U.S. Army Corps of Engineers, Detroit District, field team Senior Hydraulic Engineer Matt McClerren, left, and Hydraulic Technician Jon DePhillips document St. Clair River ice jams on the St. Clair River at Algonac State Park February 3, 2021. Using strategically placed water monitoring equipment and a field team, the U.S. Army Corps of Engineers is providing technical advice for St. Clair River U.S. and Canadian coast guard ice breaking operations.