Electrical Power for Valdez and the Copper River Basin-1981

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------------------------------------------------------------------------~IGLENNALLENVALDEZLOCATION A ~J () V I C I NIT Y M /\ Ps au THe [ N T R A L n A I L. [3 E L T S H; 0 Y----_._------_._--------------------_.--------------------3
PROJECT DESCRIPTIONThe proposed Allison Lake hydropower facility will consist of a laketap at 1,250 feet elevation, a rock tunnel from this level to 1,220feet elevation, and a 48~inch penstock reaching from the lake tapthrough the rock tunnel to one of the two proposed powerhouse alternatives(Figures 2 and 3). Both proposed powerhouse alternativesare located on Alyeska Pipeline Service Company property and eitherwould occupy about 1.5 acres. The Alyeska terminal site road wouldprovide access to either site, with only an additional 50-100 feetof road construction required.Powerhouse alternative #1 is proposed above the existing weir inAllison Creek, which was constructed by the Alyeska Pipeline ServiceCompany for a partial source of water for the terminal of the TransAlaska Pipeline. The proposed powerhouse is at an approximateelevation of 100 feet (Figure 2). The tailrace would run directlyinto Allison Creek at this location. The CE has not proposed a dualtailrace configuration at this site as described below for powerhousealternative #2; however, further consideration of such a feature atthis site is contained in the discussion section of this report.Powerhouse alternative #2 is proposed near tidewater at an approximateelevation of 10 feet (Figure 3). A combination of two tailraces areproposed by the CE for this powerhouse. One would discharge directlyinto Port Valdez, the other would discharge into Allison Creek nearthe proposed powerhouse. CE personnel have stated that the dischargefrom the proposed powerhouse could be regulated through each tailraceindependently or through each simultaneously. For example, flowthrough one tailrace could be constant while flow through the otherwould vary according to power generation requirements. In addition,a six-inch steel diversion pipe is proposed from the penstock toAllison Creek above the existing weir to provide supplemental waterif the tributary flow to the creek is not sufficient for the needsof Alyeska, and resident and anadromous fish.To allow disposal of the proposed spoil, excavated from the rocktunnel, an access road approximately 500 feet long will be constructedfrom the lower end of the rock tunnel at 1,220 feetelevation due east to the edge of a cliff. About 45,000 cubic yardsof rock is proposed to be dumped over this cliff and into a deepgorge.The proposed transmission line will run 3.5 miles from one of theproposed powerhouse sites to the Solomon Gulch substation of theSolomon Gulch hydropower facility, now under construction by theCopper Valley Electric Association. It will closely follow theroute of the existing Dayville Road along Port Valdez.RESOURCE INVENTORYLower elevations of thi/coastal forest in this region support densestands of Sitka spruce- and mountain hemlock with an understory of_T I' Common names of plant and animal species are used throughout t hi sreport. A list of scientific names is given in APPENDIX A.
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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
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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)
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 240 and 241: 100 psi pressure at depth. The sour
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
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
Page 290 and 291: 7. That clearing for the penstock c
Page 292 and 293: 22. That a cooperative study of the
Page 294 and 295: APPENDIX IMARKETABILITY REPORT
Page 296 and 297: Department Of EnergyAlaska Power Ad
Page 298 and 299: Valdez/Glennallen Power Market Anal
Page 300 and 301: 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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