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The WDF collected wild broodstock for rebuilding coho runs on the Quillayute, Hoh and Queets River System. They have estimated that cost per spawned female averaged $330. Juvenile fish are reared to fry, then restocked into systems that are below full seeding levels. The limited data indicates low survival from fry planting to smolt emigration. This method produced a net loss of smolt production, compared to allowing the adults to spawn naturally (Anon. 1987a). WDF has outplanted yearling coho in Grays Harbor and Willapa Bay. This was used to reduce hatchery surplus and improve wild production. However, releases of yearlings were not cost effective and was discontinued. Summary Supplementation projects may detrimentally impact other anadromous and resident salmonids. A coho enhancement project in Puget Sound was at least circumstantially linked to a major decline (50 percent) in the pink salmon run in a nearby river. This evidence is substantiated by statistics that show the rest of Puget Sound pink runs increased by 38 percent for the same period (Ames 1980). Steelhead management in Washington has benefitted from the marking of hatchery produced fish. This immediate sight identification of hatchery and wild fish allows implementation of selective fishery regulations needed to protect underescaped wild runs. Further separation of hatchery and wild fish is realized by a difference in run timing. Temporal separation allows managers to collect hatchery broodstock and limit spawning interaction between wild and hatchery fish. Return timing is also useful in commercial harvest management. Hatchery fish -can be fished at a high rate without adversely impacting wild runs. Idaho Background Idaho stocks of anadromous fish are in a very depressed state. Restoration more accurately describes Idaho's efforts, which focus primarily on Chinook salmon and steelhead. Historically, Idaho supported runs of steelhead, sockeye and coho salmon as well as three races of .Chinook salmon; spring, summer and fall. Hydroelectric dams, habitat degradation, and overfishing have contributed to the decline of Idaho's anadromous fish run. Coho salmon no longer enter Idaho and -can be considered extirpated from the state. The last coho to pass Lower Granite Dam was a single adult in 1986, and only two fish passed in 1985. Sockeye salmon are now being considered by the National Marine Fisheries Service for endangered or threatened species designation in the upper Snake River. In 1989, only two adult sockeye salmon passed Lower Granite Dam. Thus, sockeye may also be extinct in Idaho. Fall Chinook salmon are not being 12