 In addition, Ochoco Dam, built in 1920 on Ochoco Creek, blocked fish passage completely.Round Butte Dam, built in the 1950s on the Deschutes River below the Crooked River confluence, included fish passage facilities.But attempts to pass anadromous fish failed by the late 1960s, thus blocking migratory fish, such as salmon, from historic spawning and rearing habitat in the Crooked River basin.