Associated Press, Published August 31 2013
Crews working on Garrison Dam improvementsRIVERDALE, N.D. — Workers have been busy this summer making improvements to the Garrison Dam spillway and release gates.
The Minot Daily News reports (http://bit.ly/17w584M ) that the gates and spillway below the dam were subjected to powerful flows during high water in Lake Sakakawea in 2011.
Flows hit a record of 150,600 cubic feet per second that June. The gates had never been used prior to that time.
Todd Lindquist of the U.S. Army Corps of Engineers says repairs will include hydromilling concrete and making a permanent fix on the spillway slab.
He says the corps is also making repairs to part of the pressure release system under the slab, which is designed to combat water pressure building up beneath the spillway.
Information from: Minot Daily News, http://www.minotdailynews.com