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What is the height of the St. Mary's River rapids?

  • More than 6 m

  • Less than 6 m

  • About 10 m

  • About 5 m

Answer

The rapids and cascades of the St. Mary's River descend more than 6 m from the level of Lake Superior to the level of the lower lakes. This slowed shipping traffic hundreds of years ago, requiring an overland portage of boats and cargo from one lake to the other.
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