Fish counting at the dams was started as each dam was put into service: at Bonneville in 1938, at McNary in 1954, at The Dalles in 1957, at Ice Harbor 1962, at John Day in 1968, at Lower Monumental in 1969, at Little Goose in 1970, and at Lower Granite in 1975.
The Fish Passage Center (FPC) provides current and historic data on salmon and. An n/a in the shad columns at Bonneville Dam and Lower Granite Dam after. In 2012, the U.S. Army Corps of Engineers and NOAA Fisheries are currently .
USACE Dams Video and Live Counting: From November through March, video tape fish counting occurs at US Army Corps of Engineers dams with fish ladders on the Columbia and Snake Rivers.
Data Courtesy of U.S. Army Corps of Engineers.. Adult Visual Counts Chinook at Bonneville Dam, 3/15 – 6/15 2008 – 2017. . Bonneville Dam: Lamprey is the combined count from the fish counting windows at Bonneville, reported daily.
Most steelhead bound for Idaho cross Bonneville Dam between July 1 and October 31. Information on numbers of steelhead crossing the Columbia and Snake River dams is taken from data posted by the United States Army Corps of Engineers, and is updated weekly during the counting season.
Fish counts in Oregon are maintained and followed by many organizations and through a variety of methods. ODFW provides these comprehensive web .