Great Lakes Waterway River between Huron and Erie. Usually, one or more U.S. Coast Guard icebreakers help keep the water passage open for part of the fall and early winter, although shipping usually ceases for two to three months thereafter. The Great Lakes Waterway is co-administered by the governments of Canada and the United States of America. The waterway allows passage from the Atlantic Ocean to the inland port of Duluth on Lake Superior, a distance of and to Chicago, on Lake Michigan, at . Together with the Saint Lawrence Seaway, the Waterway allows both ocean-going vessels and the ore, grain and coal-bearing
Lake Superior Maritime Visitor Center Lake Superior Maritime Visitor Center The Lake Superior Maritime Visitor Center is a museum in Duluth, Minnesota, operated by the United States Army Corps of Engineers. The museum is in Duluth's Canal Park near the Aerial Lift Bridge and overlooks the entrance to the Duluth-Superior harbor. The museum and grounds are all property of the U.S. federal government. All visitors are welcome to visit this museum without paying. Donations are accepted by the Lake Superior Marine Museum Association, and support general maintenance and upkeep of the building, new exhibit development and acquisition, and staffing. Exhibits demonstrate the history and operations