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Home My WebLink AboutAPA1778SUSITNA HYDROELECTRIC PROJECT FEDERAL ENERGY REGULATORY COMMISSION PROJECT No.1114 ,---------" =0)=:::00-0)............c.o "~ALASKA POWER AUTHORITY -==-: !3~0"'-===0c-=~COMMENTS ~LO "'"~~ON THE - ""-'~FEDERAL ENERGY REGULATORY COMMISSION DRAFT ENVIRONMENTAL IMPACT STATEMENT OF MAY 1984 VOLUME 7 APPENDIX :Ie - TEMPERATURE SIMULATIONS, SUSITNA RIVER,WATANA DAM TO SUNSHINE GAGING STATION, OPEN WATER AUGUST 1984 DOCUMENT No.1778 ,-_ALASKA POWER AUTHORIT"_-,", - ,.... FEDERAL ENERGY REGULATORY COMMISSION SUSITNA HYDROELECTRIC PROJECT PROJECT NO.7114 ALASKA POWER AUTHORITY COMMENTS ON THE FEDERAL ENERGY REGULATORY COMMISSION DRAFT ENVIRONMENTAL IMPACT STATEMENT OF MAY 1984 Document No.1778 Susitna File No.6.4.6.2 TK 1Y.~5 .S9 F4=f?. Y\D 1 nlfl - ~- Volume 7 Appendix V -Temperature Simulations,Susitna River, Watana Dam to Sunshine Gaging Station,Open Water - - - 0') co 0') (0 (0 M ooo LC:l1 LC'l1 1"'-. C":I ~) August 1984 ARLIS Alaska Resources Library &InformatIOn Services Anchorage,Alaska ----,---------- - - ..- ..- - - APPENDIX V This Appendix contains results of temperature simulations for open water reaches of the Susitna River for natural and with-project conditions.These simulations were carried out using the SNTEMP model described in a report by Arctic Environmental Information and Data Center (AEIDC 1983)which was provided to the Federal Energy Regulatory Commission (FERC)by the Alaska Power Authori ty (Power Authori ty)on December 5,1983.Initial resu1 t s of simulations carried out with this model are included in a second report (AEIDC 1984)provided to FERC on March 9,1984. The simulations in this Appendix were made in response to the FERC's Request for Supplemental Information,Exhibit E,Schedule B,No.2.28 of April 12, 1983,a copy of which 1.S attached as Exhibit A to this Appendix. Additionally,the simulations herein are referenced in the Power Authority's COIIDnents on FERC's Draft Environmental Impact Statement on the Susitna Hydroelectric Project (DEIS).The referenced Technical Comments are AQR033, AQR043,AQR046,AQR066,AQR071,AQR098,AQR099 and AQR109.Simulations were made for various hydrological and meteorological conditions,for four levels of project energy demands and for filling of Watana Reservoir.Case C minimum target flows,as defined in the License Application (p.E-2-57), were used.Reservoir temperature simulations using the DYRESM model (Appendix IV)provided the upstream boundary condition for all with- project runs.Upstream boundary condi tions for natural condi tion "if simulations are as described in the reports (AEIDC 1983 and AEIDC 1984). River temperature simulations have been divided into summer (May 1 to September 30)and winter (September 1 to April 30)periods for each year simulated.There is a one month overlap for the two periods.The open water river temperature simulations have also been coordinated with the river ice simulations.Open water temperature modeling using SNTEMP provided the link between the reservoir outlet which was always above DoC, and the O°C isotherm or the upstream extent of the ice cover,whichever was further upstream. - - - - 420663 840816 1 ARLIS Alaska Resources Library &Infonnatlon ServIces Anchorage,Alaska "'"' - - - If the GOC isotherm were upstream of the ice front,the ICECAL model would compute the frazil and border ice generated in the open water between the GOC isotherm and the ice front.If the temperature at the ice front was above DoC,the ICECAL model would compute the melting of the ice front,the temperatures in the river downstream of the ice front and the location of the GOC isotherm under the lce. For the period November to April,the open-water temperature simulations provided in this Appendix should always be used in conjunctiort with the ice simulation for the same period.The SNTEMP model does not .give accurate temperature simulations under an·lce cover.Therefore,in areas where an ice cover lS simulated to occur,the temperatures shown in this Appendix should not be used.The temperatures in this Appendix are valid upstream of the ice cover.Under the lce cover,the temperatures would be as simulated by ICECAL and as shown on the plots in Appendix VI.In order to facilitate coordination between this Appendix and Appendix VI,the approximate locations of the simulated ice front have been plotted on the exhibits herein. The locations of the GOC isotherms shown on the exhibits in this Appendix and Appendix VI were plotted in different manners.In this Appendix, locations of GOC were plotted at mid-week of the weeks they were simulated for and the points were connected.For the ice simulation studies,the mid- week values were used to represent conditions for the entire week and were plotted as weekly values. Open water temperatures were simulated on a weekly average basis.The upstream boundary conditions of water flow and discharge were computed as weekly averages of daily values derived from DYRESM simulations. -420663 ·840816 2 1.Arctic Environmental Information and Data Center,1984,"Stream Flow ..-, - REFERENCES and Temperature Modeling 1.n the Susitna Basin,Alaska" Hydroelectric Project Report. Susitna 2.Arctic Environmental Information and Data Center,1983,"Examination of Susitna River Discharge and Temperature Changes Due to the Proposed .... - - .... - -- Susitna Hydroelectric Project Project Report • 420663 840816 3 Final Report ll Susitna Hydroelectric Number A LIST OF EXHIBITS Title The Alaska Power Authority's response to the Federal Energy Regulatory Commission I s Request for Supplemental Information of April 12,1983 -Schedule B,Exhibit E,No.2.28 B Simulated Susitna River Temperatures at River Mile 130; Natural Conditions C -D -1--' E -. F- Simulated Susitna River Temperatures at River Mile 130; Watana Filling Simulated Susitna River Temperatures at River Mile 130; Watana Operating.1996 Energy Demand Simulated Susitna River Temperatures at River Mile 130; Watana Operating,2001 Energy Demand Simulated Susitna River Temperatures at River Mile 130; Watana and Devil Canyon Operating,2002 Energy Demand G Simulated Susitna River Temperatures at River Mile 130; Watana and Devil Canyon Operating,2020 Energy Demand H Simulated Susitna River Temperatures at River Mile 84; Natural Conditions - - I J K 420663 840816 Simulated Susitna River Temperatures at River Mile 84; Watana Fi 1ling Simulated Susitna River Temperatures at River Mile 84; Watana Operating,1996 Energy Demand Simulated Susitna River Temperatures at River Mile 84; Watana Operating,2001 Energy Demand 4 Open Water Temperature Simulations Energy Meteorologic Reservoir(s)Demand and Hydrologic Operating Year Date Period N Natural Conditions (Simulated)5/71-4/72 -fMIlII4, 0 Natural Conditions (Simulated)5/74-4/75 P Natural Conditions (Simulated)9/76-4/77 Q Natural Conditions (Simulated)5/81-4/82 R Natural Conditions (Simulated)5/82-4/83-S Watana First Winter 9/82-4/83 of Filling -T Watana Second Summer 5/81-9/81 •r of Filling ~U Watana Second Winter 9/81-4/82 of Fi lling V Watana Third Summer 5/82-9/82-of Fi lling W Watana 1996 5/71-4/72-X Watana 1996 5/74-4/7 5 Y Watana 1996 9/76-4/77 ~Z Watana 1996 5/81-4/82 AA Watana 1996 5/82-4/83 AB Watana 2001 5/71-4/72 AC Watana 2001 5/74-4/7 5-AD Watana 2001 5/81-4/82 420663 5-840816 - LIST OF EXHIBITS,.... (continued) Number Title -Energy Meteorologic Reservoir(s)Demand and Hydrologic-Operating Year Date Period AE Watana 2001 5/82-4/83 AF Watana &Devil Canyon 2002 5/71-4/72 AG Watana &Devil Canyon 2002 5/74-4/75..- AH Watana &Devil Canyon 2002 9/76-4/77. AI Watana &Devil Canyon 2002 5/81-4/82 AJ Watana &Devil Canyon 2002 5/82-4/83 AK Watana &Devil Canyon 2020 5/71-4/72 ..-AL Watana &Devil Canyon 2020 5/74-4/75 AM Watana &Devil Canyon 2020 9/76-4/77-AN Watana &Devil Canyon 2020 5/81-4/82 AO Watana &Devil Canyon 2020 5/82-4/83 - - - The simulations for meteorologic and hydrologic conditions for 1974-1975, 1982-1983 and 1981-1982 represent dry,average and wet hydrologic conditions as requested by FERC.The simulations for 1971-1972 and 1976-1977 we:re undertaken for river ice simulation modeling and represent cold and average winter weather conditions. .-. 420663 840816 6 EXHIBIT A - -- .- Exhibit A The Alaska Power Authority's Response to the Federal Energy Regulatory Commission's Request for Supplemental Information of April 12,1983 - Schedule B,Exhibit E No.2.28. 420663 840802 - - - - -- EXHIBIT E 2.Water Use and Quality Comnent 28 (p.E-2-87,para.I) Provide longitudinal profiles of predicted weekly average temperatures down- stream of Watana Dam and Devi 1 Canyon/Watana using the DYRSEM and HEATSIM models.Simulations for stations with pre-project temperature data should be provided with Watana in operation "and Devil Canyon/Watana in operation using data for an average water year and for conditions of minimum releases (i .e.,using data for a minimum flow year)from Watana .and from Devil Canyon."Listings of inputs used and assumptions made in each simulation should also be provided.Outflow temperature from each reservoir used in the HEATSIM model should include the temperatures that would have to be available at the multilevel intakes in order to match pre-dam temperatures that would have to be available at the multilevel intakes in order to match pre-dam temperatures.Meteorological conditions used as rrodel parameters shoul d be prov;ded.These simul ated average week ly temperatures shoul d be compared to pre-project temperatures measured during low-fl ow and average flow years.Provide parameter values used in each simulation and document the source of the values used. Response: Daily simulations of reservoir and river temperatures had been prepared to provide the longitudinal profiles of temperatures downstream of Watana dam and Watana/Devil Canyon using the DYRESM and HEATSIM model s for a wet year (1981)condition (Acres Jl.merican Inc.,1983a,1983b).Selected profiles from the daily simulations are given as Figures 8.44 to 8.56 (attached)in Acres 1983b.Figures 8.44 through 8.56 (see pages 2-28-6 to 2-28-18)cor- respond to Figures E.2.176 through E.2.178,E.2.180 through E.2.183,and E.2.217 through E.2.222 of Exhibit E,Chapter 2 of the license document. 2-28-1. .- - - - .- ..... To prov i de average week ly temperatures,for compari sons with pre-proj ect temperatures during low-flow and average flow years,additional studies will be conducted in 1983.A work plan to carry out the studies and to provide the updated parameter values and their sources is presented as follows: 1.The parameter values of DYRESM used (in Acres 1983a)will be updated through additional calibration using Eklutna Lake data,including data collected after January 1,1983.This calibrtion effort will be com- pleted by January 1,1984. 2.Water temperature profiles downstream from Watana will be determined by SNTEMP model..!..!(Stream Network Temperature Model).The cali brat i on of SNTEMP will be made using existing streamflow,stream temperature, and meteorological data. 3.The reservoir temperature profiles will be determined using the DYRESM model and the updated parameter values.Outflow temperatures from the reservoir temperature model will be used as inputs for the SNTEMP model to provi de 1ongitudi na 1 profi 1es of temperatures downstream from the reservoir.This study will be completed by June 30,1984. Weekly simulations will be made for comparison with pre-project temperatures measured during low-flow and average flow years for the following cases: l/AEIDC will perform river temperature studies using SNTEMP model. 