The New Student's Reference Work/St. Mary's Strait

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St. Ma′ry’s Strait or River connects Lakes Superior and Huron, and forms the boundary between Ontario and the upper peninsula of Michigan.  The strait is sixty-three miles long.  One mile below Lake Superior are the rapids called the Sault Ste. Marie, below which the river spreads out into a broad lake.  These rapids have a fall of 20½ feet, around which a canal was built in 1855, most of it cut through solid rock.  In 1895 a canal was opened on the Canadian side.