MINNEAPOLIS –The Army Corps of Engineers opened the gate at its Upper St. Anthony Falls lock in response to the likelihood of serious Mississippi River flooding. As a result, water will be too high and too rough for commercial navigation downstream through the Lower St. Anthony Falls Lock and Lock 1, both also in Minneapolis. The Corps opened the Upper St. Anthony gate after the National Weather Service predicted the flow at 52,000 cubic feet per second the next few days because of spring snowmelt. Opening the gate should reduce the the flow by 10,000 to 14,000, the Corps said. The plan is to keep the gate open until the flow slows fall below 40,000.

Earlier: Mississippi flow surging, moving to flood stage

The roar of the flow. The lock, built in 1963, has been opened to relieve flood risks only seven times. This photo is from 2014.

MSP flodgate lock 1 eushug 2014 1 - Winona Journal