2-28-2 - - ....' - - .- (a)Filling of Watana reservoir (b)Watana in operation (c)Watana/Devil Canyon in operation Although not specifically requested case (a),filling of Watana Reservoir is included because the cited paragraph (E-2-87,para.1)is in the section ent it 1 ed "Impoundment of Watana Reservoir". Weekly simulations of the reservoir thermal behavior will be performed under various power operation schemes for low-flow,average-flow,and high-flow (1981)years.The resulting outflow temperatures at the multilevel intakes, will be used as inputs to the downstream temperature simulations using the SNTEMP model. The computed temperatures wi 11 be compared wi th the measured pre-proj ect temperatures.Results of the 1983 Study (Acres 1983b)for wet year conditinns will also be verified. The representative years for low-flow (dry),average-flow (average),and high-flow (wet)years conditions are selected based on the available stream- flow data.From a frequency analysis of annual flow volumes at Gold Creek, water years 1974,1982 and 1981 may be considered as dry,average,and wet years,respectively. At the completion of the study,a summary report will be prepared.The report wi 11 inc 1ude: (a)A listing of inputs used in the study. 2-28-3 - (b)The assumptions made in each simulation. (c)The parameter values used in each simulation and documentation of their sources. (d)The outflow temperatures from each reservoir. (e)A comparison of simulated average weekly temperatures with measured pre-project temperatures. Outflow temperatures wi 11 include the temperatures that would have to be available at the multilevel intakes in order to match pre-dam temperatures. The study will be completed by June 30,1984. The parameter values used for the 1983 reservoir thermal simulations are given in the following table: - PARAlVlETER Convective overturn,CK Mechanical stiring,ETA Temporal effects,CT Shear production,CS Diffusion constant W=Wedderburn number W>1 (for general condition) W ~1 (for high wind condition) Drag coefficients VALUE 0.125 1.230 0.510 0.200 0.048 0.096 0.015 -. These parameters values were derived from calibration of the model to Eklutna Lake (Acres 1983b). 2-28-4 References Acres American Incorporated,"S us itna Hydroelectric Project,License Appli- cation,Volumes SA,and 5B,"prepared for Alaska Power Authority, 1983 (a.). - Acres Arneri can Incorporated,..Sus itna Report -Supplement,Chapter 8: Studies,"prepared for Alaska Power Hydroelectric Project Reservoir and River Author'ity,1983(b). Feasibil ity Temperature .-.2-28-5 )J j J )J J )1 WATANA DISCHARGE ICFSI JUN 15 4410 JUN 304210 JUL 15 4130 JUL 31 3970 AUG 15 6250 AUG 31 21000 (llELEASE) '-----~ I I~I II I I I ~I ------------------------------.....--------------- ~~'"----."---.-----_._----~---------_.-. AUG 31 ~--',-- ~UN30 II I I I I I I I I I I 90 B.5 11.5 11.0 120' 125 ;:;105 0- W 0: ::> t:i 0:100w Q. :lEw t- 9.5 B.O AUGJ5 185001"19001/300.16/0016100155.001490014300131.00131.0012500119.001130010100/0100 I I L_l------L_.-L_L...-L-----.L_L---.L I I I _l..-l----.:.L-l_L-l I I I L-L I I I=---..I15 9500 RIVER MilE NOTE: I.MODEL ASSUMES 19BI MU EOROLOGICAL DATA HECOROED AT Y/ATANA. ~.Y/AfANA TEMPERATURE At'O DISCHARGE fROM OYRlSM MODEl.I RUN WA4020) WATANA OPERATION: DOWNSTREAM TEMPERATURES -JUN TO AUG 2 ',I /'~ IIGUHI 844 J j J j J -J j 1 j )1 1 1 J 1 9.0 6.5 6.0 7.5 r } - WATANA DISCHARGE (CFS), SEP 15 12200 (RELEASE) SEP 30 9460 7.0 ;:; ~ ~6.5 ::> ~ ffi 0. :::t ~6,0 55 50 4.5 4.0 I I I ( ( ( I ( (I I I I I I I I .Li-I I I 1-1.--1-1.---1 I I 1--, 9500 101.00 10roO 113.00 11900 12500 131,00 13700 14300 149.00 15500 161.00 16700 17300 17900 18500 NOH': I MODEL ASSUMES 1981 METE:OROLOGICAL OAfA RECORDED AT WA1ANA. 2 WAfANA TEMPERATURES AND DISCHARGE FROM OfRESIA MODE:L (RUN WA4020) RIVER MILE WATANA OPERATION DOWNSTREAM TEMPERATURES -SEP J //- .( FleURE:8 4' 1 I ]J -1 ]J 1I I I J I J J J ]1 I -]I WATANA DISCHARGE lCFSL OCT 15 6110 OCT 31 5820 NOli 15 6580 NOli 31 'OOlO DEC 15 10540 DEC 31 12500 18500179.00173.00 J __L_l .L.l_ 167.0016/00155.001490014300 -'--'-.--.-T (I-T--r--T-T---T d -r---r-l 1370013/00125.00119.00113.00107.00101.00 o 9500 30 I I 1.-.-I I -.',. 3.5 4.0 0.5 1.0 _2.5 u ~ wa: ::J !;< II<20w Do '"W.. 1.5 RIIiER MILE NorES, I.MODEL ASSUMES 1981 METEOROLOGICAL DATA RECORDED AT WATANA. 2.WATANA TEMPERATURES AND DISCHARGE FROM DYRESM MODEL.(RUN WA4020) WATANA OPERATION: DOWNSTREAM TEMPERATURES -OCT TO DEC l /.-if-( FIGIIRF P J J J J J I J 1 I .J J J I J J J APR 15 ...--------- .....- /' / /' WATANA DISCHAFlGE (CfSL JAN 9400 FEB B690 MAR 6100 APR 7480 185001190017300 --- I I I 16100 167.00155.00149001~3001370013100 I I I I I ..L j I I I I 12500 --------------.--------------- 11900 APR 30 11300 /,,""'- 1070010100 ...--- ~O 3D 00 9500 0:1 1:1 H 10 W lr :::> ~ lr 20 '"Q. ;)' '"t- _2.:1..,. RiVER M'LE NOTE: MODEL ASSUMES DAII'!'BASED LONG TERM AVERAGE METEOROLOGICAL DATA AND MEAN MONTHI'!'FLOWS AT WATANA. WATANA OPERATION: DOWNSTREAM TEMPERATURES -JAN TO APR OUTFLOW TEMPERATURE 4°C 2-"'8'-(1 FIGURE 841 J 'I I J J I ]j 1 1 1 j j 1 ~1 J i WATANA DISCHt.RGE ICES). OCT 6770 NOV.6670 OEC.10~00 JAN.9400 165.0017900131.00I~OO119.0011300107.0010100 I I I I I I r==I Ir I I I ;,...r I I I.-J.-I I I I I I I I 1 I I I I I 13700 14300 14900 I~~.OO 16100 16700 173.00 RIVER MIL[ 30 10 3.~ O~ 40 00 9~OO 2.~ <:; !'.. w '"::> I-20'"15... 2'w I- I.~ NOTE: MODEL ASSUMES DAILY BASED LONG TERM AVERAGE METWROLOGICAL DATA AND MEAN MONTHLY FLOWS AT WATANA.WATANA OPERATION: DOWNSTREAM TEMPERATURES -OCT TO JAN OUTflOW TEMPERATURE 4°C 2 2 b Ie FIGURE 6 4! J J )»J J 1 j I ])J j ]1 D 1 WATANA DISCHARGE (CFS)· OcT &770 NOV 8610 DEC IO~OI JAN 9400 185.00IHOO11~001610016100 I i I I.~.--l 155.00'4900 I I l----r-l 13100 14300 RIVER "'ILE T-r--r 1310012500119.0011300107.00101.00 10 30 35 05 4.0 00 9500 0 25 0 w '""I- <I 0:~OW ~::; w I- 15 NOTE; MODEL ASSUMES DAILY BASED LONG TERM AVERAGE MEH.OHOLOGICAL DATA AND MEAN MONTHLY FLOWS AT WATANA. WATANA OPERATION:DOWNSTREAM TEMPERATURES -OCT TO JAN OUTFLOW TEMPERATURE 4 TO 2°C 2..2:.?-II FlGUflE 849 J 1 I ]]I 1 1 1 ~j J i J I ) 40 WATANA DISCHARGE ICfS), JAN 9400 fEB 6690 MAR 8100 APR 7480 55 I 5D 185.0017900161.00 16700 113.00155.0014900157.00 14 3 00 RIVER !,lILE 15100'2500'190011500'07.00'0'00 I I I I I I .A"""""I I I -+==I I J I£--I.......t::=I I C I I j I I~._.1 !I I I I 10 05 00 9500 25 u 0 '"«:::> :2.0 r -----APR 30 '""-;Z APR 15'"t- 1.5 NOTE: ,MODEL ASSUMFS CAlLY BASED LONG TERM AVERAGE METt0ROLOGICAL DATA AND MEAN MONTHLY fLOWS AT WATANA.WATANA OPERATION:DOWNSTREAM TEMPERATURES -JAN TO APR OUTFLOW TEMPERATURE 4 TO 2°C ,.l J.( fJGUR~8 51. »J ]]I ]i J 1 J ]I ])J 1 j } • ~-r-T----r--I---'----T~-~I- ~.O 8.5 8.0 ----.JUL 31 ----..:-.--- AUG 15-------- ----------- r ---..---~ SEP 15 AUG 15----' DEVIL CANYON DISCHARGE ICFSL JUN 15 7920 JUN 305HO JUL 15 6830 JUL 31 6460 AUG 15 9910 AUG 31 21100 {RELEASEl SEP 15 13750 SEP 30 10600 OCT 15 7150 ------l-.J_L ~_L __L __~_-l __1. ::-.... --------.......---.............. ----........................ 1._L __L...L..__L_L -~'-- 149.00 SEP~ 1430013700 ......c 0 •__~~r~__ 13100 .1 1250011900113.0010loo101.00 5.5 5.0 9500 60 1.5 U ~ w 0: ~TOw Q. ::0w0- 6.5 RIVER MILE NOTE, I.MODEL ASSUMES 1981 METEOROLOGICAL DATA RECORDED AI WAIANA 2.DEVIL CANYON TEMPERATURE AND DISCHARGE FROM OYRESM MODEL.(RUNS OCI020 AND OCI0211 WATANA I DEVIL CANYON OPERATION DOWNSTREAM TEMPERATURES -JUN TO OCT I • I _' fiGURE 6.51 -)I -)1 )]j 1 J "J J J -)J 1 -j i J • 6.0 55 I I 1'\I I f DEVIL CANYON DISCHARGE (CFSh OCT 31 8690 NOV 15 10300 NOV 30 10500 DEC 15 10900 DEC 31 11100 50 4.5 4.0 ~3.5... 0: ~ !;;: £l: '"II. 3.0::!...... 2.5 c_ 2.0 1.5 1.0 WATANA /DEVil CANYON OPERATION DOWNSTREAM TEMPERATURES -OCT TO DEC ......L-'....--L.._...L-.l....-l..-.....L...I f I I./ 15500 L..-.....L.. 149.00 1...._1_..-1. 14300 L.....J 1370013100 RIVER MILE 12500 1......L.--L.......L....._.1 119.00113001010010100 0.5 9500 NOTE· I MOOEL ASSUMES 1961 MET EOROLOCICAL OATil. RECOROED AT WATANA. 2.DEVIL CANYON TEr,lPEHATURE AND DISCHARGE FROM OYRESM MOOF!IRUN OC,02Z) fiGURE 8 ~. ]1 )J J J J J J J J 1 I J }]J ,. DEVIL CANYON DISCHARGE ICfS) OCT 7320 NOV 9440 DEC 11,130 JAN 10,480 \4900143001~7oo1.11.001190012500 RIVER MILE 1130010700101.00 l ILl I I I I I I I I I.~--L.--L I I I , I 10 4.0 3.0 35 O~ 0.0 95.00 Z~ u ~ UJ II:=>~20 UJ 0. :l; UJ.... I.~ NOTL MODEL ASSUMES DAILY 8ASED LONG TERM AVERAGE MET£OfIOLOGICAL DATA AND MEAN MONTHLY fLOWS AT DEVIL CANYON. WATANAI DEVil CANYON OPERATION DOWNSTREAM TEMPERATURES -OCT TO JAN OUTFLOW TEMPERATURE 4° Z ?'t-I'~ FIGURE 8.53 1 j J ].J J )J J j J -,J J -'1 ']i .J WATANAI DEVIL CANYON OPERATION DOWNSTREAM TEMPERATURES -JAN TO APR OUTFLOW TEMPERATURE 4°C FIGURE 8 DEVIL CANYON DISCHARGE (CFS), JAN 10,480 FEB 10,090 MAR 9;>00 APR 8010 14900143.00 r -,-1 13700131.00 I I I I_L~l-.I_l _-.J I I I T"-,--' 119.00 /2500 RIVER MILE I _1 113 ()()10100101.00 APR 30 APR 15 ------------------------ MODEL ASSUMES DAILY BASED LONG TERM AVERAGE METeOROLOGICAL DATA AND MEAN MONTHLY FLOWS AT DEVIL CANYON 10 NOTE, 1.0 40 1.5 05 00 9500 l5 <> ~ Ul '"=> !.i 2.0rr Ul Q. '"Ul ~ 1.5 )J -J J )])1 J )J 1 J I j )-i 1 i DEVil CANyON DISCHARGE ICFS): OCT 7320 NOV 9440 VEC 11,130 JAN 10,460 1490014300 I I I I 137.00.310012500 V I 1 -.L_-L_.L-~L--l __l- 1J9001/3.0010700 I I I I I---r-I I I I I I OCT 15 10100 15 to 30 3.5 0.5 00 9500 40 w ~ ~ ::5 20.. :fw I- _2.5 u. NOTE: MODEL ASSUMES DAILY BASED LONG lERM AVERAGE MEHOROlOGICAl DATA AND MEAN MONTHLY FLOWS AT DEVil CANYON. RIVER MILE WATANA/DEVIL CANYON OPERATION DOWNSTREAM TEMPERATURES -OCT TO JAN OUTFLOW TEMPERATURES 4 TO 2°C !),'.I ( FIGURE 655 I )1 J ))]1 )])]1 1 40 DEVIL CANYON DISCHARGE (CFS): JAN 10,480 fE8 10,090 MAR 9200 APR 8010 / S~ ?>o 14900143.0013700131.00 L-i~~L I I I .L-I I I I I 101.00 10700 11300 11900 12~00 RIVER MILE ID 0:> 0.0 s~.oo !.>Z~ Q W '":J..... '"I APR 30w20 "-:l<w J APRI~... I.~ NOTE: MODEL ASSUMES DAILY 8ASED LONG TERM AVERAGE METEOROLOGICAL DATA AND MEAN MONTHLY FLOWS AT DEVIL CANYON. WATANA/DEVIL CANYON OPERATION DOWNSTREAM TEMPERATURES -JAN TO APR OUTFLOW TEMPERATURE 4 TO 2°C 7 .J I 12 FIGURE 8 ') -----------~---_.-----.~----_.-.----~--~---,--~----_.------------._----- SIMULATED RIVER TEMPERATURES at River Miles 130 and 84 1 ~l 'J 1 ]J j ]J }j ]1 »1 1 J 1 NATUeAL CONDITiONS ALASKA POWER AUTHORITY sus/rNA tiYLJROElECTflIC PROJECT SUSITNA RIVER TEMPERATURES AT RIVER MILE 130 NATURAL CONDITIONS A.N(I1UU.Cl.k."~,;" 5 m l I!~"'?"":$I~-'I!!'~".F-~: ~1 ~J j 'I ])]-J ~l .J J 1 1 J 1 ALASKA POWER AUTHORITY SUSITNA RIVER TEMPERA TURES AT AIVER MILE 130 WATANA FILLING .6J'4(H0kIt~.AL,As". I SUSiTNA HYOROElECTRIC PROJECT I m >< -·1 ~----l I ~""'"-""J _."~F-.-(')~~••._.---";U I 5 WATAtJA FILLINC{ ~() A.. \. \ • :\\,. :\L~~b:\' ,982 WE:ATM(;R DATA • 3 rd 5u MMEg FILLlfoJu -,-.-1991 Y-1Et\iHE~DA'-A \ 2 r4 5uf'AME~FILLltV4 \', - - - -1')82 NATueAl CotJDITIa..JS \ -••_'J_19a1 !-4ATueAL COt-,)DITIOrJ5 • ('\f\ f V \/-\ ;".