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Home My WebLink AboutAPA2936StJSITNA JOINT V5NTURE · 711 H STREET ANCHORAGE, ALASKA 99501 TEL. (907) 272 5585 Mr. James B. Dischinger Project Manage!' Alaska.Pcwer Authority 334 West 5th Aveaue Anchorage, Ala~ka 99501 May 15, 1985 1.8.2/6.2.19 CONFIDEJlT!AL: PRIVILEGED WORK PRODUCT FRE?ARED IN ANTICIPATION OF LITlG.'~ TiON; RESTRICTED DISTRISUTION Subject: Susitna Hydroelectric Project FERC License Amendment Outline Pe~r Mr. Dlschinger: We ar-e transmitting herewith for your information and reference a draft of the. outline of the FERC License Amendment. This outline has been assembled from our review of the original application and it lists those paragraphs of the application which we believe must be touched upon in the amendment. This outline is substantially a table of contents of the original appli- cation. It is our intention to·make an entry under each heading, most of which will state something to the eff~ct that, "This rJection of the License Application dated February 15 1 1983 and accepted by FERC on July 29 2 1983 is unchanged by staging the con a true tion of Wa tana Da.~1. as covered by this Amendment." Whe~e a section is changed by staging, it is our plan to insert the change or provide reference to other sections in the amendment where the change can be found. The above approach will be diicusaed in our meetings in Washington, D. Ce next week. pd Enclosure cc w/enc1osure: See page 2. M4250 Very truly yours, Larso Project Director / I I r ~-:·~ ·}~ .. ~.:. _..,~ .. ~.·· . .; ··~~~ .. :~~=·:.; ........ ~;~·,.~:~ .... :~: .... ~~::=-~·-.. ~:: .. ;~<t -~~,. "' ~ • • •I • • • • ·o Mr. J. B."Dischinger May 15, 1985 Page 2. cc w/enclosure: T. J. Arminski, Power Authority R. S. Fleming, Power Authority M4250 C. B. Curtis~ VNFSC~ Washington W. J. Van Ness, VNFSC, Washington Pe A. Bergmann, HE B. J. Casey, HE C. D. Craddock, HE W. M. Dyok, HE R. L. Fairbanks, HE E. G. Gemperline, HE L. G. Gilbertson, HE N. M. Hernandez, Chicago G. N. Hizey, HE P. T. Lambert, HE W. H. Pettigrew, HE J. P. Robinson, HE J. H. Thrall, HE G. V. Volland, Chicago l t .. ' ~ ;, t i ! SUSITNA HY~iDEL!CTRIC PROJECT STA6ED CONSTRUCTION L~CENSE AMENDMEN! TRANSMITTAL LETTER ·~ REVISIONS TO EXHIBIT A PROJECT DESCRIPTION TABLE OF CONTENTS 1 -PROJECT STRUCTURES -WATANA DEVELOPMENT 1. 1 Genera.l Arrangement 1. 2 ~1ain Dam 1.3 Diversion 1.4 Emergency Release Facilities 1.5 Outlet Facilities 1.6 Main Spillway 1.7 Emergency Spillway 1.8 Power Intake 1.9 PenstocKs 1.10 Powerhouse 1.11 Tailrace 1.12 Access Plan 1.13 Site Facilities 1.14 Relict Channel 2 -RESERVOIR DATA -WATANA 3 -TURBINES AND GENERATORS -WATANA 3.1 Unit Capacity 3.2 Turbines 3.3 Generators 3.4 Governor System 4 -TRANSMISSION FACILITIES FOR WATANA DEVELOPMENT 4.1 Transmission Requirements 4.2 Description of Facilities 4.3 Construction Staging 5 -APPURTENANT MECP~NICAL AND ELECTRICAL EQUIPMENT -· WATANA 30492 850513 5.1 Miscellaneous Mechanical Equipment 5.2 Acce~sory Electrical Equipment 5.3 Switchyard Structures and Equipment 1 __ , . . ~ai!l:tre· · r ':s · · •• rrr.-..... ~~ \ i Fi lJ 6 ;.. LANDS OF THE UNITED .S'r.A,TES ·1 -PROJECT STRUCTURES -DEVIL CANYON DEVELOPMENT 7.1 General Arrange'Clent 7.2 Arch Dam 7. 3 Saddle .Dam 7.4 Diversion 7.5 Outlet Facilities 7.6 Main Spillway 7.7 Emergency Spillway 7.8 Devil Canyon Power. Facilitie$ 7.9 Penstocks 7.10 Powerhouse and Related Structures 7.11 Tailrace Tunnel 7.12 Access Roads 7.13 Site Facilities 8 -DEVIL CANYON RESERVOIR 9 -TURBINES AND GENERATORS -DEVIL CANYON 9.1 Unit Capacity 9.2 Turbines 9.3 Generators 9.4 Governor System 10 -TRANSMISSION LINES -DEVIL CANYON 11 APPURTENANT EQUIPMENT ~ . ~7IL CANYON 11.1 Miscellaneous h,;~cl'·:,dcal Equipment 11.2 Accessory Electri·:~l Equipment 11.3 Switchyard otructures and Equipment REFERENCES LIST OF TABLES REVISIONS TO EXHIBIT B STATEMENT OF PROJECT OPERATION AND RESOURCE UTILIZATION TABLE OF CONTENTS 1 -DAMSITE SELECTION 30492 850513 1.1 Previous Studies 1.2 Plan Formulation and Selection Methodology 1.3 Damsite Selection 1.4 Formulation of Susitna Basin Development Plans 1.5 Evaluation of Basin Development Plans 1.6 Preferred Susitna Basin Development Plan 2 _,t'ttilfffdri tf'&ett-& **' t t' ttr·r,.·w~ ... .,. l __] 2 -ALTERNATIVE FACILITY DESlGN, PROCESSES AND OPERATIONS 2.1 Susit.na Hydrqe~.~ctric Development 2 .. 2 Watana Proje.ct Fortp.tdation 2. 3 Select ion of Wa~ati;_,.;~ General Arr.angment 2.4 Devil Canyon Project Formulation 2.5 Selection of Devil Canyon General Arrangement 2. 6 Select ion of Access. Road Corridor 2.7 Selection of Transmission Facilities ~.8 Selection of Project Operation 3 -J)ESCRIPTION OF PROJECT OPERATION 3.1 Operation within Railbelt Power System 3.2 Plant and System Operation Requirements 3.3 General Power Plant and System Railbelt Criteria 3.4 Economic Dispat~h of Units 3.5 Unit Operation Reliability Criteria 3.6 Dispatch Control Centers 3.7 Susitna Project Operation 4 DEPENDABLE CAPACITY AND ENERGY PRODUCTION 4.1 Hydrolo~y 4.2 Reservoir Dat . .a 4.3 Operating Capabilities of Susitna Units 4.4 Tail water Rating Curve 5 -STATEMENT OF POWER NEEDS AND UTILIZATION 30492 850513 5.1 Introduction · 5.2 Description of the Railbelt Electric Syst~~s a. The Interconnected Railbe:lt Market i. The Electric Utilities and Other Suppliers ll. The Existing Electric Supply Situation b. Railbelt Electric Utilities i. Utility Load Characteristics 11. Electricity Rates 111. Conservation and Rate Structure Program c. Historical Data for the Market Area 5.3 Forecasting Methodology a. The Effect of World Oil Prices on the Need for Power b. Forecasting Models i. Model Overview c. ii. Petrolem Revenue Forecasting (PETREV) Model iii. Man-in-the-Arctic Program (~~) Economic Modei iv. Railbelt Electric Demand (RED) Model v. Optimized Generation Planning (OGP) Model Model Validation · i. MAP Model Validation ii. RED Model Validation 3 l L ;:. r ~; j I t 1 ,· ,. r , ! . \ -· S ... 