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Home My WebLink AboutAPA2601FEDERAL ENERGY REGULATORY COMMISSION PROJECT No.7114 SUSITNA HYDROELECTRIC PROJECT I Final Report February 1985 Document No.2601 VOLUME 2 -APPENDICES A THROUGH D I •.:•.·•.·.•...•.~~\LASKA POWER AUTHORITY_----...I M~~~~~~L!\®©@ ~r~;'A JOINT VENTURE CASE E-VI ALTERNATIVE Fl.OW R·EGIME TK 1425 .58 F472 no.2601 """ - - .... ..... - -- Document No.2601 Susitna File No.6.18.7.5 t L\'l..C, .# .:?B SUSITNA HYDROELECTRIC PROJECT CASE E-VI ALTERNATIVE FLOW REGIME VOLUME 2 APPENDICES A THROUGH D Report By Harza-Ebasco Susitna Joint Venture ARLIS Alaska Resources Library &Information SerViceS }U}chorage,PJaska Prepared for Alaska Power Authority Fina 1 Report February 1985 .... ..... - Appendix A SUSITNA HYDROELECTRIC PROJECT Summary of Resource Agency Meeting Minutes November,December 1984 Note:Detailed copies of the minutes of these minutes are being sent to participant Agencies for review.An addendum to this Appendix will be issued if Agency representatives request changes • ,.... -- Between 20 November,1984 and 20 December,1984 the Alaska Power Authority held a series of meetings with representatives from the state and federal resource agE~ncies as well as project intervenors from the private sector. The purpose of these meetings was to present the rationale utilized in refining thE!flow regime,to compare and contrast the refined E-VI regime with both Case C and other regimes developed more recently,and to present, for agency and intervenor comment,the Power Authority's assessment of Gase E-VI as its selected Project flow regime. Minutes of these four meetings have been prepared and are being sent out for review and c:orrection by those in attendance.In the absence of these final detailed minutes the following summary information is provided. Meetings of November 20 and 27,1984 A meeting was held on 20 November,1984 for the purpose of discussing the process by which the Power Authority had arrived at Case E-VI as its preferred case.A second meeting was held on 27 November,1984 to discuss the same topic with agency representatives unable to attend the earlier meeting.Attendees for the two meetings are listed below. For the 20 November Meeting: .... .... 69275 850220 H.Hosking,USFWS B,.Smith,NMFS D.Pruitt,USGS D•Rosenberg,ADF&G L.Latta,ADNR G.Gorbics,USAGE J.Thrall,Harza-Ebasco L.Gilbertson,Harza-Ebasco w.Dyok,Harza-Ebasco L.Polivka,Harza-Ebasco H.Teas,Harza-Ebasco E.Marchegiani,Power Authority 1 M.Granata,ADNR G.Prokosch,ADNR D.Wilkerson,ADEC J.Lowenfels,BHBP&A E.Myers R.Fleming,Power Authority T.Arminski,Power Authority For the 27 November Meeting: C.,Yanagawa,ADF&G D.McKay,ADF&G D.Rosenberg,ADF&G H.,Hosking,USFWS B..Bowker,USFWS K"Middleton W.Dyok,Harza-Ebasco L.Gilbertson,Harza-Ebasco J.Thrall,Harza-Ebasco E.Marchegiani,Power Authority R.Fleming,Power Authority - .... - Materials presented and discussions were similar at both meetings. Therefore,the following are combined notes for the two meetings. Dr.Fleming briefly explained the distinction between environmental flow requirementn and project operation.Environmental requirements es tabl ish maximum and minimum flow limits for each week of the year within which project operation flows are constrained.Project operation flows are also guided by p<)wer and energy criteria and the volume of water available to the project. Dr.Gilbertson presented information regarding development of alternative environmental flow requirements.Chum salmon spawning in side sloughs and chinook salmon rearing in side channels are considered the most critical and sensitive (re.project related changes)habitat utilization combinations for development of flow requirements.The other evaluation species and their habitats are less sensitive to flow changes and their needs would be protected by requirements based on chum spawning or chinook rearing. Further,th,e other evaluation species and their habitat utilizations will be included for detailed impact assessment and flow refinement during the general process of flow negotiations. 69275 850220 2 ..... ..... Eight sets of environmental requirements (flow cases)were developed based on habitat needs for chum spawning in side sloughs and ch inook rearing in side channels.These flow cases are in addition to those presented in the License Application,and represent a refinement based on more complete information and better understanding of the Susitna River and its aquatic resources. Dr.Gilbertson presented each of the eight flow cases and discussed their important characteristics.The eight cases were grouped into three categories illS follows: 1.Cases to mitigate with flow for potential loss of chinook rearing in side channels. 2.Clllses to mitigate with flow for potential loss of chum spawning in side sloughs. 3.C:;lses to mitigate with flow for both 1 and 2,above. primary characteristics of category 1 (above)are minimum flow requirements during the summer to maintain a desired quantity of rearing habitat,flow stability to improve habitat quality and maximum -winter requirements for protection nnd stability of over-wintering sites in side sloughs. primary characteristics of category 2 are increased minimum flows during August and September to improve access conditions at slough mouths,spiking flows in August and/or September to improve slough access conditions, spiking flm,s in June to clear sediment and debris out of spawning sites, and maximum winter flows to protect spawning sites in sloughs. The primary characteristics of category 3 are combinations of those for categories 1 and 2.Details presented for each flow case can be found in the Power Authority document,Evaluation of Alternative Flow Requirements (APA,November,1984). 69275 850220 3 ..... ..... There was a general discussion of the flow cases by the meeting partici- pants.The more important subjects are outlined below. Mr.Dyok the~n presented tne economic bas is for the selec t ion of Case E-VI. He explaine~d that given the energy demand pattern and the annual hydroelectric energy potential from the Susitna project,a potential savings can be realized if energy can be stored and transferred from summer to winter.Thi.s occurs because additional winter energy generation allows for a reduction in required thermal generation capacity and for the displacement of thermal generation units that have higher fuel and operating costs per MWh of gene!ration.Therefore,the operational strategy is to increase winter energy generation from the project until the same amount of thermal energy is produced each week of the year.However,if winter energy production is limited by the available Watana reservoir storage volume,more thermal enel~gy will be produced in winter (October-April)than in summer (May-September).Since Susitna and other hydro projects would provide the difference between the system energy demand and the thermally supplied energy,more~energy would be supplied by the Susitna project in winter than in summer. Mr.Dyok discussed how the reservoir operations program attempts to satisfy the operational strategy while maintaining the Susitna River discharge at Gold Creek discharge within established environmental flow constraints.The reservoir olPerations program produces a time series of weekly flows and energies for a 34 year duration.The flows are analyzed for their environmenta.l suitability and the average monthly and firm energies are input in the General Electric Opt imized Generat ion Planning (OGP)mode 1- The OGP modE~l determines annual costs and the present worth of these annual costs for tbe life of the project. Mr.Dyok prE!sented graphs for a number of cases illustrating the discharges at which thli!flow for each week of the year would be exceeded 9-,50-,and 94-percent of the time.He noted that the governing flow constraints on power production were generally the minimum summer flows and the maximum 69275 850220 4 .... ..- - - winter flOWI;.Project winter flows will normally be less than the maximum flow constraint.Maximum power output and,consequently,maximum winter flows will only occur when Watana is operating alone and there is an emergency situation such as a sudden power outage from the loss of other generation units in the system. Mr.Dyok ne:ltt presented energy data for average and low flow conditions for Watana oper,ation and Watana/Devi1 Canyon operation.He then described the generation capacity requirements and the present worth of the long term costs of the alternatives. Following some discuss ion of Mr.Dyok I s presentation,Dr.Gilbertson then discussed mitigation costs associated with representative flow cases for the Middle River reach.Flow cases designed to mitigate for chum spawning and flow regimes based only on power production would require a hatchery to replace chinook rearing habitat and various levels of slough modification for chum Sl?awning.Flow cases designed to mitigate for chinook rearing would require slough modificat~on for chum spawning.Flow cases designed to mitigate for both chinook rearing and chum spawning would requ1re either no further mitigation or some slough modification depending on the flow requirement:;of each particular case. Total project costs,including mitigation,were compared and Case E-VI was found to be the least-cost alternative.Case E-VI was selected by the Power Authority as the preferred alternative based on its total cost,including mitigation,and compatibility with mitigation policies. A final discussion was held concerning the refinement process followed by the Power Authority in arriving at Case E-VI.It was agreed that additional documentati,on and/or explanation would be highly valuable to explain how the eva1 uation species (chum and chinook salmon)and critical habitats (chum spawning in sloughs and chinook rearing in side channels)were selected. The Power Authority promised to provide this documentat ion in a follow-up meeting to be scheduled as soon as feasible. ....69275 850220 5 ,.,.., ! f - Meeting of December 18,'1984 The meeting was held with representatives from various State and Federal agencies to discuss the Power Authority's selection of chum and chinook salmon as critical evaluation species for the project as requested during the November 20 and 27,1984 presentations. Those in attendance were: Richard Fleming,APA Jim Thrall,Harza-Ebasco Hank Hosking,Fish and Wildlife Service Tom Arminski,APA Chris Godfrey,EPA Brad Smith,NMFS Dan Rosenburg,ADF&G Gary Prokosch,AnNR Leroy Latta,ADNR Jeff Lowenfels,BHB Larry Gilbertson,Harza-Ebasco Phil Scordelis,Harza-Ebasco Ben Rosenthal,NOAA. Tom Arminski opened the meeting with a brief discussion of the process to reach negotiated settlement of a project flow regime.Mr.Arminski described the original process schedule and components (Figure la).Under this schedule the Instream Flow Relationships Report (IFRR)would provide the necessBlry framework and technical information to assess the aquatic habitat consequences of various project operation scenarios.This informat ion would be used in the economic and environmental compar1sons process to develop an lI op timized"flow regime that provides a balance between economic and environmental objectives.The Power Authority would 69275 850220 6 - - .- - Figure la SUSITNA HYDROELECTRIC PROJECT ORIGINAL FLOW REGIME SETTLEMENT PROCESS IFRR COMPARISONS ~ RFR FLOW NEGOTIATIONS SETTLEMENT MARCH APRIL AUGUST .... ...... - use this process to select a preferred flow regime and present it in a Recommended Flow Regime (RFR)report as their initial position to begin flow negot ia t ions,• Mr.Arminsk:i then described a revised process and schedule that,the Power Authority intends to follow for flow negotiations (Figure Ib).The original and revised processes were contrasted by Mr.Arminski and Dr.Gilbertson.A major difference is the level of anticipated agency involvement prior to and during the ,economic and environmental comparisons process.A major reason for revising the flow negotiation process was to increase agency consultation.The Power Authority encourages agency participation in all steps leading toward a negotiated flow regime.Information.data and analyses will be incorporated-into the process as they become available. Dr.Gilbertson explained the rationale leading to the selection of chinook salmon rearing in side channels and chum salmon spawning in side sloughs as the most critical (most sensitive to mainstem flow)species/habitat combinations for initial evaluation of flow regimes.Alteration of mainstem flow will not effect all habitats equally.The degree of effect will depend on the level of influence mainstem flow has on characteristics of the habitats.Seven aquatic habitat types were evaluated for the effects of mainstem flow on five physical characteristics of the habitats (Table 1)• Mainstem influence is minor for three habitat types.The remaining four. mainstem.sdde channel,tributary mouth and side slough were evaluated further. Dr.Gilbertson continued his explanation by describing how the habitat types are utilized by the evaluation species.The evaluation species are listed in the left column of Table 2.The habitat uses noted in Table 2 are the dominant us,es by each species.For example.chinook salmon juveniles may be found rearing in upland sloughs and at tributary mouths but this habitat use is minor and transient compared to the rearing habitats in side channels and side sloughs marked (x)in Table 2. 69275 850220 8 1 J -1 1 -.J 1 )1 j ]1 1 1 Figure Ib SUSITNA HYDROELECTRIC PROJECT REVISED FLOW REGIME SETTLEMENT PROCESS FLOW REGIME SETTLEMENT ,;AGENCY CONSULTATION I JCOMPARISONS 1 ....SETTLEMENT --i.