CHESAPEAKE & OHIO CANAL NATIONAL HISTORICAL PARK

At Chesapeake & Ohio Canal National Historical Park in Maryland, West Virginia, and the District of Columbia, the National Park Service is working to stabilize and strengthen the Monocacy Aqueduct to protect it from floods on the Potomac and Monocacy Rivers. The Monocacy Aqueduct is the largest and most impressive of the 11 aqueducts erected along the canal, and is often described by many historians as one of the finest canal features in the United States.

National Park Service photo.

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