Lower Monumental Dam Removable Spillway Weir
Lower Monumental Dam
Owner: U.S. Army Corps of Engineers, Walla Walla District
Dam Modifications, Diving Services / Salvage, Heavy Lifting & Rigging
The RSW is a 2.4 million pound, floating, structural steel fabrication designed to improve juvenile fish passage on the Snake River. The RSW is being fabricated in Portland Oregon at the Cascade General Shipyard by Oregon Iron Works of Clackamas, Oregon. Advanced American Construction, Inc. is performing work to prepare for the installation starting in September of 2006 and will be transporting and installing the RSW at Lower Monumental Dam in 2007. See the fact sheet at http://www.nww.usace.army.mil/ for additional information.
"We have determined that we are passing more fish with less water," Corpsí Project Manager Cary Rahn says. "We have found that survival rates of fish are 98 percent when going over surface routes."
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