Opening paddle valves on Lock 20
Map of planned route.
Lift lock during the operating days. Note the whitewash on this lock.
A boat on the canal, circa 1900-1924
Rake and trash pulled out of water so that lock gates can be opened
Canal boats waiting to be unloaded in Georgetown.
Drop lock mechanism on Lock 10 (Seven Locks)
Low-angle bird's-eye view of central Washington toward the west and northwest with The Capitol in foreground. The Canal is visible running along the mall.
Example of iron cramps used to hold together the stones of Lock 24 (Riley's Lock)
C&O Canal in the Georgetown neighborhood of Washington, D.C.
A lock tender's shanty, at Lock 50
Boat construction yard in Cumberland, MD
The bypass flume around Lock 7
Map of Terminus in Cumberland in the mid 1890s. Yellow dots indicate modern highways as well as current (2013) location of Canal basin.
Rough stonework of a composite lock (L) vs smooth stonework of a regular lock (R). Note iron bolt (L) which would hold the wood lining.
Register of waybills in the Cumberland Office, in 1858. Each canal boat had to have a waybill, even if empty, for passage through the canal. Fines were levied for lack of a waybill.
Example of concrete lined composite lock (#70). Lining is broken showing stonework behind. Original gates are missing.
5 and 10 dollar notes, from C&O Canal company
Floodwaters around Lock 6 in 1936
Great Falls feeder culvert (no longer used) indicated by yellow arrow(14.08 mi), and Lock 18 (R).
Boat at Big Slackwater
An informal overflow. The towpath dips, allowing water to flow over it. Note the boards in the background for people to walk on.
Paw Paw Tunnel
Remains of the inclined plane
Culvert #30 lets Muddy Branch under the canal
Repairs at Big Pool
Mules being fed.
A steamboat on the C&O Canal. Note the steering wheel and the smokestack on this boat
Children tethered to canal boat. This photo was probably taken in one of the Cumberland basins.
Model interior of a C&O Canal freight boat
Recent view of the 9 mile level (between 33 and 34 miles) where the ghosts were reported to haunt.
Monocacy aqueduct in 2011, where the ghost of a robber could allegedly be seen on moonless nights

The Locks on the Chesapeake and Ohio Canal, located in Maryland, West Virginia, and Washington, D.C. of the United States, were of three types: lift locks; river locks; and guard, or inlet, locks.

- Locks on the Chesapeake and Ohio Canal

Since it was difficult to obtain stone for the locks, engineers built composite locks, sometimes of kyanized wood.

- Chesapeake and Ohio Canal

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