Walla Walla District USACE Website
Lower Snake River Juvenile Salmon Migration Feasibility Study
This contains the Final Feasibility Report/Environmental Impact Statement (Final FR/EIS), Executive Summary, and 21 Technical Appendices for the Lower Snake River Juvenile Salmon Migration Feasibility Study. All files are provided in PDF format and can be read using Adobe Acrobat Reader.
The U.S. Army Corps of Engineers spent seven years studying Snake River dam removal. The final environmental impact statement, released in 2002, evaluated four alternatives to help lower Snake River fall chinook get past the dams: 1) the existing condition; 2) maximum transport of juvenile salmon; 3) system improvements that could be accomplished without a drawdown and 4) dam breaching.
The study included engineering work; biological investigations (i.e., effects to salmon and steelhead, resident fish, and wildlife); effects on recreation, cultural resources, and water quality; and socioeconomic effects, including implementation costs, navigation, irrigation, and power. The development of an environmental impact statement and public involvement were also included in the study, both of which are essential to the National Environmental Policy Act process.
LSR Study Menu
- Summary
- Drawdown Regional Economic Workgroup (DREW) Products
- Record of Decision
Final Feasibility Report and Environmental Impact Statement
| SUMMARY | Improving Salmon Passage |
| PART I (FR/EIS) | |
| Front Matter | Abstract, Table of Contents, Acronyms and Abbreviations |
| Executive Summary | Executive Summary |
| Section 1 | Introduction |
| Section 2 | Affected Projects and Programs |
| Section 3 | Plan Formulation |
| Section 4 | Affected Environment |
| PART II (FR/EIS) | |
| Section 5 | Environmental Effects of Alternatives |
| Section 6 | Plan Selection and Implementation |
| Section 7 | Regional Coordination and Public Outreach |
| Section 8 | Compliance with Applicable Federal Environmental Statutes and Regulations |
| Section 9 | Literature Cited |
| Section 10 | Glossary |
| Section 11 | List of Preparers |
| Section 12 | Distribution List |
| Section 13 | Index |
| APPENDICES | |
| Appendix A | Anadromous Fish Modeling |
| Appendix B | Resident Fish |
| Appendix C | Water Quality |
| Appendix D | Natural River Drawdown Engineering |
| Annex A | Turbine Passage Modification Plan |
| Annex B | Dam Embankment Excavation Plan |
| Annex C | Temporary Fish Passage Plan |
| Annex D | River Channelization Plan |
| Annex E | Bridge Pier Protection Plan |
| Annex F | Railroad and Highway Embankment Protection Plan |
| Annex G | Drainage Structures Protection Plan |
| Annex H | Railroad and Roadway Damage Repair Plan |
| Annex I | Lyons Ferry Hatchery Modification Plan |
| Annex J | Habitat Management Units Modification Plan |
| Annex K | Reservoir Revegetation Plan |
| Annex L | Cattle Watering Facilities Management Plan |
| Annex M | Recreation Access Modification Plan |
| Annex N | Cultural Resources Protection Plan |
| Annex O | Irrigation Systems Modification Plan |
| Annex P | Water Well Modification Plan |
| Annex Q | Potlatch Corporation Water Intake Modification Plan |
| Annex R | Other River Structures Modification Plan |
| Annex S | Potlatch Corporation Effluent Diffuser Modification Plan |
| Annex T | PG&E Gas Transmission Main Crossings Modification Plan |
| Annex U | Hydropower Facilities Decommissioning Plan |
| Annex V | Concrete Structures Removal Plan |
| Annex W | Implementation Schedule |
| Annex X | Comprehensive Baseline Cost Estimate |
| Appendix E | Existing Systems and Major System Improvements Engineering |
| Appendix F | Hydrology/Hydraulics and Sedimentation |
| Appendix G | Hydroregulations |
| Appendix H | Fluvial Geomorphology |
| Appendix I | Economics |
| Appendix J | Plan Formulation |
| Appendix K | Real Estate |
| Appendix L | Lower Snake River Mitigation History and Status |
| Appendix M | Fish and Wildlife Coordination Act Report |
| Appendix N | Cultural Resources |
| Appendix O | Public Outreach Program |
| Appendix P | Air Quality |
| Appendix Q | Tribal Consultation and Coordination |
| Appendix R | Historical Perspectives |
| Appendix S | Snake River Maps |
| Annex A | 1934 Survey Drawings: |
| Drawings 1-11 | Sheet Numbers 1 Through 11 |
| Drawings 12-23 | Sheet Numbers 12 Through 23 |
| Drawings 24-35 | Sheet Numbers 24 Through 35 |
| Drawings 36-47 | Sheet Numbers 36 Through 47 |
| Drawings 48-59 | Sheet Numbers 48 Through 59 |
| Drawings 60-71 | Sheet Numbers 60 Through 71 |
| Drawings 72-83 | Sheet Numbers 72 Through 83 |
| Drawings 84-95 | Sheet Numbers 84 Through 95 |
| Drawings 96-107 | Sheet Numbers 96 Through 107 |
| Drawings 108-119 | Sheet Numbers 108 Through 119 |
| Drawings 120-131 | Sheet Numbers 120 Through 131 |
| Annex B | Pre- and Post-Dam Comparison Displays |
| Appendix T | Clean Water Act, Section 404(b)(1) Evaluation |
| Appendix U | Response to Public Comments |
Drawdown Regional Economic Workgroup (DREW) Products
The potential economic effects of actions related to the lower Snake River have been analyzed by numerous entities throughout the region. To reduce conflicting analyses and pool resources for a more efficient effort, the Corps convened the Drawdown Regional Economic Workgroup (DREW). The purpose of DREW is to develop a combined regional economic analysis. Members of DREW include the Corps, Bonneville Power Administration (BPA), Bureau of Reclamation (BoR), National Marine Fisheries Service (NMFS), Northwest Power Planning Council (NPPC), the Columbia River Inter-Tribal Fish Commission (CRITFC), and representatives of other interested groups. The DREW meetings, held in various locations throughout the region, on roughly a bi-monthly basis, were regularly advertised and open to the public. Members of the public and representatives of various interest groups regularly participated in and contributed to these meetings.
