The Army Corps of Engineers is increasing the flow out of Gavin's Point Dam on Tuesday, March 12th.
The temporary increase is so the Corps can conduct a spillway flow test on the dam to get an idea of the current condition of the spillway. It should only last about eight hours and it's part of the ongoing rehabilitation and repairs from the damage caused by the Missouri River flood of 2011.
Those downstream will see a rise in the river by a few feet for a short time.