B&O Patterson Bollman Bridge[Map] Lost Bollman through truss bridge over Patapsco River on Former Baltimore & Ohio Railroad Replaced by a new bridge Built 1869 atop washed-out ruins of Patterson Viaduct, replaced 1902-03 by line realignment
Bollman Bridge[Map · Street View] Bollman through truss bridge over Little Patuxent River in Savage, near the intersection of Goman Road and Foundry Street Open to pedestrians Built for the main line of the B&O Railroad in 1869. Moved to present location around 1887. Remained in service until 1947. Restored in 1968 (perhaps 1983).
CSX Patapsco River Bridge[Map · Street View] Through truss bridge over Patapsco River, Ilchester Road on CSX Railroad (formerly B&O Railroad Old Main Line) Open to traffic Built 1902 by the American Bridge Company; once carried 2 tracks
CSX Tunnel[Map] Tunnel under US 40 on Railroad (CSX) Open to traffic
Patterson Viaduct[Map] Abandoned stone arch bridge over Patapsco River on Baltimore & Ohio Railroad Derelict/abandoned Built May-December 1829, washed out 1868 and replaced with Bollman truss until 1902-03; one arch and abutments remain
Pratt Bridge[Map] Pratt through truss bridge over Little Patuxent River on formerly the Patuxent Branch of the Baltimore and Ohio Railroad, currently carries the Patuxent Branch Trail Open to pedestrians Built in 1902 for the B&O Railroad, abandoned in 1925, rehabilitated in 2002 for trail use.
Thomas Viaduct[Map · Street View] Eight-span stone arch bridge over Patapsco River on the B&O Railroad between Relay and Elkridge Open to traffic Built 1835