Patapsco River

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BO - Lower Elysville Bridge (1838) (Howard County, Maryland)
Built 1838
Lost Bridge over Patapsco River on B&O Railroad
No longer exists

BO - Lower Elysville Bridge (1853) (Howard County, Maryland)
Built 1853 lost 1868 due to flooding. Replaced by a bridge of similar design but with an additional span.
Lost Bollman through truss bridge over Patapsco river on BO Railroad
No longer exists

BO - Lower Elysville Bridge (1868) (Howard County, Maryland)
Built 1868
Lost Bollman through truss bridge over Patapsco river on B&O Railroad
No longer exists

BO - Patterson Bollman Bridge (Howard County, Maryland)
Built 1869 atop washed-out ruins of Patterson Viaduct, replaced 1902-03 by line realignment
Lost Bollman through truss bridge over Patapsco River on Former Baltimore & Ohio Railroad
Replaced by a new bridge

BO - Patterson Viaduct (Howard County, Maryland)
Built May-December 1829, washed out 1868 and replaced with Bollman truss until 1902-03; one arch and abutments remain
Abandoned stone arch bridge over Patapsco River on Baltimore & Ohio Railroad
Derelict/abandoned

BO - Upper Elysville Bridge (1838) (Howard County, Maryland)
Built 1838
Lost Bridge over Patapsco river on B&O Railroad
No longer exists

BO - Upper Elysville Bridge (1854) (Howard County, Maryland)
Built beginning in 1853, opened in1854
Lost Bollman through truss bridge over Patapsco river on B&O Railroad
No longer exists

BO - Wilkins-Rogers Flour Mill Bridge (Baltimore County, Maryland)
Built c1880s to replace earlier covered bridge built c1830
Pratt through truss bridge over Patapsco River on B&O Railroad
Intact but closed to all traffic since 1972 flooding

BTCO - Patapsco River Bridge (Howard County, Maryland)
Lost Pratt through truss bridge over Patapsco River on Streetcar line (Baltimore Traction/Baltimore Transit)
Removed but not replaced

CSX - Patapsco River Bridge (Baltimore County, Maryland)
Built 1902 by the American Bridge Company; once carried 2 tracks
Through truss bridge over Patapsco River, Ilchester Road on CSX Railroad (formerly B&O Railroad Old Main Line)
Open to traffic

CSX - Thomas Viaduct (Howard County, Maryland)
Built 1835
Eight-span stone arch bridge over Patapsco River on the B&O Railroad between Relay and Elkridge
Open to traffic

CSX - Twin Arch Road Overpass (Carroll County, Maryland)
Stone arch bridge over Twin Arch Road and South Branch Patapsco River on B&O RR
Open to traffic

Ellicott City Covered Bridge 20-03-09#3x/20-13-06#2x (Howard County, Maryland)
Built 1868; Burned 1914
Lost Through truss bridge over Patapsco River on Main Street
Destroyed by fire

Francis Scott Key Bridge (Baltimore, Maryland)
Built 1976
Steel through arch bridge over Patapsco River/Baltimore Harbor on Maryland Route 695 (Interstate 695)
Open to traffic

Hanover Street Bascule Bridge (Baltimore, Maryland)
Built 1916; rehabilitated 1971 and 1992
Bascule bridge over Middle Branch of Patapsco River on Hanover Street in Baltimore
Open to traffic

Orange Grove Swinging Bridge (Baltimore County, Maryland)
Wire suspension bridge over Patapsco River on Footpath
Open to pedestrians only

Patapsco River Bridge (Baltimore County, Maryland)
Built 1934; rehabilitated 2005
Through Truss bridge over Patapsco River on Hollifield Road
Open to traffic

Patapsco River Bridge (Baltimore County, Maryland)
Built 1914; heavily damaged by Hurricane Agnes and rehabilitated 1972
Concrete arch bridge over Patapsco River on MD 144
Open to traffic

Patterson Viaduct Pedestrian Bridge (Baltimore County, Maryland)
Built 2006
Cable-stayed bridge over Patapsco River on Pedestrian pathway
Open to pedestrians only

US40 Patapsco River Bridge (Baltimore County, Maryland)
Built 1936; reconstructed using original arches 2014
Concrete arch bridge over Patapsco River on US 40 in Woodlawn
Open to traffic