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
Duluth, Minnesota and is water. It is Minnesota's second-largest city by land area, surpassed only by Hibbing. Of its , , or 77.89%, is land and , or 22.11%, is water. Duluth's canal connects Lake Superior to the Duluth–Superior harbor and the Saint Louis River. It is spanned by the Aerial Lift Bridge, which connects Canal Park with Minnesota Point ("Park Point"). Minnesota Point is about 7 miles long, and when included with adjacent Wisconsin Point, which extends 3 miles from the city of Superior, Wisconsin, is the largest freshwater baymouth bar in the world at a total of 10 miles. Duluth's