•PROCESS HABIT AT RESPONSE TO FLOW ANALYSIS TECH. MEMO TECH. MEMO JAN.FEB.MARCH APRIL MAY JUNE JULY - o -no influence 1 -small,limited influence 2 -moderate,occasional influence 3 -moderate,frequent influence 4 direct,extensive,exclusive influence 69274/TBL 850124 .. ,1 69274/TBL 850124 - - - - - Habitat requirements for migration and movement are not as restrictive as for'rearing or spawning/incubation.Depth and velocity requirements for migration and movement are provided over a wide range of mainstem flows and would be restrictive only at extreme low and high flows.Habitat require- ments for rearing and spawning/incubation are more restrictive,and flows intended to provide for these uses would provide adequate conditions for migration and movement.Therefore,habitat utilization for rearing and spawning/incubation were focused on for further evaluation. The four most sensitive habitat types were then compared as to their use by the evaluation species for rearing and spawning/incubation (Table 3).Use of the senslitive habitats for spawning/incubation is limited to chum and sockeye salmon,and burbot.Burbot populations in the Middle River are of low density and of lesser importance than chum and sockeye salmon.Sockeye salmon spawning in the Middle River is essentially limited to a few side sloughs that are also utilized by chum salmon for spawning.Approximately 1,500-2,000 sockeye spawn in the middle river side sloughs each year.Chum salmon utilize side slough sites more extensively.Approximately 3,000- 5,000 spawn in the middle river side sloughs each year.Therefore,sockeye spawning sites,timing and habitat needs are so similar to the more abundant chum salmon that efforts to mitigate impacts for chum spawning/incubation would effectively mitigate impacts on sockeye.Thus,the most important use of the sensitive habitat types for spawning/incubation is by chum salmon. The sensiti.ve habitat types are used for rearing more commonly than for spawning/incubation (Table 3).However,the extent or importance of this utilization varies.Rearing in the sensitive habitat types by the resident species is mostly for overwintering.Use during the open water season is limited to tributary mouths and other clear water habitats,and appears to be associated with the presence of spawning salmon (salmon eggs are a food source for the resident species).The exception to this is burbot,which remain in the mainstem throughout the year.However,all the resident fish populations in the Middle River are characterized as small,low dens ity 69275 850220 12 Table 3 SUSITNA HYDROELECTRIC PROJECT PRIMARY UTILIZATION OF SENSITIVE HABITAT TYPES BY EVALUATION SPECIES Habitat Types "'" Evaluation Species Chinook Salmon Chum Salmon Coho Salmon Sockeye Salmofl Pink Salmon Arctic Grayling Rainbow Trout Do 11y Varden Burbot Mainstem r r r r sJr Side Channel r s Side Slough r sJr s.r Tributary Mouth r r ""'" s -spawning/incubation r -rearing 69274/T.8L 850124 ... populations that,with the exception of burbot,rely on tributary and lake habitats within the Susitna Basin for their major production. Chum and sockeye salmon utilize side sloughs for initial,short-term rearing after emerging from spawning sites in the late spring.Sockeye gradually leave their natal side sloughs and move into upland sloughs for further rearing and overwintering.Most of this movement has occurred by early July.Chum salmon rear in their natal side sloughs prior to starting a general downstream movement to Cook Inlet.The chum begin moving out of the sloughs in lMay and are essentially out by July.The chum juveniles also utilize slack water (low velocity,moderate depth)areas during their down- stream movement to Cook Inlet.This habitat use is limited to approximately June to mid-~uly ,after which time they are essentially out of the Susitna system and into Cook Inlet. Chinook salmon juveniles use side channels and side sloughs throughout the year for rearing and overwintering.Side sloughs are used most extensively during the winter,whereas side channels are used mostly during the open water months.The chinook juveniles are found in higher densit ies in side channels than side sloughs during July through mid-October.Habitat conditions in the side channels are directly influenced by mainstem flows, whereas side slough habitat is determined mostly by local and regional groundwater infiltration.Based on these considerations,chinook rearing in side channels was selected as the most critical use of the sensitive habitats for rearing. Chum salmon spawning in side sloughs and chinook salmon rearing in side channels were selected as the primary evaluation species/habitat combina- tions for initial designs and assessment of environmental flow requirements. The other evaluation species will be included in the overall process of flow regime refinement,impact assessment and mitigation planning. Dr.Gilbertson then handed out a flow chart on the proposed process for flow regime refinement and selection (Figure 2).It describes how a simulation 69275 850220 14 ,..... - .... ,~ - Figure 2 SUSITNA HYDROELECTRIC PROJECT FLOW REGIME COMPARISON PROCESS .eNVfl()N.EHTAL FLOW CASE ~ SIMULATED --ECONOMC -----1 PRGJECT OPERATION CONSEOleNCES ~ OPERATIONAL . - R..OWS ,~ nRD1'Y 0T1-ER HABITAT TEMPERA n.Ai WATER SPECES CONSEQUENCES ICE PROCESSES QUAUlY ~GAS SlftRSATLf'tATlON TOTAL AOOA TIC IMPACT ~ OTHER wnGATION ! M:T AOOATlC NPACT -~ oeOSlON NO 'tES of project operation under a part icular set of environmental constraints leads to the production of a range of operational flows and how the habitat consequences of these flows are derived.This leads to the total aquatic impact,which is then mitigated through the use of other mitigation measures.The result is a net aquatic impact,which is used with other input to dedde what flow regime is optimal for the project. Dr.Gilbertson went on to discuss Figure 2.The water quality variables on the left side of the figure are not affected by operational flows,whereas those on thE~right (i.e.temperature,ice processes and gas supersaturation) are affected to some degree by the flow level.It was suggested that this flow chart be handed out to policy and decision makers so that they have a better understanding of how the process works.Hank Hosking commented that it seemed to be a very useful diagram and he recommended that this be done. A general discussion of Dr.Gilbertson's presentation then followed.It was agreed that the material presented would be appropriate for the meeting scheduled for 20 December,1984 at which upper level management personnel from both the agencies and the Power Authority would be in attendance. -69275 850220 16 1 Meeting of December 20,1984 Those in attendance were: ..... .... John C.Stafford Bob Martin Dan Wilkerson Don McKay Carl Yanagawa Norman Cohen Dan Rosenberg Ben Rosenthal Ted F.Meyers Brad K.Smith Jim Thrall Richard Fleming Tom Arminski Jeff Lowenfels Gary Stackhouse Keith Bayha Carol Gorbics Hank Hosking Chris Godfrey LE!roy Latta Esther Wunnicke Jon Ferguson Wayne Dyok Joe Perkins Charlotte Thomas Alaska Power Authority ADEC/Anchorage ADEC/Anchorage ADF&G/Habitat ADF&G/Habitat ADF&G/Commissioner's Office ADF&G NOAA -Office of General Counsel,Alaska NMFS/Juneau NMFS/Anchorage Harza-Ebasco Alaska Power Authority Alaska Power Authority Alaska Power Authority FWS/Anchorage FWS/Anchorage Corps of Engineers FWS EPA DNW/DLWM/SCRO DNR Connnissioner Alaska Power Authority Harza-Ebasco Alaska Power Authority Harza-Ebasco Mr.Joe Perkins opened tlJ meeting.He gave a brief history of the Susitna Project,including a description of the site.Conditional power sales agreements are planned to b~signed by June 1985.The Power Authority considers a flow regime the most important variable in the project for two 69275 850220 17 - ..- ! .... reasons:1)it dictates how the project will be operated and thus is important to the financial feasibility of the project;and 2)it is the major environmental concern identified for the project.The final flow regime will incorporate the optimum balance of environmental and economic factors and considerations.The Power Authority wants the licensed flow regime to be one developed in Alaska. The purpose of the meeting was to inform the agencies of the Power Authority's proposed flow regime and to invite comments,input and discussion of the proposed regime.Mr.Perkins emphasized the Power Authority's expectation of cooperation and the importance of an Alaskan flow regime decision. Jeff Lowenfels outlined the FERC process ana reUu.1H.h::....:i.ose attending that the FERC decision will be based on 1)need for power and 2)environmental impacts. Dr.Gilbertson presented a brief overview of the rationale and criteria used to develop and evaluate alternative environmental flow requirements.He discussed the three criteria used in developing flow requirements:1) objective oriented;2)emphasis on critical/sensitive habitats;and 3) compatibility with mitigation policy. Dr.Gilbertson reminded those attending that the Susitna Project will have both the most impact and the most control in the Devil Canyon to Talkeetna (Middle River)reach of the Sus itna River.He reviewed the middle river habitats and avaluation species and presented alternative flow cases, including Case E-VI which is the Power Authority's recommended case • Case E-VI is recommended because: It mitigates impacts on rearing hallie",.:,;01:chinook salmon and other species • 69275 850220 18 ..... 2.It is compatible with mitigation policies. 3.It retains the economic viability of the project. Dr.Richard Fleming emphasized that other factors in addition to aquatic habitats (such as navigation and water qual ity)would be included in the development of a final flow regime. Tom Arminski reviewed the following goals for an aquatic settlement: 1.agency consultation and endorsement 2.adoption of a balanced flow regime 3.resolution of non-flaw-related aquatic issues 4.possible reduction of scope of FERC hearings He presented an economic analysis of different flow cases indicating the economic effects of the various flow regimes.Case E-VI strikes an equitable balance between the use of the water for fisheries and for power generation. Mr.Arminski outlined the flow refinement/adoption process and described the process for -resolution of non-flow issues,e.g.effects of transmission lines on fisheries. Ben Rosenthal of the National Marine Fisheries Service presented a proposed framework and procedures for settlement of issues (letter attached).Jeff Lowenfels responded that the Power Authority I s goal is the same as that proposed by NMFS. Bob Martin of ADEC asked which flow case the Power Authority was using in its negotiations with utilities.Wayne nyok answered that Case E-VI was being used. 69275 850220 19 """' ..... Norm Cohen asked how the flow regune issue would fit into the position papers process.Tom Arminski answered that position papers and the flow case refinement process were parallel. A discussion followea regCirU.l.n~the process to be used in determining the flow regime to be proposed to FERC.The discussion centered around what agreement on one issue meant and how final would agreement on one issue be. It was agreed that sign off on one issue did not constitute final and complete agreement by an agency or intervenor.At the end of the process, the total picture would be considered,with a view of how all the issues fit together.The Power Authority expressed the confidence that only minor revisions would be needed at the end of the process. Keith Bayha complimented the Power Authority on its consultation with agencies,noting the improvement over the past few years.He noted the workability of the process • Norm Cohen of ADF&G asked when an agreement on the flow regime would take place in the process.The response was that it would be at the end rather than mid-process. Richard Fleming commented that there was a difference between sufficient data for a decision ana per:Lt::ct information.He asked for the flexibility of the agencies regarding requests for data,keeping the difference in mind. Ben Rosenthal assured him that his agency was not asking for perfect data but rather was asking for data the Power Authority has so that the agency would understand how the Power Authority had arrived at its position. Brad Smith~NMFS,assured the Power Authority that NMFS was not going to make unreasonable data reques's,but would be asking for information the Power Authority already has. -69275 850220 20 Gary Stackhouse of FWS asked for consideration for agencies involved in the total project.including non-fisheries aspects.He would 1 ike to have information on that.Ted Meyers of NMFS asked for a written document of the procedures and process to be used in developing the flow regime to be submitted to FERC.The Power Authority committed themselves to providing that written information on the consultation process. The meeting was adjourned by Joe Perkins at 11:30 a.m. 69275 850220 21 UNITED STATES DEPARTMENT OF COMMERCE Nationa'Oceanic and Atmospheric Administration NationaL Marine Fisheries Service P.o.Box 1668 Juneau,Alaska 99802 •- December 19,1984 ..... Larry Crawford Executive Director Alaska Power Authority 334 West 5th Avenue Anchorage,Alaska 99501 Dear Mr.Crawford: Staff of the NMFS have recently net with your staff to discuss the initiation of the issues resolution process for the Susitna Hydroelectric Project.settlement discussions and inter-agency working group efforts are undeJ::way which are intended to n:!E!t the goal of no net loss of existing habitat value.Specific position papers are being developed for aquatic issues identified by your staff during 1983 and recently \tie have received a schedule indicating the release of those papers to the intervening groups. OUr agency acknowledges the desirability of resolving these issues outside of the fomal hearing process prescribed by the FERC and will continue to work towards this goal.To aceatq?lish this,a framework is necessary tmder which each issue could be effectively addressed and,whenever possible,resolved.We suggest that the following procedures might be .