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Gold Ray Dam Interagency Technical Team Meeting

Gold Ray Dam Interagency Technical Team Meeting. Agenda. NEPA Update Deconstruction Plans Hydraulic Modeling Next Steps. NEPA Update. EA Issues from Scoping Mtg. Upstream habitat (wetlands, fish, frogs, riparian areas) Well levels Downstream domestic water intakes Sediment quality

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Gold Ray Dam Interagency Technical Team Meeting

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  1. Gold Ray Dam Interagency Technical Team Meeting

  2. Agenda NEPA Update Deconstruction Plans Hydraulic Modeling Next Steps

  3. NEPA Update EA Issues from Scoping Mtg • Upstream habitat (wetlands, fish, frogs, riparian areas) • Well levels • Downstream domestic water intakes • Sediment quality • Recreation • Economic impacts (fishing and river guides) • Alternatives – dam rehab and power generation

  4. NEPA Update EA Progress • Section 1 – Introduction • Section 2 – Purpose and Need and Alternatives • Purpose and need – complete • No action • Alternative 1 – Dam Removal • Deconstruction plan • Restoration plan • Alternative 2 – Dam Rehabilitation • Dam, forebay walls, etc. (structural) • Fish Ladder • Fish Screening • Power generation – optional?

  5. NEPA Update EA Progress • Section 3 – Affected Environment and Environmental Consequences • Section 4 - Preparers and Agencies Consulted • Section 5 – Abbreviations/Acronyms • Section 6 – References

  6. NEPA Update Cultural Resources • Dam complex • SHPO coordination • Determination of eligibility (DOE) nearly complete • Likely eligible for National Register • Removal likely “adverse effect” but mitigated • Archaeology • SHPO coordination done • DOE underway – no shovel testing required

  7. NEPA Update Environmental Site Assessment • “Level 1” – based on records and site visit; no testing • Look for indicators for contamination • Recommend testing locations in power house and former transformer sites

  8. Project Approach Biological Assessment • Content largely completed • Confirm the action area • Incorporate demo/restoration plan information

  9. Project Approach Wetlands Report • Submitting 2 wetland reports: Delineation Report and Indirect Wetland Impact Report • Reports are drafted; waiting for 2 year event modeling to finalize maps

  10. Project Approach Schedule • Review draft EA and permit applications in middle of January • Draft EA – 30 day review and revision • Goals: • Submit BA and permit applications in early February • EA out for public review in mid to late February

  11. Project Approach Deconstruction Plan • Multi-step plan with controlled drawdown of reservoir • Minimizes risk for County • Ensures dam removal and fish passage when complete

  12. 1934 Log Crib Dam (PacifiCorp)

  13. 1940 Log Crib Dam (PacifiCorp)

  14. 1941 Gold Ray Dam Construction (PacifiCorp)

  15. 1941 Gold Ray Dam Construction (PacifiCorp)

  16. November 14, 1941 (PacifiCorp)

  17. Project Approach

  18. Project Approach

  19. Fish Passage Plan

  20. Fish Passage Plan

  21. Project Approach

  22. Project Approach Deconstruction Schedule

  23. Project Approach Restoration Plan

  24. Hydraulic Modeling

  25. Summary Next Steps • Finalize deconstruction plan • Run hydraulic modeling • DRAFT NEPA • Continue with public outreach

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