\/ I I \ l :I'\.I I \../'.)1,-.' /_i (Vi 1\ ,//........', /,J.I'-,/\/.......j V : I /")I .' .J-/ . \ o -I 'I ,M~~.',J~N~,I,~U~y,I,,A~G;".Sf\T,'I ?<7;T.,\__ 30 35 40 +5 wATER..WEEK q 8 12.. II 10 w 6 Ol. :J ~S- OL UJQ.4 ~ LU~3 ~ ~E ~ I{)I '"00 7 '-..J J -1 J J 1 i )I 1 1 I )I 1 /CJLl0 DfMMJD 12 II 10 g B 7 ~ IJ 0 'J " III Ql. ~5 aL W 4- (L ~j ~.24.. IIIru t- V) 0 30 WfATH££CONDITlDlJ,s: -----1982 ----.-1'181 -----1'174- -"-"-\~11 MAY I JLJN£I JULY 35 40 45' WATER WEEK 5"0 52..\ -. 5 ALASKA POWER AUTHORITY SUSJTNA ~iYDnOElECTRIC PROJECT SUSITNA RIVER TEMPERATURES AT RIVER MILE 130 WA TANA OPERA T1NG ~m..il.·:("i.:bol:JGl_............,.........1.,,..,.-«lOYIIl I OJo'l I,........... NoCI-iOfU,(,(.AI..A.su. mx ::I: OJ -i o --,1 -1 J »-)J ]J 1 1 ]1 i 1 -1 2001 DEMAND WEATHER COND ITIOtJ.s : -------lqgZ -.-.-·-19~1 -----197.4- -..-.,-..-/971 10 2 12 1II w~7 ~ ~G UJ Q. ~5 ~4 ~ I.lJ 3 ~ '() ,...,'} V•........8 ALASKA POWER AUTHORITY SUSITNA HYOrlOELECTRIC PROJECT m )( ::I: OJ -I m SUSITNA RIVER TEMPERATURES AT RIVER MILE 130 WATANA OPERA T1NG .:xu.~ti..~(..i.:.~;;;.Ql _......_I ~''''''''.I.....""'(_'-~_,_--------~_I -----+='.."I "'_~"~I ANCHOA&(;(.&1.&'11" 5" OCT.o ~~IM~'("i J~_N';:i I I ~U.L V.I,I ~U~.I •~E r:'T",1 i 1 h 30 35 40 45 50 Sl., WATEr<yJ£~/( I ]I )1 I J J ]1 1 1 1 ] ALASKA POWER AUTHORITY ------\C)74- -••-••_.~1971 m ><:t til -t "TI AIo£~4l.ALas"a.•\.01011 'ltt_""'"r.o ~M.a·it:"t..~.;(j) ~~...\HtD I SUSITNA HYDROELECTRIC PROJECT SUSITNA RIVER TEMPERATURES AT RIVER MILE 130 WATANA AND DEVIL CANYON OPERATING 5 2002 DEMAND ':>2.50 /\ ./\\;A~\ ,//-./::..~~~"''\. ../",'"1--....-,.r "-,\"-..' '"..~\. "\\\\\. ..\\\\\ \_·_·--·,QR, WE:"'"tl-J~CONDI T ION.!: ------1<)92 40 45 WATER WEEK JULY I AUG. 35 MAY I JUN£ 12 II 10 9 8 ~7 }> '-..J W "Q! :J I-[i ~....~4 1 I~3 s;: <'2lU ~. r) 0 30 I J 1 I i I J J ,-1 1 J 1 i 2020 D EN\A).J D -," V ",- -::::.:'\\.~'\ \..\.~ \~.~.' \\\. \-\<~. '\\\\ \~ WEATHfE CONDIT10N3: \Q<62.. _.-.-,-l'1a'1 ------1974- _..__.._..-1'111 /\/\i //-. .~ /I.;-" .,/;; .// ,~/: /j / /../., / //./: --:"-,.----/ .' / I~1 II 10' C1 -U 8 •-7 w Cll:."f?,0 q: ea::: UJ 5 n !4 I- ~3 UJ ~'()2 ALASKA POWER AUTHORITY WATER WEEr( _______~'!~!.~IIY~iOELECTRICPROJECT,r SUSITNA RIVER TEMPERATURES AT RIVER MILE 130 WATANA AND DEVIL CANYON ~ OPERATING ~ '"-",""':..',:U,,,'>:;<Ql t !!?-=:~~~I -lc.oll lft_oM.NO Al<HUfU.(".(,AL ...s-......0 552..I5045"40roC:)J o ~iM~'\,I i J UN,£i I I ~U ~Y,I I A,U~.iii -r-'\"iii ~-I " \h JJ i J I ]--]1 .]1 J )J 1 1 J ALASKA POWER AUTHORITY \\ NA.TURAL.C.ONDITIONS 12 ~ II I 10 q B 7 /\b oV .........J ~sj .'V ..~I WEAT\-i~£CONDITIONS:./'-., /19caZ t-4 -----lgBI ~3 J / ----llj74- <-..-..-l'r11 k.A Itti 2..J .. SUSITNA RIVER TEMPERATURES AT RIVER MILE 84 NATURAL CONDITIONS t.NCHOfU(j,(.4 ...5"... mx I--IOJ -l I._=~-"'c.."'c.,~r.~.-.w'"1"'_~c ~.I_.__...,.......- I-----~_·_----- SUSITNA ~IYOROELECTRIC PROJECT 5504045 WATER.W~£K o -t r.,M ~"(I I 1"J ~N1£ ,I,~U~~~I ~u,:,.,I i -,-',",I \,-i "1 f..- 30 35 1 ~I ])J -I 11 i J J J 1 J ) 12 ALASKA POWER AUTHORITY SUSITNA tlYDROELECTRIC PROJEC-:-Te-_ SUSITNA RIVER TEMPERATURES AT RIVER MILE 84 WATANA FILLING ~~·~i.I..~..,,~ m x I,~--J ~....-~....,,~.-l;;:~"~-~;~---~ AN:"HOAJ.c.[.At,ASII.A I u.t 5 WA,ANA FIL.L1Nq 50404-S" WAIER 'l-JEEK LE4 END : \qgf WEATHE~DATA.- 3 rJ "UN\NlE~FILLlNq -.-.-,gal VJE"ATHEe DATh \,\ z'CJ .5UMME~FlLLIt-J4 ;\\ - - - -19%2.NATUI<AL CGt-JDtTION5 \\\ _.•-.•-\~'ll'W>.TU~l CONDITIOtJ.5 ~_\ \ .".-('"'-..•\"~. \.. 35 o 1 ~f1 ~'\r1=y J~N~tit ~U~Vi ~f AiU~."I -,-. I -.i 'I , \i h 30 7 ;0 II 9 lJ IlL ::l G I-< Ol.5 lU ~ ~4~ ~3 ~2 '-rI) ~ <J B•v )1 )1 J J ]-,j B -J ]1 i c... m X ::I: m -l ALASKA POWER AUTHORITY SUSITNA RIVER tEMPERATURES AT RIVER MILE 84 WATANA OPERATING ~:ll.'U.·:U,,__>~I--~"-r--""_·1 ~ --.......--(,.all .t.I£!iOAAGE.&lIllS!U. I SUSITNA tlYDnOELECTAIC PROJECT I s- I'1CJ£:P DEMAND 50 JULY AUG_,, iii i :i ,0 i 4?40 ""AI £~"'-lEEK JUN£ 35 0-\'MAYi,,.«30 .Iii i \2 I 1 10 /"""\9 (J !!J B W t\I.7.J I~rPnl ,, lU '.ICl.. ~5 WEAl"Hf;R CONDITiONS: I.u ./"'1382l-., 4 /-.---'C}8 I 2 "~------\0,74</w '3 -"---'-l~(I Olr- l/)2 j J j J J ]1 J 1 )i J 1 -1 J -] SUSITNA HYOROELECTRIC PROJECT I ALASKA POWER AUTHORITY SUSITNA RIVER TEMPERATURES AT RIVER MILE 84 WATANA OPERATING mx I-I~~~.i..~~il.~;..tl CD_1-""'..I.F'01II),;(g -.."r.;;-~'~-f"M:tfIORA,c.a:,.II,lA51Jl& A './\ 2.00 I DE MAND AUG.JULY 4-0 45 WATE~WEEK' 35" o-H ,M~~i'iJ~N~,11 t ii',iii I I ,-I-30 ' ,iii Iii i 12 \1 \0 r-g U 0 -.I 8 10 Qi i ~<o -Il£ lu Q. ~5 -IV ~/,I Wf.ATHE'R CONDI rlDNs : ~19"52.'". ~4 /-.-.-''l-Sl i(.----1~74 ill /O.l 3--"-"-1~71 i- ll)I .- 2 1 J J )J "J )J 1 J "J 1 "..))]1 12 1II I /0 't "\J 8•........ .....7~ ::) t- ~ 'fj)~! Q: O! LU 0-S~w Y o.r y-/~:~ ]-/lu ex: l- Vl l 2002 DEMAND WERTHER CONDITIO"I,· I'H3l I 'U3 I ---~~-ICJ 1J.t-"--,q" ALASKA POWER AUTHORITY ;;::L.'.~.£-~"b.;u:)~ -'-~.....'~.~7"-1~:c:'.:-'-----'I"'----~ AHCHQAA,U.Al.I\S".t;,[ SUSITNA HYDROElECTRIC PROJECT SUSITNA RIVE-R TEMPERATURES AT RIVER MILE 84 WATANA AND DEVIL CANYON I ~ •I OPERATING ! OJ -f r- 51[fO V\/A'TtrR wEEK 35 40 45 o +--t ,M~'(I I I J ~N ~; I I ~U,L '\l I ~u~.i I •~E ~r:i I.,07-To,~ 30 J j 1 ]j )J J ]J ~~]] m )( :I: W -t ;: SUSITNA HYDROELECTRIC PROJECT ALASKA POWER AUTHORITY SUSITNA RIVER TEMPERATURES AT RIVER MILE 84 WATANA AND DEVIL CANYON OPERATING AHCH(lRA6l.AL"S~" ~~.l,..:I:il.i~;c;r.l· -'-......J ••••__.l_I)wtO _. L J"I '//". .". \\\ \r~.\ k \...../ Df"MRND so 2020 '"15''10 WAI £'fC 'NE"EK V\lE'ATHi:R CQNO IT ION~; 1'18 Z -.----IGa I -----IQ7't _.._..-Iq71 1Z1II I /0,..., U 1•...., #w Q::' F!7ceex: L.I.\&> jP/-! a. ~ ~ .-~/UJ ((, 3~/l- n .. Z I I MAY(J . )~30 SIMULA TED RIVER TEMPERATURES Natural Conditions EXHIBIT N ".,.. STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1971 NATURAL CONDITIONS WATER WEEK NO •..... River May June July ....Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 184 1/1.0 2.8 4.4 4.6 4.2 9.6 7.8 10.4 11.3 10.3 12.6 9.0 8.2 173 0.8 2.6 4.1 4.3 4.1 9.3 7.6 10.2 11.1 10.2 12.6 9.1 8.3 162 0.6 2.6 4.3 4.5 4.2 9.4 7.7 10.3 11.2 10.4 12.8 9.2 8.4 150 1,./0.6 2.7 4.3 4.5 4.3 9.4 7.8 10.4 11.3 10.5 13.0 9.5 8.7 140 0.7 2.8 4.4 4.6 4.3 9.3 7.8 10.4 11.3 10.6 13.0 9.6 8.8 130 0.9 2.9 4.5 4.6 4.4 9.2 7.7 10.3 11.2 10.5 12.9 9.5 8.8 120 1.0 3.2 4.8 4.9 4.5 9.4 7.8 10.5 11.4 10.7 13.2 9.7 8.9 110 1.1 3.5 5.0 5.1 4.6 9.6 7.9 10.7 11.6 10.8 13.4 9.8 9.1 99 l.l 1.3 3.7 5.3 5.4 4.8 9.7 8.0 10.8 11.7 11.0 13.6 9.9 9.2 98 !if 1.8 3.4 4.6 4.8 4.5 8.6 7.3 9.4 9.9 9.2 10.9 8.5 7.8 84 i/2.0 3.7 4.9 5.2 4.8 9.0 7.7 9.9 10.6 9.7 1l.5 8.8 8.1 - WATER WEEK NO.-River August September October Mile 44 45 46 47 48 49 50 51 52 1 2 3 4 184 1/10.7 10.6 10.7 9.3 8.6 6.3 5.9 4.8 2.8 1.2 0.0 0.0 0.0 173 10.7 10.6 10.6 9.4 8.7 6.4 6.0 4.9 2.9 1.3 0.1 0.0 0.0 r- 162 10.9 10.7 10.7 9.5 8.8 6.5 6.1 5.0 2.9 1.3 0.1 0.0 0.0 150 1.111.1 10.9 10.9 9.7 9.0 6.7 6.3 5.2 3.1 1.5 0.3 0.0 0.0-140 11.2 11.0 11.0 9.8 9.1 6.8 6.4 5.3 3.2 1.6 0.3 0.0 0.0 130 11.1 10.8 10.9 9.7 9.0 6.9 6.4 5.4 3.3 1.7 0.5 0.0 0.0 120 11.3 11.0 11.0 9.9 9.2 6.9 6.5 5.5 3.3 1.7 0.5 0.0 0.0 110 11.5 11.1 11.2 10.1 9.3 7.0 6.6 5.6 3.4 1.8 0.5 0.0 0.0 99 1/11.7 11.3 11.3 10.2 9.5 7.1 6.8 5.8 3.5 1.8 0.6 0.0 0.0 98 !i/9.8 9.8 9.8 8.8 8.2 6.4 6.0 5.2 3.4 2.2 1.6 0.6 0.0-2.110.284 10.4 10.2 9.2 8.5 6.6 6.3 5.4 3.6 2.4 1.8 0.5 0.0 .1/Downstream of Watana Dam site....2../Downstream of Devil Canyon Dam site :1/Upstream of Susitna -Chulitna confluence !i/Downstream of Susitna -Chulitna confluence (full m1x1ng assumed) i/At Sunshine stream gaging station at Parks Highway Bridge 420723-840817 1 1 1 J J ]1 -,1 1 J J 1 MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 3435 3637 38 39 4041 424344 454647 484950 51 52 NOTES: 1.TEMPERATURES IN ·C . ... \on .. ... '" ... ...I j"LJ I.. ... aD"~ I...~ oil :; p =:e ... ;; = ::. e )!t~J ~1 \. n\· "<:..... ... .. 190 WATANA:J II" 1M II I I 170 160 DEVIL CANYON 150 (f) w ~ ~140 GOLD ItN- n::CREEK w 130> n:: 120 I/O CHULITNA .!22....- 90 80 TIME NATURAL CONDITIONS ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT SUMMER 1971 CLIMATE DATA ARCTIC ENVIRONMENTALllXl&OO{£~=~!ID&~""'O' INFORMATlOIt AND DATA "~ CENTER SUSITNA JOINT VfNTURf 1 I -1 I I 1 J -I J 1 1 1 ) MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 1 2 3 4 5 G 7 8 9 10 II 12 13 14 15 16 17 18 192021 22 23 24 25262728 29 30 DEVIL CANYON NOTES 1.TEMPERATURES IN °C. 2.APPROXIMATE LOCATION OF ICE FRONT FROM RIVER ICE SIMULATION PLOTS. SIMULA TED TEMPERAT- URES FOR MARCH AND APRIL SHOULD NOT BE USED. 3.ICE FRONT PROGRESSION UPSTREAM OF RIVER MILE 139 NOT MODELED FOR NATURAL CONDITIONS 80 190 I 1"(-I 180 )I...... \'170 160 \~...<>- 150 I '"--'::::>J 140 /'-------)/' 30 II•..""/\ ,"--APPROXIMATE LOCATION , I OF ICE FRONT I /it I NOV DEC JAN fEB MAR APR 1 GOLD CREEK WATANA CHULITNA' 0:: W > 0:: (f) W -l :i: TIME NATURAL CONDITIONS WINTER 1971-1972 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC ENVIRONMENTAL I[}(]/AOO57 Ji\=~IIDJi\l&>"""5' INFORMATION AND DATA &/Al 0 /Al~ CENTER SUS'TNA JOINT VENTURE EXHIBIT 0 STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1974 NATURAL CONDITIONS WA TER WEEK NO. River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 18411 5.1 5.7 6.3 9.9 9.9 8.3 9.6 9.6 10 .5 10.4 10.0 10.3 9.9 162 5.3 5.6 6.1 9.5 9.7 8.3 9.6 9.7 10.7 10.6 10.1 10.6 10.1 150.6.1 5.2 5.6 6.1 9.4 9.6 8.3 9.7 9.8 10.9 10.8 10.3 10.8 10.4 140 5.3 5.6 6.1 9.3 9.6 8.4 9.8 9.9 11.0 10.9 10.4 10.9 10.5 130 5.6 5.7 6.1 9.1 9.4 8.3 9.7 9.8 10.9 10.8 10.3 10.8 10.5 120 5.9 5.9 6.3 9.4 9.7 8.5 10.0 10.1 11.3 11.1 10.6 11.1 10.7 110 6.3 6.1 6.4 9.5 9.9 8.7 10.3 10.4 11.6 11.4 10.7 11.3 10.9 98 1:.1 5.4 5.5 5.9 8.5 8.7 7.6 8.6 8.6 9.1 9.1 9.0 9.3 9.0 84 l/5.7 5.8 6.2 8.9 9.2 8.0 9.2 9.1 10.1 9.7 9.4 9.8 9.5 WATER WEEK NO. River August September October Mile 44 45 46 47 48 49 50 51 52 1 2 3 4 5 184.!.1 10.1 10.0 9.9 7.2 8.9 8.2 6.3 5.3 3.6 0.0 0.0 0.0 .0.0 0.6 162 10.4 10.3 10.1 7.5 9.1 8.4 6.6 5.4 3.7 0.0 0.0 0.0 0.0 0.0 1502.1 10.6 10.5 10.3 7.7 9.3 8.5 6.8 5.7 3.9 0.0 0.1 0.0 0.0 0.1 140 10.8 10.6 10.5 7.8 9.4 8.6 6.9 5.8 4.0 0.0 0.1 0.0 0.0 0.0 130 10.7 10.6 10.4 7.9 9.4 8.6 7.0 5.8 4.1 0.1 0.2 0.0 0.1 0.0 120 11.0 10.8 10.7 8.1 9.6 8.8 7.2 6.0 4.1 0.0 0.2 0.0 0.0 0.0 110 11.2 11.1 10 .9 8.2 9.8 8.9 7.4 6.1 4.2 0.0 0.2 0.0 0.0 0.0 98 l/9.3 9.2 9.0 7.0 8.4 7.7 6.4 5.5 4.2 0.9 1.2 0.7 0.9 0.7 84 !il 9.8 9.7 9.5 7.4 8.8 8.1 6.8 5.B 4.4 0.9 1.3 0.7 1.1 0.9 ",.. II Downstream of Watana Dam site 1:.1 Downstream of Devil Canyon Dam site :11 Downstream of Susitna -Chulitna confluence (full m1x1ng assumed) !±I At Sunshine stream gaging station at Parks Highway Bridge ~ 420723 840817 1 1 --.J J 1 1 1 .~J 1 1 )J MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 34353637 38 39 4041 424344 454647 484950 51 52 NOTES: 1.TEMPERATURES IN ·C. ..I ... en II {T~8 '~l~ Q ;; 190 Jtli ~())WATANA~ 180 C> 170l )\!(It 160 DEVIL CANYON 150 (f) w -.J 140~GOLD CREEK0:: 130w > n: 120 110 100CHULITNA 90 80 TIME ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT NATURAL CONDITIONS SUMMER 1974 CLIMATE DATA ARCTIC fNVIRONIoIENTAlllXl&/fJ'7J ~=RIOl~~~INfORMATION AND DATA [b{?:"151${?:,,~~ CENTEII SUSITNA JOINT VENTURE --J 1 1 J J I j J ]B j J j 1 MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2.3 4 5 6 7 8 9 10 II 12 13 14 15 16 17 18 19 20 21 22 23 24 2526 27 28 29 30 NOTES 1.TEMPERATURES .IN ·C. 2.ICE SIMULATION NOT MADE FOR THIS CASE. TEMPERATURES FROM NOVEMBER THROUGH APRIL SHOULD NOT BE USED.NOTE SIMILARITY TO NATURAL CONDITIONS FOR 1971-1972 WINTER. I I I I I I I I I I I I I I I I I I I I I I I I I I I 1 I190 ,---:-- \I--\i180- ...