The Saint Lawrence Seaway Development Corporation (SLSDC) is a U.S. government agency responsible for the operation and maintenance of the U.S. portion of the Saint Lawrence Seaway. This waterway connects the Great Lakes to the Atlantic Ocean, facilitating international trade and transportation. The SLSDC works to ensure safe navigation and efficient movement of cargo through the seaway. Established in 1954, the SLSDC plays a crucial role in promoting economic growth by supporting maritime commerce. It collaborates with the Saint Lawrence Seaway Authority, the Canadian counterpart, to manage the seaway effectively. Together, they enhance the competitiveness of the Great Lakes region in global markets.