4 Forecast of Electric Power Demand 4· Oil Price Forecasts i. Alaska Department of Revenue (DOR) ii. Data Resources Incorporated (DRI) iiio Sherman Clark Associates (SHCA) iv. Other Projections b.. Selection of Referenc;_e and Other Cases c. Variables and AssumpC ~.ons Other than Oil Prices i. PETREV Model ii. MAP Model iii. RED Model iv. OGP Model d. Reference Case Forecast i. State Petroleum Revenues ii. Fiscal and Economic Conditions ~1~. Electric Energy Demand e. Other Forecasts f. Sensitivity Analysis i. MAP Model Sensitivity Tests ii. RED Model Sensitivity Tests 'iii. OGP Model Sensitivity Tests g. Reasonableness of the RED Forecasts h. Comparison with Previous Forecasts i. Impact of Oil Prices on Forecasts 5.5 -Project Utilization 6 -FUTURE SUSITNA BASIN DEVELOPMENT REFERENCES LIST OF TABLES LIST OF FIGURES REVISIONS TO EXHIBIT C PROPOSED CONSTRUCTION SCHEDULE TABLE OF CONTENTS 1 -WATANA SCHEDULE 1.1 1.2 - 1.3 Access Site Facilities Diversion Main Dam 1 o4 1.5 1.6 1.7 1.8 - Spillway, and Intakes 30492 850513 Powerhouse and Other Underground Transmission Lines/Switchyards General 4 ----·--- Works __ .] I I I ! l L ,, l r I r I l t r l 2 - :. ·- \) DEVIL CANYON SCHEDULE 2.1 - 2.2 - 2.3 - 2.4 - 2.5 - 2.6 ... 2.i- 2.8 - Access Site Facilities Diversion Arch Dam Spillways and Intake Powerho1Jse and Other Underground Works Transmission Line~/Switchyards General 3 -HISTORY OF EXIST:.::G PROJECT LIST OF FIGURES REVISIONS TO EXHIBIT D PROJECT COSTS AND FINANCING TABLE OF CONTENTS 1 -ESTIMATES OF COST 1.1 Construction Costs 1.2 Mitigation Costs 1.3 Engine0.ring and Administration Costs 1.4 Operation, Maintenance and Replacement Costs 1.5 Allo~ance for Funds Used During Construction 1.5 Escwiation 1.7 Cash Flow and Manpower Loading Requirements 1.8 Contingency lu9 Previously Constructed Project Facilities 1.10 EBASCO Check Estimate 2 -ESTIMATED ANNUAL PROJECT COSTS 3 -MARKET 3.1 3.2 3.3 3.4 3.5 3.6 VALUE OF PROJECT PO'i-7ER Th~ Railbelt Power System Regional Electric Power Demand and Supply Market and Price for Watana Output in 1994 Market and Price for Watana Output in 1995-2001 Harket and Price for Watana and Devil Canyon Output in 2003 Potential Impact of State Appropriations 4 -EVALUATION OF ALTERNATIVE ENERGY PLANS 4.1 General 4.2 Existing System Characteristics 4.3 Fairbanks -Anchorage Intertie 4.4 Hydroelectric Alternatives 4~5 Thermal Options -Development Section 4~6 Without Susitna Plan 4.7 Economic Evaluation 4.8 Sensitivity to World Oil Price Forecasts 4.9 Other Sensitivity Assessments 30492 5 850513 __ ," I l ! i l r ! [ I l' t L I 1 () 4.10 8att~lle R.ailbelt Alternatives Study S -CONSEQUENCES OF LICENSE DENIAL 5·.1 Coat of License Denial 5.2 Future Use of Damaites if License is Denied , , 6 -FINANCING 6 .• 1 -Forecast Financial Parameters 6.2 -Inflationary Financing Deficit 6.3 -Legislative Status of Alaska Power Authority. .and Susitna Project 6.4 -Financing Plan LIST OF TABLES LIST OF FIGURES REFERENCES v APPENDIX D-1 FUELS PRICING STUDIES FUELS PRICING STUDIES TABLE OF CONTENTS 1 -NATURAL GAS 2 - 1.1 ~ Resources and Reserves 1.2 Production and Use 1.3 -Current Prices 1.4 -Projected Gas Prices 1.5 -Effect of Gas Price Deregulation 1.6 -References and Notes COAL 2.1 - 2.2 - 2:3 - 2.4 - 2 .. 5 - Resources and Reserves Present and Potential Alaskan Coal Production Current Alaskan Coal Prices Coal Price Escalation References and Bibliography 3 -DISTILLATE OIL 3.1 Availability 3.2 Price LIST OF TA.BLES LIST OF FIGURES REVISIONS TO EXHIBIT E GENERAL DESCRIPTION OF THE LOCALE TABLE OF CONTEN1S 30492 850513 6 _ _.._,-, - 1 -GEQRAL DESCRIPTION OF nu: LOCALE ·1411 1.2 General Suaitna 1.2.1 1.2.2 1.2.l 1.2.4 1.2.5 1.2.6 1.2 .. 7 1.2.8 1.2 .. 9 Set-ting Basin Physiography and Topography Geoloay and Soils Hydrology Climate Vegetation Wildlife Fish Land Use Recreation GLOSSARY LIST OF FIGURES WATER USE AND QUALITY 1 -INTRODUCTION 2 30492 850513 BASELINE DESCRIPTION 2.1 Susi~na River Morphology 2 .. 1.1 Mainstem 2.1.2 Sloughs 2.2 Susitna River Water Quantity 2.2.1 Mean Monthly and Annual Flows 2.2.2 Floods 2.2.3 Flow Variability 2.2.4 Water Levels 2.3 Susitna River Water Quality 2.3.1 Water Temperature 2.3.2 Ice 2.3.3 Bedload and Suspended Sediments 253.4 Turbidity 2.3.5 Vertical Illumination 2.3.6 Dissolved Gases 2.3.7 Nutrients 2.3.8 Other Parameters 2.3.9 Water Quality Summary 2.4 Baseline Ground Water Conditions 2.4.1 Description of Water Table and Artesian Conditions 2.4.2 Hydraulic Connection of Ground Water and Surface Water . 2.4.3 Location~ of Springs~ Wellst and Artesian Flows 2.4.4 Hydraulic Connection of Mainstem and Sloughs 2.5 Existing Lakes, Reservoirs, and Streams 2.5.1 Lakes and Reservoirs 2c5.2 Streams 2.6 Existing Instream Flow Uses 2.6.1 Downstre&m Water Rights 2. 6. 2 Fisher·y Resources 2.6.3 Navigation and Transportation 7 - .,2.6.4 ,2.c6e:S 2.6.6 2.6.7 Access 2.7.1 Recreation 1tiperian Vegetation and Wildlife Habit~At Waate A.laiutilative Capacity Freahwater aecruitment to Cook Inlet Estuary Plan Flova 2.1~2 W&ter Quality 2.8 Transmission Corridor 2.8.1 Flows 2.8.~ Water Quality 3 -PROJECT OPERATION AND FLOW SELECTION 4 - 5 6 30492 850513 3.1 Project Reservoirs 3.1.1 Watana Reservoir Characteristics 3~1.2 Devil Canyon Reservoir Characteristics 3.2 Simulation Maael and Selection Process 3.3 Pre-project Flows 3.4 Project Flows 3.4.1 Range of Flows 3 .4. 