MINNEAPOLIS (WCCO) — Minneapolis’ three major locks on the Mississippi River have reopened to commercial traffic Friday, according to the U.S. Army Corps of Engineers.

The three locks – the Upper St. Anthony Falls, the Lower St. Anthony Falls and Lock and Dam 1 near Minnehaha Park – were closed to commercial traffic on June 4 due to dangerous water levels. Recreational traffic was prohibited on June 2.

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The district is required to close the locks and dams when river levels exceed 40,000 cubic feet per second for commercial traffic, and 30,000 cubic feet per second for recreational traffic.

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These locks and dams are still closed to recreational traffic.

The Corps urges boaters to be cautious on the Mississippi River due to high waters and the threat from submerged logs and debris that are below the water’s surface.

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They also recommend boaters wear life vests at all times.