-adopted to achieve this purpose. A.Issue Papers .-i Since neaningful discussion is dependant upon info:rned participants,it is necessary that any attempts at resolving issues not precede the release of the resolution papers.These papers should present the scope of ilrpicts -associated with each issue,describe the available data fran research efforts,present practicable alternatives for minimizing impacts,and identify data gaps or additional data sources that will becate available in the future.In the least,the issue paper should state the position of the applicant relative to the issue. B.Initial Meeting The APA will notify the interveners and concerned groups of the date of the initial meeting for each discrete issue.'!he interveners IIUst be provided with the applicable issue papers and all necessary background reports at least two weeks prior to the initial meeting.In general,the purpose of this meeting will be to jointly review the issue paper in order to: c. -scope the issue in question~ -identify data gaps (i.e.infonnation unavailable to the interveners)~ -review rcethodologies and all available infonnation; -when sufficient information exists.to achieve resolution,agree on the fOI1TBt for and scope of resolution (Le.discuss the interrelationship of the subject issue to the other remaining issues and limit the scope of its coverage so that it would not substantively impact the other respective issues). Follow Up Meeting Follow up neetings would be held as necessary to review iterations of the issue paper,discuss additional pertinent data or issues and incorporate recarmended changes developed during the initial neeting.Such a neeting could be scheduled to allow the interveners and concerned groups sufficient tine to review any new nateriaL In general,one purpose for such a neeting would be to assure that integration of intervener and concerned group ccmnent was occurring.Draft language will be developed reflecting the resolution of ..-each specific issue and the concurrence of participants.SUch language will later be incorporated into a propose:i offer of settlenent,discussed below. D.Actual Resolution - Actual resolution will occur after discussion of all issue papers. Aquatic resolutions will be an1:xxli.ed in a proposed offer of settlerrent which will be negotiated arrong the APA and the concerned interveners in additional neetings.The proposed offer of settlanent will contain the draft provisions which ~re elicited fran those concerned in earlier discussions.Since one draft provision nay affect the total agreement and additional issues not addressed earlier nay develop during the settlem:mt process,this draft language will be subject to revision at such meetings if necessary.The proposed offer of settlement as we envision it will contain rronitoring language,be contingent on FER:incorporating it into its license as conditions to the license,and sul::mitted to FEPC as provided in 18 CFR § 385.602.No participant will be precluded fran presenting before FERC its views conceming any matters not discussed or agreed to in the settlerrent process including but not limited to any impasses reached,any issues unforeseen during negotiation or any new data or infonnation developed. This suggested framework is presented in the spirit of cooperation and hopefully it will inspire the sane fran all concerned. Sincerely, Robert \'1.MCVey Director,Alaska Region National Marine Fisheries service - - r Appendix B SOSITHA HYDROELECTRIC PROJECT Resource Agency COlmnents on "Evaluation of Al terntive Flo'w Requirements" (Harza-Ebasco 1984) -----._-----_......_------"._,--._-----------.--....,..-----"- IN REP'!.Y ReFIR TO: WAES United States Department of the Interior FISH AND WILDLIFE SERVICE Western Alaska Ecological Services Sunshine Plaza,Suite 2B 411 W.4th Avenue Anchorage,AK 99501 RECEIVED JAN 4 1985 -, -- 'ALASKA POWER AUTHORITY Mr.Jon S.Ferguson,Project Manager 02 JAN 1985 Susitna Hydroelectric Project Alaska Power Authority 334 West 5th Avenue Anchorage,AK 99501 Re:Susitna Hydroelectric Project Alternative Flow Requirements Report Dear Mr.Ferguson: This responds to the Alaska Power Authority (Al'A)letter of 7 December 1984, and transmits U.S.Fish and Wildlife Service (FWS)comments pertaining to the subject report,dated 12 November 1984. Operation of this project will seasonally alter water flows in the Susitna River and could adversely impact fish populations.Winter flows will be higher than natural flows as electrical demands:increase during the winter. Summer discharges will be lower than natural flows as power demands decrease and runoff water is stored.The APA has the objective of balancing water releases with demands for electricity and the biological requirements of anadromous and resident fish species in the Susitna River. In the mainstem flow evaluation process,the .AF~has relied upon field observations and computer modeling to determine:the habitat requirements of indigenous species by phenological parameters.Although the data submitted are incomplete,the FWS supports the intent of the APA to mitigate fishery impacts through water releases and side slough habitat modifications. However,it is the intention of the FWS to withhold final approval of a flow regime and mitigation plan until all currently scheduled data reports are received and reviewed,and all agencies'concerns are successfully resolved. Sincerely', ~~ File NO y ./<p...4 .r;Field Supervisor b (;'1 cc:NMFS,ADF&G,ADNR,~••\Rehel's:!:e He:?"Ifl --I-/~--- I.'~."••,,\"s r.i;oj '®:!--_- al~tLtl<' -AEPl Y to ATTENTION OF Regulatory Branch Special Actions Section DEP ARTMENT OF THE ARMY u.s.ARIilY ENGIH EER DISTRICT,ALASKA POUCH 898 ANCHORAGE.ALASKA 99606-0898 JAN 41985 RECEIVED JAN 11 1985 IDSKA PO\l"ER AUTHORITY Larry D.Crawford Executive Director Alaska Power Authority 334 West 5th Avenue Anchorage,Alaska 99501 Dear Mr.Crawford: RECEIVED .If\.~J 1 4 1985 ALASKA POWER AUTHOR1JiY - r I r- I This is in reference to your December 20~1984 meeting and report, "Evaluation of Alternative Flow Requirements,"on the Susitna Hydroelectric project.Although I could not attend the meeting,my staff found it informative and helpful. The process you.have used to develop your flow regime appears to be thorough,and the strategy you have developed for finalizing the fisheries/management mitigation and impact assessment should be effective. As you know,I will be making a permit decision on this project subsequent to the release of the final Environmental Impact Statement and the appropri ate permit review.That decision w'i11 be based on a review of public and agency comments,as well as an internal review of your project.Although our internal review of your project has been ongoing through the past year,through our review of your various documents, attendance at workshops,and review of your staff application,the final position on your proposed project will be my permit decision.That decision cannot be made until the appropriate public notice and review process has been completed. Although I am support ive of your strategy for sett1 ing the various issues over the next year,I am not ina pos it i on to make a fonna 1 commitment on any particular item.I will,however,continue to provide my staff's involvement in that process to raise concerns and/or issues which would invo1 ve the Corps responsibil it ies and our permitting authority. DEPARTMENT OF ENVIRONMENTAl CONSERVATION MEMORANDUM State of Alaska OFFICE OF MC:S:~~e~ONER OATE: DEC 2:·1984 Evaluation of Alternative Flow Requirements December 26,1984 SUBJECT: FILE NO: '.!..'~.:'.::~'.-~f;~'THC'1ITY TELEPHONE NO: Larry Crawford Executive Director Alaska Power Authority (J;AfM/!r- Special Assistant to the Commissioner TO: FROM: ... -In reviewing the -Evaluation of Alternative Flow Requirements· report prepared by Harza-Ebasco,Dated October 1984,the Depart- trent cOlll'l'ends the Alask.a Power Authority for accomplishing an evaluation of alternative flow regines.Although the Alaska Power Authority has chosen the al ternative flow strategy E-6 as the preferred managenent scheme,the Departnent is not prepared at this time to recommend any of the alternatives as presented. There are a number of other issues related to water quality whidl have yet to be fully addressed by the Alaska Power Authority. These were identified in an issues list prepared by the A.P.A., March 6,1984,and include concerns such as temperature changes, turbidity,gas supersaturation and pH.However,anticipated position papers reviewing these issues have not yet been made available for review. We believe that the flow regulation regime that is adopted can have substantial impact on downstream water quality conditions. Before the Department can advise on a preferred flow regime.the resource agencies need the opportuni t)i'to cl ari fy the vari ous water quality issues in conjunction with instream flow strategies. We antici pate that these concerns will be addressed in the near future by the A.P.A.in concert with the respective resuorce agency technical staff representatives.We will be happy to work with the Power Authority and other affe~cted resource agencies in re sol vi ng these concerns. BH/DW/dd cc:Richard A.Neve,Commissioner.ACEe.Juneau Chris Noah.Deputy Canl1lissioner,MEC,Juneau Keith Kelton,Director ADEC-EQ,Juneau Carl Yanagawa,ADF&G~Anchorage XC:J.r~~ J.~ ~.~~ - ..... ..... r -2- Should you have any questions concerning this information,please feel free to contact me.Should your staff have any questions,please contact Ms.Carol Gorbics of my Regulatory Branch,Special Actions Section at (907)753-2724. ,. Lieutenant Colone ,Corps of Engineers Acting District E gineer - .... r- ! Appendix C SUSITNA HYDROELECTRIC PROJECT Status of License Application Figures and Tables Related to Case E-VI o Table C-I • • •Figures o Table C-2 • • •Tables o References - - ,~ ..... - APPENDIX C TABLE C-I STATUS OF LICENSE APPLICATION FIGURES AND TABLES RELATED TO CASE E-VI NOTE:Exhibit E,Chapter 2 of the FERC License Application (February,1983)contained 222 Figures numbered E.2.1 through E.2.222.The following list presents the status of those figures that have been affected since the original License Application,by the Case E-VI flOlir regime refinementj additional dataj and by refined river-,reservoir-,and ice- temperature analyses. ~Table or Related Original Current Figure No.Text Other Comments Figure Number Status This Report This Report (Reference List pp.C-7,C-8) ,.,... E.•2.7 Superseded Ref.No.2,3 E.2.8 Superseded Ref.No.2,3 E'.2.IO Superseded Ref.No.2,3 B.2.39 No Change Tables E-ll,E-12 3.3.1 Additional Data Provided Figures E-2,E-3 E.2.40 No Change Tables E-13,E-14 3.3.1 Additional Data Provided Figures E-4,E-5 E.2.130 Revised Figures 2.3-1,2.3 Same as Table E.2.34 2.3-2,2.3-3 £.2.136 Revised Table 4.1-1 4.1/1.••2 Same as Table E.2.36 E..2.138 Revised Figure 4.1-1 4.1 Same as Table E.2.37 E.2.139 Not Applicable to E-VI 4.1 Applies Only to Case C E.2.l41 Superseded 3.4 Ref.No.9 E.2.142 Superseded 3.4 Ref.No •9..... 422282 850221 C-I Table C-l (Cont'd) -Table or Related original Current Figure No.Text Other Comments Figure Number Status This Report This Report (Reference List pp •C-7,C-8)..... E.2.l43 Superseded 3.4 Ref.No.9-E.2 .144 Superseded 3.4 Ref.No.9 E.2.145 Superseded 3.4 Ref.No.9 .....E.2.146 Superseded 3.4 Ref.No •9 E.2.l49 Revised Figure 3.3-6 3.3.1 E.2.150 Revised Figure 3.3-7, 3.3-8,3.3.1 1""" 3.3-9 -E.2.151 Revised Exhibit E-18 Ref 2,3No. E.2.152 Revised Exhibit E-19 Ref No.2,3 E.2.1S3 Revised Exhibit E-20 Ref No.2,3 E.2.1S6 Revised Tables E-l,E-S,E-8 3.3.1 E.2.1S7 Revised Tables E-l,E-S,E-8 3.3.1 E.2.1S8 Revised Tables E-l,E-S,E-8 3.3.1 E.2.1S9 Revised Exhibit E-2,E-6 3.3.1 E.2.160 Revised Exhibit E-3,E-7 3.3.1 E.2.161 Revised Exhibit E-4,E-8 3.3.1 E.2.162 Revised Exhibit E-S,E-9 3.3.1 E.2.163 Not applicable to Case E-VI 3.3.1 Applies only to Case C E.2.16S Superseded Ref.No.4,S E.2.166 Superseded Ref.No.4,S E.2.167 Superseded Ref.No.4,5 E.2.170 Superseded Ref.No.4,S r-E.2.171 Superseded Ref.No.4,S ,.... 422282 8S0221 C-2 Table C-l (Cont'd) -Table or Related Original Current Figure No.Text Other Comments Figure Number Status This Report This Report (Reference List pp •C-7,C-8)..... E.2.l72 Superseded Exhibits G-l,G-2 3.4.1 Ref.No.8 also new data this report E.2.l73 Superseded Exhibit G-l 3.4.1 "II " E.2.l74 Superseded Exhibit G-l 3.4.1 "II " E.2.l75 Superseded Exhibit G-l 3.4.1 "II II E.2.176 Superseded Exhibits G-3,G-5 3.4.1 Ref.No.9 also new data this report E.2.l77 Superseded Exhibits G-3,G-5 3.4.1 II " " E.2.178 Superseded Exhibits G-3,G-5 3.4.1 """ E.2.l79 Superseded Exhibits G-3,G-5 3.4.1 "" " E.2.l80 Obsolete 3.4.1 Not to be replaced E.2.l8l Obsolete 3.4.1 Not to be replaced E.2.l82 Obsolete 3.4.1 Not to be replaced E.2.l83 Obsolete 3.4.1 Not to be replaced E.2.l84 Superseded Exhibits G-6,G-8 3.4.1 Ref.No.10 E.2.l85 Superseded Exhibits G-6,G-8 3.4.1 Ref.No.10 E.2.l9l Revised Figures 3.3-20,3.3-23 3.3.2 F'"E.2.l92 Revised Figures 3.3-21,3.3-24 3.3.2t E.2.l93 Revised Figures 3.3-7,3.3-25,3.3.2 II"""3.3-26,3.3-28 E.2.l94 Revised "Figures 3.3-27,3.3-29 3.3.2 E.2.l95 Revised Exhibits F-22,F-25 3.3.2 E.2.l96 Revised Exhibits F-23,F-26 3.3.2 E.2.l97 Revised Exhibits F-24,F-27 3.3.2 i' l E.2.20D Revised Tables F-l,F-7 3.3.2 E.2.20l Revised Tables F-l.F-7 3.3.2 E.2.202 Revised Tables F-l,F-7 3.3.2 ..... 