Tieton Dam

Tieton Dam is an earth and concrete type dam on the Tieton River in Yakima County, in the U.S. state of Washington. The dam began operation in 1925. Its reservoir, Rimrock Lake, has a total capacity of with a normal operating capacity of to provides water for agricultural irrigation. This dam is a component of the Yakima Project. Upstream from the dam, the river is impounded by Clear Creek Dam, another element of the Yakima Project. About downstream from the dam, the Tieton River is tapped for the Tieton Main Canal.