•N 170-1 160-I \"'..... '"-.. 150- 1..I140- ,-, 130- -4 If'...-I 120-o'j I 1....../10 - 100-~J j~- ~j 90-........-_.... 80 fi s lP-OCT (1lI0v DEC JAN FEB MAH IA ~A . GOLD CREE CHULITNA WATANA (f) W -I ~ DEVIL CANYON 0::: W > a:: TIME ALASKA POWER AUTHORITY SUSITNA HYDROElECTRIC PROJECT NATURAL CONDITIONS WINTER 1974·1975 CLIMATE DATA ARCTIC ENVIRONMENTAL IMfV.fEl5J IV-=RfElIV-liM'w<)' INfORMATION AND DATA lI1Jll-\lrIl&/Al lSl2JLN~ CENTER SUSIlNA JOINT VENTURE EXHIBIT P j I 1 1 1 1 1 )J 1 1 ....j j J J J MIDDLE SUSITNA RIVER-ISOTHERMS WATER WEEKS (PLOTTED AT MID~WEEK) 4950 51 52 I 2 :3 4 5 6 1 8 9 10 II 12 13 14 15 16 17 18 192021 22 23 2425262728 29 30 190 I ' ,'.1 , I I I I , ,'.I , , I ,,I ,I I If I I I 'I I I.I I I I I , NOTES f 11'1.TEMPERATURES IN ·C. j 1/1 2.APPROXIMATE LOCATION I I OF ICE FRONT FROM\\11 RIVER ICE SIMULATION(I \PLOTS. I 'I~'3.ICE FRONT PROGRESSION _...UPSTREAM OF RIVER I I MILE 139 NOT MODELED\1)FOR NATURAL f'(CONDITIONS l1i ~III (t-I qll P.IJ/l 1('v fl l i \il APR ~... APPROXIMATE LOCATION 1 ,..--1."-- ..1t ~OF ICE FRONT/t>~_-" / / ( I I, I., I NOV DEC I JAN I FEB I MAR ... 170 WATANA 180 160 DEVIL CANYON 150 (/) w ...J I ,.. ::E 140 GOLD CREEK I ...a::w 130> n:: 120 110 CHULlTNA,IOO 90 TIME ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT NATURAL CONDITIONS WINTER 1976·1977 CLIMATE DATA ARCTIC ENVIRONMENTAL 11}{J1J\!ro<;;>IV =~IID IV ~"""B'INfORMATION AND DATA if,<I'\l 0 {,;\~ CENTER SUS'TNA JOINT VENTURE EXHIBIT Q ~ STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1981-NATURAL CONDITIONS WATER WEEK NO •..... River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 44 184l./4.8 7.6 8.6 8.2 9.2 8.9 11.6 12.2 8.5 8.4 9.2 9.5 9.8 9.4.-173 4.8 7.4 8.2 7.9 9.1 8.7 11.4 12.1 8.6 8.5 9.2 9.5 9.9 9.5 162 4.9 7.5 8.4 8.1 9.3 8.8 11.6 12.3 8.7 8.7 9.3 9.6 10.0 '9.6 150.1/5.0 7.6 8.3 8.1'9.3 8.9 11.6 12.4 9.0 8.9 9.5 9.9 10.2 9.9 140 5.1 7.6 8.3 8.1 9.4 8.9 11.6 12.5 9.1 9.0 9.5 9.9 10.3 10.0 130 5.1 7.5 8.2 8.1 9.4 8.8 11.5 12.3 9.1 9.0 9.4 9.9 10.3 10.0 120 5.3 7.7 8.4 8.4 9.7 9.0 11.7 12.6 9.3 9.3 9.6 10.1 10.5 10.2 110 5.5 7.9 8.6 8.6 9.9 9.1 11.9 12.8 9.6 9.5 9.7 10.2 10.7 10.4 99 1/5.7 8.0 8.8 8.9 10.1 9.3 12.1 13 .1 9.8 9.7 9.9 10.4 10.9 10.6 ""'.,98 !i/5.0 7.2 7.9 7.8 8.8 7.7 9.5 10.2 8.5 8.6 8.8 9.1 9.5 9.3 84 2/5.2 7.5 8.3 8.2 9.4 8.0 10.0 10.7 9.0 9.1 9.1 9.5 9.9 9.8 1 J )1 B j J J 1 )I J 1 .]I i .. MIDDLE SUSITNA RIVER ..ISOTHERMS NOTES: 1.TEMPERATURES IN ·C. ..... II 2.::=I 1= ;; N ..-... WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 3435 3637 38 39 4041 424344 454647 484950 5\52 190 -t I .I I I I I I I I I I L i I I I I I I I I WATANA I .--.1 .....1,.I ._.' 180 1111 1/11/\\1111 I ~\llll\\.!. • 170 160 DE VIL --rr--CANYON I I ... 150 (I)w -.J 140~GOLD ....- a::CREEK w 130 > 0: 120 110 100CHULITNA 90 80 TIME NATURAL CONDITIONS SUMMER 1981 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC ENVIRONMENTAL IfUl f1.1ol'7J f1.=r<?Iolf1.~ INFORMATION AND DATA lI\Jl.".llN&l.".l lSl£llAl~ CENTER SUSITNA JOINT VENTURE --I 1 ]J )]J -1 -J 1 J 1 MIDDLE SUSITNA RIVER -ISOTHERMS WATANA DEVIL CANYON NOTES: 1.TEMPERA TURES IN ·C. 2.APPROXIMATE LOCATION OF ICE FRONT FROM RIVER ICE SIMULATION PLOTS. 3.ICE FRONT PROGRESSION UPSTREAM OF RIVER MILE 139 NOT MODELED FOR NA TURAL CONDITIONS WATER WEEKS (PLOTTED AT MID-WEEK) 495051 52 I 2 '3 4 5 G 7 8 9 10 II 12 13 14 15 16 17 18 192021 22 23 242526272829 30 I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 190 - '"I , Tnn180- nHl{... 170-)\\lJ II 160-ItI\q -.."'"'"f-.~l~\t150- I)/1)/)...~N 140-I ---r'1,../ 1/1///' 30--//.~It......1 ~,"""1...-APPROXIMATE LOCATION20- llf'lrtI I OF ICE FRONT 10-~...I Ij ,JLi))I JIIIII (00-V I J D I D {lii!~90-1 cr ~- 80 BE 1/\OCT NOV DEC JAN FEB MAf \A l~~!( GOLD. CREEK CHULITNA· a: UJ > a: (f) UJ .J ~ TIME ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT NATURAL CONDITIONS WINTER 1981·1982 CLIMATE DATA ARCTIC ENVIRONM£NTAll []{]&~.7JIf.=[glIDlf.~~INFORMATION AND DATA Chv-l 0 v-l~ .CENTER SUSITNA JOINT VENTURE ..- ..- - ... EXHIBIT R - STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1982 NATURAL CONDITIONS WATER WEEK NO. River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 44 1841/5.5 4.9 7.2 7.1 8.8 9.2 8.0 9.6 11.9 10.2 10.6 10.6 9.7 10.5 173 5.2 4.6 6.8 6.7 8.5 8.9 '7.9 9.5 11.7 10.2 10.7 10.7 9.7 10.6 162 5.5 4.7 6.9 6.9 8.6 9.0 8.0 9.6 11.8 10.4 10.8 10.9 9.8 10.7 1501/5.4 4.7 6.8 6.8 8.6 9.0 8.1 9.7 11.9 10.5 11.0 11.1 10.1 10.9 140 5.4 4.7 6.8 6.7 8.5 9.0 8.1 9.7 11.9 10.6 1l.1 11.2 10.1 11.0 130 5.5 4.7 6.7 6.6 .8.4 8.9 8.0 9.6 11.8 10.6 11.1 11.2 10.0 11.0 120 5.9 4.9 6.9 6.8 8.6 9.1 8.2 9.9 12.0 10.9 11.3 11.5 10.2 11.2 110 6.2 5.1 7.1 7.0 8.8 9.2 8.3 10.0 12.2 11.1 11.5 11.7 10.4 11.4 99 1/6.6 5.3 7.3 7.2 9.0 9.3 8.5 10.2 12.5 11.4 11.7 12.0 10.6 11.7 98 !±/5.8 4.9 6.7 6.6 8.1 8.3 7.4 8.6 10.5 9.3 9.6 10.0 8.8 9.7 84 2/6.1 5.2 7.0 6.9 8.4 8.6 7.6 9.0 11.0 9.8 10.1 10.5 9.3 10.2.- WATER WEEK NO. River August September October-Mile 45 46 47 48 49 50 51 52 1 2 3 4 5 1841/10.5 10.5 10.5 9.0 7.6 6.1 6.4 4.1 2.0 0.0 0.0 0.0 0.0 173 10.6 10.6 10.6 9.1 7.6 6.2 6.3 4.1 2.1 0.0 0.0 0.0 0.0 .-162 10.8 10.8 10.7 9.2 7.7 6.3 6.4 4.1 2.1 0.0 0.0 0.0 0.0 1501./11.1 11.0 10.9 9.4 7.9 6.5 6.6 4.3 2.2 0.2 0.0 0.0 0.0 140 11.2 11.1 11.0 9.5 8.0 6.6 6.6 4.4 2.3 0.2 0.0 0.0 0.0 130 11.2 11.0 11.0 9.5 8.0 6.7 6.6 4.4 2.3 0.3 0.0 0.0 0.0 120 11.5 11.2 11.3 9.7 8.1 6.8 6.7 4.5 2.3 0.2 0.0 0.0 0.0 110 11.7 11.4 11.5 9.9 8.3 6.9 6.7 4.5 2.3 0.2 0.0 0.0 0.0 99 1/12.0 11.6 11.8 10.1 8.4 7.1 6.8 4.6 2.3 0.1 0.0 0.0 0.0 98 !±/9.6 9.1 9.4 8.0 7.3 6.3 5.6 4.4 2.5 0.8 0.2 0.0 0.0 1"""84 '2../10.1 9.7 9.9 8.5 7.6 6.6 5.8 4.5 2.6 0.8 0.0 0.0 0.0 1/Downstream of Watana Dam Site 1./Downstream of Devil Canyon Dam Site l/Upstream of Susitna -Chulitna confluence !±/Downstream of Susitna -Chulitna confluence (full m1x1ng assumed) ,~'if At Sunshine stream gaging station at Parks Highway Bridge 420723 840817 -------~~..~_._,-------_. 1 ))J J I J I )]1 J J J 1 1 )J MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 3435 36 37 3B 39 40 41 42 43 44 45 46 47 48 49 50 SI 52 NOTES: 1.TEMPERATURES IN ·C. I....I ..... ill!r :::::: u :: ~ WI'I=; .. 1\ "'... mIll)f\l \n(I 0. \0 ... 170 160 90 110 120 150 140 GOLD, CREEK 130 190 I I J I I I I I I I I ! , I , , I , ,I I I t I i I WATANA 180 80 "IV',",I I I I 1\'"'\II'I I I V\I Y )I I c4,\.f I 1.!r\br D \I DEVIL CANYON~ 0: W> 0: (f) W -J :E TIME NATURAL CONDITIONS ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT SUMMER 1982 CLIMATE DATA ARCTIC ENYIRONMEHTAlllXl&OO5J&=~[ID&~l1'>try INfORMATION AHO DATA &0 ~ CENTER SUSITNA JOINT VENTURE J I J )1 1 -1 1 1 ))1 1 MIDDLE SUSITNA RIVER-ISOTHERMS ~IIi I \gj! \/llll J!I fII ,-I J1111 ilm ')\llf j 1 ($ I l I /1 11 ),Ill( (..)11~11,v 'I I \III MAR~APRFEBJAN ICE FRONT (APPAOX.) ,,/ DEC SIMULATED ICE ·FAONT (APPROX.). NOV WATER WEEKS (PLOTTED AT MID~WEEK) 49 50 51 52 I 2 3 4 5 6 7 8 9 10 II 12 13 14 15 16 17 18 19 20 21 22 23 24 2526 27 28 29 30 190 ~.I I I I I I II I I I I I I I I I I I I I I I 11 I I I I I I I , I I'1 1 ,NOTES 1.TEMPERATURES IN ·C. 2.APPROXIMATE LOCATION OF ICE FRONT FROM RIVER ICE SIMULATION PLOTS. SIMULATED TEMPERAT- URES FOA MARCH AND APRIL SHOULD NOT BE USED. 3·ICE FRONT PROGRESSION UPSTREAM OF RIVER MILE 139 NOT MODELED FOR NATURAL CONDITIONS WATANA 160 170 160 DEVIL CANYON 150 (.f) w ...J I I I '" ~140 GOLD a:::CREEK w 130> a::: 120 /10 l \)1 CHULITNA 100 -[( ::1~p TIME NATURAL CONDITIONS ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT WINTER 1982-1983 CLIMATE DATA ARCTIC ENVIRONMENTAL I(}{)~OO{££""~®~~ INfORMATION AND OATA 0 CENTER BUSHNA JOINT VENTURE SIMULA TED RIVER TEMPERATURES Watana Filling EXHIBIT S --~l '}--l --1 ---1 ~--]--)-1 "J ]-)))-J )J .~ MIDDLE SUSITNA RIVER -ISOTHERMS 2.APPROXIMATE LOCATION OF ICE FRONT FROM RIVER ICE SIMULATION PLOTS. 3.ICE FRONT PROGRESSION UPSTREAM OF RIVER MILE 140 NOT CONSIDERED ACCURATE FOR FILLING CASE .., ~ APRMARFEBJAN ,.) I I DEC APPROXIMATE OF ICE - ... 170 180 WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 5/52 J 2 3 4 5 6 7 e 9 10 "/2 13 /4 15 16 17 '8 19 20 21 22 23 24 25 26 27 28 29 30 190 -l I I I I I I I i I I I I I J I I I I I I I I I I ·1 I I I I I I I ~ II I I I I NOTES 1.TEMPERATURES IN °C. 160 WATANA DEVIL CANYON ISO U) W 1\J ~I tit-' :::::140 GOLD CREE"j """"(> a::w 130 1> a:'m .... 120 1 110 l\i" CHULITNAIOO 90 80 11S!p TIME ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT WATANA FILLING.1991-1992 1st WINTER WINTER 1982·1983 CLIMATE DATA ARCTIC £NVIRONM£NTAlllUl if.1Ol'7J if.=~1Dl if.~""1J INFORMATION AND DATA UUL'-.l\nlLf,L;!LSl£)L'-.I~ CENTER SUSITNA JOINT VENTURE EXHIBIT T )J )J J J J j )1 1 J i ~ MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 190 I I I I I,I I I I,I I I I i I I I I I.I.I I I TIME WATANA FILLING,199~ 2nd SUMMER SUMMER 1981 CLIMATE DATA NOTES: 1.TEMPERATURES IN ·C. ALASKA POWER AUTHORITY SUSITNA HYDROelECTRIC PROJECT ARCTIC ENVIRONMENTAL IOOL!lOOl&L!l =R!IDL!l~~ IHFORMATIONAHD DATA LS"~ CENTER SUSITHA JOINT VEHTURE • EXHIBIT U J ]1 ~I J )J J ]I 1 1 I B 1 MIDDLE SUSITNA RIVER -ISOTHERMS pMARFEBJAN I LOCATION I I FRONTcY / / / / .--- ( I I DEC APPROXIMATE OF ICE 22 23 24 2526 2728 29 30 i I I I I I I I I I I I I I I I I I I I I I I I I "I I I I I I I ~NOTES,i i 1 •I _ )1 1.TEMPERATURES IN 0 C.I'\/f\2.APPROXIMATE LOCA nON OF ICE FRONT FROM RIVER ICE SIMULA nON PLOTS. 3.ICE FRONT PROGRESSION UPSTREAM OF RIVER MILE 140 NOT CONSIDERED ACCURATE FOR FILLING CASE WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2 3 4 5 6 7 8 9 10 "12 13 14 15 16 /7 18 19 20 21 TIME WATANA FILLlNG,1992-1993 2nd WINTER WINTER 1981·1982 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC ENvtRONMENTALllXl&[Rl~&=~[ID~~0'6' INfORMATION AND DATA 0 ~ CENHR 9U91TNA JOINT VENTUAE EXHIBIT V STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1982 THIRD SUMMER OF FILLING (1993)~1 WATER WEEK NO. River May June July Mile 31,Q/32 33 34 35 36 37 38 3921 40 41 42 43 18411 2.3 2.4 2.7 3.1 3.6 4.1 4.7 5.3 5.7 5.6 6.9 8.7 8.6 173 2.5 2.4 2.6 2.7 3.6 4.3 4.9 5.7 6.2 6.2 7.4 9.0 8.8 162 3.0 2.7 3.2 3.4 4.4 4.8 5.2 6.1 6.6 6·.5 7.7 9.3 9.0 1501,.1 3.3 2.8 3.3 3.4 4.5 5.0 5.5 6.4 7.0 7.0 8.1 9.6 9.3 140 3.5 3.0 3.4 3.5 4.7 5.2 5.6 6.6 7.3 7.3 8.4 9.9 9.4 130 3.9 3.2 3.7 3.8 4.9 5.3 5.7 6.8 7.6 7.6 8.5 9.9 9.3 p~ 120 4.4.3.5 4.2 4.3 5.5 5.8 6.1 7.2 8.1 8.0 8.9 10.3 9.5 110 4.9 3.8 4.7 4.8 6.0 6.1 6.3 7.6 8.5 8.4 9.3 10.6 9.8 99 11 5.4 4·.1 5.1 5.2 6.5 6.5 6.6 8.0 9.0 8.8 9.6 10.9 10.0 98 !il 5.1 4.1 5.2 5.3 6.3 6.6 6.2 6.9 8.5 8.0 8.3 9.2 8.3 84 :2/5.5 4·.6 5.9 6.0 7.3 7.6 6.7 7.8 9.6 8.8 9.1 9.9 8.9- -River August September Mile 44 45 46 47 48 49 50 51 52~1-18411 8.8 8.9 8.5 8.9 9.0 9.4 9.6 8.7 7.7 173 9.0 9.2 8.7 9.1 9.1 9.1 9.1 6.7 6.0-162 9.2 9.4 8.9 9.3 9.2 9.2 9.1 6.7 5.7 1501:/9.6 9.8 9.2 9.6 9.4 9.2 9.0 6.4 5.4 -140 9.7 10.0 9.4 9.7 9.5 9.2 8.9 6.4 5.2 130 9.7 10.1 9.5 9.9 9.5 9.0 8.7 6.1 5.0 120 10.1 10.4 9.8 10.1 9.7 9.1 8.7 6.3 5.0 110 10.4 10.7 10.0 10.4 9.9 9.2 8.8 6.4 5.0 99 11 10.7 11.1 10.3 10.7 10.1 9.3 8.9 6.5 5.0 98 !il 9.0 9.1 8.7 9.1 7.8 7.6 7.0 4.9 4.5 ~84 11 9.8 9.7 9.3 9.7 8.4 7.9 7.0 5.4 4.5 11 Downstre~lm of Watana Dam site 1:/Downstream of Devil Canyon damsite 11 Upstream of Susitna -Chulitna confluence !il Downstream of Susitna-Chulitna confluence (full mixing assumed).... 