2 Timing of Flow Relea1ses 3.5 Energy Production and Net Benefits 3.6 Fishery and IAstrg~~ Flaw Impacts on Flow Selection 3.6.1 Suaitna River Fishery Impacts 3.6.2 Tributary Fishery Impacts 3.6.3 Other Instream Flow Considerations 3.7 Operational Flow Scenario Selection 3.8 Maximum Drawdown Selection PROJECT IMPACT ON WATER QUALITY AND QUANTITY 4.1 Watana Development 4.1.1 Watana Construction 4.1.2 Impoundment of Watana Reservoir 4.1.3 Watana Operation 4.2 Devil Canyon Development 4.2.1 Watana Operation/Devil Canyon Construction 4.2.2 Watana Operation/Devil CanyQn Impgyp~ment 4.2ol Watana/Devil Canyon Operatign 4.3 Accesa Plan 4.3ol FloYa 4.3~2 w~ter Quality 4.4 Tranamissiua Co~ridor AGENG¥ GONCE~~S AND RECOMME~DATIONS MITIGATION, EN~CEMENT, AND PROTECTIVE MEASURES 6.1 Introduction 6.2 Mitigation -Construction 6.2.1 Borrow Areas &e~.~ Contamination by Petroleum Products 6.2.3 Concrete Contamination 6~2~4 Support Facilities 6.2.5 Others 6.3 Mitigation -W4tana Impoundment 6.4 Miti1tation -Watan.tl Operation 8 -- l f l I I l t I 1 1 r \ I l l l ! ! 6.4.1 Flowe :::, 6.4.2 River Morpbology 6.4.3 Temperature 6.4.4 Total Dissolved Gas Concentration 6.5 Mitigation -Devil Canyon Construction 6.6 Mitigation -Devil Canyon Impoundment 6.7 Mitigation-nevil Canyon/Watana Operation 6.7.1 Flows 6.7.2 Temperat:ul!:'e 6.7.3 Total Disaolved Ga.9 Concentration 6.8 Mitigation -Access Road and Transmission Lines REFERENCES ~tOSSARY LIST OF TABLES LIST OF FIGURES LIST OF PHOTOGRAPHS APPENDIX E.2.A -Relationship Between Main Chann~l Flow and Slough Physical Habitat Variables FISH WILDLIFE AND BOTANICAL RESOURCES FISH 1 -INTRODUCTION 1.1 Baseline Description 1.2 Impact Assessments 1.3 Mitigation Plans 2 -FISH RESOURCES OF THE SUSITNA RIVER DRAINAGE 2.1 Overview of the Resources 2.1.1 Description of the Study Area for Fish Resources 2.1.2 Data Collection and Analysis Methods 2.1.3 Threatened and Endangered Species 2.lo4 Overview of Important Species 2.1.5 ContributiL" of Commercial and Non-Commercial Fishery 2¥2 Species Biology and Habitat Utilization in the Susitna Dr:.inage 2.2.1 Species Biology 2.2.2 Habitat Utilization 2o2.3 Streams of Access Road Corridor 2.2.4 Streams of the Transmission 2.3 Anticipated Impacts to Aquatic Habitat 2.3.1 Anticipated Impacts to Aquatic Habitat Associated with Watana Dam 2.3.2 Anticipated Impacts to Aquatic Habitat Associated with Devil Canyon 30492 9 850513 0 2.4 2.5 2.6 2.7 2.8 I '1 P"j Jjt <c:.Jf r7. ( u \\ t;, .:::::::_, c 2.,3~"3 ll~pact• Aaaociat:t!d with Accea• £toads, Site Roads a:a.d Railroads 2.3.4 !:!llp&cta Associat~d with Access Roa.de, Site Roads and Railroads Mitiaation Issues and Mitigation Measures 2.4.1 Approach to Mi~igation 2 .4. 2 S!election of P·roject Evaluation Speciee 2.4.3 Mitigation of Construction Impa:ts Upon Fish and A•tu•tic I!ahittits 2.4.4 Mitigation of Filling aud Operation Impacts 2.4.5 Cumulative Effectiveness c,f Mitigation Aquatic St:udies ProgrlAII 2.S.l Preconstructiott Phase 2.;.2 Construction Phase 2.5.3 Filling and Operation Ph3se Monitoring Studies 2.6.1 Construction Monitoring 2.6.2 Operational Monitoring Cost of Mitigation Agency Consultation an Fisheries Mitigation Measures 2.8.1 U.Su Pish and Wildlife Servic~ 2.8.2 Alaa~a D~partment of Fish and Game WILDLIFE AND BJTANICAL RESOURCES 3 .. 4 - 30492 850513 BOTANICAL RESOURCES . 3.1 Introduction 3.1~1 Regional Botanical Setting 3.1.2 Flo~istics 3.!.3 Contribution to Wildlife, Recreation, Subsistence, and Comau!rce 3.2 Baseline De~~ription 3.2.1 Threatened or Endangered Plants 3.2.2 Plant Communities 3.2.3 Wetlands 3.3 lmpacts 3.3.1 Watana Development 3.3.2 Devil C~nyon Development 3.3.3 Access 3.3.4 Transmission Corridors 3.3~5 Impacts to Wetlands 3.3.6 Prioritization of ~pact Issues 3.4 MitigAtion Plan 3.4.1 Introduction 384.2 Option Analysis 3.4.3 Mitigation Summary WILDLIFE 4.1 Introduction 4.1.1 The Vertebrate Fauna 4.1.2 Threatened or Endangered Species 4.1.3 Species Contributing to Recreation, and Commercg 10 Subsistence, l t I l f j ···~ ,, 1' '- 4.2 B1.11eline Description 4.,2.1 Big Game 4.2.2 Furbearera 4.2.3 Birda 4. 2. 4 Non-Game ( Sma 11 ) L'L111ma 1 s 4.3 Impacts 4.3.1 Watana Development 4.3.2 Devil Canyon Development 4.3.3 Access PLo•ada and Railway 4.3.4 Transmission Lines 4.3.5 Impact Summary 4.4 Mitigation Plan 4.4.1 Impact Issues and Option Analysis 4.4.2 Mit.igation Plana and Monitoring Investigations 4.4.3 Coat A1:aalyais and Schedules 4.4.4 Do~umentation of Agency RecommendationB REFERENCES Introduction Fisheries Wildlife and Botanical Resources LIST OF TABLES LIST OF FIGURES Appendix E3A Appendix E3B Appendix E3C Appendix E3D Appendix E3E Appendix E3F Appendix E3G Appendix E3H A~peiidix E3I _Appendix E3J GLOSS!..RY Fish arid Wildlife Mitigation Policy Environmental Guidelinf!~ Memorandum Preliminary Li~t of Plant Species Upper and Middle Susitna River Preliminary List of Plant Species Intertie Area Statuo, Habitat Use and Relative Abundance of Bird Species in the Mi,ile Susitna Basin Status of Relative Abundance of Bird Species in the Lower Suaitna Basin Scientific Names of Mammal Species Methods Uaed to Determine Moose Browse Utilization and Carrying Capacity within the Middle Susitna Basin Explanation and Justification of Artificial Nest Mitigation Personal Communications HISTORIC AND ARCHEOLOGICAL RESOURCES TABLE OF CONTENTS 1 -INTRODUCTION AND SUMMARY 1.1 Program Objectives 1.2 Program Specifics 1.2.1 Archeology 30492 11 850513 - ! \ r 1 l l I· i 2 - 1.2.2 Geo~rcheology BASELINE nESCltiPTION 2.1 The Study !rea 2 .. 1.1 }~~<~·c'heology 2.1.2 Geoarcheology 2.2 Methods -Archeology and History 2.2.1 Application of Data Base 2.2.2 Permits 2.2.3 Literature Review 2.2.4 Cultural Chronology 2.2.5 Research Design and Strategy 2.2.6 Data Collection and Field Procedures 2.3 Methods -Geoarcheology 1980 2.3.1 Literature Review 2.3.