The Corps of Engineers provides for counting of adult salmon, lamprey, shad, sturgeon, and bull trout migrating through Corps owned hydro-electric facilities: Bonneville, The Dalles, John Day and McNary on the Columbia River; Ice Harbor, Lower Monumental, Little Goose and Lower Granite on the Snake River.
Fish counts are estimates of the actual numbers of passing fish. More detailed information about count schedules at each dam may be found in the current Fish Passage Plan.