422282 850221 C-3 ''''' Table C-l (Cont'd) ~Table or Related Original Current Figure No.Text Other Comments Figure Number Status This Report This Report (Reference List pp.C-7,C-B) E.2.203 Revised Tables F-l,F-lO 3.3.2 E.2.204 Revised Tables F-l,F-lO 3.3.2 E.2.205 Revised Tables F-l,F-lO 3.3.2 E.2.206 Revised Exhibits F-2,F-7 3.3.2 E.2.207 Revised Exhibits F-3,F-8 3.3.2 E.2.208 Revised Exhibits F-4,F-9 3.3.2 E.2.209 Revised Exhibits F-5,F-lO 3.3.2 E.2.210 Revised Exhibits F-6,F-ll 3.3.2 E•.2.211 Not Applicable to Case E-VI 3.3.2 Applies Only to Case C E.2.212 Revised Figures 3.3-15,3.3.2 3.3-22 E.2.213 Superseded Exhibit H-l 3.4.2 Ref.No.B E.2.214 Superseded Exhibit H-l 3.4.2 Ref.No.Br- E.2.2l5 Superseded Exhibit H-l 3.4.2 Ref.No.B E.2.2l6 Superseded Exhibit H-l 3.4.2 Ref.No.8 f-E.2.2l7 Superseded Exhibits H-3,H-5 3.4.2 Ref.9No. E.2.2l8 Superseded Exhibits H-3,H-5 3.4.2 Ref.No.9 E.2.2l9 Obsolete 3.4.1 Not to be replaced E.2.220 Obsolete 3.4.1 Not to be replaced E.2.221 Obsolete 3.4.1 Not to be replaced E.2.222 Obsolete 3.4.1 Not to be replaced r 422282 850221 C-4 ---------------'-'-'--""--------_._--~-----"--....---------- - APPENDIX C TABLE C-2 STATUS OF LICENSE APPLICATION TABLES RELATED TO CASE E-VI NOTE:Exhibit E,Chapter 2 of the FERC License Application (February,1983)contained 58 Tables of data,numbered E.2.1 through E.2.58.The following list presents the status of those tables that have been affected since the original License Application,by the Case E-VI flow regime refinement;additional data;and by refined river-,reservoir-,and ice- temperature analyses. Original..... Table Number Current Status Table or Figure No. This Report Related Text This Report Other Comments (Reference List pp.C-7,C-8) ....E.2.5 E.2.6 E.2.7 E.2.8 E.2.9 E.2.10 E.2.15 E.2.27 E.2.34 E.2.36 E.2.37 E.2.38 E.2.39 E.2.40 Obsolete Superseded Superseded Superseded Superseded Superseded Superseded Revised Revised Revised Revised Revised Revised Revised Table D-l Table D-2 Table D-6 Table E-2 Table E-3 Table 3.1-1 Table 4.1-1 Table 4.1-3 Table 4.1-4 Table 4.1-2 3.2.1 3.2.1 3.2.1 3.2.1 3.2.1 3.2.1 2.3/3.1 4.0 4.1 4.1 4.1 3.2 Ref.No.2,3,7 (AQR067) Ref.No.6,7 (AQR025 and AQR026) Table B.54 Ref.No.1 422282 850221 C-5 ·-------:........-'ll1!l'_._..;;;"11'~~•_ 422282 850221 C-6 No.2 Harza-Ebasco Susitna Joint Venture.1984 (January).Water Surface Profiles and Discharge Rating Curves for Middle and Lower Susitna River,Volume 1.Draft Report to Alask~l Power Authority. - - No.1 APPENDIX C LIST OF REFERENCES Acres American.Inc..1983 (February).Susitna Hydroelectric Project.Application for License IEor Major Project,Vol.2. Exhibit B,prepared for the Alaska Power Authority. r ! No.3 Harza-Ebasco Susitna Joint Venture.1984 (January).Water Surface Profiles and Discharge Rating Curves for Middle and Lower Susitna River.Volume 2.Draft Report to Alaskli Power Authority. No.4 Harza-Ebasco Susitna Joint Venture.1984 (January).Eklutna Lake Temperature and Ice Study (With Six Months Simulation for Watana Reservoir).prepared for the Alaska Power Authority. No.5 Harza-Ebasco Susitna Joint Venture.1984 (April).Eklutna Lake Temperature and Ice Study (with Six Months Simulation for Watana Reservoir).Final Report to Alaska Power Authority. No.6 Harza-Ebasco Susitna Joint Venture.1984 (April).Reservoir and River Sedimentation.Final Report to Alaska Power Authority. No.7 Alaska Power Authority.1984 (August).Alaska Power Authority Comments on the Federal Energy Regulatory Commission Draft Environmental Impact Statement of May 1984;Volume 2B,Technical Comments -Aquatic Resources. -422282 850221 C-7 ..... - - No.8 Alaska Power Authority.1984 (August).Alaska Power Authority Comments on the Federal Energy Regulatory Commission Draft Environmental Impact Statement of May 1984;Volume 6,Appendix IV - Temperature Simulations,Watana and Devil Canyon Reservoirs. No.9 Alaska Power Authority.1984 (August).Alaska Power Authority Comments on the Federal Energy Regulatory Commission Draft Environmental Impact Statement of May 1984;Volume 7,Appendix V - Temperature Simulations,Susitna River Watana Dam to Sunshine Gaging Station,Open Water. No.10 Alaska Power Authority.1984 (August).Alaska Power Authority Comments on the Federal Energy Regulatory Commission Draft Environmental Impact Statement of May 1984;Volume 8,Appendix VI - River Ice Simulations,Sus itna River,Watana Dam to Confluence of Susitna and Chulitna Rivers. 422282 850221 C-8 .... I' -- .... .... .... Appendix D SUSITNA HYDROELECTRIC PROJECT STREAM FLOW TIME SERIES Susitna River at Watana and Devil Canyon (Harza-Ebasco 1985) """ r- ! ..... I""" I ..... SUSITNA HYDROELECTRIC PROJECT SUSITNA RIVER AT WATANA AND DEVIL CANYON STREAMFLOW TIME SERIES Report by Harza-Ebasco Susitna Joint Venture Prepared for Alaska Power Authority February,1985 - TABLE OF CONTENTS SECTION/TITLE LIST OF TABLES LIST OF EXHIBITS 1.0 SUMMARY 2.0 BACKGROUND 3.0 SCOPE OF THE STUDY 4.0 REVIEW OF ACRES STUDY PAGE ii ii 1 1 2 2 4.1 4.2. 4.3 4.4 Streamflow Extension Streamflow Transposition Adjustment to 1969 Streamflow Adjustment to 1969 Streamflow 2 3 5 6 ...... 5.0 GLACIER CONTRIBUTION 6.0 RESERVOIR EVAPORATION REFERENCES TABLES EXHIBITS 421493/TOC 850226 i 7 9 12 421493!TOC 850226 10 11 12 13 14 15 LIST OF TABLES TITLE Monthly Streamflow at Watana Monthly Streamflow at Devil Canyon 7-Day Streamflow at Watana 7-Day Streamflow at Devil Canyon Monthly Streamflow at Cantwell Monthly Streamflow at Gold Creek 7-Day Streamflow at Gold Creek Adjustments for Glaciers Waste Monthly Streamflows Adjusted for Glaciers Waste, Susitna River at Watana Pan Evaporation,McKinley Park Pan Evaporation,Matanuska Agricultural Experimmental Station Comparison of Monthly Temperatures Net Reservoir Evaporation,Watana Reservoir Climatological Data Monthly Percentages of Precipitation ii ..... LIST OF EXHIBITS No.TITLE 1 Streamflow Data Used in Time Series Analysis - 2 421493/TOC 850226 Mean Annual Precipitation Map iii - r - ~REAMFLOW TIME SERIES SUSITNA RIVER AT WATANA AND DEVIL CANYON 1.0 SUMMARY This report presents the results of a study made to update the monthly and 7-day streamflow sequences at the Watana and Devil Canyon dam sites.The updated steamflow series are given in Tables 1 through 4. 2.0 BACKGROUND Acres American Incorporated (ACRES)generated 32 years (1950-1981)of monthly and 7-day streamflow series at the Watana and Devi 1 Canyon sites (Acres,1982).The monthly streamflow series were derived using the streamflow data of the Susitna River at Gold Creek and at Cantwell.The resulting monthly series averages 7955 and 9056 cubic feet per second (cfs) at Watana and Devil Canyon respectively.The 7-day series were based on data at Gold Creek Station.The resul ting 7-day series averages 8201 and 9198 cfs at Watana and Devil Canyon respectively. R&M Consultants,Incorporated (R&M)and Dr.W.D.Harrison of the University of Alaska,have investigated probable monthly contributions of glaciers to the recorded streamflow at Gold Creek for the months of June through September.They constructed five scenarios of monthly streamflows for Watana based on different assumptions of glacier contributions. 421493 850226 1 3.0 SCOPE OF THE STUDY The major work items of the present study include: 1.Review ACRES'procedures used for generation of streamflow ser1es at the two dam sites and modify these procedures,if necessary; 2.Review the study made by R&M and Dr.Harrison on the contribution to streamflow by glaciers,and adopt the most appropriate estimates for possible use in ana.lyzing sensitivity of glacier waste on energy production; - -I, I .- 3.Add flow data for the water years 1982 through 1984;and 4.Estimate net reservoir evaporation for use 1n the reserV01r operation study. 4.0 REVIEW OF ACRES STUDY Streamflow series generated by ACRES at the two dam sites are discussed below.Comments and necessary improvements to these time series also are di scussed. 4.1 STREAMFLOW EXTENSION ACRES selected a common base period of 30 years (1950 to 1979)for the monthly streamflow series and used the available streamflow data at eight stream gaging stations (Exhibit 1)to estimate missing monthly flows at each station.An in-house computer program,based on the program FILL-IN developed by the Texas Water Development Board (1970)was used in estimating the data.The periods for which observed data were available and the periods for which the data were estimated are shown on Exhibit 1• .....421493 850226 2 ..... - The FILL-IN computer program is based on a multi-site regression technique which analyzes monthly streamflow series and estimates missing data.The program evaluates statistical parmeters (means,standard deviations,lag one auto-correlation coefficients and multi-site spatial correlation coefficients)and estimates missing data in which the statistical parameters are preserved. The primary objective of ACRES'analysis was to generate 30 years of monthly streamflow sequences at the Cantwell stream gaging station.These data were used with those at the Gold Creek stream gaging station to estimate flows at the two dam sites.A comparison of the statistical parameters of recorded and filled-in data series at Cantwell,provided by ACRES (1982),indicates nearly the same statistical parameters in both cases.Therefore,the 30- year streamflow series at Cantwell is considered acceptable.The monthly streamflows at Cantwell and at Gold Creek are given in Tables 5 and 6. 4.2 STREAMFLOW TRANSPOSITION ACRES derived the monthly streamflow series at the two dam sites using the following relationships: QDC =0.827 (QG QC)+QC I QW =0.515 (QG -QC)+QC II in which QDC =Monthly flow at Devil Can.yon Qw =Monthly flow at Watana QG =Monthly flow at Gold Creek; QC =Monthly flow at Cantwell The coefficient of 0.827 is the ratio of the drainage areas between Cantwell and Devil Canyon to that between Cantwell and Gold Creek.Similarly,the coefficient of 0.515 is the ratio of the drainage areas between Cantwell and Watana to that between Cantwell and Gold Creek. 421493 850226 3 - Transposition of flows by drainage area ratios is acceptable if there is no significant variation in seasonal or annual precipitation amounts over the two areas.This was examined by J,lsing a mean annual precipitation map (Exhibit 2)developed by the Soil Conservation Service (SCS 1981).The mean-annual precipitation amounts (MAP)upstream of Watana and Devil Cayon are about 37.4 and 36.8 inches,respectively.The MAP upstream of Gold Creek is about 36.6 inches.The di fferences in the MAPs upstream of the three locations are insignificant.Therefore,no adjustments to the estimated streamflows for differences in precipitation are required. The relationships given in equations I and II were not used to generate 7- day flow sequences.Instead,ACRES computed the 7-day streamflow series at each site by mul tiplying the observed 7-day flows at Gold Creek with the ratio between the drainage areas upstream of the site and that upstream of Gold Creek.The flows at Cantwell were not used because the 7-day flows were not generated at Cantwell for the missing period of record at the station. Since ACRES used different methods to generate the monthly and 7-day streamflow series,a check was made to evaluate the differences in the streamflow data if the monthly flows also were generated by using the method adopted for the 7-day flows. For a few selected years,the flows transposed by this method are about 3 to 10 percent higher than those generated by using equations I and II.The accuracy of streamflow records at the two gaging stations is fair to good with a probable error of !5 to !10 percent (USGS).Since the difference in the monthly and 7-day flow series are wi thin this accuracy,both series would normally be considered acceptable for reservoir operation studies. However,reservoir operating guidelines are now being refined to optimize project economic feasibility and to establish environmental flow constraints at Gold Creek under various power demand scenarios.Total energy 421493 850226 4 production 1S being estimated for both monthly and weekly reserV01r operation studies.The previous streamflow sequences g1ve inconsistent results in energy production because of the discrepancies 1n the intervenin gl1 flows derived from monthly and 7-day f low sequences. Therefore,computations were made to revise the 7-day flow sequences at the two damsites to provide consistent energy production between the weekly and monthly operation studies.The monthly flow sequences were assumed to be correct. 4.3 PROCEDURE FOR REVISING 7-DAY FLOW SEQUENCES The 7-day flow sequences at Cantwell,Gold Creek and the other six stations used by ACRES (Acres,1982)to estimate missing monthly flows at Cantwell, were reviewed.The purpose was to ascertain whether the computer program FILL-IN could be used to generate the missing weekly data at Cantwell and whether the generated data would produce consistent intervening flows with 7-day flows generated using equations I and II.It was concluded that, because of poor correlation among various stream gaging stations based on 7- day flow sequences,the estimated flows at Cantwell and consequently at the two damsites were unlikely to provide the same intervening flows as derived from monthly flow sequences.Therefore,the following procedure was used to revise 7-day streamflow sequences. 