~ Geoarcheologic Terrain Unit Mapping 2.3.3 Field Study 2.3.4 Investigation and Dating of Samples 2.3.5 Methods -Geoarcheology 1981 2.4 Known Archeological and Historic Sites in the Project Area. 2.4.1 Introduction 2.4.2 Watana Dam and IMpoundment 2.4.3 Devil Canyon Dam. and Impoundment 2.4.4 Proposed Borrow Sites, Associated Facilities, and Areas Disturbed by Geotechnical Testing 2.4.5 Proposed Access Routes and Associated Borrow Sites 2.4.6 Transmission Corridors 2.4.7 Other Ar~as 2o5 Geoarcheolog~ 2.5ol Introduction 2. 5. 2 Geoarcheologic: T~rrain Unit Mapping 2.5.3 Stratigraphic Framework 2.5.4 Preliminary Glacial-Geomorphologic Mappi~g Gene~al Comments 2.5.5 The la1t Glaciation 2.5.6 Archeological Stratigraphy 2.5.7 Cultural Horizons 2.5.8 Chronology and History 2.5.9 Mammoth/Mastodon Foesil Discovery 2.5.10 Summary of Geologic History 3 -EVALUATiaN OF AND IMPACT ON HISTORIC AND ARCHEOLOGICAL SITES 30492 850513 3.1 Evaluation of Selected Sites Found: Prehistory and History of the Middle Suaitna River Region 3.lol Introduction 3.1.2 Contemporary Sites: 1945 to Present 3.1.3 Trapping Period: 1920-1945 3.1.4 Exploration/Gold Rush: 1897-1920 3.1.5 Athapaskan Tradition: A.D. 1900 -A.D. 500 3.1.6 Choris/Norton Tradition: ca. A.D. 500 -ca. 1500 B.C. 3.1.7 Northern Archaic Tradition: ca. 1500 B.c. Jooo :a.c. 12 (! .. \\ 3.2 J.t.a"-' 3.1.9 3.1.10 Impaet 3.2.1 3.2.2 3.2.3 3.2.4 3.2.5 3,2.6 3.2.7 3.2.8 American ~a.leoarctic t'ra(i:£tion: ca. 3C B.C. - ca. 9000 B,..c. I Early Peri~d: ca. 30,000 B.C. -ca. 2o,cno B.c. S~ary on Historic and Archeological Sites Int;oduc.t ion Significance Watana Dam and Impoundment Devil Canyon Dam and Impoundment Froposed Borrow Sites, Associated FaciLities, and Sitae Disturbed by Geotechnical Testing Proposed Access Routes Proposed Transmission Corridors Other Portions of the Study Area 4 -MITIGATION OF IMPACT 0!1 HISTORIC MID ARCHEOLOGICAL SITHS 4.1 Mitigation Polic.y ~!ld Apprr-•ch 4.1.1 Avoidance 4.1.2 Preservation 4.1.3 Investigation (Data Recovery) 4.2 Mitigation Plan 4.2.1 Details of Plan 4.2.2 Schedule 4. 2 •. 3 Cost 4.2.4 Statement of Sources and Extent of Financing 5 -AGENCY CONSULTATION 5.1 Consultation Methods 5.2 Summary of Contents 5.2.1 Resea~ch Design 5.2.2 Mitigation Plan REFERENCES LIST OF TABLES LIST OF FIGURES APPENDIX E4A -Antiquities Permits Stipulations GLOSSARY SOCIOECONOMIC IMPACTS TABLE OF CONTENTS 1 -INTRODUCTION 2 -BASELINE DESCRIPTION 2.1 Identification of Socioeconomic Impact Areaa 2 .1. 1 Lo::al Impact Area 2.1.2 Regional Impact Area 30492 13 850513 .• 3 - 4 - 30492 850513 ' -,\ ~ ;'Z,. n ,_, 'CJ'' (2 i) \' 2;.cl('l' State ,,-.;, Deac~iption of Employment, Population, O.tb.er Trend• in. the Impact Are• a 2··;2 .• 1. Local 2.2.2 _ legional ~.2 .. 3 State Persona 1 Income and EVALUAl'ION Q!' THE IMPACT OF PROJECT 3,.1 Impact of In-migration of People on Governmental Facilities sud Service!.:!' 3.2 3.3 3.4_ 3.5 3.6 3.7 3.1.1 Introduction 3~1.2 Methodology 3.1.3 Watana Construction Phase 3.1.4 Watana Operation Phase and Devil Canyon Conatruction Phase 3 ... 1.5 Wat&na .and Devil Canyon -Operation Phase. Onsite Manpower Requirements and Payrc·ll, by Yea,r 3.2.1 Manpower Requirements 3o2.2 Seasonality of Manpower Requirements 3o2.-3 Payroll Residency and Movement of Project Construction Personnel 3.3.1 Region 3.3.2 Cantwell Adequacy of Available Housing in Impact A~eaa 3.4.1 Watana -c~:m:3truction Phase 3~4.2 Watana Operation Phase an~ Devil Canyon Construction Phase 3.4.3 Watana and Devil Canyon Operation Phases Dis?lacement and Influences on Res idem:es and Business 3.5.1 Rasidences 3.5.2 Businesses Fiscal Impact Analysis: Evaluatio1.t of Incremental Local Government Expenditures and Revenu~fJ 3.6.1 Watana -Construction Phas~ 3.6.2 Watan:.~ -Operation Ph:a.se and Devil Canyon 3 .. 6.3 Lo~al 3.7.1 3.7.2 3.7.-J Construction Phase Watana and Devil Canyon-Operation Phases and Regional Impacts on Fish and Wildlife User Groups Fish Game Fur bearers MITIGATION 4.1 Introduction 4.2 Background and Approach 4.3 Attitudes Toward Change 4.4 Mitigation Objectives and Measures 4.4.1 Mitigation Measures that will help Avoid Significant Adverse Project-Induced Impacts 4.4. 2 Mitigation of Significant Adverse Inlpacta that Remain in Communities 4~5 Impact Management Program 4.5.1 Developing Impact Information 14 - 1 O?Y 'WM 1 7 1111\tltllllilaliilllS 'Wr n ... -·;:::? ' ' I ' i I i i l l l l t. ' ' _] f! ' 4.S~~2 ~ Providing IMpact aQd Other Informat.ion 4.,.3 Refining and Implementing Mitigation Measures J .:, ..... ~ .... ~'--·-. S -. Ml'J'IGATIOlf MEASUREii RECOMMENDED BY AGENCIES 5~1 Alaaka Department of Natural Resources 5.2 Al5ska Department of Fish and Game 5~3 u.s. Fish and Wildlife Service 5 .. 4 Su11111ary of Aencies' Suggestibna for Further Studies that Relate eo Mitigation REFERENCES LIST OF TABLES LIST OF FIGURES Appendix ESA Appendix ESB Appendix ESC Elaboration on Approach, Assumptions, and Methods Public Facilities and Services Assumptions, Meth·odology, and Rationale for Fiscal Projections Appendix ESD Traffic Volume Assumptions GEOL~ICAL AND AND SOIL RESOURCES TABLE OF CONTENTS 1 -INTRODUCTION 2 - 30492 850513 BASELINE DESCRIPTION 2.1 Regional Geology 2.1.1 Stratigraphy 2.1.2 Tectonic History 2.2 Quatenary Geology 2.3 Mineral Resources 2!4 Seismic Geology 2.4.1 Introduction 2.4.2 Conceptual Approach 2.4.3 Tectonic Model 2.4.4 1980 Approach 2.4.5 1981 Approach 2.4.6 Results of Study 2.4 .. 