August 14, 2020 MCM Marine to dredge Michigan’s Ontonagon Harbour under USACE contract Written by Baird Maritime on August 14, 2020. Posted in Commercial Mariner - Marine Projects, Dredging and Land Reclamation. The Detroit District of the US Army Corps of Engineers (USACE) has awarded MCM Marine a contract for maintenance dredging of Michigan’s Ontonagon Harbor on the .. Read More