420723 840817 ,.,.. .-' - ,..., I • At Sunshine stream gaging station at Parks Highway Bridge Unit one scheduled on-line (License Application Fig C.l) Unit two scheduled on-line (License Application Fig C.l) Unit thrE~e scheduled on-line (License Application Fig C.l) Third T,t7inter of filling not simulated.Powerhouse would be operational and temperatures would be similar to natural conditions. The stream temperatures simulated for the third summer of filling were computed assuming reservoir outflow through the mid-level outlet works as shown i~n Appendix IV.The construction schedule shown in the License Application indicates units 1 and 2 would be operational by April 1 and July 1 1993,respectively.Thus,some reservoir outfloW'would be through the powerhouse,and the reservoir outflow temperatures would be warmer than shown in Appendix IV.Stream temperatures would also be warmer than shown here. 420723 840817 )1 J 1 J )1 c 1 -1 1 1 1 -}I MIDDLE SUSITNA RIVER -ISOTHERMS NOTES: 1.TEMPERATURES IN ·C. ... ... • .. WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 34 35 36 31 38 '39 40 41 42 43 44 45 46 41 48 49 50 51 52 190 WATANA 180 110 160 DEVIL CANYON 150 en W -.J ::E 140 GOLD 0::CREEK W 130 > 0:: 120 110 CHULITNA 100 90 I~ 80 TIME WATANA FILLING,1993 3rd SUMMER SUMMER 1982 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROelECTRIC PROJECT ARCTIC.ENV.IRONMENTAll [){]&OO77 ~=~®~(O)0>'o" INFORMATION AND DATA (bt,;j IS D t,;j~ CENTER SUSITNA JOINT VENTURE SIMULA TED RIVER TEMPERATURES Watana Operating • EXHIBIT W STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1971 ENERGY DEMAND:1996 WATER WEEK NO. River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 ~18411 2.5 2.4 2.4 2.4 2.4 2.4 2.9 3.6 5.3 6.2 7.0 7.5 7.5 162 2.3 2.6 2.8 2.8 2.7 4.0 4.2 5.6 7.2 7.4 8.8 8.2 8.1 ~15011 2.4 2.8 3.1 3.1 3.0 4.5 4.6 6.2 7.6 7.9 9.4 8.6 8.5 140 2.4 2.8 3.2 3.3 3.1 4.8 4.8 6.6 7.9 8.1 9.8 8.8 8.7 130 2.3 3.0 3.4 3.5 3.3 5.1 4.9 6.7 7.8 8.0 9.7 8.3 8.4 120 2.3 3.1 3.7 3.8 3.5 5.7 5.2 7.3 8.4 8.5 10.4 8.7 8.7 110 2.4 3.3 3.9 4.1 3.7 6.1 5.4 7.8 8.9 8.9 11.0 8.9 8.9 98 11 2.3 3.4 4.2 4.3 4.1 6.7 5.7 7.5 8.3 8.0 9.4 7.5 7.2 84 !:!..!2.4 3.6 4.5 4.8 4.5 8.0 7.0 8.9 9.6 8.8 10.4 8.2 7.7 WATER WEEK NO. -River August September October Mile 44 45 46 47 48 49 50 51 52 ,1 2 3 4 5 18411 7.7 7.9 8.1 8.2 8~4 8.2 7.9 7.4 6.8 .6 5.0 4.6 3.7 2.6 162 8.7 8.6 8.4 8.5 8.6 8.2 7.9 7.3 6.5 5.1 4.5 3.8 2.5 1.5 15011 9.2 8.9 8.7 8.8 8.8 8.4 8.0 7.3 6.5 5.1 4.5 3.7 2.3 1.3 140 9.5 9.1 8.9 8.9 8.9 8.4 8.0 7.3 6.4 5.0 4.4 3.5 1.9 0.9 130 9.3 8.9 8.9 8.9 8.9 8.3 7.9 7.2 6.2 4.8 4.2 3.2 1.5 0.4 120 9.7 9.3 9.1 9.1 9.1 8.4 8.0 7.2 6.1 4.7 4.1 2.9 1.0 0.0 ~110 10.1 9.5 9.3 9.3 9.2 8.4 8.0 7.3 6.1 4.6 4.0 2.7 0.5 0.0 98 11 8.4 8.4 8.7 8.4 8.1 7.2 6.7 6.0 5.0 3.8 3.3 2.0 0.0 0.0 84 !il 9.2 9.7 9.4 8.9 8.5 7.2 6.8 6.1 4.8 3.7 3.1 1.6 0.0 0.0 ~~ II Downstream of Watana Dam site 2..1 Downstream of Devil Canyon Dam site 11 Downstream of Susitna -Chulitna confluence (full m1x1ng assumed) !il At Sunshine stream gaging station at Parks Highway Bridge... -420723 840817 ]~l J J J )J J I J I 1 J MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID~WEEK) 31 32 33 34 35 36 37 38 39 404/42 43 44 45 46 47 464950 51 52 ( ... /... ...I ,- ... NOTES: 1.TEMPERATURES IN ·C . TIME WATANA ONLY,199B ENERGY DEMAND SUMMER 1971 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC ENVIRONMENTAL IrtJl ~fO)'77 ~=RfDl ~~fi">t(J INFORMATION AIIO DATA 1J1JL'-l1nl&L'-l ts;;l!V/';)~ CENTER SUS'TNA JOINT VENTURE J -1 ]I J )J 1 j )1 1 1 ]I II MIDDLE SUSITNA RIVER-ISOTHERMS .WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2 :3 4 5 6 7 e 9 10 II 12 13 14 15 16 11 18 19 20 21 22 23 24 2526 2128 29 30 .. o r J / APPROXIMATE LOCATION OF ICE FRONT ... .. 80 I \~s;,a I I I kiWI!I NOV I DEC I JAN I FEB I m;A1\I "r..I 170 160 90 120 110 140 GOLD CREEK 130 I~NOTES WATANA I I ..IJ ...:\\~~,~\..1.TE.MPERATURES IN ·C. 180 I.j r 2.AP PRO XI MAT E L0 CA TI 0 N .....-OF ICE FRONT FROM ( \0 \\RIVER ICE SIMULA TlON \\~A PLOTS. ...•J I III 'tI ~I .. CHULITNA-IOO ~ W > 0:: DEVIL CANYON 150 U) w ....J ~ TIME WATANA ONLY,1996 ENERGY DEMAND ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT WINTER 1971,1972 CLIMATE DATA ARCTIC ENVIRONMENT4lllXJ&.OO'77&.=~OO4\~~INFORMATION AND OATA (£:,D '=.I~ CENTER SUSITNA JOINT VENTURE • EXHIBIT X .-. STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1974 ENERGY DEMAND:1996 WATER WEEK NO. River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 44 .....1841/1.6 1.6 1.7 2.0 3.2 3.8 4.3 5.7 7.1 7.7 6.4 7.2 8.0 8.8 162 2.3 2.3 2.3 3.0 4.5 4.9 6.0 7.0 8.5 8.8 7.7 8.5 9.0 9.5 1501../2.7 2.6 2.6 3.3 4.6 5.2 6.5 7.4 8.9 9.2 8.2 9.1 9.5 9.9 140 3.0 2.8 2.8 3.5 4.9 5.5 6.9 7.7 9.2 9.5 8.6 9.4 9.7 10.1 130 3.4 3.2 3.2 3.9 5.2 5.7 7.1 7.8 9.2 9.4 8.5 9.3 9.5 10 .0 120 3.8 3.6 3.6 4.5 5.9 6.2 7.9 8.4 9.9 10.0 9.0 9.8 10.0 10.4 110 4.2 4.0 4.0 5.0 6.5 6.7 8.5 8.9 10.5 10.5 9.4 10.2 10.4 10.8 ...98·J'/4.5 4.5 4.9 6.8 7.2 6.6 7.5 7.6 8.3 8.3 8.0 8.3 8.1 8.6 I""'"84 !±/4.9 5.0 5.5 7.6 8.3 7.3 8.4 8.4 9.3 9.1 8.7 9.1 8.9 9.3 ~-WATER WEEK NO. River August September October ,~ Mile 45 46 47 48 49 50 51 52 1 2 3 4 5 6 -1841/9.5 10.0 8.6 8.3 10.0 8.7 7.8 7.7 6.7 5.9 5.2 4.7 4.2 3.2 162 9.9 10.3 8.7 8.6 9.8 8.7 7.6 6.6 5.0 4.7 4.1 3.7 3.3 1.7 1501../10.1 10.4 8.8 8.8 9.8 8.8 7.6 6.3 4.5 4.3 3.8 3.6 3.1 1.4 ~140 10.3 10.6 8.9 9.0 9.8 8.8 7.6 6.1 4.1 4.0 3.5 3.3 2.9 1.0 130 10.2 10.4 8.8 8.9 9.6 8.7 7.4 5.8 3.6 3.7 3.1 3.1 2.6 0.5 120 10.5 10.7 9.0 9.2 9.8 8.8 7.5 5.7 3.2 3.4 2.8 2.8 2.3 0.0,- 110 10.8 11.0 9.1 9.4 9.9 8.9 7.6 5.7 2.9 3.2 2.5 2.6 2.1 0.0 98 ]/8.7 8.9 7.3 8.0 7.9 7.4 6.1 4.6 2.0 2.4 1.8 2.1 1.7 0.0 84 !±/9.4 9.4 7.6 8.6 8.2 7.5 6.3 4.7 1.7 2.2 1.5 2.0 1.5 0.0 -1/Downstream of Watana Dam site 1../Downstream of Devil Canyon Dam site 1/Downstream of Susitna-Chulitna confluence (full m1x1ng assumed) A/At Sunshine stream gaging station at Parks Highway Bridge 420723 840817 ]1 ]j ~j 1 ]J ]J j J I 1 ' MIDDLE SUSITNA RIVER -ISOTHERMS NOTES: 1.TEMPERATURES IN ·C. c; ,I (~ j ~-.. r1""--Q f I \II I I ..r- I... WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 5\52 90 150 110 120 160 170 140 GOLD, CREEK 130 I I I I I , , I I I I I I I I I I " 1 I ,I190III WATANA-- 180 CHULITNA 120 DEVIL CANYON U1 W -.J ~ 0:: W > 0:: 80 I IV'';''!I I \"'i'"i I "Y'-(I ~"'U"l I I 1"-QI I I TIME ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT WATANA ONLY,1996 ENERGY DEMAND SUMMER 1974 CLIMATE DATA ARCTIC ENVIRONMENTAlllXJ&OO~&=~®&/~""'O' INFORMATlOl'l AI'lO DATA "~ CEI'lTER SUSITNA JOINT VENTURE ~,I I I j J I j I i 1 J j J j ] MIDDLE SUSITNA RIVER-ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2 3 4 5 6 7 8 9 10 II 12 13 14 15 16 17 IB 19 20 21 22 23 24 2526 27 28 29 30 ( J f J ( I I r I,f f /' I I ~I ( I I r N ,) \l.I\ I \"'I'_J .. • ... 80 1\-€.-l I.~-."NOV I DEC I JAN I FEB I MAR I ..../t (J 90 190 I I I '!I I I I I I I I ','I ,','I I ,II ' , ]\I , I I,I I I t NOT ES 1.TEMPERATURES IN ·C. 2.ICE SIMULATION NOT MADE FOR THIS CASE. TEMPERATURES FROM NOVEMBER THROUGH APRIL SHOULD NOT BE USED.NOTE SIMILARITY OF THIS CASE TO WINTER OF 1971-1972 FOR 1996 ENERGY DEMAND. 180 170 160 120 140 GOLD CREEl< 130 WATANA CHULlTNA~ DEVIL CANYON 150 cr:w > n: (f) W ....J ~ TIME WATANA ONLY,1996 ENERGY DEMAND ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT WINTER 1974·1975 CLIMATE DATA ARCTIC ENVIRONMENTAL INFORMATION AND DATA CENTER lXl&rm~&=~@&~ SUSITNA JOINT VENTURE EXHISIT'Y 1 1 1 1 ])J J 1 J J l 1 )) MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2 3 4 5 6 7 8 9 10 It 12 13 14 15 16 17 18 19 20 21 22 23 24 2526 27 28 29 30 o o ,.... APPROXIMATE LOCA TtON OF ICE FRONT Q Q •I I 1_,... 90 110 120 140 GOLD. CREEK 130 CHULln~A~ 80 1..-wI:.r I I!.I PSI I I I ..~.I DEC I <JAN I fEB I MAR I APR I DEVIL CANYON 150 180 J60 170 U) W -.J ~ a::w > 0:: TIME WATANA ONLY,1996 ENERGY DEMAND ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT WINTER 1976-1977 CLIMATE DATA ARCTIC ENVIRONMENTAlllXlf!\OO{£f!\=~®f!\C<l!~'5' INFORMATION AND DATA D ~ CENTER SUSITNA JOINT VENTURE EXHIBIT Z ]I J I 1 ]1 -I J I -'>i ])1 }»jJ MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 4950 51 52 .. NOTES: 1.TEMPERATURES IN ·C. 190 WATANA 180 :~:~lift (~l\W m~'~ DEVil CANYON ------,,...I ~I I ... 150 (f) W -J-140~GOLD ~CREE~1)/1 JjU ()r t ~I i U.. 120 110 CHULITNA 100 90 80 TIME WATANA ONLY,1996 ENERGY DEMAND ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT SUMMER 1981 CLIMATE DATA ARCTiC ENVIRONMENTAL I[){]~/Pl'V If.=~@~C<Y1i">tO'INFORMATION AND DATA !NLf.L;)0 ~ CENTER 9USITNA JOINT VENTURE J 1 J )J J J J 1 .j )))J 1 MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 4950 51 52 I Z 3 4 5 6 7 8 9 10 II 12 13 14 15 16 17 18 192021 22 23 24252627282930 ... \... FEBJAN APPROXIMATE LOCATION OF ICE FRONT ..". 1'"r / I DEC N NOV / ... ... .( • -~1- 170 180 160 DEVIL CANYON 150 VJw --l 1\,...I .. ~140 GOLD 0:::CREEK w 130> 0::: 120 11O CHULITNA-IDa 90 80 TIME WATANA ONLY,1996 ENERGY DEMAND WINTER 1981·1982 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROElECTRIC PROJECT ARCTIC ENVIRONMENTALI OO~IRl~~=~IID~~""'&INFORMATION AND DATA D ~ CENTER SUSITNA JOINT VENTURE EXHIBIT AA STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1982 --ENERGY DEMAND:1996 WATER WEEK NO.,- River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 44 1841/3.0 3.1 3.2 3.5 4.0 5.7 6.6 5.8 7.8 11.3 10.0 8.8 8.7 8.7 173 3.1 2.9 3.1 3.2 3.9 5.2 6.1 6.3 8.0 10.7 10.0 9.3 8.9 9.0 162 3.4 3.2 3.5 3.6 4.6 5.8 6.5 7.0 8.8 11.0 10.4 9.8 9.1 9.3 150'£/3.7 3.3 3.6 3.7 4.7 5.7 6.5 7.1 8.9 10.9 10.5 10.1 9.4 9.7 ~3.8 3.4 3.7 3.8 4.8 5.8 6.5 7.3 9.1 10.8 10.6 10.4 9.5 9.8140 130 4.1 3.5 3.9 4.0 5.0 5.8 6.4 7.3 9.0 10.5 10.2 10.2 9.3 9.8-120 4.5 3.8 4.4 4.4 5.6 6.3 6.8 7.8 9.6 10.9 10.7 10.7 9.6 10.2 110 4.8 4.1 4.8 4.8 6.1 6.7 7.1 8.3 10.2 11.3 11.1 11.1 9.8 10.5 99 ]./5.2 4.4 5.2 5.2 6.6 7.1 7.4 8.7 10.8 11.7 11.5 11.6 10.1 10.9-98 !J:./5.0 4.3 5.2 5.3 6.3 6.7 6.3 6.9 8.8 8.6 8.4 8.9 8.1 8.9 84 2/.5.4 4.7 5.9 5.9 7.3 7.7 6.9 7.9 9.9 9.3 9.2 9.7 8.8 9.7 ~ WATER WEEK NO. ~ River August September October Mile 45 46 47 48 49 50 51 52 1 2 3 4 5 ~. 1841/8.9 9.1 9.6 8.5 9.1 9.2 8.1 8.0 7.4 6.5 5.5 4.6 3.8 173 9.2 9.3 9.8 8.6 8.9 8.8 7.8 7.6 6.8 5.9 4.9 3.5 3.1-9.5162 9.5 10.0 8.8 8.9 8.8 7.8 7.5 6.7 5.7 4.5 2.8 2.5 150Z /9.8 9.8 10.2 9.0 9.0 8.8 7.8 7.5 6.5 5.6 4.3 2.3 2.2 -140 10.0 10.0 10.4 9.1 9.0 8.7 7.7 7.4 6.3 5.3 4.0 1.8 1.8 130 10.1 10.0 10.4 9.1 8.9 8.5 7.5 7.2 6.0 5.0 3.6 1.2 1.3 120 10.5 10.3 10.7 9.4 9.0 8.6 7.6 7.1 5.9 4.8 3.2 0.6 0.8 ~110 10.8 10.5 11.0 9.6 9.1 8.6 7.6 7.1 5.8 4.6 3.0 0.1 0.3 99 ]j 11.3 10.8 11.3 9.8 9.2 8.7 7.7 7.1 5.7 4.3 2.6 0.0 0.0 98 !J:./8.9 8.6 9.1 7.7 7.6 6.9 5.8 5.8 4.5 3.5 2.0 0.0 0.0 F-84 2/9.7 9.3 9.7 8.3 7.8 7.0 6.0 5.5 4.1 2.9 1.3 0.0 0.0 1/Downstream of Watana Dam Site Z/Downstream of Devil Canyon Dam Site '1/Upstream of Susitna -Chulitna confluence !±/Downstream of Susitna -Chulitna confluence (full m~x~ng assumed),-i/At Sunshine stream gaging station at Parks Highway Bridge 420723 840817 1 1 1 J I )J 1 )-I I 1 ]~)l ) MIDDLE SUSITNA RIVER -ISOTHERMS NOTES: 1.TEMPERATURES IN ·C. '" • \J .. '" r---...