US Army Corps of Engineers
St. Paul District Website

Staff at Lock and Dam 4, in Alma, Wis., hosted an open house – attended by more than 600 people – on July 28, 2018. For four hours the doors were open for the curious to explore the lock house, lock walls and even the structures atop the dam housing the machinery that operates the roller gates. Those in attendance were also able to see several recreation vessels lock through and, shortly after noon, witnessed the Motor Vessel Show Me State lock through 12 barges on its way downstream!

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Photo by: Patrick Loch |  VIRIN: 180728-A-CQ961-101.JPG

Contact Public Affairs

U.S. Army Corps of Engineers
St. Paul District
Public Affairs Office
180 5th St. E., Suite 700
St. Paul, MN 55101
Phone: (651) 290-5807
Fax: (651) 290-5752