60 Years - On this day in 1959, The St. Lawrence Seaway linking Atlantic and the Great Lakes opens to shipping. The St. Lawrence Seaway is in the St. Lawrence River that runs along the northwest border of New York State and Canada. It empties into Lake Ontario on one end, and connects to the Atlantic Ocean at the other. This shipping channel is mostly managed by the United States except for the areas between Montreal and the Atlantic, and that is monitored by Canada. The seaway sees about 40-50 million tons of cargo a year that is headed either between the US and Canada or out to Europe, Africa, or the Middle East.