May 2017- October 2017 Associated Underwater Services was subcontracted to perform the diving portion of the Nine Mile Falls Sediment Bypass Project. This project entailed two phases of work. Phase one was primarily focused on sediment removal and relocation. The second phase was focused on the installation of new dam components. The work scope included:
RSW (Removable Spillway Weir) is a 1,100-ton prototype fish bypass structure installed in spillbay 1 on the upstream side of the Dam. The RSW is hinged on the dam face and rotates to an up or down position using ballast tanks. The buoyancy tanks are operated by a computerized system that controls ascent and descent.
Box Canyon Dam Upstream Fish Passage Project Fall of 2017 Box Canyon Dam, located on the Pend Oreille River in Washington, is required to provide upstream fish passage for the Bull Trout, West slope Cutthroat, and the Mountain Whitefish. AUS provided diving support for the project working for the General contractor, J.W. Fowler, and