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Salmon Gallery

<< 7/12 < > Chinook salmon were abundant at one time in Idaho, as well as in most of the larger river systems in the northern half of the Pacific coast. Since 1958, the Hells Canyon Dam Complex has blocked the middle Snake River and its tributaries from migration. After the Lower Snake River Dams were completed in 1975, Chinook numbers declined even further. By 1990, only 576 fall chinook were counted crossing Lower Granite Dam, and in 1999 just 3,500 spring chinook returned. Credit: CDC Public Health Image Library Creator: Evans, Mary

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