The Coast Guard is establishing a temporary safety zone on the waters of the Missouri River from mile markers 27 to 366. The safety zone is to protect personnel, vessels, and the marine environment from potential hazards created by high water levels and levee conditions. Entry of vessels or persons into the zone is prohibited unless specifically authorized by the Captain of the Port, Sector Upper Mississippi River or a designated representative.
Source: Federal Register USCG
Link: Safety Zone; Missouri River, Mile Marker 27-366