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Chesapeake & Ohio Canal National Historical ParkPhoto of the Monocacy Aqueduct
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Chesapeake & Ohio Canal National Historical Park
Canal and River Structures

The canal itself was a "prism", wider at the water's surface than at the bottom, and large enough for two boats to pass each other. Digging and blasting the channel for the canal was hard and dangerous work, and the result was often just referred to as a ditch. The masonry parts were held in higher esteem, and were termed "works of art" in the canal company's documents. These included the locks, culverts, aqueducts, and the waste weirs that regulated the flow of water through the canal and turned it into an engine to lift and lower the canal boats.

The stonemasons were the most prominent craftsmen of the canal, painstakingly cutting blocks of stone to as small a tolerance as a half-inch. Unfortunately, this sort of craftsmanship is much too time consuming and expensive for the modern world. The highway bridges that vault the river and the canal are more sensibly formed of concrete, but this sort of construction did not develop until well after the canal was built. Concrete was not used on the canal until 1906, and is most commonly found as replacement work in waste weirs and lock pockets. 

Some C&O Canal structures are:

Lift locks

Lock houses

Feeder Dams

Waste weirs

Culverts

The Paw Paw Tunnel

Photo canal boat exiting lock 20.  

Did You Know?
Most freight boats on the C&O Canal were approximately 95 feet long and 14.5 feet wide while most locks were 100 feet long and 15 feet wide. This left boat captains little margin for error as they steered their boats into the locks, trying to avoid the $5.00 fine for damaging lock masonry.

Last Updated: July 22, 2006 at 08:11 EST