Saint Lawrence Seaway Development Corporation is an agency of the United States Department of Transportation. It operates the St. Lawrence Seaway in cooperation with the St. Lawrence Seaway Management Corporation of Canada. The corporation maintains navigation on the part of the seaway system that lies between Lake Erie and Montreal, within the territorial limits of the United States. It also operates the Eisenhower and Snell locks near Massena, New York. The corporation also develops trade and traffic for the entire seaway, including the Great Lakes.
The U.S. government created the agency in 1954 to build, operate, and develop the United States portion of the seaway. An administrator appointed by the president heads the corporation.
