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United States of America Federal Energy Regulatory Commission UNITED STATES OF AMERICA FEDERAL ENERGY REGULATORY COMMISSION Public Utility District No.1 of Chelan County Project No. 637-022 - WA NOTICE OF AVAILABILITY OF FINAL ENVIRONMENTAL ASSESSMENT (October 10, 2003) In accordance with the National Environmental Policy Act of 1969 and the Federal Energy Regulatory Commission’s (Commission) regulations, 18 CFR Part 380 (Order No. 486, 52 F.R. 47897), Office of Energy Projects staff have reviewed the application for a new license for the Lake Chelan Hydroelectric Project, an existing, operating facility located on the Chelan River near the City of Chelan, Washington. The 48- megawatt project occupies land managed by the U.S. Forest Service and the National Park Service. In the FEA, the staff has analyzed the potential environmental impacts of the existing project and has concluded that approval of the project, with appropriate environmental protection measures, would not constitute a major federal action significantly affecting the quality of the human environment. We are aware that Chelan PUD and a number of parties continue to pursue a settlement in this case. If a settlement is filed, it will be noticed for public comment. Whether the FEA is supplemented will be based on the content of any filed settlement and subsequent comments we may receive. The FEA can be viewed at the Commission in the Public Reference Room or may be viewed on the Commission's website at http://www.ferc.gov using the "eLibrary" link. Enter the docket number excluding the last three digits in the docket number field to access the document. For assistance, contact FERC Online Support at [email protected] or toll-free at 1-866-208-3676, or for TTY, (202) 502- 8659. Magalie R. Salas Secretary FINAL ENVIRONMENTAL ASSESSMENT FOR HYDROPOWER LICENSE Lake Chelan Hydroelectric Project FERC Project No. 637 Washington Federal Energy Regulatory Commission Office of Energy Projects Division of Hydropower - Environment and Engineering 888 First Street, NE Washington, D.C. 20426 October 2003 TABLE OF CONTENTS SUMMARY ......................................................... v I. APPLICATION .................................................... 1 II. PURPOSE AND NEED FOR ACTION .................................. 1 A. Purpose of Action ............................................. 1 B. Need for Power ............................................... 2 III. PROPOSED ACTION AND ALTERNATIVES ........................... 3 A. Chelan PUD's Proposal ......................................... 3 1. Project History and Facilities ............................... 3 2. Project Operation ........................................ 4 3. Environmental Measures ................................... 5 B. Staff-recommended Alternative ................................... 6 C. No-Action Alternative .......................................... 7 D. Alternatives Considered but Eliminated from Detailed Study ............ 7 IV. CONSULTATION AND COMPLIANCE ............................... 8 A. Agency Consultation ........................................... 8 1. NEPA Scoping .......................................... 8 2. Interventions and Comments ................................ 9 B. Compliance ................................................. 10 1. Water Quality Certification ................................ 10 2. Section 18 Fishway Prescriptions ........................... 12 3. Section 4(e) Conditions ................................... 12 4. Section 10(j) Recommendations ............................ 19 5. Endangered Species Act .................................. 19 6. Coastal Zone Management Act ............................. 20 7. National Historic Preservation Act .......................... 20 8. Pacific Northwest Power Planning and Conservation Act ......... 21 V. ENVIRONMENTAL ANALYSIS ..................................... 21 A. General Description of the Lake Chelan Basin ...................... 22 B. Scope of Cumulative Effects Analysis ............................ 23 1. Geographic Scope ....................................... 23 2. Temporal Scope ........................................ 23 C. Proposed Action and Action Alternatives .......................... 24 1. Geological and Soils Resources ............................ 24 2. Water Resources ........................................ 39 i 3. Fisheries Resources ..................................... 54 4. Terrestrial and Wildlife Resources ......................... 123 5. Rare, Threatened and Endangered Species ................... 148 6. Cultural Resources ..................................... 161 7. Recreation, and other Land and Water Resources .............. 166 8. Aesthetic Resources .................................... 