Washington & Old Dominion Railroad
Reporting mark: W&OD
Aqueduct Bridge (1887) (Washington, District of Columbia)
Built 1887, superstructured added in 1904 for Electric TrolleyLost Pratt deck truss bridge over Potomac River on Road/Electric RailroadLost
Clarke's Gap Bridge (Loudoun County, Virginia)
Built 1892Stone arch bridge over Washington and Old Dominion Trail on Dry Mill RoadOpen to traffic