Williamsport, Maryland

C&O Canal Conococheague Creek Aqueduct (Washington County, Maryland)
Built 1834
Three-span stone arch bridge over Conococheague Creek on the C&O Canal
Open to pedestrians

Chesapeake & Ohio Canal Lift Bridge (Washington County, Maryland)
Currently owned by Chesapeake and Ohio Canal National Historical Park
1923 Girder and truss lift bridge over C&O Canal
Closed to all traffic

Conococheague Creek Bridge (Washington County, Maryland)
Built 1829; rehabilitated 1987
Stone arch bridge over Conococheague Creek on MD 68 (Clearspring Rd.)
Open to traffic

Route 11 Bridge (Washington County, Maryland)
Built 1909; rehabilitated 1980
Steel stringer bridge over Potomac River, Csx Trans on Us 11
Open to traffic