7 Design Level Earthqu .. .te 2.5 WatP.na Dameite 2.5.1 Int~oduction 2.5.2 Geologic Conditions 2.5.3 Structural Features 2.5.4 2.5.5 2.5.6 2.5.7 2a5s8 Ground Water Conditions Permafroet Conditions Permeabilit:y Relict Channele Bor1"ow Sites 2.6 Devil Canyon Dam;ite 2.6.1 Introduction 15 - . " t : \ ' \ l k r i I 1 l I _j 0 3 - 2.7 0 I] · 2.6.2 Geolosic Condition• 2.6.3 s't~uctur.l Features 2.6.4 Ground Water Conditione 2.6.S Petufroat 2.6.6 Permeabilil;r 2.6.7 Geology Along Proposed Long Tailrace Tunnel 2.6.8 Borrow Sites Reservoir Geology 2.7.1 Watana 2.7.2 Devil Canyon IMPACTS 3.1 Reservoir-Induced Seismicity (RIS) 3.1.1 Introduction 3.1.2 Evaluation of Potential Occurrence 3.2 Seepa~e 3.3 Reservoir Slope Failures 3.3.1 General 3!342 Slope Stability Models for Watana and Devil Canyon Reservoirs 1~3.3 Devil Canyon Slope Stability aud Erosion 3.3.4 WQtana Slope Stability and Erosion 3.4 Permafrost Thaw 3.5 Seismically Induced Failure 3.6 Reservoir Freeboard for Wind Wave 3.7 Development of Borrow Sites and Quarries 4 -MIT!bATION 4.1 Impacts and Hazards 4.2 Reservoir-Induced Seismicity 4.3 Seepage 4.4 Reservoir Slope Failures 4.5 Permafrost Thaw 4.6 Seismically Induced Failure 4.7 Geologic Hazards 4.8 5orrow and Quarry Sites GLOSSARY REFEUNCES LIST OF TABLES LIST Oi' FIGURES RECREATIONAL RESOUaCES 1 -INTRODUCTION 1.1 -Purpose 1.2 -Relationships to Other Reports 1.3 -Study Approach and Methodology 30492 850513 1.3el -Approach 1.3.2 -Methodology 16 r I H t I l l I l I I I l t t l l . (\ 0 ' 1.4·,.-Pr,oject Description and Interpretation 1.4~1 -Construction 1.4~2~ Operational Characteristics of the Project 1.5 -!mplicationa o.f Project Design and Operation on Recreational Planning 2 -DESCRIPTION OF EX.ISTING AND FUTURE RECREA.'!ION WITHOUT THE SUSITNA PROJECT 2.1 -Statewide Setting 2.1~1 ~ Background 2.1.2 -Regional Setting 2.1.3 -Existing Facilities 2.1.4 -Existing Regional Recreational Use 2.1.5 -Recreational Trends 2.1.6 Future Facilities 2.2 -Suritna River Basin 2.2.1 -Background 2.2.2 -Existing Facilities and Activities 2.2.3 -Future Activities and Facilities 3 -PROJECT IMPACTS ON EXISTING RECF~ATION 3.1 -Direct 1DpactJ of Project Features 3.1.1 -Watana Development 3.ls2 -Devil Canyon Development 3.1.3 -Watana Access Road 3.1.4 -Devil Canyon Access Road 3.1o5 -Gold Creek-Devil Canyon Railroad 3.1.6 Project Area Transmission Line Corridors 3.1.7-Intertie and Stub Transmission Line Corridors 3.2 -Indirect Impacts -Project-Induced Recreational Demand 3.2.1 -Background 3.2.2 -Assumptions 3.2.3 -Estimated Recreational Demand . 4 -FACTORS INFLUENCING THE RECREATION PLAN 5 - 30492 850513 4 • .t - 4.2 - 4.3 - Management Objectives 4.1.1 -Alaska Power Authority 4.1.2 ~ ~laaka Division of Parks 4.1.3 · A.laak.a Department of Fish and Game 4.1.4 -U.S. Bureau of Land Mangement 4.1.5 -Cook Inlet Region, Inc~ (CIRI) and Village Corporations 4.1.6 -Matanuska-Susitna Borough 4.1.7-Alaaka Department of Trausportation Facilities Design Standards Financial Obligation and Responsibility of the Alaska Power Authority RECREATION PLAN 5.1 -Recreation Concept 5.1.1 -The Concept 5.1.2 -Public Input r ( 17 5.2 -Recreation Opportunity-Inv~ntory 5.2.1 -Methodology 5.2.2 • Inventory 5.3 -Recreation Opportunity Evaluation S. 3.1 -Natural Value 5.3.2 -Inherent Durability 5.3.3 -Visual Quality 5.3.4 -Carrying Capacity 5.4 -The Recreatioc Plan ).4.1 -Phase One: Watana Construction Phase 5.4.2 Phase Two: Watana Implementation 5.4.3 -Phase Three: Devil Canyon Construction 5.4.4 -Phase Four: Devil Canyon Operation 5.4.5 -Phase Five: To Be Developed Only If Demand Requires 5.4.6 -Reereation Plan for Conatruction Campa and Permanent Townsite 5.4.7-Site-Specific Design 5.4.8 -Design Standards 5.4.9 -Recreation Plan Mitigation Measures 5.5 -Alternative Recreation Plans 5.5 •. 1 -Additional Facilities and Development 5o5.2 -No Recreation Facility Demand 5.5.3 -Other Access Route Alternative 5.5.4 -Future Additions 6 -PLAN IMPLE~~NT!ON 6.1 -Phasing 6.1.1 = Phase One~ Watana Construction Phaae 6.1.2 -Phase Two: Watana Implementation Phase 6 .1 • 3 ·• Phase Three: De vi 1 Canyon 6.1.4-Phase Four: Devil Canyon Implement Phase 6.1.5 -Phase Five: Postconstruction Monitoring Phase 6.1.6 -Elements of the Recreation Plan According to Their Phase of Development 6.2 -Monitoring and Future Additions 6.2.1 -Proposed Monitoring Phase 7 -COSTS FOil CONSTR.U1.1T!ON AND OPERATIQN OF THE PROPOSED FACILITIES 7.1 -General 1.2 -Conatruction 7.3 -Operations and Maintenance 8 -AGENCY COORDINATION 8.1 -Agencies and Persons Consulted 8.2 -Agency Comments REF.ERENCES LIST OF TABLES 30492 850513 1(.2 .&:0 ---- (I 0 LIST Or FIGUI!S 0 LIST or PHO!OGIAPHS G Appendix E7A -Further Data on Regional Recreational Fac:ilitiea Appendix E7B -Attractive Features -Inventory Data Forms Appendix E7C -Supporting Data for Suaitna Drainage Fishing Activity GLOSSARY AESTHETIC RESOURCES 1 -INTRODUCTION 1.1 -Purpose 1.2 -Relationship to Other Reports 1.3 -Environmental Setting 1.3.1 -Regional Setting 1.3.2 -Susitna River Basin 1.3.3 -Summary 2 -METHODOLOGY 2.1 -Procedure 2.1.1 -Step i -Study Objectives 2.1.2-Step 2-Project Facilities and Features 2.1.3 -Step 3 -Landscape Character Types 2.1.4-Step 4 -Views 2.1 5 -Step 5 -Aesthetic Value Rating 2.1.6-Step 6-Absorption Capability 2.1.7-Step 7-Composite Rating 2.1.8-Step 8-Facilities' Rating 2.1.9 -Step 9 -Mitigation Measures 3 STUDY OBJECTIVES -(STEP 1) 4 -PROJECT FACILITIES AND FEATURES (STEP 2) 4.1 -Watana Project Ares 5 - 30492 850513 4.2 -Devil Canyon Project Area 4.3 -Watana Access Road 4.4 -Devil Canyon Access Road 4.5 -Transmission Line Stubs 4.6 -Intertie 4.7-Recreation Facilities and Features EXISTING LANDSCAPE 5el -Landscape Character Types (Step 3) 5.2 -!