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 of upper Great Lakes commercial shipping and the Aerial Lift Bridge. Many visitors particularly enjoy the three historically accurate replica cabins and a pilothouse from typical ships which plowed the waves of Lake Superior in years past. A three-story steam engine, 50 scale models and many interactive displays are available for visitors to explore. Thousand-foot-long freighters pass within 200 feet of the building, underneath the Aerial Lift Bridge, which lifts up to allow them to pass through. Lake Superior Maritime Visitor Center The Lake Superior Maritime Visitor Center is a museum in Duluth, Minnesota, operated by the United States Army