The plan’s intent is to mitigate flooding so an event like the catastrophic 2008 Cedar River flood doesn’t happen again.

The steady flow of the Cedar River cascades around sets of boulders between the Main Street Bridge and Iowa Highway 57.

Two weeks ago, the Mississippi had a 10 to 15 percent chance of a flooding event. Now, Gunkel said that projection is under a 10 percent chance for the same area. Specifically, the Cedar River has ...