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St. Lawrence Seaway: Quick Facts

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Photos

Map showing the St. Lawrence hydrographic system and the five main sectors of the St. Lawrence Seaway project, stretching from Lake Ontario near Kingston through various locks, canals, and dams along the Canada-United States border to Montreal. The map highlights key locations such as the Thousand Islands, International Rapids, Lake St. Francis, Soulanges, and Lachine sections, with detailed labeling of major locks, canals, and power dams. Cross sections of the lock and canal system are depicted
St. Lawrence Seaway
St. Lambert Lock
Welland Canal
Thousand Islands
Map showing the St. Lawrence River system and the Great Lakes region of North America, with arrows indicating water flow from Lake Superior through Lakes Michigan, Huron, Erie, and Ontario, following the St. Lawrence River to the Atlantic Ocean. Below the map, a cross-sectional profile illustrates the elevation changes along the St. Lawrence Seaway and Great Lakes from Duluth to Montreal, highlighting key features such as Niagara Falls, the Welland Ship Canal, and major lakes.
Map showing the St. Lawrence hydrographic system in eastern Canada and the northeastern United States, highlighting the five main sectors of the St. Lawrence Seaway project from the Great Lakes to the Atlantic Ocean. The map labels major cities, waterways, and lock and canal locations along the seaway, illustrating its route from Lake Superior and Lake Michigan through the St. Lawrence River to the Gulf of St. Lawrence.
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