St. Lawrence Seaway Development Corporation
The St. Lawrence Seaway Development Corporation (SLSDC) is the agency of the United States Department of Transportation that operates and maintains the U.S.-owned and operated facilities of the joint United States-Canadian St. Lawrence Seaway. It operates 2 of the 15 locks of the Seaway between Montreal and Lake Erie. Its Canadian counterpart is the St. Lawrence Seaway Management Corporation, a non-profit corporation under Canadian law. The post of administrator has been vacant since 2017.