~~eptional Natural Features 5.2.1 -Devil Canyon Rapids 5.2.2 -Devil Creek Falls 5.2.3 -Stephan Lake 19 .., •.. ······--·-·--····-· --.. -··-~·----'' ~ ; ' ' 'J' ~ ;1 i ~ ·- I [ _j \) i-;.' -s.2.4 ... Tausena Creek Falls S~2.5 -TauseQa Butte Lake 5.2!!6 -Deadman Creek Falls 5.2.7 -,Fog Lakes 5.2.8. -Big and Deadman Lakes 5.2.9 -Caribou Pass 5.2.10-Vee Canyon 6 -VIEWS (STEP 4) 7 -AESTHETIC VALUE RATING AND ABSORPTION CAPABILITY RATING 7.1 =Aesthetic Value Rating (Step 5) 7.1.1 -Distinctiveness 7.1.2 -Uniqueness 7.1.3 -Harmony and Balance 7.2 -Absorption Capability (Step 6) 7.3 -Composite Ratings (Step 7) 8 -AESTHETIC IMPACT RATING (STEP 8) 8.~ -Mitigation Planning for Incompatible Aesthetic Impacts 9 -MITIGATION (STEP 9) 9.1 -Proposed Mitigatio~ Measures 9.1.1 -Additional Study 9.1.2 -Besc Development Practices 9.1.3 -Creative .Engineering Design 9.1.4 -Use of Form, Line, Color, or Textures 9.ia5 -Mitigation Costs 10 -AESTHETIC IMPACT EVALUATION OF THE INTERTIE 10.1 -Backgraund 30492 850513 10.2 -Project Description !0.3 -Land~cape Character Types 10.3.1 -Susitna River Lowlands 10.3.2 -Talkeetna Mountains 10.3.3 -Lowlands Portion 10.3.4 -Uplands Portion 10.3.5 -Chulitna River 10.3.6 -Broad Pass 10.3.7-Alaska Range 10.3.8 -Nenana Uplands 10.3.9 -Yanert River Valley 10.4 -Description of the Preferred Route 10.5 -Alternatives 10.6 -Impacts 10.6.1 -Susitna River Lowlands 10.6.2 -Talkeetna Mountains 10.6.3 -Alaska Range 10.6.4 -Chulitna River 10.6.5 -Broad Pass 10.6.6 -Yanert River Valley 10.6.7-Nenana Uplands 20 I l . l 1 f 1 I l ) I. l ! l I \ t f ! i I c D 11 ... AGENCY COOIDlNATIOK' 11.1 -Aaencies and Persona Consulted 11.2 -Aaeucy Comment• R.f~F!R!NC!S l,IST OF FIGURES LIST OF PHOTOGRAPHS Appendix E8A -Proposed Facilities Design Analysis Appendix ESB -Site Photos with Simulations of Project Facilities Appendix ESC -Photos of Proposed Project Facilities Sites Appendix EeD -Examples of Existing Aesthetic Impacts Appendix ESE -Examples of Reservoir Edge Conditions Similar to Those Anticipated at Watana & Devil Canyon Dam Appendix ESF -Project Features Impf!cts and Charts Appendix E8G -Illustrations of Possible Mitigation Measures LAND USE 1 -INTRODUCTION 1.1 -Purpose and Approach 1.101 -Objectives 1.1.2 -General Discussion of Land Use Evaluation Procedures 1.2 -Summary of Current Land Status Issues in the Project Area 1.3 Summary of Land Use in the Project Area 1.3.1 -Historical Land Use 1.3.2 -Existing Land Use 1.4 -Summary of Laud use Management Planning in the Project Area 1.5 -Sum.ary of Major Anticipated Land Use Changes 1.5.1 -Land Status 1.5.2 -Land Use Activity 1.5.3 -Land Use Development 2 -DESCRIPTION ON EXISTI~G LAND USE 30492 850513 2.1 -Description of Existing Land Status in the Project Area 2.2 -Description of Existing Land Use in the Project Area 2.2.1 -Description of Land Use Evaluation Procedures 2o2.2 -Existing Land Use Activity 2.2.3 -Existing T,and Use Development 2.2.4 -Special Landa 21 () + I) '1. 2. 3 -Deacription of Existing Land Use Ma(.\'·geaaent Plana for the. Project Area 3 -DESCRIPTION OP LAND USE CHANGES 3.1 -Daaa and Impoundment Areas 3.1.1 -Propoaed Facilities 3.1.2 -Induced Land Use Changes 3.1.3 -Mitigation 3.2 -ConstrtJction Camps and Villages 3.2.1 -Proposed Facilities 3.2.2 -Induced Land Use Changes 3.2.3 -Mitigation 3.3 -Recreation . 3.3.1 -Propoaed Facilities 3.3.2 -Induced Land Use Changes 3.3.3 -Mitigation 3.4 -Access 3.4.1 -Proposed Facilities 3.4.2 -Induced Land Use Changes 3e4.3 -Mitigation 3.5 -Transmission 3.5.1 -Proposed Facilities 3.5.2 -Induced Land Use Changes 3.5.3 -Mitigation 3.6 -Changes in Land Use Without the Project 4 -DESCRIPTION OF CHANGES IN LAND STATUS AND MANAGEMENT 4.1 -Land Status Changes Resulting from the Project 4.2 -Land Status Changes Without the Project 4.3 -Land Management Changes Resulting from the Project 4.4 -Land Management Changes Without the Project 5 -AGENCY CONSULTATION AND MITIGATION PLANS 6 -AUTHORITIES CONTACTED REFERENCES LIST OF TABLES LIST OF FIGURES 30492 850513 22 ' ' ' I l ! l ! l \ I I ~ ( _] :.::' 1 -ALT!RN&TlV! llYDRQELECTRlC SITES 1.1-Non-Suaitna Hydroelectric Alternatives 1.1.1 -S~reening of Candidate Sites 1.1.2 -Ba1is of Evaluation 1.1. 3 -Rank Weighting and S·eoring 1.1.4 -Evaluation Results 1.1.5 -Plan Formulation and Evaluation 1.2 -Environmental Assessment of Selected Alternative Sites 1.2.1 -Descriptio~ of Chakachamna Site 1.2.2 -Description of Snow Site le2.3 -Description of Keetna Site 1.2.4 -Environmental Impacts of Selected Alternatives 1. 3 -Middle Susitna Basin Hydroelectri1: Alternai~ives 1 • 3 .. 1 -Damaite Selectio·n 1.3.2 -Site Screetting 1.3.3 -Formulation of Susitna Basin Development Plana 1.3.4 ~ Plan Evaluation Process 1.3.5 -Comparison of Plana 1.3.6 -Results of Evalu4tion Process 1.3.7-Devil Canyon Dam Versus Tunnel 1.3.8 -Watana-Devil Canyon Versus High ~evil Canyon-Vee 1-3.9 -Preferred Susitna Basin Development Plan 2 -ALTERNATIVE FACILITY DESIGNS 30492 850513 2.1 -Watana Facility Design Alternatives 2.1.1 -Diversion/Emergency Release Facilities 2.1.2.