1.Assume monthly streamflow sequences derived for the Watana and Devi 1 Canyon damsites using equations I and II are correct; 2.Compute intervening flows for each month; 3.Compute 7-day intervening flow sequences from the monthly intervening flow sequences using the pattern of observed 7-day flow sequences at Gold Creek; II The term intervening flows means the flow coming solely from the drainage basin between the dams and Gold Creek. 421493 850226 5 4.Compute 7-day flow sequences at the damsites by subtracting the inter- vening flows,computed in step 3 above,from the observed 7-day flow sequence at Gold Creek; 5.Compute monthly flow sequences at the damsites using 7-day flow sequences derived in step 4 above; 6.Compare the monthly flow sequences derived in step 5 above with those derived by using equations I and II.Some discrepancies were noticed; 7.Adjust 7-day flow sequences derived in step 4 above until the monthly flow sequences based on 7-day flow sequences match with the monthly flow sequences based on equations I and II. The above procedure provided the same intervening flows from the monthly and 7-day flow sequences when compared on a monthly basis.In each water year, the 7-day flow sequence starts from the first of October.The flow for the last 7-day period of September is the sum of 8-day flows divided by 7.In leap years,the flow on the 29th of February was neglected since it 1.S generally insignificant.To compute monthly flows from 7-day flows,the !llJQll flow for a part of a week falling in a given month was prorated according to the number of days falling in that month. 4.4 ADJUSTMENT TO 1969 STREAMFLOW For the period from 1950 to 1979,the lowest mean annual flow occurred in 1969.ACRES made a frequency analysis of mean annual flows at Gold Creek and estimated a return period of more than 1,000 years for the 1969 (water year)flows.Since ACRES accepted a return period of 30 years for the selection of allowable reservoir drawdown and firm energy,the observed 1969 mean annual flow of 5,561 cubic feet per second (cfs)was replaced by a 30-year low flow estimated to be about 7,200 cfs.The monthly flows were then derived using this value and the ratios of long term mean monthly and annual flows. 421493 850226 The recorded monthly strea.mflows at Cantwell also were 6 f"" I I I .I - - replaced by a 3D-year low flow.The resulting 1969 streamflows at Gold Creek and Cantwell were used to compute the corresponding flows at the two dam sites. The 1969 streamflows included in Tables 1 through 4 of this report are those based on observed records to preserve the sample distribution of historical data. 5.0 GLACIER CONTRIBUTION Dr.W.D.Harrison and R&M have made a preliminary study of glacier contributions to streamflows at Gold Creek.The study resulted in five scenar10S of streamflows at Gold Creek each corresponding to one of the following assumptions. 1. 2. 3. 421493 850226 Glaciers were assumed to have net zero loss during the 1949-80 period,but there were annual variations in the waste.Annual contributions during the period were estimated using the Tangborn runoff-precipitation model (Tangborn,1980,1983)and used to adjust the recorded flows.The resulting flow series represents the condi tions of zero cont ribut ions from the gl aciers in each year. Glaciers were assumed to have wasted 25 meters (82 feet)during the 1949-80 period.Annual contributions were estimated using the Tangborn model,and used to adjust the recorded flows. Glaciers were assumed to have wasted 45 meters (148 feet)during the 1949-80 period.Annual contributions were estimated using the Tangborn model,and used to adjust the recorded flows. 7 ..... 4.Glaciers were assumed to have wasted 25 meters (82 feet)during the 1949-80 period.Annual contributions were estimated using the Tangborn model,and used to adjust the flow series resulting from Case 1. 5.Glaciers were assumed to have wasted 45 meters (148 feet)during the 1949-1980 period.Annual contributions were estimated using the Tangborn model,and used to adjust the flow series resulting from Case 1. The Tangborn model computes annual glacier balances by relating measured precipitation amounts and annual mass balance of glacier with differences in runof·f between a glacierized basin and a nearby non-g1acierized basin.R&M computed the model parameters using data for one glacierized basin,Phelan Creek draining Gu1kana Glacier,and two non-g1acierized basins listed below: Non-g1acierized Basin Ship Creek Ship Creek Caribou Creek Caribou Creek Index Precipitation Station Talkeetna Gu1kana Talkeetna Gu1kana .... ..... The resulting estimate of annual contribution by the glaciers was distributed in the months of June through September based on average monthly temperatures at Talkeetna and a base temperature of 43°F for thawing degree days,allowing for a lapse rate of about 3°F per 1000 feet between Talkeetna and the glaciers.The differences in monthly contributions between Cases 1 and 2 (scenario 4)and Cases 1 and 3 (scenario 5)for the period 1950-79 are g1ven in Table 8.The values in this table can be subtracted from those in Table 1 to obtain adjusted streamf10ws for Watana reflecting,respectively, 25 and 45 meters (82 and 148 feet)of net glacial waste during the 1949-80 period. .....421493 850226 8 ..... I The estimate of 45 meters (148 feet)of glacial waste during the 1949-80 period was based on two sets of photos taken in 1949 and 1980.Since the photos were taken without vertical and horizontal controls and the analysis was made only for East Fork Glacier which constitutes only five percent of glaciers 1n the basin,the estimate of 45-meters (148 feet)waste is uncertain.In view of this,R&M made another assumption of 25-meter (82 feet)waste in the computation.A brief water balance analysis based on available mean annual isohyetal maps of the basin and streamflows records at the Susitna River near Denali and the MacLaren River near Paxson indicated that the glacial waste during the 1949-80 period is more likely to be in the order of 22 meters (72 feet). Currently,pertinent data are not available to verify the estimated historic waste or mass balance of the Susitna glaciers.Regardless of how much effort is made to reconstitute historical wastes of the glaciers,the resulting estimates would be highly uncertain.However,in the absence of any better information,the glacier contributions as estimated by R&M and Dr.Harrison (Table 8)could be used through a sensitivity analysis to evaluate their effects on power production.The streamflow series at Watana adjusted for these contributions are given 1n Table 9.However,the contribution from the glaciers has been completely removed or greatly reduced in the adjusted series shown in this table.There 1S no established evidence that such a situation will occur when the Susitna project is placed in operation. 6.0 RESERVOIR EVAPORATION Net evaporation from the Watana and Devil Canyon reservoirs is estimated to be negl igible.The procedures used in the estimation are di scussed below. Pan evaporation data near the Susitna River basin are available at McKinley Park,elevation 2,070 feet above mean sea level (ft,msl)and the Matanuska Agricultural Experiment Station,elevation 150 ft,msl.These data are given in Tables 10 and 11,respectively. 421493 850226 9 - - - - r I l Based on normal pool elevation of the Watana reservoir (about 2,185 ft,ms1) and a comparison of monthly temperatures at Watana and McKinley Park (Table 12),the pan evaporation data at McKinley Park is considered applicable for Watana.The mean monthly evaporations for June and July at this station are about 82 percent of those at Matanuska.Using this as an a~justment factor, the long term mean monthly pan evaporation for Watana was computed as shown in Table 13. R&M measured pan evaporation at Watana from May 8 through August 31,1981. The June through August evaporation was about 9.42 inches (R&M,1982a).The long term evaporation for the corresponding period is 9.5 inches (Table 13). Table 14 indicates sub-freezing temperatures at Watana for the months of October through April.Because of ice cover over the reservoir,evaporation during these months would be negl igible.The mean annual pan evaporation is,therefore,about 14.7 inches (Table 13). Lake evaporation for the months of May through September was computed using a pan coefficient of 0.7 (see Table 13).This gives May through September lake evaporation of ab'out 10.4 inches.This value is close to the R&M's estimate of 10 inches of reservoir evaporation at Watana (R&M,1982a). Precipitation data at Watana are available since May 1980 (Table 14).This period is too short to compute long-term mean precipitation and mean net reservoir evaporation.The mean annual precipitation at Watana was estimated to be about 30 inches from Exhibit 2. Monthly distribution of precipitation at Matanuska and McKinley Park are given in Table 15.The May through September precipitation is 63 and 67 percent of the annual precipitation.Other precipitation stations near the Susitna basin also show percentages close to these values. Using McKinley percentages and 30 inches of annual precipitation at Watana, the monthly precipitation at Watana was estimated as given in Table 13. 421493 850226 10. I""" I'I' I, r- E cept for the month of May,the monthly precipitation amounts are significantly higher than the estimated lake evaporation. Net evaporation from a reservoir can be estimated by the difference between evaporation from the reservoir surface and evapotranspiration from the same area prior to construction of the dam.A comparison of the estimated annual reservoir evaporation with annual evapotranspiration as represented by the difference between precipitation and runoff (in depth of water)indicated that net reservoir evaporation loss for Watana would be in the order of one to two inches which represents a reduction of 4 to 8 cfs from the mean annual flow.This is negligible compared to the mean annual flow of about 8,000 cfs. Devil Canyon reserV01r is located under the same general climatic conditions as Watana,except at lower elevations.Therefore,net reservoir evaporation at this site also can be assumed to be negligible. 421493 850226 11 "')]1 1 1 D .~1 J TABLE 1 MONTHLY STREAMFLOW AT WATANA_._.(CFS) OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1950 4719.9 2083.6 1168.9 815.1 641.7 569.1 680.1 8655.,9 16432.1 19193.4 16913.6 7320.4 1951 3299.1 1107.3 906.2 808.0 673.0 619.8 1302.2 11649.8 18517 .9 19786.6 16478.0 17205.5 1952 4592.9 2170.1 1501.0 1274.5 841.0 735.0 803.9 4216.5 25773.4 22110.9 17356.3 11571.0 1953 6285.7 2756.8 1281.2 818.9 611.7 670.7 1382.0 15037.2 21469.8 17355.3 16681.6 11513.5 1954 4218.9 1599.6 1183.8 1087.8 803.1 638.2 942.6 11696.8 19476.7 16983.6 20420.6 9165.5 1955 3859.2 2051.1 1549.5 1388.3 1050.5 886.1 940.8 6718.1 24881.4 23787.9 23537.0 13447.8 1956 4120.3 1588.1 1038.6 816.9 754.8 694.4 718.3 12953.3 27171.8 25831.3 19153.4 13194.4 19·57 4208.0 2276.6 1707.0 1371.0 1189.0 935.0 945.1 10176.2 25275.0 19948.9 17317.7 14841.1 1958 6034.9 2935.9 2258.5 1480.6 1041.7 973 .5 1265.4 9957.8 22097.8 19752.7 18843.4 5978.7 1959 3668.0 1729.5 1115.1 1081.0 949.0 694.0 885.7 10140.6 18329.6 20493.1 23940.4 12466.9 1960 5165.5 2213.5 1672.3 1400.4 1138.9 961.1 1069.9 13044.2 13233.4 19506.1 19323.1 16085.6 1961 6049.3 2327.8 1973.2 1779.9 1304.8 1331.0 1965.0 13637.9 22784.1 19839.8 19480.2 10146.2 1962 4637.6 2263.4 1760.4 1608.9 1257.4 1176.8 1457.4 11333.5 36017.1 23443.7 19887.1 12746.2 1963 5560.1 2508.9 1708.9 1308.9 1184.7 883.6 776.6 15299.2 20663.4 28767.4 21011.4 10800.0 1964 5187.1 1789.1 1194.7 852.0 781.6 575.2 609.2 3578.8 42841.9 20082.8 14048.2 7524.2 1965 4759.4 23':;'3.2 1070.3 863.0 772.7 807.3 1232.4 10966.0 21213.0 23235.9 17394.1 16225.6 1966 5221.2 1565.3 1203.6 1060.4 984.7 984.7 1338.4 7094.1 25939.6 16153.5 17390.9 9214.1 1967 3269.8 1202.2 1121.6 1102.2 1031.3 889.5 849.7 12555.5 24711.9 21987.3 26104.5 13672.9 1968 4019.0 1934.3 1704.2 1617.6 1560.4 1560.4 1576.7 12826.7 25704.0 22082.8 14147.5 7163.6 1969 3135.0 1354.9 753.9 619.2 607.5 686.0 1261.6 9313.7 13962.1 14843.5 7771.9 4260.0 1970 2403.1 1020.9 709.3 636.2 602.1 624.1 986.4 9536.4 14399.0 18410.1 16263.8 7224.1 1971 3768.0 2496.4 1687.4 1097.1 777.4 717.1 813.7 2857.2 27612.8 21126.4 27446.6 12188.9 1972 4979.1 2587.0 1957.4 1670.9 1491.4 1366.0 1305.4 15973.1 27429.3 19820.3 17509.5 10955.7 1973 4301.2 1977.9 1246.5 1031.5 1000.2 873.9 914.1 7287.0 23859.3 16351.1 18016.7 8099.7 1974 3056.5 1354.7 931.6 786.4 689.9 627.3 871.9 12889.0 14780.6 15'971.9 13523.7 9786.2 1975 3088.8 1474.4 1276.7 1215.8 1110.3 1041.4 1211.2 11672.2 26689.2 23430.4 15126.6 13075.3 1976 5679.1 1601.1 876.2 757.8 743.2 690.7 1059.8 8938.8 19994.0 17015.3 18393.5 5711.5 1977 2973.5 1926.7 1687.5 1348.7 1202.9 1110.8 1203.4 8569.4 32352.8 19707.3 16807.3 10613.1 1978 5793.9 2645.3 1979.7 1577.9 1267.7 1256.7 1408.4 11231.5 17277.2 18385.2 13412.1 7132.6 1979 3773.9 1944.9 1312.6 1136.8 1055.4 1101.2 1317.9 12369.3 22904.8 24911.7 16670.7 9096.7 1980 6150.0 3525.0 2032.0 1470.0 1233.0 1177.0 1404.0 10140.0 23400.0 26740.0 18000.0 11000.0 1981 6632.0 3044.0 1790.0 1858.0 1592.0 1262.0 1641.0 14416.0 16739.0 27601.0 30542.0 11669.0 1982 5700.0 2650.0 1863.0 1700.0 1234.0 898.0 1190.0 10879.0 21444.0 20445.0 13206.0 13890.0 ,1983 5154.0 2132.0 1893.0 1797.0 1610.0 1427.0 1565.0 11672.0 20401.0 18761.0 20863.0 11192.0 1984 6821.0 2657.0 1939.0 1782.0 1742.0 1697.0 1654.0 10937.0 22958.0 421493/TBL 850116 I J 1 1 1 1 J ] TABLE 2 MONTHLY STREAMFLOW AT DEVIL CANYON (CFS) OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP 1950 5758.2 2404.7 1342.5 951.3 735.7 670.0 802.2 10490.7 18468.6 21383.4 18820.6 7950.8 1951 3652.0 1231.2 1030.8 905.7 767.5 697.1 1504.6 13218.5 19978.5 