(·JJ L;~ WATERWEEKS (PLOTTED AT MID-WEEK) 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 190 WATANA 180 170 160 DEVIL CANYON 150 U) w -.J 140~GOLD 0:::CREEK w 130> a: 120 ~ I 110 CHULITNA 100 90 ~~ 80 TIME WATANA ONLY,1996 ENERGY DEMAND SUMMER 1982 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROElECTRIC PROJECT ARCTIC ENVIRONMENTAll fU1&.~'77 t;.=~fiilt;.~"""'5' INFORMATION AND DATA l/1J [SiAl LSl£IiAl~ CENTER SUS'TNA JOINT VENTURE 1 1 ))1 1 i I )J )i )J ))»J MIDDLE SUSITNA RIVER-ISOTHERMS .. WATER WEEKS (PLOTTEQ AT MID-WEEK) 49 50 51 52 1 2 3 4 5 6 7 B 9 10 II 12 13 14 15 16 17 18 19 20 21 22 23 24 2526 2728 29 30 NOTES 1.TEMPERATURES IN ·C. 2.APPROXIMA TE LOCA TlON OF ICE FRONT FROM RIVER ICE SIMULA TlON PLOTS. ( i T I ~; I II 'j'II ,., !\ 'APR '" MAR- \... I FEB /.... JAN ,-1 /~V1/1\- LAPPROXIMATE LOCATlO~.\{IIIOFICE'FRONT I N \\ DECNOV 190 (/j WATANA:j/-J 180 170-11 , 1601~I 1: 1 DEVIL CAN YON 150 1J) w ....J 140:E GOLD, CREEK0::: 130w > 0::: 120 110 100CHULITNA' 90 eo TIME WATANA ONLY,1996 ENERGY DEMAND ALASKA POWER AUTHORITY SUSITNA HYDROelECTRIC PROJECT WINTER 1982-1983 CLIMATE DATA ARCTIC ENVIRONIo/ENTAl INFORMATION AND DATA CENTER 1}(]~1Rl{£~=~IID~~ SUS'TNA JOINT VENTURE EXHIBIT AB STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1971 ,~ENERGY DEMAND:2001 WATER WEEK NO. ,,,,,", River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 44 1841./2.5 2.5 2.5 2.5 2.4 2.4 2.9 3.6 5.3 6.2 7.1 7 .4 7.5 7.8 173 2.4 2.5 2.6 2.6 2.5 3.3 3.9 4.9 6.4 6.9 8.0 7.8 7.9 8.3 162 2.3 2.6 2.8 2.9 2.7 4.0 4.2 5.6 7.3 7 .4 8.9 8.1 8.1 8.8 1502:/2.4 2.8 3.1 3.1 3.0 4.5 4.6 6.2 7.6 7.9 9.5 8.5 8.5 9.2 140 2.4 2.9 3.2 3.3 3.1 4.8 4.8 6.6 7.9 8.1 9.9 8.8 8.7 9.5 130 2.4 3.0 3.4 3.5 3.3 5.1 4.9 6.7 7.8 8.1 9.7 8.3 8.4 9.3 r-120 2.4 3.2 3.7 3.8 3.5 5.7 5.2 7.3 8.4 8.5 10.5 8.7 8.7 9.7 !110 2.4 3.3 4.0 4.1 3.7 6.2 5.4 7.8 9.0 8.9 11.1 8.9 8.9 10.1 99 1/2.4 3.5 4.2 4.4 3.9 6.7 5.7 8.3 9.5 9.3 11.7 9.3 9.2 10.6-98 !:±./2.3 3.4 4.2 4.3 4.1 6.7 5.7 7.5 8.3 8.0 9.4 7.5 7.2 8.4 84 i/2.4 3.6 4.5 4.8 4.5 8.0 7.0 8.9 9.6 8.8 10.4 8.2 7.7 9.2 WA TER WEEK NO. ~River August September October Mile 45 46 47 48 49 50 51 52 1 2 3 4 5 ~1841/8.0 8.1 8.1 8.5 8.2 7.9 7.4 6.9 5.5 5.0 4.6 3.6 2.5 173 8.4 8.3 8.3 8.6 8.2 7.8 7.3 6.6 5.3 4.7 4.1 3.0 1.9 162 8.6 8.4 8.4 8.7 8.2 7.9 7.2 6.5 5.1 4.5 3.8 2.4 1.4,-. 1501/9.0 8.7 8.7 8.9 8.4 8.0 7.3 6.5 5.1 4.5 3.6 2.2 1.2 140 9.2 8.9 8.8 9.0 8.4 8.0 7.3 6.4 5.0 4.4 3.4 1.8 0.8-130 9.0 8.9 8.9 9.0 8.3 7.9 7.2 6.2 4.8 4.2 3.2 1.4 0.3 120 9.3 9.1 9.1 9.1 8.4 7.9 7.2 6.1 4.7 4.1 2.9 0.9 0.0 110 9.5 9.3 9.2 9.3 8.4 8.0 7.3 6.1 4.6 4.0 2.7 0.5 0.0-99 1/9.8 9.5 9.4 9.4 8.5 8.1 7.3 6.0 4.5 3.8 2.4 0.0 0.0 98 !:±./8.5 8.7 8.4 8.2 7.2 6.7 6.0 5.0 3.8 3.2 2.0 0.0 0.0 84 1/9.7 9.4 8.8 8.5 7.2 6.8 6.1 4.8 3.7 3.1 1.6 0.0 0.0 .1i1PfiRl 1/Downstream of Wa tana Dam si te 1/Downstream of Devil Canyon Dam site"......1./Upstream of Susitna -Chulitna confluence !:i/Downstream of Susitna -Chulitna confluence (full m~x~ng assumed) :if At Sunshine stream gaging station at Parks Highway Bridge 420723 840817 ---------------_._----_..•._.-._------_._----~---------------------------------- J ))j --1 1 )I -~))J 1 J "])J }J MIDDLE SUSITNA RIVER-ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 '32 33 34353637 :38 39 4041 424344454647 484950 51 52 ... NOTES: 1.TEMPERATURES IN °c ..( //1 ((I 190 WATANA 180 170 160 DE VIL CANYON 150 Ul W -l ~140 GOLD 0::CREEK w 130 > a: 120 110 CHULITNA .!2Q. 90 11 80 TIME WATANA ONLY,2001 ENERGY DEMAND SUMMER 1971 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC ENVIRONMENTAL IM ~1cl'7J ~=r;;'1Ol ~t<»~ INfORa.fATlOH AND DATA lI1JAlf\I&/Al ISlQJlAl~ CENTER SUSITNA JOINT VENTURE 1 1 1 1 J J 1 J J 1 ]J J j }I J MIDDLE SUSITNA RIVER -ISOTHERMS APR I;lo MARFEBJANDEC ;A.PPAOXIMATE LOCATION OF ICE FRONl I I ... 170 WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2 3 4 5 6 1 8 9 10 II 12 13 14 15 16 17 /8 19 20 21 22 23 24 25 26 27 28 29 30 190 -l I I I II I ,.I 1 '1 ..1_",I.1 'I'I 1 ,1 I , I 1I , I ','I I 1NOT E S WATANA:j j (~r 1/·~(:..\ /\1 '----/-I \....\1.TE.MPERATURES IN ·C. ..r--...1 -2.APPROXIMATE LOCATION OF ICE FRONT FROM RIVER ICE SIMULATION PLOTS. 160 DEVIL CANYON U> 150 w .....J ::: I I I • GOLD 140 a:::CREEK--t i w ... >130 n::: 120 1 IH1 ... 110 • CHULlTNA'OO , 90 80 TIME WATANA ONLY,2001 ENERGY DEMAND ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT WINTER 1971-1972 CLIMATE DATA ARCTIC £NV.IRONM£NTALI [}{]~OO~~=~®~Ci»,%,INFORMATION AND DATA D ~ C£NTER 9U91TNA JOINT VENTURE EXHIBIT AC I B J 1 J I J )J )i )-1 J MIDDLE SUSITNA RIVER -ISOTHERMS CHULITNA 100 NOTES: 1.TEMPERATURES IN ac. WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 3435 36 37 3B 39 4041 42 43 44 45 46 47 48 4950 51 52 80 I f MAt I I I \JUR-----L--J-.-v~L /I AUJ,i!I g 0Cff..LJ 90 180 170 JzJ...J----J L I I I I I I I I190II WATANA 160 DE VIL CANYON 150 (f) w -.J ~140 GOLD a:CREEK w 130 > 0:: 120 110 TIME WATANA ONLY,2001 ENERGY DEMAND SUMMER 1974 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC ENVIRONMENTAL IfUl &:'[D)'7}~=~[D)~(Q)"'Vr5' INfORMATION ANO DATA IJ1J lnl&lr.l LSlQJlr.l~ CENTER SUSITHA JOINT VENTURE 1 -]i J ]J J I J 1 1 )J 1 ).~1 MIDDLE SUSITNA RIVER-ISOTHERMS I / ) J... I I I I I !I I I i i -\ \ I \ \ \ \ I '" "'-\ \ I ... ... ... .. /70 90 \ 1 I 80 I \--rj ....1J{OCT II NOV I DEC I JAN I FEB I MAR d A~R I I 180 160 /10 120 140 GOLD CREEK 130 WATER WEEKS (PLOTTED AT MID~WEEK) 49 50 51 52 I 2 3 4 5 6 7 e 9 10 II 12 13 14 15 16 17 18 19 2021 22 23 24 2526 2728 29 30 190 -I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I 'I I I I WATANA--j J /II ~I ~I r ~...'I I \ I A I NOTES 1.TEMPERATURES IN ·C. 2.ICE SIMULA TION NOT MADE FOR THIS CASE. TEMPERATURES FROM NOVEMBER THROUGH APRIL SHOULD NOT BE USED.NOTE SIMILARITY OF THIS CASE TO WINTER OF 1971-1972 FOR 1996 ENERGY DEMAND . CHULlTNA~ (f) W ...J :i: a::w> a: DEVIL CANYON ~ 150 TIME WATANA ONLY,2001 ENERGY DEMAND ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT WINTER 1974-1975 CLIMATE DATA ARC TIC ENV I RONMENTAlllXl/AOO?£/A <::>RIOIIfo ~""'6" INFORMATION AND OATA LSI.2l[,;l~ CENTER SUSITNA JOINT VENTURE .... r-• STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1974,.,...ENERGY DEMAND:2001 WATER WEEK NO. River M~lY June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 44 1841/1.4 1.4 1.6 2.0 3.3 3.8 4.4 5.7 7.0 7.7 6.5 7.4 8.0 8.7 173 1.8 1.7 1.8 2.3 3.6 4.2 5.1 6.2 7.6 8.2 7.3 8.1 8.5 9.0 162 2.2 2.2 2.3 3.0 4.5 4.9 6.0 6.9 8.4 8.8 7.8 8.7 9.0 9.4 1501/2.6 2.5 2.6 3.2 4.7 5.3 6.6 7.4 8.8 9.2 8.3 9.2 9.5 9.8 140 2.8 2.7 2.8 3.5 4.9 5.5 6.9 7.7 9.1 9.5 8.6 9.5 9.7 10.0 130 3.3 3.1 3.1 3.9 5.2 5.7 7.2 7.8 9.2 9.4 8.5 9.3 9.5 9.9 120 3.7 3.5 3.6 4.5 5.9 6.2 7.9 8.4 9.9 10.0 9.0 9.8 10.0 10.3 110 4.1 3.9 4.0 5.0 6.5 6.7 8.5 8.9 10.5 10.5 9.4 10.3 10.4 10.7 99 1./4.5 4.3 4.4 5.6 7.1 7.2 9.1 9.5 11.1 11.0 9.8 10.7 10.8 11.1 98 !±./4.5 4.5 4.9 6.8 7.2 6.6 7.5 7.6 8.3 8.3 8.0 8.3 8.1 8.6 84 1/4.9 5.0 5.5 7.6 8.3 7.3 8.4 8.4 9.3 9.1 8.7 9.1 8.9 9.3 ,..., WATER WEEK NO. River August September October Mile 45 46 47 48 49 50 51 52 1 2 3 4 5 6..- 1841/9.3 10.0 8.8 8.6 9.9 9.1 8.2 7.8 6.8 6.0 5.3 4.7 4.3 3.2 173 9.5 10.1 8.9 8.7 9.7 9.0 7.9 7.0 5.9 5.2 4.6 4.2 3.8 2.5-162 9.7 10.3 8.9 8.9 9.8 9.0 7.9 6.7 5.1 4.7 4.1 3.7 3.3 1.8 1501/10.0 10.5 9.0 9.1 9.8 9.1 7.9 6.4 4.6 4.4 3.8 3.6 3.1 1.4 140 10.2 10.6 9.1 9.2 9.7 9.1 7.8 6.2 4.2 4.1 3.5 3.4 2.9 1.0 F 130 10.1 10.4 9.0 9.1 9.6 9.0 7.7 5.8 3.7 3.7 3.1 3.1 2.6 0.5 120 10.4 10.7 9.1 9.3 9.7 9.1 7.7 5.8 3.2 3.4 2.8 2.8 2.3 0.0 110 10.7 11.0 9.2 9.6 9.9 9.2 7.8 5.8 2.9 3.2 2.5 2.6 2.1 0.0-99 1./11.0 11.2 9.4 9.8 10.0 9.3 7.8 5.8 2.5 2.9 2.2 2.4 1.8 0.0 98 !±./8.7 8.9 7.3 8.1 7.9 7.5 6.2 4.6 2.0 2.4 1.8 2.1 1.7 0.0 84 1/9.3 9.4 7.6 8.6 8.2 7.6 6.3 4.7 1.7 2.2 1.5 2.0 1.5 0.0 -1/Downstream of Watana Dam site 1,./Downstream of Devil Canyon Dam site 1./Upstream of Susitna -Chulitna confluence....!±./Downstream of Susitna-Chulitna confluence (full mixing assumed) 1/At Sunshine stream gaging station at Parks Highway Bridge 420723 840817 EXHIBIT AD )-1 J 1 J 1 1 J 1 J J -..J )]j j ]1 1 MIDDLE SUSITNA RIVER -ISOTHERMS NOTES: 1.TEMPERATURES IN °C. WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 3435 36 37 38 39 4041 42 43 44 45 46 47 484950 5\52 190 WATANA 180 170~l.. I • • • I . ..t)(It ){(O,,,\(I! 160 DE V IL I ,;.I ~I I .;.I II/V I I \I I I \ \ , I I .. CANYON---I 150 (f)w .J 140~GOLD a::CREEK II I , I I , I I I /I I I I I I I ,I I I r ,.. W 130> a:: 120 110 CHULITNA 100 90 80 TIME ALASKA POWER AUTHORITY SUSITNA HYDROelECTRIC PROJECT WATANA ONLY,2001 ENERGY DEMAND SUMMER 1981 CLIMATE DATA ARCTIC ENVIRON"'EHTAlIOO&/m97 &=g@t!:I~IHFORMATIO/l AND DATA {!:,IS 0 ~ CENTER SUSITHA JOINT VENTURI;; -)I -)I )1 I j j 1 J 1 )1 I 1 MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2 3 4 5 6 7 8 9 10 II 12 /3 14 15 16 17 /8 19 20 21 22 23 24 2526 27 28 29 30 NOTES /~.I 11.TEMPERATURES IN ·C. N ~h .I....12.ICE SIMULATION NOT MADE FOR THIS CASE.• TEMPERATURES FOR NOVEMBER THROUGH MARCH SHOULD NOT BE USED ... ,I ('\/\u!'1 III I I U 17 I\ /\(II(\I I )\X !(V 1 iNJIIJ IU\ Jit I I -I ~ .!. I I FEB I I"'''\1 I OEC JAN ( I .. /... .. ~u -~ • I I I I I , I I , ,II I I I I I I " I 1 iII I I I I I I I I I I I I I ,190 ! 170 180 160 90 120 110 140 GOLD, CREEK 130 WATANA CHULITNA IOO (f) W --l == a::w > 0::: TIME WATANA ONLY,2001 ENERGY DEMAND ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT WINTER 1981·1982 CLIMATE DATA ARCTIC ENVIRON"£NTAlllXI~OO[£~=~IID~~ INFORMATION AND DATA .<>~ CENTER SUS'TNA JOINT VENTURE .. EXHIBIT AE - STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1982 ENERGY DEMAND:2001 WATER WEEK NO. River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 44 1841./3.2 3.2 3.4 3.6 4.0 5.7 6.5 5.7 6.0 10.9 10.0 8.6 8.6 8.7 173 3.3 3.1 3.2 3.3 3.9 5.2 6.0 6.3 7.0 10.4 9.9 9.1 8.8 8.9 162 3.6 3.3 3.6 3.7 4.6 5.8 6.4 6.9 7.9 10.8 10.3 9.6 9.0 9.3 1502./3.8 3.4 3.7 3.7 4.7 5.7 6.4 7.1 8.2 10.7 10.5 10 .0 9.3 9.6 140 4.0 3.5 3.8 3.8 4.8 5.8 6.4 7.2 8.5 10.7 10.6 10.2 9.4 9.7 130 4.3 3.6 4.0 4.0 5.0 5.8 6.3 7.3 8.5 10.3 10.2 10.1 9.2 9.7 120 4.6 3.9 4.4 4.5 5.6 6.3 6.7 7.8 9.2 10.8 10.6 10.6 9.5 10.1 110 4.9 4.2 4.8 4.8 6.1 6.7 7.0 8.2 9.8 11.2 11.0 11.1 9.8 10.4 99 ]./5.3 4.4 5.3 5.3 6.6 7.1 7.4 8.7 10.4 11.6 11.4 11.5 10.1 10.8 98 !±/5.1 4.3 5.2 5.3 6.3 6.7 6.3 6.9 8.8 8.5 8.4 8.9 8.2 8.9 84 !if 5.5 4.7 5.9 6.0 7.3 7.7 6.9 7.9 9.8 9.2 9.2 9.7 8.9 9.7 WATER WEEK NO •..... River August September October Mile 45 46 47 48 49 50 51 52 1 2 3 4 5 1841./8.7 9.0 9.7 8.4 9.0 9.1 8.5 8.1 7.6 6.7 5.7 4.6 3.9 173 9.0 9.2 9.9 8.5 8.9 8.8 8.0 7.7 7.0 6.1 5.0 3.5 3.2 162 9.3 9.4 10.1 8.7 8.9 8.8 8.0 7.6 6.9 5.8 4.6 2.8 2.6 1501/9.7 9.7 10.3 8.9 9.0 8.7 7.9 7.6 6.7 5.7 4.3 2.3 2.3 140 9.9 9.9 10.5 9.0 9.0 8.7 7.8 7.4 6.5 5.4 4.0 1.8 1.9 130 10.0 9.9 10.5 9.0 8.9 8.5 7.6 7.2 6.2 5.1 3.6 1.2 1.4 120 10.4 10.2 10.8 9.3 9.0 8.5 7.6 7.2 6.1 4.8 3.2 0.5 0.8 110 10.7 10.5 11.1 9.5 9.1 8.6 7.7 7.1 6.0 4.7 2.9 0.0 0.4 99 1/11.1 10.8 11.4 9.8 9.2 8.7 7.7 7.1 5.8 4.4 2.6 0.0 0.0 98 !i/8.9 8.6 9.1 7.7 7.6 6.9 5.7 5.8 4.2 3.6 2.2 0.4 0.3 84 !if 9.6 9.3 9.7 8.3 7.8 7.0 5.9 5.5 3.6 3.1 1.6 0.0 0.0 1./Downstream of Watana Dam Site 2../Downstream of Devil Canyon Dam Site ]./Upstream of Susitna -Chulitna confluence.....!i/Downstream of Susitna -Chulitna confluence (full m1x1ng assumed) }/At Sunshine stream gaging station at Parks Highway Bridge 420723 r-840817 ! J j .'1 J 1 1 1 1 ...J ]1 L J ]'1 1 MIDDLE SUSITNA RIVER -ISOTHERMS NOTES: 1.TEMPERATURES IN ac. .. .. \ '" 2 ) c; .. ...,... WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 100 CHULITNA -II ,I I •Q .. :j1 Lf ~dJU~fI L 190 WATANA 180 170 160 DE VIL CANYON 150 (/) w -..J :::c?:140 GOLD 0::CREEK W 130 > cr: 120 110 TIME WATANA ONLY,2001 ENERGY DEMAND SUMMER 1982 CLiMATI:DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC E.NVIRONMENTAll (}{]/J!"ffi)'>71(.""RlIDta~INFORMATION AltD DATA (!;,/i'V.LS 0 IR,~ CENTER SUSlTNA JOINT VENTURe 1 i ----1 --]]]----1 ----].