TRASH RACKS (HYDRAULIC STRUCTURES); Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.
Trash Racks on the upstream side of Grand Coulee Dam. The trash racks were to keep floating debris from entering the penstocks and damaging the turbines.
Structures which were to be inundated by the reservoir were removed before the lake started to fill. The photo appears to show the destruction of one of the piers which supported the Great Northern bridge across the Columbia at Marcus, Washington.