St Lawrence Seaway

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St Lawrence Seaway Waterway in Canada and the USA. Built in the 1950s, it connects the Great Lakes with the Atlantic Ocean. The St Lawrence Seaway extends about 750km (470mi) from n of Montréal down to the n shore of Lake Erie. The main part of the waterway consists of a series of canals and locks that bypass the rapids along the St Lawrence River. The waterway also includes the Welland Canal, which by-passes the Niagara Falls. The St Lawrence Seaway allows ocean-going vessels to reach industrial lakeside ports of central North America, such as Detroit, Chicago, and Toronto.