Great Lakes and St. Lawrence Seaway Development Corporation

The Great Lakes and St. Lawrence Seaway Development Corporation (GLS) is a U.S. government agency responsible for overseeing and supporting navigation on the Great Lakes and the St. Lawrence Seaway. It works with Canadian partners to operate and maintain the shipping routes, allowing large vessels to travel between the interior of North America and the Atlantic Ocean. This facilitates trade, supports local economies, and ensures safe, efficient passage for commercial vessels. The GLS plays a key role in promoting U.S. access to international markets via this vital waterway network.