Chesapeake and Ohio Canal - Wikipedia
The Chesapeake and Ohio Canal, abbreviated as the C&O Canal and occasionally called the "Grand Old Ditch," operated from 1831 until 1924 along the Potomac River from Washington, D.C., to Cumberland, Maryland.The canal's principal cargo was coal from the Allegheny Mountains.. Construction on the 184.5-mile (296.9 km) canal began in 1828 and ended in 1850 with the completion of a 50-mile .
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