2008-465-00

Melvin R Sampson (MRS) Coho Hatchery Operation & Maintenance (O&M)

The primary goal of Phase 3 of the artificial production program is to provide fish for harvest. This goal
will be accomplished by implementing both segregated and integrated hatchery programs in the basin.
The segregated program component will be located at Prosser Hatchery on the lower Yakima River and
integrated program will be located at Holmes Ranch Hatchery on the Upper Yakima River. The
segregated program will release 500,000 smolts (at 15 fpp) downstream of Prosser Dam using
broodstock collected at Prosser. The integrated program will rear and release 500,000 parr (at 100 fpp)
and 200,000 smolts (at 20 fpp) in the upper Yakima and Naches rivers using broodstock collected at Roza
and Sunnyside. Fish will be 100percent coded wire-tagged but not adipose fin-clipped. Different coded
wire tag codes will be used to distinguish release locations.
Major changes in the program from what has occurred historically are (1) all fish culture activities will
occur in-basin and (2) the program will transition to locally adapted broodstock at ever increasing rates
as natural-origin fish become available. No more than 20 percent of the natural run (to be measured at
Prosser) will be taken for broodstock in any year.

Summary of Proposed Holmes Ranch Hatchery Operations
Improvements are proposed at Holmes Ranch Hatchery to support the upper Yakima coho program.
Due to limited surface and groundwater supplies, the rearing phases for both yearling and sub-yearling
(parr) coho will use a 25 percent make-up water reuse system similar to that proposed at Marion Drain.

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2008

2032

Andrew Traylor

Implementation - Project Status Report

Province	Subbasin	%
Columbia Plateau	Yakima	100.00%

Artificial Production

Supplementation

Coho - Unspecified Population

Anadromous: 100.0%   Resident: 0.0%   Wildlife: 0.0%

RME Cat Review - Remove from AP portfolio (Public Tags)
Council Recommended Projects (Public Tags)

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