Drawdown Regional Economic Workgroup (DREW) Products
Power System Analysis
- Technical Report on Hydropower Costs and Benefits – 31 March 1999 – Final Report – PDF Version
- Power System Analysis – July 1999 – PDF Version
Recreation and Tourism Analysis
- Recreation and Tourism Analysis – April 1999 – PDF Version
- Recreation Use and NED Benefits Technical Chapter – October 1999 – PDF Version
Transportation Analysis
- Technical Report – Transportation – 14 October 1999 – PDF Version
- Technical Exhibit A – Survey of Snake River Grain Facilities – Jack Faucett Associates, Inc. – September 1998 – PDF Version
- Technical Exhibit B – The National and Regional Economic Benefits of Commercial Navigation on the Snake River – The Tennessee Valley Authority and The Center for Business and Economic Research, Lewis College of Business – June 1998 – PDF Version
- A-3 – Methodological Appendix – PDF Version
- Technical Exhibit C – Transportation Study – Implication of Changes in the Columbia-Snake River System Waterway on Grain Logistics from the Traditional Portland Market Gathering Territory – Upper Great Plains Transportation Institute, Fargo, North Dakota – August 1999 – PDF Version
- Technical Exhibit D – Assumptions, Input Values and Example Reebie Modal Cost Estimates for Barge, Rail and Truck Transport – PDF Version
- Technical Exhibit F – The Incremental Cost of Transportation Capacity in Freight Railroading: An Application to the Snake River Basin – The Tennessee Valley Authority and the Center for Business and Economic Research, Lewis College of Business – July 1998 – PDF Version
- Transportation Analysis – October 1999 – PDF Version
Water Supply Analysis
- Water Supply Analysis – November 1999 – PDF Version
Anadromous Fish Economic (Commercial) Analysis
- Economic Impacts and Values for Changed Anadromous Fish Harvests Due to Lower Snake River Hydrosystem Management Actions and the Economic Impacts and Values for Anadromous Fish Harvests from the Columbia River Basin – October 1999 – PDF Version
- Appendix 2.A, Anadromous Fish Size, Price, and Per Unit Economic Assumptions – PDF Version
- Appendix 3.A, Snake River Anadromous Fish Run Size and Harvest Forecasts – PDF Version
- Appendix 4.A, Hatchery Origin and Wild Origin Smolt Production – PDF Version
- Anadromous Fish Economic Analysis – October 1999 – PDF Version
Implementation/Avoided Costs Analysis
- Implementation/Avoided Costs – November 1999 – PDF Version
Passive Use Analysis
- Passive Use Values of Wild Salmon and Free-Flowing Rivers – October 1999 – PDF Version
Tribal Circumstances and Perspectives Analysis
- Tribal Circumstances and Perspectives Analysis of Impacts of the Lower Snake River Project on the Nez Perce, Yakima, Warm Springs, and Shoshone-Bannock Tribes – September 1999 – PDF Version
- Tribal Circumstances and Perspectives Analysis – September 1999 – PDF Version
Regional Economic Analysis
- Regional Analysis – PDF Version
Social Analysis
- Social Analysis Report – June 1999 – PDF Version
- Social Impact Analysis – October 1999 – PDF Version
Risk and Uncertainty Analysis
- Risk and Uncertainty Assessment – December 1999 – PDF Version
Cost Effectiveness Analysis
- Cost Effectiveness – November 1999 – PDF Version
Summary of Effects
- Summary of Effects – December 1999 – PDF Version
Cost Allocation
- Cost Allocation – July 1999 – PDF Version
Financial Analysis
- Financial Analysis – December 1999 – PDF Version
Compensatory Actions
- Compensatory Actions – November 1999 – PDF Version