatio
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then be determined for the 100-year
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Comnents received from the city of
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FINALENVIRONMENTAL IMPACT STATEMENT
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LIST OF PRFPARERSNameExpert i seExp
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COMPARATIVE IMPACTS OF ALTERNATIVES
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AREAS OF CONTROVERSYTo date no spec
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COVER SHEETLIST OF PREPARERSFINAL E
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A. NEED FOR AND OBJECTIVES OF ACTIO
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alternative has been estimated to p
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slopes surrounding Allisorl Lake ar
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weir to the mouth, with the majorit
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expected to Allison Creek below All
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2. Biologicala. Vegetation:,r-.Hydr
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Waterfowl and water related birds f
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within the local community. The imp
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Cumulative impacts to the Port Vald
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Program-related issues. The Alaska
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13.10INDEXSubjectsAffected Environm
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APPENDIX AHYDROLOGYTABLE OF CONTENT
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snowfields and glacier areas on the
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AVERAGE MONTHLY PRECIPITATION(inche
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gages at Lowe River near Valdez, Lo
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were estimated based on Tonsina Riv
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'fUR r)c r ,-. n:c JA~ FEEl "'A~ AP
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--..,I-J--. -,-- - ----- - --TONS I
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ALLISON CREEKESTIMATED STREAMFLOW -
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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 (
Page 142 and 143: energy would be fully utilized. As
Page 144 and 145: ECONOMIC EVALUATION OF HYDROPONER M
Page 146 and 147: ECONOMIC EV~LUATION OF HYDROPO~ER M
Page 148 and 149: ------~-~ECONO~IC EVALUATION OF HYD
Page 150 and 151: ECONOMIC EVALUATION OF HYDROPO~ER M
Page 152 and 153: ECONO~IC EVALUATION OF HYDROPOwER M
Page 154 and 155: APPENDI X DPROJECT DESCRIPTION AND
Page 156 and 157: POWERHOUSETypeTRANSMISSION LINEVolt
Page 158 and 159: POWERHOUSETypeTRANSMISSION LINEVolt
Page 162 and 163: turbine. The penstock would bifurca
Page 164 and 165: TABLE D-lSUMMARY COST ESTIMATEOCTOB
Page 166 and 167: TABLE 0-3DETAILED COST ESTIMATEVALD
Page 168 and 169: TABLE D- 3 (cont)Cost Unit Tota 1Ac
Page 170 and 171: TABL E D-4DETAILED COST ESTIMATEVAL
Page 172 and 173: TABLE D-4 (cont)Co st Unit Tota 1Ac
Page 174 and 175: , ..... ,..\ (I),;> "----f .'-.. -I
Page 176 and 177: "'~~TAPANDROCK TRAP1600.•. -~ "00
Page 178 and 179: CORPS OF ENGINEERSU. S. ARMY./f----
Page 180 and 181: APPENDIX EENVIRONMENTAL DATA
Page 182 and 183: TABLE 1ATEMPERATURE RECORDING OF AL
Page 184 and 185: TABLE 1A (cont)ALL! SON CREEK (cont
Page 186 and 187: TABLE 1A (cont)ALLISON CREEK (cont)
Page 188 and 189: ALLISON CREEK (cont)FEBRUARY HIGH L
Page 190 and 191: ALLISON CREEK (cant)TABLE lA (cant)
Page 192 and 193: TABLE 1A (cont)ALLISON CREEK (cont)
Page 194 and 195: TABLE 1A (cont)SOLOMON CREEK - HIGH
Page 196 and 197: TABLE 1A (cant)SOLOMON CREEK (cant)
Page 198 and 199: TABLE 1A (cont)SOLOMON CREEK (cont)
Page 200 and 201: TABLE lA (cont)SOLOMON CREEK (cont)
Page 202 and 203: TABLE 1A (cont)SOLOMON CREEK (cont)
Page 204 and 205: SOLOMON CREEK (cont)TABLE 1A (cont)
Page 206 and 207: TABLE 2ACalculated Flows of Allison
Page 208 and 209: 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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