21575.9 18530.0 19799.1 1952 5221.7 2539.0 1757 •.5 1483.7 943.2 828.2 878.5 4989.5 30014.2 24861.7 19647.2 13441.1 1953 7517 .6 3232.6 1550.4 999.6 745.6 766.7 1531.8 17758.3 25230.7 19184.0 19207.0 13928.4 1954 5109.3 1921.3 1387.1 1224.2 929.7 729.4 1130.6 15286.0 23188.1 19154.1 24071.6 11579.1 1955 4830.4 2506.8 1868.0 1649.1 1275.2 1023.6 1107.4 8390.1 28081.9 26212.8 24959.6 13989.2 1956 4647.9 1788.6 1206.6 921.7 893.1 852.3 867.3 15979.0 31137.1 29212.0 22609.8 16495.8 1957 5235.3 2773.8 1986.6 1583.2 1388.9 1105.4 1109.0 12473.6 28415.4 22109.6 19389.2 18029.0 1958 7434.5 3590.4 2904.9 1792.0 1212.2 1085.7 1437.4 11849.2 24413.5 21763.1 21219.8 6988.8 1959 4402.8 1999.8 1370.9 1316.9 1179.1 877.9 1119.9 13900.9 21537.7 23390.4 28594.4 15329.6 1960 6060.7 2622.7 2011.5 1686.2 1340.2 1112.8 1217 .8 14802.9 14709.8 21739.3 22066.1 18929.9 1961 7170.9 2759.9 2436.6 2212.0 1593.6 1638.9 2405.4 16030.7 27069.3 22880.6 21164.4 12218.6 1962 5459.4 2544.1 1978.7 1796.0 1413.4 1320.3 1613.4 12141.2 40679.7 24990.6 22241.8 14767.2 1963 6307.7 2696.0 1896.0 1496.0 1387.4 958.4 810.9 17697.7 24094.1 32388.4 22720.5 11777.2 1964 5998.3 2085.4 1387.1 978.0 900.2 663.8 696.5 4046.9 47816.4 21926.0 15585.8 8840.0 1965 5744.0 2645.1 1160.8 925.3 828.8 866.9 1314.4 12267.1 24110.3 26195.7 19789.3 18234.2 1966 6496.5 1907.8 1478.4 1278.7 1187.4 1187.4 1619.1 8734.0 30446.4 18536.2 20244.6 10844.3 1967 3844.0 1457.9 1364.9 1357.9 1268.3 1089.1 1053.7 14435.5 27796.4 25081.2 30293.0 15728.2 1968 4585.3 2203.5 1929.7 1851.2 1778.7 1778.7 1791.0 14982.4 29462.1 24871.0 16090.5 8225.9 1969 3576.7 1531.8 836.3 686.6 681.8 769.6 1421.3 10429.9 14950.7 15651.2 8483.6 4795.5 1970 2866.5 1145.7 810.0 756.9 708.7 721.8 1046.6 10721.6 17118.9 21142.2 18652.8 8443.5 1971 4745.2 3081.8 2074.8 1318.8 943.6 866.8 986.2 3427.9 31031.0 22941.6 30315.9 13636.0 1972 5537.0 2912.3 2312.6 2036.1 1836.4 1659.8 1565.5 19776.8 31929.8 21716.5 18654.1 11884.2 1973 4638.6 2154.8 1387.0 1139.8 1128.6 955.0 986.7 7896.4 26392.6 17571 8 19478.1 8726 •.0 1974 3491.4 1462.9 997.4 842.7 745.9 689.5 949.1 15004.6 16766.7 17790.0 15257.0 11370.1 1975 3506.8 1619.4 1486.5 1408.8 1342.2 1271.9 1456.7 14036.5 30302.6 26188.0 17031.6 15154.7 1976 7003.3 1853.0 1007.9 896.8 876.2 825.2 1262.2 11305.3 22813.6 18252.6 19297.7 6463.3 1977 3552.4 2391.7 2147.5 1657.4 1469.7 1361.0 1509.8 11211.9 35606.7 21740.5 18371.2 11916.1 1978 6936.3 3210.8 2371.4 1867.9 1525.0 1480.6 1597.1 11693.4 18416.8 20079.0 15326.5 8080.4 1979 4502.3 2324.3 1549.4 1304.1 1203.6 1164.7 1402.8 13334.0 24052.4 27462.8 19106.7 10172.4 1980 6900.0 3955.0 2279.0 1640.0 1383.0 1321.00 1575.0 11377 .0 26255.0 30002.0 20196.0 12342.0 1981 7335.0 3382.0 1841.0 1958.0 1839.0 1470.0 1898.0 15789.0 18387.0 31679.0 35256.0 13033.0 1982 6384.0 3270.0 2207.0 2086.0 1559.0 1094.0 1574.0 12490.0 24439.0 22877 .0 14535.0 16427.0 1983 6272 .0 2454.0 2192.0 2098.0 1858.0 1596.0 1781.0 13777.0 22789.0 20295.0 23203.0 12731.0 1984 7696.0 2976.0 2144.0 1953.0 1888.0 1828.0 1772.0 12425.0 25410.0 421493/TBL 850116 ..... I .-- .... TABLE 3 7-DAYSTRE:AMFI.CW AT WATANA (O'S) _YEa.A""ljI_;...-.__----------------------------------------195UI0810.~827.35j2.31q5.c81t.2511.2114.2078.1430.1430.1333.1105.949. 8S3,a~3 8<0 925.925.817~5 71.529.597 598.500 bU5.b74 • bSI.bse.714.R~8.194&.0733.11496.11941.15004.14379.13935.22008.10205. ___toIa2.pa.lI 1 9 5<1 2Paz 211117 '9 44 9.1 77 91,14bbB 11076.7789 8830 ..9{0 00143 1951 ~421.3940.j4~t.1963.1237.116S.1093.1033.98S.925.925.925.925. ,.,-__a~".auT eu'8"1 757 b 90 °9 0 "90 *'0'ba?62 2 baa b?? &51.639.12~S.~234.5178.14572.10205.804S.14019.24843.17911.11388.10037. ____..J.L451,?o41Q.li5ttJ 111O!l7.1jSOI9 14812 157'\7.15411 1 21527 ?5275.IS7QLUacll.15M9. 19S2 7700.S190.3772.i9jl.2943.26q5.1992.1970.1838.IS98.IS98.IS98.1598. _--.--1362 13"5 13"5,13"5,n29 841'8411.841,7g8.zan.7AO,740.Z"O. 774.774.774.774.10~2.1273.1742.3772.18440.20Ro6.29SS2.]c050.28302. 2.5233.1cS"b 21095 228"1 3'3'8 2 '083 'b55 A 'iSb6 145 7 2 '58"'10.7 40 9i ZA.'26 M b lq53 ~370.e737.00~2.4433.420S.3580.2295.2811.2n~2.1430.1430.1430.1430. __._·__-997.q~S 9<5.925 82 4 •bOO,6 00 •bOO.bOO 6 00 ago.b9 0 •690. 782.702.120~.2tu2.118dl.14139.12B06.221c8.17443.29528.22800.ld500.21719. _.._llnIO,'53bA '0 710 ,17371 21C:b3,1d3l\o.U728.15IbO.t8Q79.15797 1439'12001 IOU' 19~~b827.5&02.~IS4.3311.2019.1910.170&.104&.1502.1201.1201.1201.12bl. 1'17 10u3 10 93 'OSt3 adS eu'B4I'8u1 7 0 2 &56-.056 6Sb 6Sb 732.732.1256.13A~.S~70.1u3~1.10734.191~S.lo139.21407.205oo.1972S.23978• ..2.a5-qjl..lbLl?2 '''9/7 15977 2b'd8.2tl!t12 2Il1P.20'R2.'0',,!1 Sa9S 11773 lIj9t20.HOS7. -1955 5~~6.5137.3808.jaos.3099.2523.2379.2102.2030.1850.1814.1598.1598. ___--J,.b.7 0 1b{l2,I au 2,)345·,I 27 3 I pI 11 77 •071 I Db 9 925.925 925. 925. F'"10u9 •1009.1000.100 9 •2991.3784.4421.13238.1l4656.17094.21870.3u236.28314. ,.26 7 ...7 2AQIU '...536 22'0"19 0 1b t7SZS 1803 12 1923 313 18 • ' 05"2 P038 19271 'j2/Ul 19S~bOdS.44dO.~b~8.3143.2090.17bo.1b22.1430.1333.1093 •.109].1093.1093 • ._--A~8~-82",BcA.821.81 6,Bib.816 805 790.790 790 790. 799.799.799.799.2114.9S86.13b83.27221.18236.28134.3061S.20865.23701. _.._.__2.'""11,L.20045 209Q9.202M,anA;!2"194 2!eb'un!,1489 6,'34 5 4.1 MM.1,,3SO.1 USa. 1957 bOS5.bOSS.~10~.3764.l1S9.2b91.2S03.2439.2318.2018.1958.1598.1598. l45 A IU~o l"i n 1"30 1358 12b 1 120 1 120',1'5',na9 lon9 10119 10119 10u9.100Q.10v o •111UO.~87\.A8A1.1905.177u7.25996.3148b.27822.24&86.10902.r-__-..,..-l.~L.uQ 'SS,2"11.),21 e 15.I Zbn.176 t 1•PSl 5 100b'.17179 15905 17359 t M78 '052 4. 1956 dod9.7454.oObO.o2od.4~05.j802.3254.2075.3015.~628.j095.2308.lA7A. _.~o/J,2 1790 1502 ,,,78 IUS 12".10 9 3 •1009.10 e1 9.'009.9t:1S.925.925 10U9.1129.12~S.1Ad5.3355.0629.q202.1763S.1dS48.23S~5.235~5.20302.10~QO. __--10500.'0500 'oS ..o ''1''0 325"'\149 17190 ',,935 97 18 7148 7'48 555 0 "3"3 lq~9 50~~.~Q33.4291.20~3.251t.~180.1862.14}0.1285.q25.1021.15~8.1~98. 13"9 1201. 1201.1177.1171.1171.1129.1009.930.R24.824.e24.e~q. 841.~41.12ul.12bl.2 4 03.3820.10314.23113.1&77b.218d7.10350.19905.218U3. ".....2G2UO 2.311 2"Ocj9 11$2~b.2uQQb.1Sbo5 cOI10 37ttHL30303.24B9.1240Q.(HoS.IUOn. 196u 9010.0223.j4~4.4277.2931.2~23.241S.2210. 2150.1850.1850.1850.1850. 17Ua.IbM2 15"2 143 0 1358 lab!1237 1177 11141 1093.10u5.025.q25. 025.oi5.1211.12bl.40~S.03ql.123l!o.19221.2U422.12073.12517.129b2.1~297. __1-9281 1M2 9 S,l n 4Hb,US..a-200gS,?13,o,3 18896 16200.17539 154iJL2J+U8.tl25L1t+7b4 • 19b1luS35.;652.~4~2.3904.3015.2775.25S9.2270.2318.2939.2391.21v2.21v2. -203°.2°18,,.>078,21!!2 1850 1514 U9Q 1430.1358 12010 n06.17 0 0 •.17M. 2102.21v2.~31R.c355.b019.10092.1o5uO.17623.1b&o2.1S9S3.2&OS6.3255S.27353. ____1-93"12"3;.2 2 1 023 21 17 9 2 1 5/)3 2 18 b31i'lbb8 117 19 13'bb,l 114 51 11657 '129?12096 _:19t-2 0700.3.08.38b".3ao~.29 55.2270.2270.2270.2126.17b6.17b6.17&6.1700 • ._--1.b22,159 8 ,15 98 ,15 98 ,1"54 12h 1 12bl.12bl 1225 1177.1I77.1177.1171. 1430.1430.1430.1430.~111.3784.10211.1S130.23942.25407.493Q7.42237.2QQOO. ___..U8bl.-22320,T<,jAl,j9,V801 21'01 193 4 1 19,"1 19341 19701 198?1 125J7.1uB9.11bQ5. _. I""" I ...., - I~ """' - , (CFS) 19&3 76q4.5859.510~.~613.3111.2355.2355.2355.2102.1&82.Ib~2.1&82.1&~2. ___13'14.13~S.13~5.13~C;.13v~.1201.12&1.12&1.1081.841.841.841.841. 698.6~~.&98~~y~.2242.285~.10121.260b8.30008.21803.21803.218&3.218b3. 2bI88.3$~5Z.34g74.27389.23377.?lt43.18344,19491,10434.12734.11388.~106.~232. 1964 74b2.0300.5154.jQ04.2427.218&.1~34.1598. 1550.1430.1382.1093.1093 • .._~~~2~.8p5.f\~I.841.841,824.762.724.b48.621.555.555. 5~7.597.b~8.&5&.728.877.1177.2606.24378.63092.43330.30159.20152. 21335.21qb4,2y7~~.14235.10014.15749.12&98.13539.11436.9548.7181.7824.7657. 1965 &456.7225.4728.3701.2590.2385.2301.2631.1710.1152.1027.933.933. 825.~07.897.8u1,771,72),123,723,738,757,757.757. 757. 992.q92.1252.1295.1691.452 4 •7880.14199.28290.18476.19737.10860.27702. 25527,2S7~4.2>qI8.2U794.1ij692.10542.2S551,17130.9538.14108.17407.15929.21059. 196012&8&.7053.j3U4.2733.2325.19U4.1602.1604.1538.1442.1394.1337.1287. _.....1....1~9._l.1177.1177,1177.11"11.1093.1093.1093,1093.to-n.1093.1093.10 cn. 1261.1201.16~8.1721.1.~535.3268.&055.11604.18212.4UOY9.28099.24242.204S8. 15077.14Q>2.1S0<9.176~3.235S7.19Zb9.1sa45,19197.lS309,lQ8jp.lu;23.1U4Q3.9673. 19&1 5878.59~1.i9~n.2018.1454.1345.134~.1345.1321.12~1.(2~1.1201.12al. ______.~Qt.1201.12bl.1201,122S~1117, 1117.1177, 1105,1099,1009,10U9,1009. 925.925.9~q.1093.14~6.4145.14416.Z9170.24242.223~4.29275.2~398.2j870. 1d127.18055.2S1U7.2~ab3.2278ftZlQ5Q.40!9t.25732,1733S.24440,144Z7.1~487,9108, 19h8 57QJ.~7q6.3750.2859.2403.2042.1934.1662.1826.17b6.1766.1694.1662. IbCl2 1 M2 1M2 1058 1598 159!!1598 1598 1596.1596.1598.159"'0 IS9R. 1574.1514.15~6.Ib94.1886.2475.11004.28459.231&1.22248.309b9.31402.22861. ____~Z=M147.22S24.217q3.21QIJ.JO&aO.to936.IM09t.12734.11292,9478,9495.OOg3.5305, 1969-4256 •.:J,~f·2830.-2512 •2138.1658.-1261.1105.913..799.757.715.679. ___.649."~I'589. 589.589.589.601. 631.631.655.673.709. 733. 805.,.......1237. 1754.2859.5056.9615.16866.10149.10764. 13719. 15028.13647. _.11713."till-d.15232.-12734.11256. 12013.6222 •.5047.4703.~5300.4635.3974.3814. 197u 5313.~119.27j2.1844.1442.12ul.94q.841.7&7.757.72t.715.71~. 715 715.bdS.~13.b73.h73.OJ!.b3l,~31.631,643.673.073, 715.787.901.lO~3.1&34.l860.1j7~3.12409.15244.14271.137b7.1jOj4.21948. ZIQQ7.17b59.ln9<!l.lg091.2¢224.1q233.1~~bG.to794.11S92,luOQ4.796G.~109,,106. 1971 5901.~925.~012.5 4 12.33&4.3195.2907.2571.2307.21~2.2018.1850.1658. IAnb 13u9 I1Cl9 I !leAS.Q73 9?S.89 1 Mt.623 799,799.]q9,799, 811.8~1.913.10il.1225.1'98.2355.4157.7328.19221.39b79.24098.332~8. 20578 2U9\A ?Mlj4 15 7 Ql 2»462 37&29 3\636 2U626 1&374 19221 122&5.9274.Y198. 1972 0512.~83S.~4l9~j6~2.3027.,739.~5q5.24~1.2331.21do.21~6.~018.2018. ______'018 laso 18,0 lnSO 1850 1754,10d2 1&&2 1610 ISnb.1519.ISla.1490. 1450.1430.1370.11150.2847.lo45e.l0217.226u8.37204.20578.305~3.3~OU2.210j'. 213;5 21323 1::1 0 "11 1')497 pon 'd272 10758 17323 1159?I1Q68.1510Q lips!.57M. 1973 ~024.j724.~lob.3832.2b19.2138.1826.1662.1400.13~S.1201.1177. 1177. 1033,10UO,1009.10 119.tOllO,IOg9.loug 10.09.937.841.891.891.8qt. 841.8~1.~41.~ij9.1177.2258.773e.1U65~.13214.169q8.2d338.30&~5.2UI34. 17707,109<6 !e'8n"13815 l!t6qe p"a3 h091 18332.191.185 1077&.7519.0350.5895. 1974 ~730.5817.2~32.1994.1~10.1362.1273.11"5.£069.q&1.805.82i.7~9. In3 75 7 7<7 71 5 69 7 ,,13 Db!631 b3!hil b19 589.509. ~09.013.739.1177.2102.5~38.1U331.23005.2''308.104~6.140~3.13130.14019. ____.IVA7,11Ia]to?,,'''>617,1<1896.'5713 091:12 10639 lUOS 13971.7B~2.]CH5.1l 9 u2. 1975 ~o<7.'4599.21151.1034,11130.1430.1430.1430.1U18.13~5.131+'.1345.131+5, IB3 .2,,'12t"I?h!J2hl '2td pot 1213 1177.1177.1177.1177.117? 1177,11a 9 •12~7.1538,23Ql.57b&,12&74.19365,25b47,30oU9.22993,?8891,2582e. 2S125 2"1'13 2$!BA 2 1 8113 20>35 0 10386 ]:,653 H8tS !19 uS 9875 lOU?1')=05 !'jOnEL ,.,.. I - ..... - ..... ...., -I TABLE 3 (CCNI'INUED) (CFS) .-. 1910 8b49.7628.70e8.~145.2S83.2000.1574.1249.1009.901.925.889.841. 8Ml 8M!80,799 799,799 799 799 181 7107_7Ci07_7C;'L 757. 151.793.q~5.164b.4t08.11125.11208.11785.13563.~3293.250q5.1707t.17070. 1~253 toil!15"0 "15 8 5'"26°i3]"5 17 2 90.'328 6 94 0'b A9 9 5323 5359 bS ,7 1977 ~003.J310.Jlo2.l80b.2475.2283.i138.2018.2427.2283.2006.1898.1754. 1&4&1598 ,151"1 478 .,1"3 0 13 70 1345.13 45.1 3 09 12b1 Jib',Jie',l?b t 13~5.1345.1418.1490.1658.2 4 07.10523.1bI45.24554.29395.38434.319Uo.28470. U2fa 0 ?"3"?21 4 ';5.,t7851 18Ho 17935 lMlo,1059 D,IQ Sn,87 14 .12337.11 833 11381- 1978 7424.7532.b619.49j7.3712.3220.2901.ib91 ..2493.2318.2210.2150.1988. 18 ijD 1772 lob?'ble '52 0 )95 0 13b A 138 8 13 4 5.1345 13"5 '3 4 5 '3b3 13ij8.1368.13b8.1460.3063.1~55'.t4416.9754.10403.12q38.17471.1~376.19101. 1,70 4 17Q~1 1 7 0i3 1 1 ?bb 10098 10°73,14944 t2 4 0 9 ,8 98 6,9U3 0 ,8500,b39 0 ,5 4 5 0 1979 4554.5tu3.41~2.3093.jOU8.coi8.1970.1730.1658.1598.1454.1309.1201. 12iS.117 7 It 77 -11 77 1093 1 0 9 3 109 ]log''009.tona,1009.1009.IOQ9, lU09.1057.1105.1400.~307.~325.1uO~1.10097.2b~13.23113.19401.17515.21b71• •"17b.~lglD ••a7"$a7.93iii96.20'S"a,,1112.1n}"3 2.i75'79M·,8 773 91'38 8 '''3 u S 198~0035.~4el.~qlS.~370.409&.j720.41~5.~967.2823.~3U7.2078.18~8.1118. 1~10.15~8 la~A l1a~13#5 lias liiS 11 17 117 7 •1 '17 1177 ,J177 11 77 , 1177.1177.1237.Ib82.3484.8109.11701.10403.10680.27029.21299.27582.24062. ~~35~.2v7~1.2dile.i~347 l770Z.1 9 $"0 la QU a 10!~i liI5!.aaas.950&'5 977 119~9, 1430.1 4 90.1580.~O~4.47~8.17t54.17220.t1352.18452.15005t~223.15304.t7875. 1~992.b3qo 3t1S!,!7 'i~"ftL3.=4S9'3lla1l5,3929A 31137.20999.15124;12193,'11175 gAbS .1982 6425.6054. 6222.7216.3878.3316. 3243.2727 •.2378.2127. 2006.1934. 1934. 1934.1934.1934. 1934.1945.~1982.1447. 1051._925.925.925._979.1255. 1261.1261.1393. 1850.2842.~6811.12614.16938.·19100.21989.18380.'24266.23545. 16398.20277 ~..lQg~~.23125.19893.,13983.12169. 10620._11784.i1340.14199_22332.14069 •.., ..... r TABLE 4 7-Dlcr STREAMFlOW Kr DEVIL CANYCN (CE'S) .'!'EAI'L _ 195012126 ."---::'5'7'4-174-.-j~l:I::-o-l::-.-.):-:-5=-l:l....,4::-.-----::~""':'1-::5-::3-•.....",.2."..8.,...1tI"""-.-Z="=3:":7::-:2=-•.......,Z'""3'""3"""1-.--=-1-:-0"':"0'='3-.-1tI-0""'3"".-1::-4=-9-tl-•.......,I-:::Z:-I-:::0-.---.,.1-='0-0'=5-.------ I:IS7.I:Il3.1:130.1038.1038.1:110.&47.593.&70.&71.tl28.tl71:1.750. 730.738.8UO.QSl.~1~3.75~2.1289S.1331:13.10897.1o12q.1SbjO.24t185.18244. td824.20Ql3.218~6.238MI:I.2jbZ4.2t81~.12q55.to452.12423.8737.9904.otl97.0778. 1951 1011:151:1.~U20.385Q.ecuz.1388.130~.122e.1151:1.1105.1018.1038.1038.1038. 9c4.90b.QUb.I:IO~.841:1.773.773.773.741.698.tI~8.tl28.698. 730.1:141.1442.~~Qo.~807.10344.18171.2024.15725.278~5.2U020.12774.17288. ____~1~2~5~.2(qbO.21Q03.2uI98.29212.1btl14.1765t.17274.24146.28350.17011.1811:10.17527. 1952 ~704.5~21.4231.32l:lA.3391.3022.2234.2210.20b2.1722.1792.1722.1722. 