-I 1 j MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2 3 4 5 6 7 8 9 fO II 12 13 14 15 16 11 18 19 20 21 22 23 24 2526 21 28 29 30 NOTES " 1.TEMPERATURES IN °C. '2.APPROXIMATE LOCATION OF ICE FRONT FROM RIVER ICE SIMULATION PLOTS·. .. \~l .~ \ .. FEB I '" JAN TIME WATANA ONLY,2001 ENERGY DEMAND WINTER 1982·1983 CLIMATE DATA· ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC ENVIRONMENTAL IOO&OOtllA=~!~Vi\~INfORMATION AND DAtA 01N~ CENTER SUSITNA JOINT V~HTURE SIMULATED RIVER TEMPERATURES Watana and Devil Canyon Operating ... EXHIBIT AF STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1971 ENERGY DEMAND:2002 WATER WEEK NO. River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 -1501/2.2 2.2 2.2 2.3 2.5 3.2 3.9 4.3 6.3 6.5 7.4 8.0 8.0 140 2.2 2.3 2.5 2.6 2.7 3.7 4.2 4.9 6.8 6.9 8.0 8.2 8.2 ~130 2.2 2.5 2.d 2.9 3.0 4.2 4.4 5.4 7.0 7.1 8.3 8.0 8.1 120 2.2 2.7 3.1 3.3 3.2 4.9 4.8 6.1 7.7 7.6 9.1 8.3 8.3 110 2.2 2.9 3.4 3.6 3.4 5.4 5.1 6.6 8.3 8.1 9.8 8.6 8.6 99 1../2.2 3.1 3.7 4.0 3.7 6.0 5.4 7.3 9.0 8.6 10.6 8.9 8.9 98 l/2.2 3.1 3.8 4.1 4:0 6.4 5.7 7.2 8.2 7.9 9.2 7.5 7.1 84 !:i/2.3 3.4 4.3 4.7 4.5 7.8 7.0 8.8 9.5 8.7 10.3 8.1 7.6 ,~WATER WEEK NO. River August September October Mile 44 45 46 47 48 49 50 51 52 1 2 3 4 5 1501/8.1 6.4 6.3 8.3 8.4 8.4 8.2 7.7 7.3 6.4 5.4 4.7 3.1 2.0 ""'"140 8.5 6.9 6.6 8.5 8.6 8.5 8.2 7.7 7.2 6.2 5.2 4.4 2.6 1.5 130 8.5 7.0 6.8 8.5 8.6 8.4 8.1 7.6 7.0 5.9 4.9 4.0 2.0 0.9 120 9.0 7.5 7.2 8.7 8.8 8.4 8.2 7.6 6.9 5.7 4.7 3.6 1.4 0.3 .-110 9.4 7.9 7.5 8.9 8.9 8.5 8.2 7.6 6.8 5.6 4.5 3.3 0.9 0.0 99 2:./9.9 8.4 7.9 9.1 9.1 8.5 8.3 7.7 6.7 5.4 4.2 3.0 0.3 0.0 98 1/8.2 7.9 7.7 8.2 8.0 7.2 6.8 6.2 5.4 4.2 3.3 2.2 0.2 0.0 ~84 !i/9.1 9.4 8.8 8.7 8.3 7.2 6.9 6.2 5.2 3.9 3.1 1.8 0.0 0.0 1./Downstream of Devil Canyon Dam si te 1../Upstream of Susitna -Chulitna confluence l/Downstream of Susitna -Chulitna confluence (full ml.xl.ng assumed) i/At Sunshine stream gaging station at Parks Highway Bridge 420723 840817 I -1 1 1 j J I j S I J J J J --J 1 j J MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 3435 36 37 38 39 4041 42 43 44 45 4647 48 49 5051 52 I I I J I J I I I I I I I190,I WATANA 180 170 160 DEVIL CANYON NOTES: 1.TEMPERATURES IN ·C. (J) W ...J ~ IT: LJJ> IT: 150 140 GOLD CREEK 130 ,.." 1 ~ 1 I I".....-J....c.........w ..""III ". 9:ILv J Lit JUl\I AU rpT! TIME WATANA/OEVIL CANYON,2002 ENERGY DEMAND SUMMER 1971 CLIMATE DATA If} ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT "ACTIC ENVIRONMENTAlIOO&IRl?£rr.=§fIDrr.~~INFORM"nON AND DATA A 0 A~ CENTER SUSITNA JOINT VENTURE -1 )1 ---1 I 1 1 J ])]-1 I MIDDLE SUSITNA RIVER -ISOTHERMS 22 23 24 25262728 29 30 NOTES 1.TEMPERATURES IN ·C. 2.APPROXIMATE LOCATION OF ICE FRONT FROM RIVER ICE SIMULATION PLOTS. 170 160 WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2 3 4 5 6 7 8 9 10 II 12·13 14 15 16 17 18 19 20 21 190 I I I I I'I I I I I I I.I,I I I I ,I ,I I I.I I I ~I I I I I I I I I WATANA APR \j MARFEBJANDEC o ~\- / ~APPAOXIMATE LOCATION I I OF ICE FRONT NOVoc TIME ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT WATANAIDEVll CANYON,2002 ENERGY DEMAND WINTER 1971·1972 CLIMATE DATA ARCTIC ENVIRONMENTAL IM!;.IOl7J!;.=RfD)!;.~~ INFORMATION AND OAU lIlJl..;llru(£,{,;l LSl!2l{,;l~ CENTER SU3JTNA JOINT VENTURE e EXHIBIT AG - ...... STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1974 ENERGY DEMAND:2002 1/Downstream of Devil Canyon Dam site £/Upstream of Susitna -Chulitna confluence 2/Downstream of Susitna-Chulitna confluence (full m~x~ng assumed) ~/At Sunshine stream gaging station at Parks Highway Bridge 420723 840817 )i 1 1 1 j J 1 ]i I )}»J 1 MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 3435 36 37 38 39 40 41 42 43 44 45 46 47 48 4950 51 52 NOTES: 1.TEMPERATURES IN ·C. 190 WATANA 180 170 160 DEVil CANYON en ~~~~K;V /f /1If\0 /UW --.J :E ll:w 130>I J /_1 I /II \\J t~a:: 120 110 CHULITNA JQO 90 80 TIME ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT WATANAIDEVIL CANYON.2002 ENERGY DEMAND SUMMER 1974 CLIMATE DATA ARCTIC EHVIRONMENTALIIXI&.OOll ~=/i;'I!ilMM"''c5'INfORMATION AND DATA .tAl lS(g)tAl~ CENTER SUS'TNA JOINT VENTURE ]1 1 1 1 1 J J 1 1 .J j }J 1 ] MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 r 2 3 4 5 6 7 8 9 10 II 12 13 14 15 16 17 la 192021 22 23 24 25262726 2930 170 NOTES 1.TEMPERATURES IN ·C. 2.ICE SIMULA nON NOT MADE FOR THIS CASE. TEMPERATURES FOR NOVEMBER THROUGH MARCH SHOULD NOT BE USED. \ \ ~ \ \ \ \ \ r~ 90 \ \ I i I \1 I "I I 7 f 80 t\-E?PJ /III fJ-·III NOV I DEC I JAN I FEB I MAR ~ApR)I 190 I I I I I I I I I I I I I I I I I I I I I I I I I (,I I I I I I I I IifIII 120 110 140 GOLD CREEK 130 CHULITNA!22...-..-- WATANA 180 160 DEVIL CANYON 150 (f) W ..J ~ 0:: W > 0:: TIME WATANAIDEVIL CANYON,2002 ENERGY DEMAND WINTER 1974-1975 CLIMATE DATA ALASKA POWER AUTHORITY SUS/TNA HYDROELECTRIC PROJECT ARCTIC ENVIRONMENTAL I/}{]~!FJ~&=~(ID tr.~0rry INFORMATlOI't AND DATA 0 ~~ CENTER SUSITNA JOINT VENTURE EXHIBIT AH 1 1 1 ~))j J ~J )1 J ]!)J 1 ] MIDDLE SUSITNA RIVER-ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2.3 4 5 6 1 8 9 10 II 12 13 14 15 16 17 18 19 20 21 22 23 24 2526 27 28 29 30 WATANA:J I I II'I I I II I I III I I I r I I I )1 I I III I I I II I I r.o;:~p ERA TUR E SIN .C. leo 2.APPAOXIMA TE LOCATION OF ICE FAONT FAOM 110 -i I . I I I I I I I AIVEA ICE SIMUL A T ION PLOTS. 160 DEVIL CANYON ---I o 90 .,.... / I J '-APPROXIMA TE lOCA TlON I OF ICE FRONT 80 I w'f,..U I J Iv ...I ,-ill nvv I I DEC.I JAN I rEa I MAR I APR I 150 120 110 140 GOLD, CREEK 130 CHULlTNA~--- a::w > a:: (J) W ...J :::= ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT TIME WATANA/DEVIL CANYON,2002 ENERGY DEMAND WINTER 1976-1977 CLIMATE DATA ARCTIC ENVIRONMENTAL INFORMATION AND DATA CENTER [){]~OO{£~=~®~~ SUSITNA JOINT VENTURE EXHIBIT AI' STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1981 ENERGY DEMAND:2002 WATER WEEK NO. River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 44 .-1501/2.5 3.2 3.9 4.5 4.9 6.1 7.3 7.9 7.3 7.0 6.1 4.5 5.5 7.1 140 2.7 3.5 4.3 4.9 5.5 6.3 7.8 8.5 7.7 7.4 6.6 4.8 5.8 7.4 130 3.0 4.0 4.7 5.1 6.0 6.5 8.0 8.7 7.8 7.6 6.7 5.1 6.0 7.6 120 3.3 4.6 5.4 6.0 6.8 7.0 8.7 9.5 8.4 8.1 7.2 5.4 6.4 7.9 110 3.6 5.1 5.9 6.5 7.4 7.4 9.3 10.1 8.9 8.5 7.5 5.7 6.6 8.1 99 2J 4.0 5.6 6.4 7.1 8.1 7.7 9.9 10.8 9.3 9.0 8.0 6.1 7.0 8.4 98 :i/4.1 5.6 6.2 6.6 7.4 6.6 8.0 8.5 7.8 7.9 7.6 6.8 7.4 8.1 84 !±/4.5 6.3 7.1 7.3 8.3 7.2 8.8 9.4 8.5 8.6 8.3 7.8 8.3 8.9 WATER WEEK NO. River August September October Mile 45 46 47 48 49 50 51 52 1 2 3 4 5 1501/7.4 7.5 7.3 7.6 8.0 8.2 8.3 8.2 7.6 7.2 6.8 6.3 5.6 140 7.6 7.6 7.4 7.8 8.1 8.3 8.4 8.0 7.3 7.0 6.5 5.9 5.1 .-130 7.8 7.6 7.5 7.9 8.2 8.2 8.2 7.6 6.8 6.5 6.1 5.4 4.4 120 8.0 7.7 7.7 8.1 8.3 8.3 8.3 7.3 6.5 6.3 5.8 5.1 3.7 110 8.2 7.8 7.9 8.3 8.3 8.3 8.3 7.1 6.2 6.1 5.6 4.9 3.2 99 l:..I 8.5 8.0 8.1 8.6 8.6 8.4 8.3 6.9 5.8 5.8 5.2 4.5 2.5 98 1/8.1 7.4 7.6 7.9 7.7 7.3 6.8 5.0 4.4 4.4 4.1 3.5 1.7 84 !±/8.8 7.6 8.0 8.6 8.1 7.4 6.8 4.5 3.9 4.0 3.7 3.0 0.9 .... I~ l./Downstream of Devil Canyon Dam Site Z/Upstream of Susitna -Chulitna confluence :i/Downstream of Susitna -Chulitna confluence (full m~x~ng assumed) !±/At Sunshine stream gaging station at Parks Highway Bridge 420723 840817 v -1 J J I I 1 1 J 1 1 J I MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 3435 36 37 38 39 4041 42 43 44 45 46 47 484950 51 52 190 I 1 I I I,I I I I I I I I I JI I I 'I I I I j WATANA 180 NOTES: 1.TEMPERATURES IN ·C. 170 160 / 110 120 140 GOLD CREEK 130 CHULITNA 100 :~~,',.:,,:,:v,,'",:.v:,-'~L (I\Jr, DEVIL CANYON 150 (f) W ..J ~ a:w> a:: TIME ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT WATANAIDEVIL CANYON,2002 ENERGY DEMAND SUMMER 1981 CLIMATE DATA ARCTIC ENVIIIONMENTALIIXI&OO'?7 !J:J.=RfOJ&~1'i'¥(Jo INfORMATION AND DATA {f"LSl'2l ~ CENTER SUSITNA JOINT VENTURE J J j ~.]J J J J -J i J I I -.I MIDDLE SUSlTNA RIVER-ISOTHERMS WATER WEEKS (PLOTTED AT MID·WEEK) 49 50 51 52 I 2 3 4 5 6 7 8 9 10 1/12 13 14 15 16 17 18 19 202/22 23 24 25262728 29 30 170 180 WATANA I I I , I I I ,i !I ,',',I , I I I I 'I I I I ~, ,I I I'I I ~NOTES190II 1.TEMPERATURES IN ·C. 2.APPROXIMATE LOCATION OF ICE FRONT FROM RIVER ICE SIMULATION PLOTS. 160 • APPROXIMATE LOCATION., OF ICE FRONT90 80 1\S§P[I n OCT '-Ill NPV .I DEC I JAN I FEB I MM~n I AFflI 1I 110 120 140 GOLD. CREEK 130 CHULlTNA IOO DEVIL CANYON 150 (f) W ...J ::it a:::w > a::: TIME WATANAJDEVIL CANYON.2002 ENERGY DEMAND WINTER 1981-1982 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC ENvIRONMENTAL I00&00'77 &1 =(glID&~~INFORMATION AND DATA l!;.D ~ CENTER SUSITNA JOINT VENTURE EXHIBIT AJ STREAM TEMPERATURES WEATHER PERIOD:SU~~R 1982 ENERGY DEMAND:2002 .. WATER WEEK NO. River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 44 .-150.!/3.7 3.8 4.1 4.3 4.5 4.7 5.3 6.2 6.9 7.9 10.2 6.0 5.1 5.5 140 3.9 4.0 4.3 4.6 4.9 5.0 5.5 6.6 7.5 8.3 10.5 6.4 5.3 5.8 130 4.2 4.2 4.6 4.8 5.2 5.3 5.7 6.8 7.8 8.5 10.2 6.9 5.6 6.2 120 4.6 4.4 5.0 5.2 5.8 5.8 6.1 7.4 8.6 9.1 10.6 7.4 6.0 6.6 110 4.9 4.6 5.4 5.6 6.3 6.2 6.5 7.9 9.2 9.7 11.1 7.9 6.3 7.0 99 2:./5.3 4.9 5.8 6.0 6.7 6.7 6.9 8.5 9.9 10.2 11.5 8.5 6.7 7.4 98 1/5.1 4.6 5.5 5.6 6.4 6.6 6.2 6.8 8.5 8.1 8.4 8.1 7.0 7.6 84 !±./5.5 4.9 6.1 6.2 7.3 7.7 6.8 7.8 9.7 8.9 9.1 9.1 8.0 8.8 WATER WEEK NO •..... River August September October Mile 45 46 47 48 49 50 51 52 1 2 3 4 5,,,,,", 1501/6.7 7.9 8.5 8.5 8.6 8.6 8.4 8.4 8.3 8.0 7.3 6.3 5.3 140 7 .1 8.1 8.8 8.6 8.7 8.6 8.5 8.3 8 .1 7.5 6.7 5.4 4.6-130 7 .4 8.3 9.0 8.7 8.6 8.5 8.3 8.0 7.6 6.9 5.9 4.3 3.8 120 7.9 8.7 9.3 9.0 8.7 8.6 8.3 7.9 7.4 6.5 5.3 3.3 3.0 110 8.2 9.0 9.6 9.2 8.8 8.7 8.4 7.9 7.2 6.1 4.8 2.5 2.3.-99 1:/8.7 9.3 10.0 9.4 8.9 8.7 8.4 7.7 6.9 5.6 4.1 1.5 1.5 98 1/8.1 8.2 8.6 7.6 7.5 7.1 6.3 6.0 4.5 4.1 3.0 1.5 1.4 84 !i/9.0 8.9 9.3 8.2 7.8 7.2 6.3 5.6 3.8 3.4 2.2 0.8 0.8 1/Downstream of Devil Canyon Dam Site.....2:./Upstream of Susitna -Chulitna confluence 1/Downstream of Susitna -Chulitna confluence (full m1x1ng assumed) !i/At Sunshine stream gaging station at Parks Highway Bridge ..... 420723 840817 1 1 J -J 'I j }J )j ]]]]J j MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 34353637 38 39 4041 424344 45 4647 484950 51 52 190 ,I I I '.I I I I.I I I I I'I I I '.I I ,• WATANA 180 170 160 DEVIL CANYON NOTES: 1.T EM PE RA TU RES IN·C. (f) W ...J ~ a::w> 0:: 150 140 GOLD CREEK 130 120 CHULITNA 100 90 80 I II'"''" I I •uv"!