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Baltimore County
Allender Road Bridge [Map] Lost Deck plate girder bridge over CSX Railroad on Allender RoadReplaced by a new bridgeBuilt 1945 by Baltimore & Ohio Railroad; Replaced 1998
Allender Road Bridge (Older) [Map] Lost Greiner through truss bridge over Baltimore & Ohio Railroad on Allender RoadReplaced by a new bridgeBuilt 1909; Replaced 1945
AMTK - Gunpowder River Bridge [Map · Street View] Girder bridge over Gunpowder River on Amtrak RR ( 2 tracks)Open to rail traffic, draw mechanism removedBuilt 1912-13 one track at a time to replace wooden pile trestle
Back River Bridge [Map] Lost steel stringer bridge over Back River on Eastern AvenueReplaced by a new bridge
Benson Mill Road Bridge [Map] Concrete arch bridge over Blackrock Run on Benson Mill RoadOpen to trafficBuilt 1909; rehabilitated 2001
Big Falls Road Bridge [Map] Concrete arch bridge over Gunpowder Falls on Big Falls RoadReplaced by a new bridgeBuilt 1933
BO - Patterson Bollman Bridge [Map] Lost Bollman through truss bridge over Patapsco River on Former Baltimore & Ohio RailroadReplaced by a new bridgeBuilt 1869 atop washed-out ruins of Patterson Viaduct, replaced 1902-03 by line realignment
BO - Patterson Viaduct [Map] Abandoned stone arch bridge over Patapsco River on Baltimore & Ohio RailroadDerelict/abandonedBuilt May-December 1829, washed out 1868 and replaced with Bollman truss until 1902-03; one arch and abutments remain
Bottom Road Bridge [Map] Through truss bridge over Little Gunpowder Falls on Bottom RoadOpen to trafficBuilt 1886; rehabilitated 2001
BTCO - Jones Creek Drawbridge [Map] Lost Deck plate girder swing bridge over Jones Creek on Baltimore Transit CompanyNo longer existsBuilt 1906, removed after service ceased 1958
BTCO - North Point Creek Bridge [Map] Lost Deck plate girder swing bridge over North Point Creek on former Baltimore Transit streetcar lineRemoved but not replacedBuilt 1906; removed after end of streetcar service in 1958
BTCO - Patapsco River Bridge [Map] Lost Pratt through truss bridge over Patapsco River on Streetcar line (Baltimore Traction/Baltimore Transit)Removed but not replaced
Chesaco Avenue Bridge [Map] Girder bridge over Csx Railroad on Chesaco AvenueOpen to trafficBuilt 1957; rehabilitated 1988
CSX - Bridge 11 [Map] Stone arch bridge over Patapsco River Tributary on CSX RROpen to traffic
CSX - Gunpowder River Bridge [Map] Deck Warren truss bridge with bowed lower chord over Gunpowder River on CSX Transportation (former Baltimore & Ohio RR,)Open to trafficRebuilt by Baltimore & Ohio ca. 1906 as part of infrastructure upgrade at site of earlier bridge
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 trafficBuilt 1902 by the American Bridge Company; once carried 2 tracks
Cuba Road Bridge [Map · Street View] Through truss bridge over Western Run on Cuba RoadOpen to trafficBuilt 1893 by the Wrought Iron Bridge Co.; rehabilitated 1979
Deadman Run Bridge [Map] Girder bridge over Deadman Run on Mantua Mill RoadOpen to trafficBuilt 1930; rehabilitated 2001
Dover Road Bridge [Map] Lost wooden bridge over CSX Railroad on Dover RoadNo longer existsBuilt 1907; rehabilitated 1992; replaced 2006
Evna Rd Bridge [Map] Concrete stringer bridge over Bush Cabin Run on Evna RdOpen to traffic
Falls Road Bridge [Map] Through truss bridge over Gunpowder Falls on Falls RoadOpen to trafficBuilt 1884; rehabilitated 1994
Lake Roland Bridge [Map] Lost Through truss bridge over Jones Falls on RoadReplaced by a new bridgeBuilt 1872; replaced during WWII
Little Falls Bridge [Map] Girder bridge over Little Falls on Dairy RoadOpen to trafficbuilt ca. 1900, rehabilitated 2005
Masemore Road Bridge [Map] Through truss bridge over Gunpowder Falls on Masemore RoadOpen to trafficBuilt 1898; rehabilitated 2000
Matthews Bridge [Map] Lost Parker through truss bridge over Loch Raven Reservoir on MD-146 (Dulaney Valley Road)Replaced by new bridgeReplaced 1976, Demolished 1978.
Mohrs Lane Overpass [Map · Street View] Girder bridge over Csx Railroad on Mohrs LaneRemoved but not replacedBuilt 1912; rehabilitated 1989, closed June 2007, demolished March 2011 by CSX, to be replaced by new Campbell Blvd. Bridge ca. 2023 (originally 2016)
Old Paper Mill Bridge [Map · Street View] Steel through-arch bridge over Loch Raven Reservoir (Gunpowder Falls) on an old alignment of Paper Mill RdClosed to all trafficBuilt 1922; bypassed 2000; rehabilitated in 1968 and again as historic landmark in 2007
Old York Road Bridge [Map] Stone arch bridge over Little Falls on Old York Road (Md. 463)Open to pedestrians onlyBuilt 1809; believed to be oldest bridge on Maryland road system
Patapsco River Bridge [Map] Concrete arch bridge over Patapsco River on MD 144Open to trafficBuilt 1914; heavily damaged by Hurricane Agnes and rehabilitated 1972
Phoenix Road Bridge [Map · Street View] Lost deck truss bridge over Northern Central Rail-trail and Gunpowder Falls on Phoenix RoadConstruction began in June 2022 and is expected to take approximately 20 months to completeBuilt 1922; rehabilitated 1982
Prettyboy Dam Road Bridge [Map] Concrete arch bridge over Pretty Boy Resevoir on Prettyboy Dam RoadOpen to trafficBuilt 1932; rehabilitated 1998
Shallow Creek Street Car Bridge [Map] Lost Deck plate girder bridge over Shallow Creek on Bay Shore Street Car LineRemoved but not replacedThe Shallow Creek Bridge, from available materials, was a short lived extension of the Bay Shore Park Street Car and Trolley Service. Its section of the Bay Shore line ceased being in use in 1933 with the bridge being severely damaged by a hurricane.
Sparks Road Bridge [Map] Pratt through truss (with added arch) over Gunpowder Falls on Sparks RoadOpen to trafficBuilt 1888; rehabilitated 1990
Thistle Road Bridge [Map] Lost Concrete tee beam bridge over Patapsco River Tributary on Thistle RoadDestroyed by floodingBuilt 1920
Wise Avenue Bridge [Map] Bascule bridge over Bear Creek on Wise Avenue in DundalkOpen to trafficBuilt 1948; rehabilitated 1986
Yellott Bridge [Map] Lost Through truss bridge over Loch Haven Reservoir on Loch Haven DriveReplaced by a new bridgeBuilt 1914