Work Proceeding On Oahe Dam Emergency Spillway
by Associated Press
July 16, 2013 7:06 AM
Work this summer is proceeding on the upstream side of the emergency spillway structure for Oahe Dam.
The goal is to bring the channel back in step with its original design. The 2011 Missouri River flood nearly sent water over the spillway and down the channel for the first time in the dam's 50-year history.
Operations project manager Eric Stasch says the pool elevation reached a mark of 1,619.7 feet above mean sea level, or some 3.5 to 4 inches lower than the point at which the emergency spillway would have gone into service.
Crews in early 2013 removed about 31,000 cubic yards while the upstream ground was still frozen and pool elevations were low. Work is also progressing on the spillway gate.