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National Park ServicePhoto of interpretive rangers at Great Falls.
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Photo Monocacy Aqueduct along C&O Canal.  

Did You Know?
Aqueducts are water filled bridges. Aqueducts carried the canal and boat traffic over major waterways, like rivers. Of the 11 aqueducts built along the canal, the Monocacy Aqueduct is the longest at 516 feet, its seven arches constructed mainly of stone quarried from nearby Sugarloaf Mountain.

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Last Updated: June 26, 2006 at 10:35 EST