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How did the St. Lawrence Seaway help expand industry near the Great Lakes?
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canals and inland waterways
The Oudegracht (Old Canal), Utrecht, Netherlands.
The St. Lawrence Seaway significantly expanded industry near the Great Lakes by opening the regionās industrial and agricultural heartlands to deep-draft ocean vessels, transforming the area into a major hub for international trade.1
The seaway facilitated industrial growth primarily through the efficient movement of essential bulk commodities:
- Iron Ore and Steel: A primary driver for the project was the discovery of vast iron ore deposits in Quebec and Labrador. The seaway allowed this ore to be transported economically to steel mills in the United States, while Canadian mills received coal from U.S. mines via the Welland Canal.23
- Two-Way Trade: Specialized vessels known as lakers maximized the efficiency of the route by carrying grain from the American Midwest and Canadian prairies to world markets, returning with industrial raw materials.23
- Energy Development: The construction of the seaway also enabled the development of hydroelectric power in the International Rapids section, providing a vital energy source for regional industry.45