(I "'Vlh I I I AU..,\l I ~r.tr ,I I TIME WATANAIDEVIL CANYON,2002 ENERGY DEMAND SUMMER 1982 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC ENVIRONMENTAlllXI&ffij~&=~lID&~t?'VQ\INFORMATION AND DATA P ~ CENTER SUSITNA JOINT VENTURE J ]---1 J J-1 I J 1 1 J )]1 J MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2 3 4 5 6 7 8 9 10 II 12 13 14 15 16 17 18 19 20 21 22 23 24 2526 27 2829 30 - WATANA 190 I I I I I I I I I I I I I I I I I I I , I I I I I "I J I I I , ,jIIII1I 180 170 NOTES 1.TEMPERATURES IN ·C. 2.APPROXIMATE LOCATION OF ICE FRONT FROM RIVER ICE SIMULATION PLOTS. .., ~,I I \ r..-APPROXIMATE LOCATION \ OF I'CE FRONT 90 ,'3 ..."II tJ"IJ I I'"'vv 1 DEC I JAN I FEB I MAR/I APr!1j 90 160 DEVIL CANYON (/)15]///1/IJ/\\w ....J ::::E 140 .-r-...../'\... GOLD 0:.:CREEK w 130> cr.:: 120 I I I f I .'I Il.I I • I I ~1\I."h-I I \I I .. 11O TIME WATANAIDEVIL CANYON,2002 ENERGY DEMAND ALASKA POWER AUTHORITY SUSITNA HYORO~LECTRIC PROJECT I WINTER 1982-1983 CLIMATE DATA ARCTIC ENVIRONMENTAL INFORMATION AND DATA CENTER EXHIBIT AK STREAM TEMPERATURES WEATHER PERIOD:SU~~R 1971 ENERGY DEMAND:2020 WATER WEEK NO. River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 1501./2.0 ·2.2 2.3 2.1 2.4 3.0 3.7 4.5 6.5 6.6 7.5 8.1 8.1 140 2.0 2.3 2.5 2.4 2.6 3.6 4.1 5.1 7.1 7.1 8.2 8.4 8.3 130 2.1 2.5 2.8 2.8 2.9 4.2 4.4 5.6 7.2 7.2 8.5 8.0 8.1 120 2.1 2.7 3.1 3.1 3.1 4.9 4.7 6.3 8.0 7.8 9.4 8.4 8.4 110 2.1 2.9 3.4 3.5 3.4 5.5 5.1 6.9 8.6 8.4 10.1 8.7 8.6 99 11 2.1 3.1 3.7 3.9 3.6 6.2 5.4 7.6 9.3 8.9 10.9 9.1 9.0 98 11 2.2 3.1 3.9 4.1 4.0 6.5 5.7 7.3 8.2 7.9 9.2 7.5 7.0 84 !±I 2.3 3.4 4.3 4.6 4.5 7.9 7.0 8.8 9.6 8.8 10.3 8.1 7.6 .- WATER WEEK NO. ~ River August September October Mile 44 45 46 47 48 49 50 51 52 1 2 3 4 5 1501.1 7.0 6.4 8.3 6.9 8.5 8.4 8.2 7.8 7.3 6.4 5.4 4.7 3.1 2.1 140 7.4 6.8 8.6 7.1 8.6 8.4 8.2 7.7 7.2 6.3 5.3 4.5 2.8 1.8 130 7.6 7.0 8.5 7.2 8.6 8.3 8.1 7.6 7.0 6.0 5.1 4.2 2.4 1.4 120 8.1 7.4.8.9 7.5 8.8 8.4 8.2 7.6 6.9 5.9 4.9 4.0 1.9 0.9 110 8.6 7.8 9.2 7.7 9.0 8.4 8.2 7.7 6.8 5.8 4.8 3.7 1.6 0.5 992:/9.1 8.3 9.6 8.0 9.1 8.5 8.3 7.7 6.7 5.6 4.6 3.5 1.1 0.0 9811 8.1 7.9 8.3 7.5 8.0 7.2 6.8 6.2 5.4 4.5 3.7 2.7 0.8 0.0 84!!.1 9.0 9.4 9.2 8.2 8.4 7.2 6.9 6.2 5.2 4.2 3.4 2.2 0.2 0.0 1.1 Downstream of Devil Canyon Dam site 11 Upstream of Susitna -Chulitna confluence l./Downstream of Susitna -Chulitna confluence (full m1x1ng assumed) !±I At Sunshine stream gaging station at Parks Highway Bridge ~ -420723 840817 J 1 1 I I 'fi j]II ]J .-J I 1 ']1 'II, MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 34 35 36 37 38 39 4041 42 4344 45 4647 484950 51 52 NOTES: 1.TEMPERA TURES IN ·C. H_A... ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT TIME WATANAIDEVIL CANYON,2020 ENERGY DEMAND SUMMER 1971 CLIMATE DATA ARCTIC ENVIRONMENTAL INfORMATION AND DATA CENTER [){!&rmii::L!:\=~[ID&~ SUSlTNA JOINT VENTURE J J I ]I I 1 j I j )) MIDDLE SUSITNA RIVER-ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2 3 4 5 6 7 8 9 10 1/12 13 14 15 16 190 I I I I.J ,I I I I I I '.I I I I " I I I WATANA 160 170 22 23 24 2526 27 28 29 30 NOTES L TEMPERATURES IN °C. 2.APPROXIMATE LOCATION OF ICE FRONT FROM RIVER ICE SIMULATION PLOTS. 160 1tV .\~ ~ .\ ~ ". ., ~~.--/ ... 1/1/1 80 I \.,,,,rIf III Yulll I NOV J DEC I JAN I FEB I MAR lAP.,.!I 150 90 120 110 140 GOLD _ CREEK 130 CHULlTNA~ DEVIL CANYON U1 W ...J :E 0:: W > 0:: TIME WATANAIDEVIL CANYON,2020 ENERGY DEMAND WINTER 1971·1972 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC fNVIROHMfHTAlllXlL!\!m'77 ~=RrnJ~~~INFORMATION AND DATA {£,IS 0 ~ CENTER SUSITNA JOINT VENTURE ... EXHIBIT AL - ".... STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1974 ENERGY DEMAND:2020 WATER WEEK NO. River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 44 ISO 11 1.8 1.8 1.9 2.2 3.3 3.8 4.7 5.8 7.2 8.0 7.4 8.3 8.9 9.7 140 2.2 2.2 2.3 2.8 3.9 4.4 5 .4 6.4 7.8 8.6 7.9 8.8 9.3 10.0 130 2.7 2.7 2.8 3.6 4.6 4.9 6.1 6.8 8.2 8.7 7.9 8.7 9.2 9.9 ~120 3.2 3.1 3.3 4.4 5.5 5.6 6.9 7.6 9.1 9.4 8.5 9.4 9.7 10.3 110 3.6 3.6 3.8 5.0 6.2 6.1 7.6 8.2 9.8 10.0 9.0 9.9 10.2 10.7 99 11 4.1 4.0 4.3 5.7 6.9 6.7 8.4 8.8 10.5 10.6 9.6 10.5 10.7 11.2 98 11 4.1 4.3 4.9 6.9 7.2 6.5 7.3 7.4 8.1 8.1 7.9 8.2 8.0 8.5 84 !:il 4.7 4.9 5.5 7.7 8.3 7.3 8.2 8.2 9.1 9.0 8.6 9.0 8.8 9.3 WATER WEEK NO. River August September October Mile 45 46 47 48 49 SO 51 52 1 2 3 4 5 6 1501 9.9 10.2 10.2 9.5 10.0 9.6 9.2 8.4 6.8 5.9 4.7 3.7 3.0 2.0 140 10.1 10.4 10.2 9.7 10.0 9.6 9.1 8.1 6.2 5.5 4.4 3.5 2.7 1.6 130 10.1 10.3 10.0 9.5 9.9 9.5 8.9 7.5 5.4 5.0 4.0 3.2 2.4 1.0 120 10.4 10.6 10.1 9.8 10.0 9.6 8.9 7.4 4.8 4.6 3.5 3.0 2.1 0.4 110 10.7 10.8 10.2 10.0 10.2 9.7 8.9 7.3 4.3 4.2 3.2 2.7 1.9 0.0 99 1-..1 11.0 11.1 10.2 10.2 10.3 9.7 8.8 7.1 3.7 3.8 2.8 2.5 1.7 0.0 98 :il 8.7 8.8 7.6 8.2 8.0 7.7 6.6 5.0 2.5 2.8 2.1 2.2 1.6 0.0 84 1f·1 9.3 9.3 7.9 8.7 8.3 7.8 6.6 5.0 2.1 2.5 1.8 2.0 1.4 0.0 .... - 11 Downstream of Devil Canyon Dam site 4/Upstream of Susitna -Chulitna Confluence 11 Downstream of Susitna -Chulitna confluence AI At Sunshine stream gaging station at Parks Highway Bridge 420723 840817 )1 --~1 .-J J 1 I ))J J ,]1 J MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 3435 3637 38 39 4041 42 43 44 45 46 47 484950 51 52 \ ;; TIME WATANAIDEVIL CANYON,2020 ENERGY DEMAND SUMMER 1974 CLIMATE DATA NOTES: 1.TEMPERATURES IN ·C. ALASKA POWER AUTHORI1Y SUSITNA HYDROelECTRIC PROJECt il ARCTIC ENVIRONMENTAll (}{I&OO{£&=~!ID&~."aINFORMATIONANDDATA, CENTER SUSITNA JOINT VENt;RE I 1 1 i i ---~l 1 J --1 J )1 ]1 MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2 3 4 5 6 7 8 9 10 II 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 180 160 170 WATANA~I I 'i I I , ,I I I ,',', ,'r I I I 1 I , ,'I',,'r ',INOTES 1.TEMPERATURES IN ·C. 2.WINTER ICE SIMULATION NOT MADE FOR THIS CASE ..TEMPERATURES FROM NOVEMBER THROUGH APRIL SHOULD NOT BE USED. 'J ,~ \ \ '\ \/ J J I \ j l 1 I \\ \... 1 ... I \ \I \ i J I \l\I i I---•...,..,I.• •__•MAR ....-...... BO 1\-a.rlill --.II NOV I 1)1:'1'"I .1 ...1\1 I I"I:'A I \ I It<I I 120 /10 140 GOLD CREEK 130 DEVIL. CANYON 150 90 CHULlTNA~ a::w>- a:: U) W ...J ~ TIME WATANAIDEVIL CANYON,.2020 ENERGY DEMAND WINTER 1974·1975 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC EHVIRONMENT4L1 OOIAOO"il fi.c:oRJD)fi.~~ INFORMAtiON AND DATA ~t.=.l lSL!!Jt.=.l~ CENTER SUSIT"A JOINT VENTURE • EXHIBIT AM ~~']1 J J !J 1 1 J ]'1 -~J 1 1 J l 1 1 MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I Z 3 4 5 6 7 8 9 /0 II 12 13 14 15 16 17 18 19 2021 22 23 24 25262728 29 30 190 J I I I I I I I t I I , I I I I I I .', I I 'I I I I '.I I I I I I I I I DEVIL CANYON-'-------I 150 NOTES 1.TEMPERATURES IN °C. 2.ICE SIMULATION NOT MADE FOR THIS CASE. TEMPERATURES FROM NOVEMBER THROUGH APRIL SHOULD NOT BE USED. 160 170 160 80 I §_.If I 1/1 vv])I I ,w.I DEC I JAN I FEB I MAR II APR III 90 120 110 140 GOLD CREEl< 130 WATANA CHULlTNA!29......r- (J) W .....J ::2: a::: w > a::: ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT TIME WATANAIDEVIL CANYON,2020 ENERGY DEMAND WINTER 1976·1977 CLIMATE DATA ARCTIC ENVIRONMENTAL INFORMATION AND DATA CENUR lXlt!.\!m~~=~IID~MQ) SUSITNA JOINT VENTURE EXHIBIT AN ~ STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1981 I"""ENERGY DEMAND:2020 i ~WATER WEEK NO. ~River May June July Mile 31 32 33 34 35 36 37 38 39 40 41 42 43 44 1501/2.6 3.2 4.0 4.5 5.1 6.1 7.3 8.8 7.7 7.2 6.4 8.6 10.7 11.2 140 2.8 3.6 4.4 5.0 5.7 6.4 7.8 9.3 8.1 7.6 6.9 9.0 10.9 11.3 130 3.1 4.1 4.9 5.5 6.2 6.5 8.1 9.4 8.1 7.8 6.9 8.5 10.4 10.8 120 3.4 4.8 5.6 6.1 7.1 7.0 8.8 10.1 8.7 8.3 7.4 9.0 10.8 11.1 110 3.7 5.3 6.2 6.7 7.8 7.4 9.4 10.7 9.2 8.8 7.8 9.5 11.1 11.4 99 l,./4.0 5.8 6.7 7.3 8.5 7.8 10 .0 11.3 9.7 9.3 8.3 9.9 11.4 11.6 98 J/4.1 5.6 6.3 6.6 7.4 6.6 8.0 8.6 7.8 7.9 7.7 8.0 8.8 8.6 84!±/4.5 6.4 7.2 7.3 8.4 7.2 8.8 9.5 8.5 8.6 8.3 8.8 9.3 9.5 ~ WATER WEEK NO. River August September October-Mile 45 46 47 48 "49 50 51 52 1 2 3 4 5 150~/6.1 5.1 6.9 8.0 8.4 8.4 8.6 8.4 7.6 7.2 6.8 6.3 5.5 140 6.4 5.3 7.1 8.2 8.5 8.5 8.6 8.2 7.4 7.0 6.6 6.0 5.1-130 6.6 5.5 7.2 8.3 8.5 8.4 8.5 7.8 7.0 6.8 6.3 5.7 4.6 120 7.0 5.6 7.4 8.5 8.7 8.4 8.5 7.6 6.7 6.6 6.1 5.5 4.1 110 7.3 5.8 7.5 8.7 8.9 8.5 8.5 7.3 6.5 6.4 5.9 5.3 3.7.- 99 l,./7.6 6.0 7.7 9.0 9.0 8.5 8.5 7.1 6.2 6.2 5.7 5.0 3.2 98 1/7.7 6.4 7.4 8.1 7.7 7.4 6.9 5.1 4.8 5.0 4.6 4.0 2.5 84 !i/8.5 6.9 7.9 8.8 8.0 7.5 6.9 4.6 4.3 4.6 4.2 3.5 1.7 1/Downstream of Devil Canyon Dam Site l,./Upstream of Susitna -Chulitna confluence ~/Downstream of Susitna -Chulitna confluence (full m~xlng assumed) ~I At Sunshine stream gaging station at Parks Highway Bridge .....420723 840817 )-J 1 ))J ]J I J I 1 J J ~~~---~c 1 1 --J ]• MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 I I I 190- WATANA NOTES: 1.TEMPERATURES IN ·C. 180 170 160 \... \Jill)Wll~lll140 90 110 120 801l11~I/o\I_II\IJVI'i \IJUL ,_I ,tUG ILSEPl1ll GOLD CREEK 130 CHULITNA 100 DEVil CANYON enw ...J :E n::w> 0:: TIME WATANAIDEVIL CANYON,2020 ENERGY DEMAND SUMMER 1981 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC E..VIRO ....ENTAll M ~fO)"iJ ~=~/Dl ~(q>~ IHFOR ..AT.OIt AHO OATA lI1J[..;lInl~.:.;l LSl!V[..;l~ CE"TER SU8'TNA JOINT VENTURE -])--~-l 1 I ]1 1 1 J I 1 I MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 49 50 51 52 I 2 :3 4 5 6 7 8 9 10 II 12 13 14 15 16 17 18 19 20 21 22 23 24 2526 27 28 29 30 NOTES 1.TEMPERATURES IN ·C. 2.ICE SIMULA TlON NOT MADE FOR THIS CASE. TEMPERATURES FOR NOVEMBER THROUGH MARCH SHOULD NOT BE USED. NOTE SIMILARITY TO .WATANA/DEVIL CANYON, 2002 WINTER 1981-1982. ... \ 1 \ \\ ~\ 1 ( \\ \ i \\ ~\I ( J I ) I I \~ \\('\ .--J \ I \ I \ IJ ~ \I / I } I ,/ \ I \l 90 120 110 140 GOLD CREEK 130 CHULlTNA 100 I I I I I I , I I I I I I I , I I " I I I " I • I ~I I I • I I I I I190'I WATANA 80 I w£}J[I , I v ...I I I /I [..vv I DEC I JAN III FEB I lYIt\n]II \A8~I II 180 170 160 DEVIL CANYON r50 (f) W ....J ::::E cr:w > n::: TIME WATANAIDEVIL CANYON,2020 ENERGY DEMAND WINTER 1981·1982 CLIMATE:DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC ENVI.RONMENTALI [){J~rnl(l~=~(ii)4\~~ INFORMATION AND DATA LSIIDLAl~ CENTER SUSITNA JOINT VENTURE ... EXHIBIT AO .- 420723 840817 .. STREAM TEMPERATURES WEATHER PERIOD:SUMMER 1982 ENERGY DEMAND:2020 J -J .).-.---1--)-.-,1 1 J J 1 .-1 J J 1 ]1 MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKS (PLOTTED AT MID-WEEK) 31 32 33 3435 36 37 38 39 4041 42 43 44 45 46 47 48 4950 51 52 NOTES: 1.TEMPERATURES IN ·C ...1 Jjll1l ~1 190 WATANA 180 170 160 DEVIL CANYON 15°l (I)I w ... -J ~140 GOLD a:CREEK w 130 > 0:: 120 110 CHULITNA 100 90 80 I }(MJ /I A JUN TIME ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT WATANA/DEVIL CANYON,2020 ENERGY DEMAND SUMMER 1982 CLIMATE DATA ARCTIC ENVIRONMENTAL I[){)&~'77 ~=[g[IDIJ:,.~~ INfORMATION AND DATA &tr.l 0 ~ CENTER SUSITNA JOINT VENTURE I i -1 i J J 1 1 MIDDLE SUSITNA RIVER -ISOTHERMS WATER WEEKSCPLOTTED AT MID-WEEK) 49 50 51 52 I 2 3 4 5 6 1 8 9 10 11 12 13 14 15 16 11 18 1920 21 22 23 24 25262128 29 30 /70 180 WATANA~, ,'I',,,I ' , ,'I'I I I I',, ,1' , ,1'I , I I'I ,I ~.O;:~PER AT U RES IN .C. 2.APPROXIMA TE lOCA TlON OF ICE FRONT FROM RIVER ICE SIMUlA TION PLOTS. 160 .. .... 1....\ 80 I I...../?.I 1/q.../I II NOV I DEC I UN"I......1M.."!I APR!I I 110 120 140 GOLD CREEK 130 DEVIL CANYON 150 90 CHULITNA 100 1--- (f) W ..J ~ 0:: W>. 0:: TIME WATANAIDEVIL CANYON,2020 ENERGY DEMAND WINTER 1982-1983 CLIMATE DATA ALASKA POWER AUTHORITY SUSITNA HYDROELECTRIC PROJECT ARCTIC ENVIRONMENTAL I[}{]£OO&:~=~ral4\~~ INFORMATION ANO OATA lIDlAl~ CENTER SUSITHA JOINT VENTURE