Gold Ray Dam Interagency Technical Team Meeting

NEPA UpdateDeconstruction PlansHydraulic ModelingNext Steps

Agenda

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

NEPA Update

EA Issues from Scoping Mtg

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?

NEPA Update

EA Progress

Section 3 – Affected Environment and Environmental Consequences

Section 4 - Preparers and Agencies Consulted Section 5 – Abbreviations/Acronyms Section 6 – References

NEPA Update

EA Progress

Dam complex SHPO coordinationDetermination of eligibility (DOE) nearly complete Likely eligible for National RegisterRemoval likely “adverse effect” but mitigated

Archaeology SHPO coordination doneDOE underway – no shovel testing required

NEPA Update

Cultural Resources

“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

NEPA Update

Environmental Site Assessment

Biological Assessment Content largely completed Confirm the action area Incorporate demo/restoration plan

information

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

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

Project Approach

Deconstruction Plan Multi-step plan with controlled

drawdown of reservoir Minimizes risk for County Ensures dam removal and fish

passage when complete

Project Approach

1934 Log Crib Dam (PacifiCorp)

1940 Log CribDam (PacifiCorp)

1941 Gold Ray Dam Construction (PacifiCorp)

1941 Gold Ray Dam Construction (PacifiCorp)

November 14, 1941 (PacifiCorp)

Project Approach

Project Approach

Fish Passage Plan

Fish Passage Plan

Project Approach

Project Approach

DATE

5/24

/10

5/31

/10

6/7/

106/

14/1

06/

21/1

06/

28/1

07/

5/10

7/12

/10

7/19

/10

7/26

/10

8/2/

108/

9/10

8/16

/10

8/23

/10

8/30

/10

9/6/

109/

13/1

09/

20/1

09/

27/1

010

/4/1

010

/11/

10

CONSTRUCTION (June 15 - August 31 in-water)Access site on south side / mobilize equipment

Construct south side cofferdamRemove southern portion of concrete dam

Divert river to south channel opened by dam removal (fish passage delay)Construct north side cofferdam

Remove northern portion of concrete damRestore river to permanent channel

Construct restoration portions of project (Kelly Slough/Tolo Slough/Bear Creek)Remove existing powerhouse and fish ladders

Deconstruction Schedule

Restoration PlanProject Approach

Hydraulic Modeling

Next Steps Finalize deconstruction plan Run hydraulic modeling DRAFT NEPA Continue with public outreach

Summary