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-Superior Dukes (1956–70) Duluth-Superior Dukes (1956–70) The Duluth-Superior Dukes were a minor league baseball team , based in Duluth, Minnesota that played from 1956 to 1970 in the Northern League. The franchise formed in 1956 as the Duluth-Superior White Sox after a merger of the Duluth Dukes and the Superior Blues. The team name was changed back to the Dukes in 1960. From 1960 to 1964, they were affiliated with the Detroit Tigers. In 1965, they were affiliated with the Tigers and Chicago Cubs. In 1966, they were affiliated with the Cubs. In 1967, they were affiliated with the Cubs and Chicago White