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Welcome to the Saint Lawrence Seaway Development Corporation (SLSDC) news and information archive. The SLSDC and Canada's St. Lawrence Seaway Authority jointly operate the Great Lakes St. Lawrence Seaway System. This 2,300 mile stretch of water encompasses the St. Lawrence River and the five Great Lakes. It extends from the Gulf of St. Lawrence at the Atlantic Ocean to the western end of Lake Superior, and carries ships between the Atlantic Ocean and the Great Lakes through an intricate series of locks and dams. |