196 D. No-Action Alternative ....................................... 201 VI. DEVELOPMENTAL ANALYSIS ................................... 202 A. Power and Economic Benefits of the Project ...................... 202 B. Cost of Environmental Measures ............................... 203 C. Comparison of Alternatives .................................... 204 VII. COMPREHENSIVE DEVELOPMENT AND RECOMMENDED ALTERNATIVE ............................................................ 213 A. Recommended Alternative .................................... 213 B. Conclusion ................................................ 239 VIII. RECOMMENDATIONS OF FISH AND WILDLIFE AGENCIES ......... 239 IX. CONSISTENCY WITH COMPREHENSIVE PLANS .................... 253 X. FINDING OF NO SIGNIFICANT IMPACT ............................ 254 XI. LITERATURE CITED ............................................ 254 XII. LIST OF PREPARERS ........................................... 265 LIST OF FIGURES Figure 1. Comparison of averages for Lake Chelan elevations .................. 29 Figure 2. Predicted estimates of thermal energy delivered to the Columbia River at different flows through the bypassed reach ............................ 53 Figure 3. Summer water temperatures for four locations at Lake Chelan. .......... 82 Figure 4. Schematic diagram of the subreaches of Reach 4. ................... 104 Figure 5. Braid bar emphasizing spawning and rearing habitat in the modified tailrace. ............................................................ 105 ii LIST OF TABLES Table 1. Proposed Minimum lake Level Targets ............................. 28 Table 2. Average Monthly lake levels (feet, USGS) for the original license, existing license, and proposed lake level cycle ............................... 28 Table 3. Comparison of Stehekin Particulate Concentrations to National Ambient Air Quality Standards .............................................. 38 Table 4. Summary of water quality data for 1987, 1995, 1996 and 1999 for Lake Chelan ............................................................. 42 Table 5. Selected water quality standards for Lake Chelan, tributaries and bypassed reach ............................................................. 44 Table 6. List of species historically and currently present in Lake Chelan Basin .... 57 Table 7. Electrofishing results and estimated population statistics for all trout ..... 66 Table 8. Number of fish found during Lake Chelan Hydroelectric Project fish stranding surveys. ...................................................... 70 Table 9. Bypassed reach flow proposal ................................... 72 Table 10. Estimated available habitat (in acres) for cutthroat trout and suckers in Reaches 1 and 2 of the bypassed reach. ..................................... 76 Table 11. WDFW's initial minimum flow recommendation that was proposed during prefiling. ...................................................... 78 Table 12. Estimates of the temperature of the proposed 80 cfs minimum flows comprised of an equal mixture of water collected the lake surface near the dam and the lake bottom 2 miles up-lake. .......................................... 85 Table 13. Estimated available habitat (in acres) for chinook salmon and steelhead in Reach 4 of the bypassed reach. ..................................... 87 Table 14. Interior's recommended ramping rates which are based on Hunter (1992). 97 Table 15. Examples of changes in water surface elevations in Reaches 1, 2, and 4 of the Lake Chelan Project bypassed reach. ................................ 99 Table 16. Results of the barrier assessment in alluvial fans, April 1999 .......... 112 Table 17. Summary of total entrainment study catch ........................ 114 Table 18. Predicted Columbia River flows at Priest Rapids and McNary ......... 119 Table 19. Estimates of smolt production and spawners required to support the smolt yield in Lake Chelan for three species of anadromous salmonids. .............. 122 Table 20. Deer days of use along Lake Chelan based upon pellet transect data, winters of 1985-86 through 2001-02 ........................................ 129 Table 21. Rare plant populations for the Lake Chelan Hydroelectric Project based on 1998-1999 fieldwork ........................................... 153 Table 22. Summary of key parameters for economic analysis of the Lake Chelan Hydroelectric Project ........................................... 203 Table 23. Effect of proposed operational changes on dependable capacity and average annual generation at the Lake Chelan Hydroelectric Project. ............. 203 iii Table 24. Costs of proposed and recommended protection, mitigation and enhancements for the Lake Chelan Hydroelectric Project ........................... 206 Table 25. Summary of project economics for the no-action, the
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