The U.S. Army Corps of Engineers installed an RSW at Lower Granite Dam in early 2002 to improve fish passage and survival at the dam. Early results showed that both passage and survival improved and that it was accomplished with less spill at the dam. Seeking a lower cost and more effective way to spill water to improve fish survival, the Bonneville Power Administration in October 2002 proposed to SCT to accelerate the installation of RSWs at Ice Harbor and Lower Monumental dams…
