Noun
a seaway involving the Saint Lawrence River and the Great Lakes that was developed jointly by Canada and the United States; oceangoing ships can travel as far west as Lake Superior
Source: WordNetCities on the shores of Lake Michigan include: Connection to ocean and open water Sunset over Lake Michigan from Grand Traverse Point The Saint Lawrence Seaway and Great Lakes Waterway opened the Great Lakes to ocean-going vessels. Source: Internet
Peck, Merton J. & Scherer, Frederic M. The Weapons Acquisition Process: An Economic Analysis (1962) Harvard Business School p.111 Chicago became an ocean port with the opening of the Saint Lawrence Seaway in 1959. Source: Internet
There is also some shipping of liquid and containerized cargo but most container ships cannot pass the locks on the Saint Lawrence Seaway because the ships are too wide. Source: Internet
The Saint Lawrence Seaway allows navigation to and from the Atlantic Ocean as far inland as Thunder Bay in Northwestern Ontario. Source: Internet