A report on Chesapeake and Ohio Canal and Riley's Lock

Canal boats waiting to be unloaded in Georgetown.

Charles Wood was Lock 24 keeper "L.K." in 1865

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.

Canal boat on Seneca Aqueduct over Seneca Creek in 1882

C&O Canal in the Georgetown neighborhood of Washington, D.C.

Seneca Creek, Seneca Aqueduct, and Riley's lock house in 2012

Boat construction yard in Cumberland, MD

John and Roberta Riley gravestone at Darnestown Presbyterian Church

Map of Terminus in Cumberland in the mid 1890s. Yellow dots indicate modern highways as well as current (2013) location of Canal basin.

Riley's Lock and lock house in 2020 as viewed from walkway on the Seneca Aqueduct over Seneca Creek

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.

5 and 10 dollar notes, from C&O Canal company

Great Falls feeder culvert (no longer used) indicated by yellow arrow(14.08 mi), and Lock 18 (R).

An informal overflow. The towpath dips, allowing water to flow over it. Note the boards in the background for people to walk on.

Culvert #30 lets Muddy Branch under the canal

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

Riley's Lock (Lock 24) and lock house are part of the 184.5-mile (296.9 km) Chesapeake and Ohio Canal (a.k.a. C&O Canal) that operated in the United States along the Potomac River from the 1830s through 1923.

- Riley's Lock

This unique structure is the only aqueduct made from Seneca red sandstone and is doubly unique for being the only aqueduct on the C&O that is also a lock (Lock 24, Riley's Lock).

- Chesapeake and Ohio Canal

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Aqueduct, with Riley's Lockhouse at upper right.

Seneca Aqueduct

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Seneca Aqueduct — or Aqueduct No. 1 — is a naviduct that carries the Chesapeake and Ohio Canal (C&O) over Seneca Creek in Montgomery County, Maryland.

Seneca Aqueduct is a unique structure, not only being the first built, but also the only red sandstone aqueduct on the C&O−and the only aqueduct that is also a lock (Lock 24, or Riley's Lock).