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How do locks in the grat lakes and the St.laurencs seaway affect transportation in the midwest

User Liat
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Answer:Lock infrastructure on the Great Lakes and St. Lawrence Seaway forms an elaborate lift system allowing ships to move across a vast expanse of territory in which water levels fall more than 182 m (600 feet) from Lake Superior to the Atlantic Ocean. During that journey, a vessel will pass through 16 separate locks.

Step-by-step explanation:

User Matt Winckler
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