Electrical Power for Valdez and the Copper River Basin-1981

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100 psi pressure at depth. The source is located in or above the cliffsbordering the lake. Precisely locating the tap will require underwaterphotography and possible use of diver inspection. Additional drilling will berequired during the General Design Memorandum phase to determine exactoverburden thickness and rock characteristics. Artesian conditionsencountered in the vicinity could pose a problem during construction and willrequire further investigation.POWER TUNNELAs noted, Allison Lake sits in a glacier scoured valley. The lake outletis in what appears to be deep till deposits. DH-2, located approximately4,000 feet downstream of the lake outlet, did not penetrate bedrock at a depthof 64 feet. Assuming a relatively flat rock line, bedrock may be at anelevation between 1,150 and 1,200, 170 to 220 feet below lake elevation. Thisis based on the elevation of the falls downstream of the outlet. DH-2 wasdrilled from an elevation of 1,350 feet, 1,200 feet east of metagraywackecliffs. This reinforces the suspicion of deep tills in the valley.Plans call for a power tunnel invert elevation of 1,050 feet. The tunnelhas been alined to be under the metagraywacke cliffs to assure that it waslocated in rock. Additional postauthorization explorations and studies maylocate suitable rock in the valley floor which would permit a shorter tunnelalinement. The cost estimate for the proposed tunnel was based on an 8-footunlined horseshoe tunnel for 50 percent of the length and a 6-foot diameterconcrete lined circular tunnel for 50 percent of the length. Duringpostauthorization studies, additional drilling will be done to determine theextent of overburden and condition of underlying rock.POWERHOUSEOne hole DH-3, has been drilled in the lower powerhouse area, penetrating69 feet of Allison Creek delta deposits before encountering moderately tohighly fractured metagraywacke. While the delta deposits would make goodfoundation material for a small surface powerp1ant, the area may be subject totsunami below an elevation of +85 MLLW. During slide induced sea waves, runupat Anderson bay, 7 miles west of Allison Creek, was measured at 70 feet.Measurements at Shoup Bay (Cliff Mine) on the north side of the arm show arunup of 170 feet. No runup measurements were made at Jackson Point orFort Liscum, but the cannery at Jackson Point floated away.Maximum high tide in Port Valdez is approximately +14 MLLW; therefore, toinclude the 70-foot runup at Anderson Bay the powerhouse elevation should beat least +85 MLLW. For this reason the upper powerhouse, located atapproximately +100 MLLW was selected. Additional reconnaissance andexplorations will be required for final powerhouse location duringpostauthorization studies.G-2
COMMEIHSPermeability of the glacial till and the artesion water will have to beassessed after additional drilling and e~ploration~ to determine the extent ofand solution to the problem.ADDITIONAL WORKDue to preliminary nature of the work performed to date, additionaldrilling and regional and local mapping will have to be done during theGeneral Design Memorandum phase. The particular questions to be addressedwi 11 be:a. Condition and permeability of bedrock on proposed tunnel alinements forlining requirements.b. Depth and permeability of tills.c. Source of artesian water in lake tap area.G-3
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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
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IIHf{ODUCTIONThis section is devote
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FIGURE: B-1PRICE INCREASES OF DIESE
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Installed Generat.or Peak Energy fo
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90008000700060005000- 4000 ~..-:300
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Table 4VALDEZ-GLENNALLEN AREA UTILI
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As footnoted, the Alaska Power Admi
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201510CDI5.: ...:.T. .' !', ~. '.,
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SOLOMON HY I.IICU'-__'lOUIE 1-7 MlN
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, .. ,·.AYI.AG! fOWl. DlMANO WHit,
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The following is an excerpt from th
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Power Requirement Study (excerpt)GL
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APPENDIX CECONOMIC EVALUATION
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INTRODUCTIONThe purpose of this sec
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value of 66.92 mills/kWh. This figu
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FIGURE C-2: SOLOMON GULCH ALLISON L
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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
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
Page 210 and 211: TABLE 4AWater Quality Data of Allis
Page 212 and 213: TABLE 4A (cont)PARAMETERCalciumMagn
Page 214 and 215: TABLE 4A (cont)PARAMETERTurb i d it
Page 216 and 217: TABLE 4A (cont)PARAMETERTurb i d it
Page 218 and 219: TABLE 4BALLISON LAKEWA TER QUALI TV
Page 220 and 221: TABLE 6BIRDS OF THE PORT VALDEZ ARE
Page 222 and 223: Oregon JuncoTree SparrowWhite-crown
Page 224 and 225: UNITED STf-lrESDEPARTMENT OF THE IN
Page 226 and 227: c. Effects on Benthos: The proposed
Page 228 and 229: An ecological evalu~)tion as requir
Page 230 and 231: JAY S. HAMMO~D. GOVERNORDEPARTMENr
Page 232 and 233: CULTURAL RESOURCESAboriginal Settin
Page 234 and 235: shorp--probablv to facilitate easie
Page 236 and 237: Today the Alyeska oil terminal enco
Page 238 and 239: APPENDIX GFOUNDATIONS AND MATERIALS
Page 242 and 243: -1'~~ ·/~-IU-'J\·-----'~r-.-;-,~
Page 244 and 245: ~UMi'.'j~'~Y!lfGIOL~ N ..--Pa.w'rln
Page 246 and 247: ; ;; Ii; Z II;;; II til, ;;; : i;;
Page 248 and 249: Valdez InterimSouthcentral Railbelt
Page 250 and 251: LIST OF FIGURES AND TABLESPageFigur
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Page 254 and 255: -~~ ~..rt~i~;Valdez Interim ReportS
Page 256 and 257: alder, salmonberry, blueberry, and
Page 258 and 259: Table IIPrince William Sound Salmon
Page 260 and 261: 3/ 4/ 5/- - -1976 Average weights b
Page 262 and 263: the number of pink salmon counted i
Page 264 and 265: in the fall at the upper end of the
Page 266 and 267: Table 1 VAllison Creek -Discharge M
Page 268 and 269: outlet from the lake; however, the
Page 270 and 271: As stated previously, two alternati
Page 272 and 273: Discharge measurements are sparse a
Page 274 and 275: Streambed sedimentation can be caus
Page 276 and 277: 8. That during the construction pha
Page 278 and 279: LITERATURE CITEDBailey, Jack E., an
Page 280 and 281: Sharp-shinned hawk - Accipiter stri
Page 282 and 283: Allison ereekTemperature DataDateTe
Page 284 and 285: ALLISON CREEKSeptember 1979 . Octob
Page 286 and 287: ALLISON CREEKDecember 1979 Januarl
Page 288 and 289: 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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