The St. Lawrence Seaway was built in the 1950s to accommodate large ocean-going vessels on their journey from the Atlantic Ocean to the Great Lakes. This water route is vital to the development of both the United States and Canada because it decreased the population in the area along the Seaway.

it helped lower taxes between North America and Europe.

it helped maintain Quebec’s culture in a peaceful way.

it created shipping areas and inland coastlines for the United States and Canada.