DRESBACH, Minn. — The Army Corps awarded a $3.1 million contract to an Iowa company to modify the rock wier structure at Lock and Dam 7 to reduce outdraft danger. Newt Marine of Dubuque will begin in August, said Billy Thomson, project manager. The massive elevated rock structure will divert flows that pull barges dangerously off course. Already the boat ramp at the Dresbach dam is closed. Recreational boaters should be prepared for longer wait times, Thomson said. Also: Public access will be restricted. This includes fishing, he said.
Rock wier with two notches. The Dresbach structure will have three notches. Goal: Safer barge navigation through the lock.