--Main Spillway 2.1~3 -Power Intake and Water Passmges 2.1.4 • Outlet Facilities 2.2 -Devil Canyon Facility Design Alternatives 2.2.1 -Installed Capacity 2.2.2 -Spillway Capacity 2.2.3 -Power Intahe and Water Passages 2.3 -Acceaa Alternatives 2.3.1 -Objectives 2.3.2 Corridor Identification and Selection 2.3.3 -Development of Plans 2.3.4 -Evaluation of Plans 2.3.5 -Deecription of M9Bt Responsive Access Plans 2e3.6 -Comparison of Selected Alternative Plans 2.3.7-Summary of Final Selection of Plans 2.3~8 Modifications to Recommended Access Plan 2.4 -TransMission Alternatives 2.4.1 -Corri4Qr Selection Methodology 2.4.2 -Environmental Selection Criteria 2.4.3 -Identification of Corridora 23 - t I ' t ~ ALTIUATIVIS 1 -ALTIIHATIV!. HYDROELECTRIC SITES 1.1' -Non-Suaitna Hydroeiectric Alternatives 1.1.1 -Screening of Candidate Sites 1.1.2 -Baais of Evaluation 1.1.3 -Rank Weighting and Scoring 1.1.4 -.Evaluation Results 1.1.5 -Plan Formulation and Evaluation 1.2 -Environmental Assessment of Selected Alternative Sites 1.2.1 -Description of Chakachamna Site 1.2.2 -Description of Snow Site 1.2.3 -Description of Keetna Site 1.2.4 -Environmental Impacts of Selected Alternatives 1.3 -Middle Suaitna Basin Hydroelectric Alternatives 1.3.1 -Damaite Sele~tion 1.3.2 -Site Screen: 1g 1.3.3 -Formulation of Susitna Basin Development Plana 1.3.4 -Plan Evaluation Proceas 1.3.5 -Comparison of Plana 1.3.6 Results of ~valuation Process 1.3.7-Devil Canyon Dam Versus Tunnel 1Q3.8 -Watana-Devil Canyon Versus High Devil Canyon-Vee 1.3.9 -Preferred Susitua Basin Development Plan 2 -ALTEF.~ATIVE FACILITY DESIGNS 30492 850513 2.1 -Watana Facility Design Alternatives 2.1.1 -Diversion/Emergency Releaae Facilities 2.1.2 -Main Spillway 2.1.3 -Power Intake and Water Passages 2.la4 -Outlet Facilities 2.2 -Devil Canyon Facility Design Alternatives 2.2g1 -Installed Capacity 2.2.2 -Spillway Capacity 2.2.3 -Power Intake and Water Passages 2.3 -Acceaa Alternatives 2o3.1 -Objectives 2.3.2 Corridor Identification and Selection 2~3.3 -Development of Plans 2.3.4 -Evaluation of Plans 2.3.5 -Description of Most Responsive Access Plant 2.3.6 -Comparison of Selected Alternative Plans 2.3.7-SWIIIIlary of Final Selection of Plans 2.3.8 -Modifications to Recommended Access Plan 2.4 -Transmission Altern•tives 2.4.1 -Corridor Selection Methodology 2.4.2 -Environmental Selection Criteria 2.4.3 -Identification of Corridor• 23 t I l I I j ==.1. d 2.5 ~ l If -Environmental Screening Criteria 2.4.4 2.4.5 2.4.6 2.4. 7 2.4.8 2 •. 4.9 2.4.10 2.4.11 Borr.ow 2.5.1 2.5.2 Environment•~! Screening Methodology Scr.eening lea u 1 ts Proposed Corridor Route Selection Methodology EnviroDIIlental Route Selection Criteria Evaluation Following Access Road Decision Conclusions Site Altern~t~vea Watana Borrow Sites Devil Canyon Borrow Sites 3 -ALTERNATIVE OPERATING SCENARIOS 3.1 Project Operation and Plow Selection 3.1.1 S~ulation Model and Selection Process 3.1.2 Pre-project Flowa 3.1.3 Project Flo~ 3.1.4 Energy Production and Net Benefits 3.2 Instream Flow and Fishery Impacts on Flow Selection 3.2.1 Suaitna River Fishery Impacts 3.2.2 Tributary Fishery Impacts 3.3 Other Instream Flow Considerations 3.3al Downstream Water Rights 3.3.2 Navigation and Transportation 3.3.3 Recreation 3.3.4 Riparian Vegetation and Wi~dlife Habitat 3.3.5 Water Quality 3.3.6 Freshwater Recruitment at Cook Inlet 3.4 Operational Flow Scenario Selection 3.5 Maximum Drawdown Selection 4 -ALTERNATIVE ELECTRICAL ENERGY SOURCES 4.1 Coal-Fired Generation Alternatives 30492 850513 4.1.1 Existing Environmental Condition 4.1.2 Environmental Impacts 4.2 Tidal Power Alternative$ 4.2.1 Preferred Tidal Schemes 4.2.2 Environmental Considerations 4.2.3 Effects on Biological Resources 4.2.4 Other Effects 4.2.5 Socioeconomic Assessment 4.2.6 Impact on Adjacent Land Uses 4s2.7 Materials Origin Supply Study 4.2a8 Labor Supply and Limitations 4~2.9 Community Impact 4.2.10 Impacts of a Causeway 4.3 Thermal Alternatives Other than Coal 4. 3.1 Nat,~ral Gas 4 .. 4 4.3.2 Oil 4.3.3 Diesel 4.3.4 Environmental Considerations of Non-coal Thermal Sources Nuclear 4.4.1 4.4.2 Steam Electric Generation Siting and Fuel Requirements Environmental Considerations 24 ---4, i I r i I =:1 I ! 1 l i (l" Q ,. ) ) !! 0 # 4.4.3 Potent1;-&l Application in the Railbelt Regio.n 4.5 BiouoG .i.r' :/ 4 • 5 .1 ,SJ t~rl'g a't:.\d Fue 1 Req ui rem en t s 4.5.2 Environmental Considerations 4.5.3 Poteatial Application in the Railbelt: Region 4.6 Geo_thermal 4.6.1 Siting Requirements 4.6.2 Environmental Impacts 4.6.3 Potential Application in the the Railbelt Region 4.7 Wind 4.7.1 Large Wind Systems 4.7.2 Small Wind Systems 4.8 Solar 4.8.1 4.8.2 4.8.3 Siting Requirements Environmental Considerations Potential Application to the Railbelt Region 5 -ENVIRONMENTAL CONSEQUENCES OF LICENSE DENIAL REFERENCES LIST OF TABLES LIST OF FIGURES GLOSSARY RECORD OF CONSULTATION PROCESS AGENCY CONSULTATION TABLE OF CONTENTS 1 -ORGANIZATION OF CONSULTATION PROGRAM 1.1 Formal Consultation 1.1.1 Regulatory Requirements 1.1.2 Organization 1.1.3 Fish and Wildlife Mitigation Review Group 1.2 Informal Consultation 1.2.1 Suaitna Hydro Steering Committee 1.2.2 Environmental Workshop 2 PHASES OF REVIEW 2.1 Consultation Prior to Preparation of Draft FERC Application 2.1.1 Plan of Study 2.1.2 Data Collection and Project Assessment 2.1.3 Development Selection 2.1.4 Mitigation Planning 2.1.5 Feasibility Assessment 2.lo6 Additional Studies 2.2 Draft License Review LIST OF TABLES 30492 850513 25 LISt Of FIGURES Appendix EllA Appendix !llB Appendix E11C Appendix EllD Appendix EllE Appendix EllF Appendix EllG Appendix EllH Appendix Ell! Appendix EllJ Co!:'reapondence Relating to Organi:ation of Consultation Program CorrespondeGce Relating to Plan of S.tudy Correspondence Relating to Data Collection and Project Assessment Correspondence Relating to Development Selection Correspondence Relating to Mitigation Planning Correspondence Relating to Feasibility As~@Ssment Correspondence Relating to Additional Studies and Project Refinement Comments During November 1982 Workshop Cor~eaponderice Relating to D~aft Review Comments Received from Agencies Concerning the Draft License and the Power Authority's Responae to These Comments REVISIONS TO EXHIBIT F Plate No. Fl F2 F3 F4 F5 F6 F7 F8 F9 FlO Fll Fl2 Fl3 Fl4 FlS F16 Fl7 Fl8 Fl9 F20 F21 F22 F23 F24 F25 F26 F27 F28 F29 F30 F31 F32 30492 850513 Wat:ana Title ---- Railbelt Area Reservoir Plan Site Layout General Arrangement Main Dam -Plan Main Dam -Section Main Dam -Profile and Detail Main Dam -Grouting and Drainage. Diversion -General Arrangement Diversion -Sections Diversion -Intake Structures Main Spillway -General Arrangement Main Spillway -Control Structure Main Spillway -Chute Sections Main Spillway Flip Bucket Outlet Facilities -General Arrangement Outlet Facilities -Gate Structure &.ergeney Spillway Emergency Release -Sections Downstream Portals -Plan .and Sections Power Facilities -General Arrangement Power Facilities ~ Access Power Facilities -Plan and Sections Power Intake -Sections Pow1!rhouse -Plana Powerhouse -Sections Transformer Gallery -~l~n and Sections Surge Chamber and Tailrace -Sections Electrical Legend Powerhouse -Single Line Diagram Switchyard -Single Line Diagram and Pl~n Access Plan -Proposed Route 26 --- l t 1 ') c. ;. " 9- ,. ,, 0 ~:-. ' P33 F34., F3S P36 P37 Fl8 F39 F40 F41 F42 F43 F44 F45 F46 F47 F48 F49 F50 F51 F52 F53 F54 F55 F56 F57 F58 F59 F60 F61 F62 F63 F64 F65 F66 F67 F68 F69 F70 F71 F72 F73 F74 F75 F16 F77 F78 F79 FSO FSl G -~::- •o Acce•• Plan -Propoaed Route Typical Details General Layout -Site Facilities Gene:ral Layout -Con• truct i-on and Haul Roads Main Conatruct~.on Camp Site Villaae and Town Site Watana an.d Devil Canyon -Construction Camp Details Reaervoir Plan Site Layout General Arranaement Dam• -Plan and Profile Main Dam -Geometry Main Dam -Crown Section Main Dam ~ Sections Main Dam -Thrust Blocks Main Dam -Grouting and Drainage Main Das -Outlet Facilities Saddle Dam -Section Saddle Dam -~£-ofile and Detail Diversion -General Arrangem~nt Diversion ~· Cofferdam Sections Diversion -Sections Main Spillway -General Arrangement Main Spillway -Control Structure Main Spillway -Chute Sections Emergency Spillway -General Arrangement Emergency Spillway -Sections Power Facilities -Gene.ral Arrangement Power Facilities -Access Power Facilities -Plan and Sections Power Intake -Sections Powerhouse -Plans Powerhouse -Sections Tranaformer Gallery -Plan and Sections Surge Chamber and Tailrace -Sections Tailrace Portal -Plan aod Sections Powerhouse -Single Line Diagram Switchyard-Single Line.Diegram and Plan General Layout -Site Facilities General Layout -Construction and Haul Roads Main Construction Camp Siee Temporary Village Railbelt 345kV Single Line Diagram Eater Subatation -Single Line Diagram and Plan Gold Creek -Single Line Diagram and Plan Willow Substation -Single Line Diagram and Plan Knik Arm Su-bstation -Single Line Diagram and Plan University Substation -Single Line Diagram and Plan Typical Transmission Line Structures 345kV System Single Diagram and Transmission Corridot' REVISIONS TO EXHIBIT G 30492 850513 27 - 1 l 1 l J I 1 I I ! I I l I I I ,j I' \. ( ......... -.; ·~ .. J Plate Ko. ----- Gl G2 Gl G4 Title '/"' '·"'iailbelt Map. Index Devil Canyon Map Index Watana Map Index Transmission Line Map Index Access Road Map Index GS G6-Gl2 Gl3-G29 GJO-G52 G53-~59 Devil Canyon Project Boundary Mapa Watana Project Boundary Maps Trana~iasion Line Boundary Maps Access Road Boundary Mapa REVISIONS TO SUPPORTING D£3IGN REPORT (SDR) TABLE OF CONTENTS GENERAL 1 -PROJECT PARAMETERS 2 -PROJECT DESIGN DATA. 2.1 Topographical D.ata 2.2 Hydrological Data 2.3 Meteorological Data 2.4 Reservoir Data 2.5 Tailwater Elevations 2.6 Design Floods 3 -CIVIL DESIGN CRITERIA 3el Governing Codes ~nd Standards 3.2 Design Loads 3.3 Stability 3.4 Material Properties 4 -GEOTECHNICAL DESIGN CRITERIA 4.1 Watana 4.2 Devil Canyon 5 -HYDRAULIC DESIGN CRITERIA 5.1 River Plows ~.2 Design Plows 5.3 Reservoir Levels 5.4 Reservoir Operating Rule 5.5 Reservoir Parameters 5.6 Freeboard 5.7 Criteria 6 -EQUIPMENT DESIGN CODES AND STANDARDS 6.1 Design Codes and Standards 6.2 General Criteria 6.3 Diversion Structures and Emergency 6.4 Main Spillway 6.5 Outlet Facilities 6.6 Power Intake 30492 28 850513 __ , Release Facilities l i ·--···_j·· ___ I ., l'overbouae Tailrace Tunnels ' ' APPEHDa PA APP!HDD: n APPENDIX FC LIST OF TABLES LIST OF FIGURES 30492 850513 Watana Emergency Spillway Watana and Devil Canyon Embankment Stability Analysee. Summary of PMF and Spillway Design Flood Analyses 29 SUSITNA HYDROELECTRIC PROJECT STAGED CONSTRUCTION LICENS!: AMENDMENT REVISIONS TO EXHIBIT ll PLATE NO. TITLE Gl G2 GJ G4 G5 &~ILBELT HAP INDEX DEVIL CANYON MAP INDEX WATANA MAP INDEX TRANSMISSION LINE MAP INDEX ACCESS ROAD MAF INDEX G6 -Gl2 G!J, -G29 DEVIL CANYON PROJECT BOUNDARY MAPS WATANA PROJECT BOUNDARY MAPS · TRANSMISSION LINE BOUNDARY MAPS ACCESS ROAD BOUNDARY MAPS G30 -G52 G53 -G59 REVISIONS TO SUPPORTING DESIGN REPORT (SDR) GENEitAL , 1 -PROJECT PARAMETERS 2 -PROJECT DESIGN DATA 2.1 -Topographical Data 2.2 -Hydrological Data 2.3 -Meteo~ological Data 2.4 -Reservoir Data 2.5 -Tailwatelt' Elevations 2.6 -Design Floods 3 -CIVIL DESIGN CRITERIA 3.1 -Governing Codes and Standards 3.2 -Design Loads 3.3 -Stability 3.4 -Material Properties 4 -GEOTECHNICAJ., DESIGN CRITERIA 4.1 -Watana 4.2 -Devil Canyon 5 -HYDRAULIC DESIGN CRITERIA 5.1 -River Flows 5.2 -Design Flows 5.3 -Reservoir Levels 5.4 -Reservoir Ope1:ating Rule 5.5 -Reservoir Parameters 5.6 -Freeboard 5.7 -Criteria 6 -EQUIPMENT DESIGN CODES AND STANDARDS 6.1 -Design Codes and Standards 6.2 -General Criteria 30492 850513 30 - 6.3 Diveraion Structure• and Emergency Release Facilities 6.4 -!'" Main Spillway 6e.5 -Qutlet Facilitiea 6'. 6 -Power Intake 6.7' . p -o~~rhou:e 6.8 -Tailrace Tunnels APPENDIX FA -Watana Emergency Spillway APPENDIX FB Watana and Devil Canyon EmbAnkment Stability Analyses. APPENDIS FC -SummQry of PMF and Spillway Deaign Flood Analyses List of Tables List of Figures 30492 850513 31 c