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
Minnesota Seaway east to the Atlantic Ocean, or the Hudson Bay watershed to the Arctic Ocean. The state's nickname, "Land of 10,000 Lakes", is apt, as there are 11,842 Minnesota lakes over in size. Minnesota's portion of Lake Superior is the largest at and deepest (at ) body of water in the state. Minnesota has 6,564 natural rivers and streams that cumulatively flow for . The Mississippi River begins its journey from its headwaters at Lake Itasca and crosses the Iowa border downstream. It is joined by the Minnesota River at Fort Snelling, by the St. Croix River near Hastings, by