Modern Marvels
Modern Marvels
St. Lawrence Seaway 11 Season 40 Episode
The St. Lawrence Seaway is a monumental stairway in water, lifting massive ships hundreds of feet over thousands of miles. Itโs the worldโs longest inland waterway, a system of rivers, lakes, canals, dams, and locks that stretches 2,400 miles. And itโs one of the greatest engineering triumphs of the 20th century, pulled off against the violence of raging water and extreme winter. An essential part of the commercial infrastructure of the US and Canada, this complex system provides direct access from the Atlantic to North Americaโs heartland, enabling ships packed with trade to stop at any one its 65 portsโfrom Montreal to Duluth. From the 16th century, when French explorer Jacques Cartier searched for the legendary Northwest Passage, to the modern Seaway, built in the 1950s, we highlight the incredible engineering feats that went into creating the waterway.
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