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Great Falls Observation Platform
Mile 14.34 - There's a large platform with a view of the river here. This platform is built atop the Army Corps of Engineers Washington Aqueduct Intake. On the right you can see the Great Falls water supply dam, built in 1864.
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The
Washington Aqueduct starts here and runs underground for 12 miles to
Georgetown. The control gatehouse (no longer used) for the aqueduct is
right beside the Great Falls Tavern at lock 20.