Ludington and Manistee harbors are scheduled for dredging this summer, the Army Corps of Engineers has announced. MCM Marine of Sault St. Marie, Michigan has been contracted to dredge Ludington harbor for $343,600 and Manistee for $396,460. The company is currently dredging St. Joseph harbor and is scheduled to dredge in Ludington next. Work in Manistee will begin July 15, based on state fishery regulations.