1550 15«9 1501:1.1509.1267 9'13 993.993.895.830.OlO.630.830. 808.808.80~.Boa.112U.lu28.11:154.4231.2u083.23405.33147.35241:1.31813. 2Q051:1.1~514.2>901.2S642.3512'.23t147.1M5Q8.14094.10344.17813.1204t1.1u402.14222. 12531u510.~8uO.0822.41:172.471&.4015.2574.3153.2221.1&03.1603.It103.It1~3. 1118 IQ3A.103~.IOSB.~~9.77\.773.773.773.773. 773. 773.773. 877. 877.1411:1.~3S8.13326.1SASq.14431.24887.12~65.3jlZQ.25S74.2u818.Z 43b2. 19080 17259 1M791d9Qd9.2918&.20&16.1b~20.1Z0Q5.20Z79.17719.1bI42.'34bl.117l0. 1954 7t1~~.b350.~6~1:I.3714.22~5.e142.1'61.1846.It184.1415.1415.19 15.1415. ___~2"3 1Vb.12Uh IUb •.1105.993.1:193.993.85'1,HO.Hb.Ho.730. 8~I.8~1.1411.15ul:l.03t10.11~a8.16770.21518.2039t1.24011.23008.c2125.2t18~5. _____23025 Id919.179<1.119<1.293Z4.2~&S7.2lb>7.22b37.21b24.153Ql.13205.1e310.~037. 195~0131.~7b2.9331:1.~33q.347&.2830.<tl08.2358.2277.~07~.-2035.171:12.1792. 1673 18db Ibl7 15UQ 1926 1321 1321 1321.Jlq~.1038.1036.19~8.10}6. I1J2.1132.I1J2.1132.3355.4244.4959.19841:1.104 39.19174.31200.33915.31759. 3c294.209)5.20791.2980Q.21330.12713.2V2cS.2g591.35128.18554.19175.11521.1U301:l. 195t1 08~5.5025.40~2.35~S.2345.11:161.1811:1.1t1u3.1996.122&.122t1.122t1.1226. 907.929.1:I~9.1:1;9.Q20.915.91~.1:115.1:103.887.8~7.887.8d7 • 8~6.~~&.89&.~~b.2372.1~7S3.15347.3~533.2U454.31S57.41010.3u15S.205dS. 27407 2~86b 3vth2,Z9H55.2Yb9A 2713729523.19551.10708.15091.21155.20&lb.15091. I~S7 &791.0791.~h08.9249.3544.J018.2897.e735.2t101.22t14.~lY6.1792.1792. Ib3Q.lou3.lbu3;1M3.IS?3.1'115.1415 •.1415.1294.lU2.1132.1132.1132. 1132.1132.11~2.1132.3220.5'130.d8t1t1.198t11.21:1158.3531t1.312U6.21tlYO.ll:lI:lS8. 2169b,211117 2eS2b 29902.'9701 19753 19b4b.1nOI5.199g2.17840.19470.1~1:I31.2Q777• r I " .........•. . . a<.tl GOUe,1Z"i?tb:,7,137 9 13 •..1 P2b 1"2 , 1 32 1132 11ue;10 ~IL 1031'1. 1132.12~7.13111.1&05.3703.7435.1U389.19780.2UA04.2b410.20410.2i772.2u7~Q. ----2v7",0 2u7..,0 2v750 203qb.3b9d8 .259 b5.19262.15b30.10ClQI.d017.tlOi7.c22S.7115. 1959 ')tlS1 •"972.4757.Hul.c81t1.e452.20et 9 •1603.1442.1038.111015.1792.IH2. lab9 1/.11 5.1 3 ..8 13;'1321 1321 12b7 11 32 1043 9«14.924.229·Qi4. 943.943.134~.1415.~oq5.4205.1~298.2,92~.21000.24550.18331:1.21eS5.244Sb. 2 49tt !2j91l3 25 8 "'8 ?oqSg 2<529 175 71 ??5Sb 916b3 4°719 n070 J ?'9tH>10505 1I ve;. 19&01010tl.cCl(\O.3840.4727.32dR.e830.~708.2547.2412.2075.2075.207'5.e015. 1 913 16M I MQ.lb03.1523 1!!15.1388.1321.1280.122&.1172.10.>8.1036. 10~e.1036.1391.1'115.55e 9 •7108.13852.21559.221:100.13542.14040.14539.15201. 2!beb,lC Q34 1~44b.25?91.302~3 23I:1g4.?1195.20481.19&72.17274.27291:1.12341:1.10500. 19t111l~11.o5~3.01 011.4447.3382.3113.2870.2547.2601.2735.2&61.2358.2358. 2271 2?b A 233 1 ?35 8 2075 Ib98 1b71 1 b03.J523 1IU5.1577.19tH.II:1UI. c!3~8.e!358.c!~01.2t1"'1.081e.l11:122.20750.197t17.16689 .17894.Z222&.30515.30tldl. ---2 I &94,22772 2Sc,oO 2!lUl'L 291 db ?95,?3.2QI:I31:1.1ge75.1q7be.11723.1>291:1.12bo&.I~~79. 19&2 983&.433 9 •43.3 9 •43.39.3315.2547.2547.2547.a3d5.11:11:\1.19tH.1901.lCldl. 1819 )792.1792 17'72.Ib30.1415.1415.1'115.13711.1321,1321.1321.1321. 1003.If)03.161)3.lou3.3490.4294.115~I.l~1:I78.2&854.2d~oo.55400.4737h.33S38. -?Sb",?bQ~5 218 1 5 2564?29577 2 1 b 99 21b99 2 1 n9g 22098 22233 fQQ9Q.l1372.1jOd4. --- .-. ·1 TAmE 4 (CONTINUED) (CPS) 1903 ob~O.0571.5727.~174.3490.2041.2041.2641.2425.1880.1880.1360.18~6. _~1503 15/19 1500.15\10.IUbO.1415.1415.1415.1213.943.943.943.·oq3. 783.7~3.7d3.783.l~14.~2u7.16083.29239.33659.24523.24523.24523.24523. 29374 37971 3~91b 3il7?'2ba?'a371S luStS 217&1 18933 14283 12779.10214.)°355. 190q 6392.1 0 00.~701.4319.~722.2US?21b9.1792.1738.1003.1550.1226.1220. lObS 1038.970.9u3.943.0ul.924.877.813 726.b97.h23.&23. 070.070.U.o.Ho.817.984.1321.2923.27343.70707 .4do02.40S58.29334. 25930.2ub58 zsa70 159b7 16&35 176&5 19242 15186 12828 10709 K727.n77&.8589. 1~0~7?ql.~lu3.~3U4.4210.2905.2675:2~48.2951.1917.1292.1152.1047.1047. 0?6 90b 9n"gOb AbS 811 8tl at'827 849 849 8'9 B49. 1113. 1113.14U4.1453.1897.5080.d839.15927.31732.20723.22138.21155.31139 • 2nb33 2"875 2 b 895 2332 9 ay9b"lH554 266bO 19214.1Q&99.'5892.19529.178&7,23&21. 19601~220.7011.37uo.jOoS.2607.2130.1886.1799.1725.1017.1503.15UO.1443. 1358.13id.n.n 1321.12"0.1226 122&,1226,1226,lee".12<6,lUO,I<CO, 1 4 15.1415.1~~0.19~4.2843.jObS.0791.1301b.204?7.44977.32190.27191.2~947. 17589 '0790 1{5iP ,~a;9 2ba2'?!bI 3 17773 21532 172b1 12154,11604,11009,9IZ8. 1907 0593.4a21.~3~3.~2b4.1610.15Q9.1509.1509.1482.1415.1415.1415.1415. 1415 1415 1"IS 1915 1374.13~1 132t,'32',1240,11)2,1152,11)2,1132, 103~.1038.1005.1226.16~4.4b4q.lo10q.2?b23.2719t.25002.3~837.2730b.20773. 2u333,2 11 2S2 2n lo !328<3 2550 1 ,2 3 6<1 51755 28802 '944&3 27420 1j:dt$3,tI7&3,!O?tb, l~bO 0402.~319.~2u7.32u7.209~.2ZQ1.2to~.20&9.2048.19d1.19d1.10uO.1860. lBH6 18Mb 1 8 Mb '8,,9 1792 1 792 17 92 )792,1792 1792 1792,1792 1792 1705.Ib~8.177~.lQUO.2116.2770.12342.31921.25979.24954.34737.35222.2$642. 277S7,252bu,2A3d8,2i5b7 2 n9 S3,'d999 15 805 142 8 3 12bbb IObSt 10650 b A0 1,5950, 19b1i 4774.4122.3175.i8i7.2399.1859.1415.1240.1024.896.849.802.76l. ___728.707.660. 660. 660.660.674.-707.107.734.755. 795.822. 903.1065.1388.1967.3207.5671.10785.18918.11383.:12073.15388.16856.15307. ----_,1313~.16627.17085._14281.....12625.13474.'6978.5661.__5275.'5945.5198._44~]~427'::.,8.:.-_ lY70 5716.j498.~Oo4.2008.1017.134ft.1005.943.8d3.84q.8U8.802.802. 80?,8u2 h8 755 755.755 707 7A7,707 707,721 755 755, Ro?88J.1011.122b.1833.~35a.15415.1391q.170~q.lbOU7.1~442.14020.24018. 2$61)7 '!:I81j7 ?12d??Il?.,?29928 21572 tnbM,166U,HOQ3.1I221 0928 9095 5794, 1971 0019.~52q.ij5uO.J8~7.j773.3584.3201.2864.2567.2425.~204.~07S.18~9. lh u g 10,,9 IliA "Z2 1091 10 3 8 99 3 943 Oil.8\1"896.6gb 6Cib 2JOnl.23 4 db 2 /0 7 0 I 7611 22 9 74 AZi ll ?37 7 28 25 '35.''13,,5 ?IS59,l'757,l~4q2 ,Q311 !""'"1IH?73u4.0~4'5.~908.40'1&.3Jqo.3072.2910.c7"9.2614.2452.2452.e2011 .•22oa. -~_.~?fo)t1.,1075 cQ75 ,,01 5 207 5 19b 7 1Mb 18 ,;b 1806 a 1779.lb9 8 •16 9A •1 b7l lou3.Ibu-;.15.)0.Ibu3.3193.184bO.l~190.253Sq.41730.23081.40989.35890.24207. 2S9H 2$91 7 21 3 16 '73H?19°93 2,,994 11 797 '9t130.'3003 12 4 -3 7 ,17Q&l5 I CS3'banA 1913 41)1a.4177.~7qQ.42911.2q37.2399.2048.18~0.10-.4.1S0'9.1348.1321.13~1. 1159.1132 ,lU2.1 t U,lisa •J ,32.'132,1 1 52.10 5 1 943 943.993,995. 91.13.9q3.943.9~7.13~1.2533.8077.11952.1~822.190bO.317~0.34373.2c~83. ----198 0'.1 ..91:15.I A30 4 •t 5 01 96.1 nbS 4 •'983"1 SAnS 2uSb2 2 1855 12°ti b tHBA.71e3 bb12. ~1974 5310.42~1.c!9je.e2J7.l~uo.1'550.1 4 c8.13il7.1199.1078.910..923.890. aSh sgg a's an?7d?755.74 1 7Q1 70 7 707 b9A ftbO bQO obOe 667.8~q.1321.2 4 2'5.b212.11~oft.25871.2li57&.1841.10.1S751.14727.1S725. -1591:11,1 911 ."11:1211.1ZSJ7 lb708.r7620.15078 11933.1 bl 57 15671 ,8785,8878,13350, ~1975 5190.'j158.27 ..9.1833.1003.16uJ.16113.10u3.1590.15u9.15U9.15u 9 •15u9. ------l A9 b.11115.UI!S IAIS 141 5,1415 lOIS 136 I • 1321 i 321 1321 1321 •1321. nel.13.)4.l Q'j'5.17~'5.eOBl.bQo8.14215.21721.28708.34333.257~O.32QOo.28970. 259~B2Q2 20 753 ?w"Sh 228d5 ]d3Z9 17557 15 496 IUS3 1107&lt$7 5b 17571 11>929, -. -.-- ~ - ..."".... i""" I - ..... ! - - ..... TABLE 4 (CONTINUED) 7-DAY S'I'RFAME':r.t:AT DEVIL CANYCN, (CFS) 197~97~2.oSS6.78~2.4044.1234.2318.1IcS.14Ul,119~,1078.1038.997.9~3. 943,q~l.Ql0.696 •.e96.89&.896,896.876.849.849.84q.849. 849.11I69.llOS',_UAt6.4676.lJl~1.12U9,.13218.15213.2b127.28148.19821.19147. td23t.1819ff.173.1.177~6.2Q4at.2b140.1q403.14903.10548.7290.SQ71.cOOS.7310, 1977 ~5~7.j719.35~6.3148.~776.~~bO.c399.2264,2722.2560.2318.2129.1907. 1~46.17~2.4698.1657.16~3.1530.1509.1509.14oQ.1415.1415.1415.1415. 1509.150Q.15~0.1671.1859.3201.11804,18109.27541,32972.43610,35788.31934. 29481.22772,24005,20023.21020.20117.18406.186~1,11804.9774.13838.13272.12706, 1976 6327.~4'6R.14e4.')S38.4231,3611,3254.3011,279ft.c61H.2466,2412.22.10. Z10 •.\987.18*b,1812. 1705.1603.1556.15S6.1509.1509.1509.1509.1529, 1556.1556.1556.-~644,3436.11844,16169,10941,11669,14512.20158.17247.21492. ___2.l 047 .19551.1 'l1712 7.1 '390 .19090.10029.1 b7~2.13986.100 19.10577.9534.7to7.0113. 1979 )lU8.~724.4623.3410.3374,~948,2210,1940.1859.1792.16~O,1409.1415, \374.1321,13<1.13<1.12<6.1226.1226.1226.1132.1132.1132.1132.1152. 1112.Ild6.13~7.1644.c5~7,4851,11318.1~056,29873.259~5.217bl.1~640.24308. 2gBl4 2Qbug 2~.53 30614.25006 ?3391.1M8Yl.lbQM8.lg310.6911.8bdO.12774.11558. 198U 7442.'440.oo~S.49u2.4595.4173.4649.3328.jl06.2587.23Jl.2129.1927. 1806.1725.1&30.1550.1509.1442.1374.1321.1321.1321.1321.1321. 1321. 1321.1321.13~8.18~b.~9ue.~103,13124.11736.18716.3u317.23890.30937.20ge9. 295c3.29Q9!,310;1.<843t.31Ij9.<lAd2.2Ub83.18756.13636.9,70.1U602.17921.133§O. 1~81 92~9.12280,06~8.ib77.~393.j972.2904,3018.301~.Zld3.1664.1583,1523. 1982.1725.(Qua <lg9.21<,16.GZn.I.UO~ISO!.1415.11:115 •.15QQ,1530.155&. 1603.1611.1779.~304.S304.19241,19322.12733,2Q697.17571,159S4,17106.2U050. _____~8~9b95.308ub,34b15,3Q4u6.39103.4q074.3!92S.215S3.16964.13676.11413.1961q. 1982 7207.6791. 6979.8094.4350.,3719.3638.3059.2667.2384.2250.2170.2170. 2170. 2170.2170.2170.2183.!"2223.1623.1179._1038.1038.1038._1098.140S. 1415. 1415. 1563.2075.3194.'7640.14148,18999.'21424.24658.20616.'27218.26410 • 18392.22744 ••23122. 25938.22313."15684.13649.,.11912.1_3218.12720.~~27 ...25048,'15779._ ,. 1 1 -I --1 1 I 1 J----l~'l 'j J TABLE 5 MONTHLY STREAMFLOW AT CANTWELL* (CFS) YR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP SUMYR CALYR 1 4218.3 1824.1 924.6 838.3 662.6 562.7 618.3 7827.5 15670.4 16690.4 13901.9 5631.6 69360.7 1950 n A4.K x finn x 1.X 1 Efc h in)d inri E xxx J Liht Z iXXX~X 'leEK L "2Ln 6 'icR~P chnEE d iriE. 6 3293.4 1784.7 1105.3 930.6 797.6 491.0 563.2 3014.7 14675.8 16621.7 12900.7 6064.7 62243.4 1955 7 2465.1 1075.3 855.2 684.3 727.2 614.7 569.2 8231.9 20082.3 18916.4 14164.8 8487.2 '76873.6 1956 A Ajii ..I ..WiX..XAX""liAj HIli)riP,'"HXX,.hXliX P 'XJlili ri ,,1\;:,K ''''AX J'hARA J '4,1)'>ri 4ft?" 9 3410.4 2051.9 1096.8 876.9 592.2 454.1 689.9 3004.9 13973.2 15743.3 12723.2 4464.4 59081.3 1958 10 2690.1 969.6 733.6 661.7 644.9 501.2 671.2 7894.5 16362.3 15620.2 16790.6 8063.5 71603.4 1959 T1J71LO 1718.7 1181.7 1042.0 826.4 695.6 185.6 13750.5 11108.1 162!n.3 17056.1 12704.7 80817.7 1960 12 4625.6 2012.7 1534.8 1207.4 984.7 1056.1 1701.7 9688.0 15710.0 14820.0 16700.0 6725.0 76766.0 1961 13 3281.0 1800.0 1400.0 1300.0 1000.0 940.0 1200.0 10000.0 28320.1 20890.0 16000.0 9410.0 95541.1 1962 WI »-...,..,".".. ......--......... 15 3848.0 1300.0 877.0 644.0 586.0 429.0 465.0 2806.0 34630.0 17040.0 11510.0 5352.0 79487.0 1964 16 3134.0 1911.0 921.0 760.0 680.0 709.0 1097.0 8818.0 16430.0 18350.0 13440.0 12910.0 79160.1 1965 iRAX x 1ex x 1XR ri ZEX X zER K b1E X l4d1 ri ,bERX h .kaHn x 'ALdri K 22X~X L~XE'X ,Xl2 30 2345.0 1288.6 1032.3 878.5 808.3 746.7 870.6 6209.9 15598.4 18493.7 127.50.7 7320.9 68343.7 1979 31 17370.0 20460.0 14870.0 8570.0 1980 32 5472.0 2487.0 1658.0 1694.0 1186.0 919.0 1218.0 12150.0 14020.0 20870.0 22160.0 ~417.0 93851.0 1981 33 3829.0 1627.0 1297.0 1061.0 698.0 573.0 573.0 8219.0 16500.0 16540.0 11010.0 9942.0 71869.0 1982 --------""-"n'lX?x .,IPX A ..,.XliX K ,"XKX X ",PH X "'''"'IX..,x "IXri'" 35 5377.0 2130.0 1600.0 1500.0 1500.0 1481.0 1460.0 8481.0 18910.0 1984** *The Cantwell gage became operational in June,1980.Flows for the period Oct.1949 to Sept.1979 were generated by Acres American,Inc.using a multi-site regression model.Flows have not been generated for the period Oct.1979 to May 1980. **Preliminary data obtained from USGS 421493/TBL 850116 I )I 1 ]I I ]) I i I TABLE 6 MONTHLY STREAMFLOW AT GOLD CREEK (CFS) YR OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP SUMYR CALYR 1 6335.0 2583.0 1439.0 1027.0 788.0-726.0 870.0 11510.0 19600.0 22600.0 19880.0 8301.0 95659.1 1950 2 3848.0 1300.0 1100.0 960.0 820.0 740.0 1617.0 14090.0 20790.0 22570.0 19670.0 21240.0 108745.1 1951 3 5571.0 2744.0 1900.0 1600.0 1000.0 880.0 920.0 5419.0 32370.1 26390.0 20920.0 14480.0 114194.1 1952) x A XIX X ,4KX X ,'XX X dnR X dAR X .7,e X iXn1X X X1~XX'ARARK X hRPiA X ,eX1X X ,RAZXI i 1fiEq 14 6723.0 2800.0 2000.0 1600.0 1500.0 1000.0 830.0 19030.U 26000.0 34400.0 23670.0 12320.0 131873.0 1963 15 6449.0 2250.0 1494.0 1048.0 966.0 713.0 745.0 4307.0 50580.0 22950.0 16440.0 9571.0 117571.1 1964'>>x.x x~xx x ,.,x A,h x h?X X xxx K '~rX x 'AnXA x ne1XX x A1HIX X atiAK x 'nqrX x ,k,IX,'ihZE "J'OO.V JqV/.V ,,'V.V Lqq,.V LVJO.V ,JV.V LVO'.V 3745.0 32930.0 2395~.0 31910.0 14440.0 122470.1 1971 20 3822.0 1630.0 882.0 724.0 723.0 816.0 1510.0 11050.0 15500.0 16100.0 8879.0 5093.0 66729.0 1969 21 3124.0 1215.0 866.0 824.0 768.0 776.0 1080.0 11380.0 18630.0 22660.0 19980.0 9121.9 ·90424.1 1970 xx rAlid x "'ilX"X KXXX X iilK X iriIJ2 X hEX k iRdA X ""12 X "AHliX X R'ihEJ\X Ii.XiX X .JiiA X 'KKJ'iX i ift'1. 23 5847.0 3093.0 2510.0 2239.0 2028.0 1823.0 1710.0 21890.0 34430.0 22770.0 19290.0 12400.0 130030.1 1972 24 4826.0 2253.0 1465.0 1200.0 1200.0 1000.0 1027.0 8235.0 27800.0 18250.0 20290.0 9074.0 96620.1 1973 XE ~4~PJ X iEh~X iX~T X iS11 H 111 X 1XZ X AKA X .F.ftX X ',"'iX A 'A"XX K .'XXX A .ARPA X XXX44 1 iA1)'J J/JJ.V lJ~J.V lVJq.V O/q.V /II.V /,q.V ",.v 16180.0 17870.0 18800.0 16220.0 12250.0 90977.1 1974 ~O .JO/....V 40.)V.V .t....V.J.V .10~".V LOJ.O.V LJVV.V LOOV.V 12680-:-0-37970~O------Z2870~o-19240-:-0~1640-:-0--T20954:T-1977 26 3739.0 1700.0 1603.0 1516.0 1471.0 1400.0 1593.0 15350.0 32310.0 27720.0 18090.0 16310.0 122802.1 1975 27 7739.0 1993.0 1081.0 974.0 950.0 900.0 1373.0 12620.0 24380.0 18940.0 19800.0 6881.0 97631.1 1976 ~b qd11 X hZEX h hlX~X ,dXh X i2,0 n .Erin n 126ft h 'K2oX ri ~1n1X n XXd1X h .XXiX X 1K~}X X ,"nhe;i ih11 29 7571.0 3525.0 ~589.0 2029.0 1668.0 1605.0 1702.0 11950.0 19050.0 21020.0 16390.0 8607.0 97706.1 1978 30 4907.0 2535.0 1681.0 1397.0 1286.0 1200.0 1450.0 13870.0 24690.0 28880.1 20460.0 10770.0 113126.1 1979 31 7311.0 4192.0 2416.0 1748.0 1466.0 1400.0 1670.0 12060.0 29080.0 32660.0 20960.0 13280.0 128243.0 1980 32 7725.0 3569.0 1915.0 2013.0 1975.0 1585.0 2040.0 16550.0 19300.0 33940.0 37870.0 13790.0 142272.0 1981 33 7463.0 3613.0 2397.0 2300.0 1739.0 1203.0 1783.0 13384.0 26100.0 24123.0 15274.0 17783.0 117162.0 1982 ijl.Zdnll x Ji£"l"l n ,,'ll:o 1\1il\21:X innL x 12hX X iXXX X -------.