U.S. Army Corps of Engineers

A study of adult salmon and steelhead migrations past dams, through reservoirs, and into tributaries of the Snake River began in 1990 with planning, purchase, and installation of radio telemetry equipment. Adult spring and summer chinook salmon were outfitted with transmitters in 1991-1993, and adult steelhead were outfitted in 1991-1994. Progress reports have been issued periodically (Bjornn et al. 1992; 1994; 1995) and final reports as listed below. Part I of the final report includes a general introduction, methods that apply to all segments of the work, and information on passage of chinook salmon. Other parts of the final report include an introduction and methods section specific to the topic covered. Part I- Passage of chinook salmon through the lower Snake River and distribution into tributaries- 1991-1993. Part II- Passage of steelhead through the lower Snake River and distribution into tributaries- 1991-1994. Part III- Entrances used and passage through fishways for adult chinook salmon and steelhead at Snake River dams