30 Jul 2025

Corps of Engineers to start dredging Manistique Harbor

The U.S. Army Corps of Engineers, Detroit District will start a maintenance dredging project at Manistique Harbor as early as August 7. The $1.865 million project will remove 92,500 cubic yards of sediment and place it along the west breakwater beach area below the ordinary high-water mark and west of the breakwater extending 7,000 feet along the nearshore lake bottom from four to ten feet deep. “The Corps of Engineers annually performs hydrographic condition surveys to assess shoaling in federal harbors and navigation channels,” said Corps of Engineers St. Marys River Section Chief Justin Proulx. “Those assessments have demonstrated significant shoaling in Manistique Harbor. Maintaining a 12 foot depth in the harbor is essential for safe commercial and recreational users, and the Corps of Engineers looks forward to dredging and reutilizing the shoaled material to nourish high erosion areas of the nearby shoreline.”