-----...-- .J'"OO,4.V 40.JJ.V 4.J.)O.V 4£OJ.V L"O.V LO'V.V L'VV.V 14945.0 24113.0 21145.0 24500.0 13585.0 1IH021~o-1983* 35 8181.0 3153.0 2258.0 2048.0 1969.0 1900.0 1837.0 13250.0 26770.0 1984* *Preliminary data obtained from USGS. 421493/TBL 850116 - ..... ..... I , - ·J TABLE 7 7-DAY STREAMFLOWS AT GOLD CREEK (CFS) lq~0128S&.5740.~2uO;3800.33~3.iqS&.i514.2471.1700.1700.1586.1314.1129. 1°1",979,911b )JUO 1'00.971 bM.b29.71Q 7JL bob.720.eOL lqSl S2~7.4b~b.~Oql.2334.1471. 1386.1300.122Q.1171.l1uO.11~0.1100.llUO.aao 90 0 coo abO 000 sao a20.'20 7 8 b tao 7go 7AO ?ijQ 774.0~7.1~2Q.2&57.b157.1734q.19271.qSb7.1b671.2Q5~3.21300.13543.19071. 2!l729,2!1h3.2Pnb 2H114 21429 Pb14.187114.11"14 2560 0 •300 5 7 16671 1928t..18Q57. 19~~9229.b171.~4~b.~4~b.35uO.3204.23b9.2343.218&.19uO.1900.1900.1900. Ib#3 Hun.)bun.'bllO 13M3,lnu O •JOoo.logo.9"9 BriO 8esO.860 el$O. Q20.9iO.Q~O;Q20.l1Ql.1514.~011.4486.21Q29.24e14.3S1~3.3~114.3372Q. ?Zb~9 1~b?9 25066 2716b 37243 25 071 t9b#b.'Q9y3 17329 '6e~b 12 771 110;0 'S0bb 195311143.1u3~O.72J3.5271.SQuO.4257.2729.3343.242~.1700.1700.1700.1700. 11~6 l1uO 11yO 11g0 980 820 820 820 82 Q •820.820.8}0.820. 930.oJO.1504.25uO.14129.1be14.1~3uO.2b38b.20743.3S114.27114.22071.25eZ9. 20229.16271.·1981)2P657 256M',218S7 1151A 18029 >1540 1l$71$b 17114.'927'.'2980. 1954 811Q.0733.4 9 40.3937.i401.2271.~luO.lQS7.1786.15uO.1500.15UO.1500. l'ao 1300 "no '3no.1171 tQuO loon 1000 901,7ltO "0 'eo 760 870.870.1496.1600.b7~3.12286.199~O.22614.21571.2S457.244~7.214S7.2~514. 24"~b.1Y519 !~OUO.19000.311Q3,2"OuO 2 40 PO.)40yQ 230110 lbZ86.1"0~0 13057.9501. 1955 b~OO.olu Q •~6uO.46UO.36~&.~OOO.2829.i500.2414.22uO.21~7.1900.1900. 191:1b cOO O ,)71 4 ,Ib IlO •15 111 1''''0,!OIlO,UIlD.1271.1100 !tOO 1100.11PO 12uO.1200.1200.12UO.~~~1.~5uO.5257.15743.17429.20329.33143.35 9 57.33671. }Al"b 2"'5,7 2£0+,3 2 b3 ::,7 2Gb,."?091l0 alA"]2b o "372#3 '9b z ,'50<9 '??lA ,\>993 1~50 /236.~3i7.43~9.37~7.ia8~.21UO.1929.1700.1586.13uO.1300. 1300.13UO. 102b.Otto.·9J:l.O..-oM 91b 970.970 910 957 990.990.990.oliO. 9~0.950.950.950.c514.11"uO.lo271.3l371.21b66.334~7.43543.31971.281oo. ___2g.D.:l2.316hb,32ouO ''2io,3IV9,28771,200QO,2uY29 17714.10000 22g,?9 21857 10000. 1957 72uO.7200.4886.4500.·37~7.32uO.3071.2900.2757.24UO.2329.lQOO.19QO. 1729 1 7 ,,0 .70 0 17,,0.Jb14.'Sun 1500 '500 1371 12,,0 l?yQ J?uP 1200 12uO.12uO.12uO.12uO.3414.5757.9400.21057.5u914.31443.3~0~o.293S7.201uO. -----4l2-Ul-21329.2391 9 2.,993 .2i195 7 2 H9 413.2 1l !!?9,19100.21 14 3,\8914 20M3 )0071 2<Od· [95~1~333.~8o".1230.7454.5429.4521.~870.3181.J58b.4314.36~0.c744.2219. l"29 <129.laS 7 •17.,7.IAS7.laM',13 PO 1200.1)90.12YO 1171 1100.l1LO. 12uO.1343.14~7.17oh.3990.7~83.1InI4.2u971.22051.280Uo.28000.24143.22000. cinno <c'ouQz,.eo"n 21511 3"o8b 2 7 '$,)9 211 4 41 3 105 71 1 '5"7 "SuO 65 11Q "bua 7SH' 1959 ~091.~271.5043.35uO.2ge6.l6UO.2214.1700.152Q.11UO.1214.1900.1900. 155 7 1$00.1"29 IlIOO,14"0 1000,"413,120 0 ,POb.9HO.9,,0 91$0 9tlO" 10UO.10UO.14i9.I~UO.2e~7.4543.1~400.27486.22320.26029.19443.23171.25919• ZU"O 2:,3 4 3 2!a"z.21bdb.'38/:1,b te6?9.H9Il1 4"17'l!3,17'-2 870Q ue20 11137 1 20u7 19601u714.74UO.4071.5n~6.j4~6.3000.2871~27uO.~S57.2200.i2uO.22UO.e2uO. _O~Q ••0"0 170f"1'''0 1+]"1$00 1411 l"le 0 •'35,7 '3nO.'2#3 11\10 1100 1100. 1100.1443.1500.58~7.7bUO.146~b.2~~~7.242~6.14357.14886.1S414.1oq~3. 2?9~9 110"Q,195S7,20614.32QM3.2S4?9 224;1 21714 LUeS7 18314 '0993.2U514.11557. 1~611252q.9100.0471.4714.35~6.33UO.3043.2700.2757.29uO.~e43.2SuO.25uO. 241"~AllO,t411,?soo.22110.18uO.1771.1700 1614.1500 Ib71 2100.21uO. 17UO.17uO.l1uO.1700.37VO.~5UO.ll214.16000.28471.302~b.5ij743.5u229.3~557. ---'---..2.ZU6 laS"3 231.-0 271d6,2tlQ57.230uO.2300o.?,oOO 23429.)3571 1Q8Qb IcOSY ne7L ..... _. - TABLE 7 (continued) 7-DAY STREAMFLOWS AT GOLD CREEK (CFS) _.Lqb~lS0.b~07.0071.5400.3700.28uO.28UO.2800. 2571.2000.2000.'000.2000. Ib~7.IbOO.10uO.1000.1557.l~uO.1500.1500.1280.10UO.1000.10UO.10uO. ~30.~30.~>O.830.'~b6.3400.tqt71.31000.3S080.20000.26000.2bOUO.200UO. 311~3.4U2S7.3~t~3.32571.278uO.2~1~3.21814.23071.lq543.15143.13S~3.108?9.1uq79. lq~~....d~~7.74ql.~o."16"13.2Bdtl.'"00 ••noo.1900.113_43.17UO.10'13.1300.13uO. lilo.11uO.10~q.10vO.1000.10UO.9~0.Q10.801.770.73q.bbO.000. _..__.H ...o.710 L 770.7dL.-80b.1043.14110.>09Q.2d990.75029.51529.43000.311uO. 25371.201,,,3.2'''b71.109c9.l9757.l8720.l5100.1bl00.11bOO.113~4.9253.~3u4.910b, 19b~7077.aS91.rib¢3.#473.3080.~A>b.2807.312Q.2033.1370.1221.1110.1110. .... r- I I TAB~E 7 (continued) 7-DAY STREAMFLOWS AT GOLD CREEK (CFS) 1.!t.1~b....-'tA!1.03 5 7 ..Vq 3429 2957.1671.148b.t27I'1 U3.11.)0.1057,lOUU. 1000.10uO.qou.q50.950.950.950.950.929.qUO.~~O.9~0.9~O. f"'"_._"_.900,943 ,!Z1 li9 Us7 1 )9&+3 !suo "'0'4 'bPi 277yO 298M3 ?IQ!9 ?u3uQ, lq329.1~2o~.te3ab.16657.Z171U.27714.?U571.15aOO.l11a3.772q.~330.0307.7750. _.l.'i7L ~8";CI"'3-HDL.nne 2993.n'4.2543.Z400.<886.2714.2957.2257.CObb. 19~7.19UO.l&uO.17~7.17UO.16~9.I~UO.16uO.1557.1500.lSUO.lSuO.lS~O • ...1QJlll,IbuO IbM 1171 1971 U57 1<514 ,vaQ 292110 3US7 40340.379,,3 33857, 21714.2~1~3.Z~51U.212i-9.2c286.21329.1qS14.1972q.125111.10303.14611.116011.USl4. li 7 a'a8~9 n9»7 787'58 71 MOd'38 29 395 0 ,2n O 19b1 2 7 57 263b i5~7 23cQ c2lb.21U7.covO.lOci.1807.1700.16~O.16~0.1600.loUD.lbuO.16UO.loci. -__.,.,_,.l~5J1.-...lb.,Q laS o p.n.56s3 'tS"7 tlU3.116 Q O.J<U1 Is3bb.Cll371 1tI2eu••22Z 'HI • 2~31U.2u729.Zu9~7.2u557.2u21Q.l~t14.11771.14ai9.1Q6a6.11214.1ul09.7SQ9.0481. 1919,~IU.b-...Q09 ..9111.ibn '5 77 lP6,i3443,i O S 7 IOU IOPO.1729 1557 ISUO. 1 4 57.1 4 UO.14UO.14UO.1300.l3uO.13uo.1300.1<00.12uo.1200.1200.12uO. 12"Q li5 7 13Mb 17 9 3 ZlA3 "'''3 'ioll o '9 'A3 3'b Zt 2741$0.'3 071 2 08 29.':'771 2037t.2o00h.31757.3~"S7.2o51".248uO.20Qi9.170S7.15171.9447.9203.1JS~3.lC2~4. 1~f89o I"OJA -'0,)4,'2 '97 ,M871 &lAc""929 iSi'.5357 nne 2 n '.?lS7 2"9 3 • 19 14.lRc o •l7c9.1643.16uO.15co •1457.14UO.14UO.lOuD.14UD.1400.14UO. ___.-_~O.14,,0 JAn 2 0110 "141 3 9 7 1 A 1191 4 'i444 3.'g e ,.3 32 1M 3 25H9,3<6u O,28bI A • 313"3.31~UO.3~;57.3vl~3.3JOla.23200.21q29.1~886.14aS7.luS70.113u4.1~OUO.l~186. -J.,U)j19B,+9 nIlO 73 "}0°'9 "05%+,211 "M3 '200 Sa,In 2314 llab '079 'b'9 1~71.1~c9.21c 9 •e3uo.23c o •2414.201U.10UO.Isao.1500.lOUD.1~29.Ib~O. 17~.Q ..17 7 1,18 M b CJl"3,"a,?3,21H1lt O,C'1Il 4 15b,nSno '1 0 jl3,Jl:S6?9 ,,,91U,U?OO.?'2"'7. l1Rc9.4~Oob.Ull~3.307uO.3~6uO.301~7.407co.37029.2~971.179a6.14S~O.lcluO.112~b. 1982 7641 7200 7399 8581 4612 3943 3857 3243 2828 2529 2385 2300 2300 2300 2300 2300 2300 2314 2357 1721 1250 1100 1100 1100 1164 1497 1500 1500 1657 2200 3386 8100 15000 20143 22714 26143 21857 28857 28000 19500 24114 24514 27500 23657 16629 14471 12629 14014 13486 16886 26557 16729 1983 10429 8201 6677 3914 2971 2786 2643 2471 2400 2300 2300 2300 2443-2771 2400 2129 2000 1957 1900 2043 2086 1957 1814 1700 1643 1514 1500 1529 1786 2414'45~6 11086 19143 17000 24143 27343 19586 23886 23671 25371 21857 18243 19686 21014 26586 24629 21757 26529 18957 11729 10334 13574 1984 11283 9373 7946 5457 4843 3386 2943 2700 2514 2386 2286 2200 2129 2100 2100 2029 2000 2000 2000 2000 1943 1900 1900 1900 1900 1900 1800 1800 1800 1857 2800 6400 15643 23543 14543 18457 27700 25871 29100 NOTE:Streamflows for the water years 1983 and 1984 are the preliminary data obtained from OSGS • .... Table 8 ~~ADJUSTHENTS FOR GLACIERS WASTE (CFSJ Scenario 4 Scenario 5 Year June July Aug Sept June July Aug Sept 1950 1,632 2,244 2,376 612 2,952 4,068 4,308 1,104 1951 2,388 4,260 2,808 1,044 4,320 7,704 5,076 1,884 1952 2,208.3,072 2,280 312 3,996 5,568 4,140 576 1953 912 984 636 216 4,860 5,304 3,384 1,176 1954 2,263 -2,496 2,184 780 4,116 4,548 3,972 1,416 1955 1,860 3,936 2,316 516 3,264 7,140 4,,188 936 1956 2,436 3,360 2,988 276 4,368 6,024 5,376 216 1957 3,288 3,084 2,880 696 5,940 5,580 5,220 1,260 r-Bll 1958 2,412 2,628 2,124 144 4,380 4,776 3,840 264 1959 3,144-2,364 2,616 612 5,712 4,284 4,764 1,116 1960 3,252 3,852 3,048 408 5,904 7.008 5,532 180 1961 2,832 3,384 2,556 360 5,124 6,120 4,632 660 1962 2,868 3,960 2,976 0 5,208 7,176 5,388 0 1963 1,704 3,708 2,904 1,704 3,084 6,720 5,268 3,084 1964 2,244 2,880 2,076 804 4,056 5,208 3,768 1,452 1965 1,992 3,984 2,832 1,680 3,624 7,260 5,160 3',060 1966 2,712 2,964 2,280 924 4,920 5,376 4,152 504 1967 2,604 3,180 2,988 864 4,716 5,760 5,412 1,572-1968 2,292 3,312 2,712 168 4,140 5,988 4,908 312 1969 1,680 1,728 888 324 3,048 3,312 1,704 624 1970 2,448 3,816 2,820 0 4,440 6,900 5,100 0 1971 2,436 3,564 3,312 492 4,380 6,312 5,952 876 1972 2,196 4,500 3,300 0 3,996 8,172 5,988 0 1973 2,292 3,324 2,052 240 4,152 6,012 3,720 432 1974 1,896 1,968 1,896 792 3,444 3,552 3,444 1,428 1975 2,280 3,672 2,976 996 4,128 6,636 5,376 1,788 1976 1,416 1,824 1,524 300 2,568 3,300 2,748 552 1977 2,772 3,516 3,720 744 5,616 6,744 6,360 1,344 1978 1,200 1,872 1,992 564 2,160 3,396 3,612 1,032 1979 2,028 3,228 2,856 1,104 3,672 5,844 5,184 2,004 Source:R&M ..... -------~~--~~-~~~--~=--_........_--""--------_._--------- .... ..... ..... Table 11 ",m PAN EVAPORATION (INCHES) MATANUSKA AGRICULTURAL EXPERIMENTAL STATION r- Months Year May Jun Ju1 Aug Sep1Il"I0Iit 1951 4.16 2.21 1.79 1952 4.45 2.98 1.64 ""...1953 3.99 4.96 4.88 2.58 1.71 1954 4.74 4.80 4.10 3.03 2.23 1955 3.48 4.91 3.96 2.50 !"..1956 4.83 4.32 4.44 1.47 1957 6.41 5.45 4.80 3.59 2.03 1958 4.35 5.00 3.97 3.53 2.00 JW.lI~1959 4.76 5.23 2.79 2.82 1.46 1960 3.76 4.44 3.59 2.47 1.08 1961 5.18 4.17 3.40 2.41 1.62 1962 3.66 4.09 3.85 2.81 1.66 p-1963 3.56 3.42 2.50 1.48 1964 4.04 3.06 1.60 1965 4.18 7.19 4.34,....1966 3.56 4.08 4.36 2.60 2.25 1967 4.35 3.07 3.99 2.91 1.76 1968 4.57 3.56 3.30 1.66 1969 5.42 4.38 3.53 2.07 1970 5.03 3.13 2.36 1971 5.34 4.93 4.90 2.69 1.57 1972 3.43 4.06 4.90 3.79 2.63 ,1llI1l'II 1973 5.05 3.56 4.38 3.52 1974 5.06 4.96 3.96 3.79 2.20 1975 4.20 3.56 3.16 3.17 1.73 ,lIfIlfl'/flf'1976 4.22 5.34 4.55 3.21 2.13 1977 4.11 5.20 5.24 3.18 1.84 1978 4.60 3.01 3.33 3.23 1.70 .....1979 4.84 3.90 4.01 3.73 2.54 1980 3.72 2.98 3.27 2.74 1981 4.41 3.98 2.82 2.25 Average 4.48 4.30 4.18 3.10 1.88 ~1'JIBl! '-,-----------'--------------------........_----_.-,------ ""~ Table 12 ~~COMPARISON OF MONTHLY TEMPERATURES ( 0 F) .....Month Watana1/McKinley park..£! Hay 41 41 ra~June 48 52 July 51 54 August 43 50 f$IIlDI September 40 41 "'... ,.... Based on the data collected by R&M (Susitna Hydroelectric Project,Processed Climatological data,April 1980 through September 1982,volume 5,Watana Stations,two volumes)for the years 1981,82 and 83. For the"period 1951-75,taken from NOAA Climatography of the united States No.60,Climate of Alaska. 11 Table 13 "'..NET RESERVOIR EVAPORATION WATANA RESERVOIR Average Pan Lake Average Month Evaporation EV<.1poration Precipitation (in)(in)(in) Jan 0 0 1.20 Feb 0 0 1.20 Mar 0 0 1.20 Apr 0 0 0.60 May 3.67 2.67 1.50 Jun 3.53 2.47 4.80 Jul 3.43 2.40 6.30 Aug 2.54 1.78 4.80 Sep 1.54 1.08 2.70 Oct 0 0 1.80 Nov 0 0 1.80 Dec 0 0 2.10 Total 14.71 10.40 30.0 ..... i 1 Table 14 F*D CLIMATOLOGICAL DATA :--lIJ!'Watana Devil Canyon Temper-Precipi-Temper-Precipi- Year Month ature tation ature tation (°C)(mm)(OC)(mm) 1980 May 4.6 14.6-Jun 9.1 55.0 Ju1 11.9 107.6 Aug ~!f<li_Sep Oct 0.2 Nov -7.2 2.0 -5.1 ~~Dec -21.1 0.2 -17.9 1981 Jan -4.5 1.6 -2.5 Feb -7.3 r·1ar -4.3 18.4 -1.8 1"'''Apr -4.3 1.2 -1.8 1.2iMay7.6 44.0 8.7 39.0 Jun 9.3 129.8 10.0 166.4 Ju1 9.3 170.6 9.3 176.6 Aug 2.0 165.6 Sep 4.0 77.2 .....Oct -2.1 25.0 -.4 Nov -10.4 5.6 -8.3 Dec -13.7 7.0 -11.6 1982 Jan -19.6 0.0 -17.0 ,fJ'SIIlIIiIr'Feb Mar -7.1 Apr -4.5 7.2 -2.7 21.0 May 2.3 25.8 4.4 22.0 Jun 8.6 87.4 9.9 85.2 Ju1 10.8 109.2 11.7 106.4 Aug 10.0 58.2 10.8 35.0 .Sep 5.0 100.8 6.0 156.6 ""'" P"" I i I !!DO Table 15 ~MONTHLY PERCENTAGES OF PRECIPITATION ,m~Matanuska r-icKinley Park Percent Percent Month precifitation of Annual Precipitation of Annual ~1II/lII (l.n)(in) Jan 0.79 5 0.68 4 :iJf1I~Feb 0.63 4 0.61 4 Mar 0.52 3 0.60 4 Apr 0.62 4 0.38 2 p-Hay 0.75 5 0.82 5 Jun 1.61 10 2.51 16 Jul 2.40 15 3.25 21 Aug 2.61 18 2.48 16 Sep 2.31 15 1.43 9 Oct 1.39 9 0.92 6 Nov 0.93 6 0.90 6....Dec 0.93 6 0.96 7 ..... .... ___>__~-~._--"-cw--~---------""""''''''''-'''''''---------------------- 1 J I ~l l J 1 1 J EXHIBIT 1 I STREAM GAGING STATiON WATER YEAR SERIAL USGS DRAINAGE NAME ,~-CIIft~1O ::n;;::n:~i -C\lfti lO !III~-~ft""l0 CO~COCJ)101010 10 COlD CD ,...~,...,... NO.NO.AREA CJ)CJ)GtCD CD CD CD CDCJ)CltGt CD CD CD CD CD CJ)CDCD t;CIt t;fi)-ti QlQICJ)QI-.....p ...................................................................... ....2. 1.15291000 SUSITNA RIVER -. 850 NR.DENAU 2.15291200 280 MACLAREN RIVER NR.PAXSON '3.15291500 4.140 SUSlTNA RIVER AT CANTWELL 4.15292000 8.180 SUSITNA RIVER AT GOLD CREEK 5.15292400 2.570 CJU.ITNA RIVER NR.TALKEETNA 6.15292700 2.008 TAUCEETNA RIVER NR.TALKEETNA 1.15294300 2.260 SKWENTNA RIVER NR.SKWENTNA 8.15294350 19.400 SUSITNA RIVER • AT SUSITNA ,STATION OBSERVED DATA I I FILLED·IN DATA HARZA-EBASCO susm:\JOINT VENTURE BUSITNA HYDROELECTRIC PROJECT STREAMFLOW DATA USED IN TIME SERIES ANALYSIS o 10 20 30 I I I I MILES LEGENT RIVER ~30-ISOHYET (INCH.) ---WATERSHED DIVIDE EXHIBIT 2 1 \ i I / I \.,'""- 'l \ L) / I l J "t/ 1 '1 ~~.1,_" ........../-... "\ '-....... / I ----\-1 0 \r---f-6 0 .-----,.-50 40 o N J~1I '-'1 i_._i i_1_ N t J1~~~~~~I I_~J_'-~~~-"ll 1.-Jr HARZA-EBASCO SUSITNA JOINT VENTURE SUSITNS HYDROELECTRIC PROJECT MEAN ANNUAL PRECIPIT AnON MAP