Electrical Power for Valdez and the Copper River Basin-1981

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were estimated based on Tonsina River flows. As with the Tonsina site,precipitation and area rati()s were used to generate the Tiekel flows fromthe Tonsina's.The pertinent characteristics for each site are shown below:GageCreek Gage Used% Average AverageArea in Annual Gage AnnualArea Glaciers Precip. Area Precip.(mi2) ( in) (rli2) ( in)Overa 11RatioKlutina Klutina 826 5 -1 0 880Tiekel Tonsina 367 15 53. 1 420 28.0Tonsina Tonsina 263 10 32.9 420 28.0Ts ina Solomon 5'1 50 70.4 19 1 140.941.660.741. 79Estimated Damsite Streamflows:It has been assumed that the streamflows determined through theprevious analysis would be the estimated damsite streamflows.~v aporat ion:The normal high relative humidity, high percentage of overcast days,and cool climate preclude any appreciable loss from evaporation.Estimates of flow were based on records of existing or historical gagingstations near the project areas, and include evaporation from the streamsurface. Due to the nortllern latitude and prevailing maritime climate,additional evaporation from the reservoir surface would beinsignificant.Flood Characteristics:Snowmelt-type floods are dependent upon two conditions: (1) theamount of accumulated snow; and (?) the temperature sequence during thespring melt period. A 1 arge snowpack over the basin will give a 1 argevolume of runoff during the spring. However, if the temperaturesincrease gradually, causing slower snowmelt, the flood peak will be justslightly above normal. If the early spring is colder than normal andthen tile temperatures rise rapidly for a prolonged period, the flood peakwill be extremely high with the duration of flooding dependent upon thetotal snowpack.On the streams in the southern portion of the study area, rainfloodsproduce the highest flm ... s. These occur in the fall, generally betweenlate August and October. The flood peaks are quite sharp due to the fastrunoff, which is caused by the steepness of the terrain and the lowinfiltration losses into the underlying rock. On the Klutina and TonsinaRivers, the flooding characteristics are mixed. The annual peak flows onA-8
the Klutina generally occur at any time throughout the summer, as aresult of rainstorms. However, the maximum recorded flow there was inJune, during a snowmelt runoff. The Tonsina's highest flows yearly rangefrom early June to mid-September, being caused either by snowmelt orrainfall flooding.Past Floods:The maximum instantaneous recorded discharge for the five recordingstations utilized in the study are:Lowe RiverKlutina RiverTonsina RiverPov.Jer CreekSo 1 omon Gu lchFlood Frequencies:Date9/11/75fJ/29/536/17/629/25/499/04/51Pe ak (cfs)12,6009,0408,4905,5402,420The following is a tabulation of the peak discharges for thevarious recurrence intervals:Peak Discharges - cfsRecurrence Lowe Power So lomonInterval River Creek Gulch(years)5 11,900 3,750 2,20010 14,900 4,650 2,60025 18,800 5,750 3,20050 23,000 6,900 3,750100 27,500 8,000 4,300Probable Maximum Flood:The Probable Maximum Flood (PMF) is used for spillway sizing and forestimating downstream impact. Since Allison Creek has a lake tap and noassociated dam, no spillv.Jay shall be required. Thus, the PMF derivationis also not necessary. Also, since the other proposals investigated havenot been judged worthy of further consideration at this time, no PMF wasderived of these sites.A-9
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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
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 92 and 93: APPENDIX AHYDROLOGYTABLE OF CONTENT
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 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 (
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
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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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