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St. Paul, MN 55101

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Corps of Engineers is lowering the Mississippi River in Minneapolis for maintenance at Lock and Dam 1

U.S. Army Corps of Engineers, St. Paul District
Published June 21, 2023
Updated: June 21, 2023

The U.S. Army Corps of Engineers, St. Paul District, and Minnesota Department of Natural Resources, plan to slightly lower the Mississippi River between Lower St. Anthony Falls and Lock and Dam 1, both in Minneapolis, starting June 24.

Corps officials plan to maintain the lower river elevations through July 7, to inspect and repair the rubber dam on top of the spillway at Lock and Dam 1. To access the rubber dam, the water levels will be lowered approximately one foot below the spillway crest for approximately two weeks. Once the repairs are complete, the normal water levels are expected to be restored no later than July 9. Navigation will remain open to the public during maintenance.

The St. Paul District is responsible for supporting inland navigation by managing 13 locks and dams and by maintaining the 9-foot navigation channel from Minneapolis to Guttenberg, Iowa. Keeping this system open is vital to the nation’s economy.



Public Affairs

Release no. 23-035