46°42′22″N 92°02′38″W / 46.706244°N 92.043896°W
_map.svg)
Walter Butler Shipbuilders Inc. was a large-scale World War II ship manufacturing shipyard, located at Superior, Wisconsin, United States. Walter Butler purchased the shipyard from Lake Superior Shipbuilding in 1942. Walter Butler Shipbuilders Inc. was at E 1st St, Superior, Wisconsin. The shipyard was located on the western part of Lake Superior. Walter Butler Shipbuilders Inc. was found by Walter Butler in 1942 to build ships for World War II. Walter Butler Shipbuilders Inc., the McDougall Duluth Shipbuilding Company and the Superior Shipbuilding Company (now Fraser Shipyards) were called the Twin Ports shipbuilding industry of Minnesota and Wisconsin. Once built the ships can travel to the Atlantic Ocean through the Great Lakes and the Saint Lawrence Seaway.
To expand operations and built more ships the Emergency Shipbuilding Program, Walter Butler purchased the Barnes-Duluth Shipbuilding at 110 Spring Street, Duluth, Minnesota, now the site of the West Duluth's Spirit Lake Marina. The Duluth shipyard was located on St. Louis River Estuary 6 miles west of the Superior shipyard. The shipyard was called Walter Butler Shipbuilders-Duluth. At the Duluth shipyards built were C1-M type ships. The Superior and Duluth shipyards closed in August 1945, as all war contacts ended and there was a surplus of ships at the end of the war. In 1950 the Superior shipyard site became the Enbridge Ogdensburg Pier that serves the inland Enbridge's Superior Terminal.