Wanapum Dam spillway update

By Grant Co. PUD

On Feb. 24, 2014, a worker at Wanapum Dam noticed that part of the dam’s spillway deck had shifted slightly. Divers were called in to inspect the area on Feb. 27 and discovered a fracture below the water line on Wanapum Dam’s spillway pier monolith No. 4. The fracture ran in a horizontal direction across the 65-foot width of the monolith and had a 2-inch opening. Read Sept. 15, 2014 Wanapum Spillway Update