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Howard County

Bollman Bridge [Map]
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).

Deep Run Bridge [Map]
Concrete arch bridge over Deep Run on US 1
Open to traffic
Built 1929; rehabilitated 1955

Folly Quarter Road Bridge
Concrete arch bridge over Middle Patuxent River on Folly Quarter Road
Open to traffic
Built 1922

Frederick Road Bridge
Concrete arch bridge over Little Patuxent River on Frederick Road
Open to traffic
Built 1930

Ilchester Railroad Bridge [Map]
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

Little Patuxent River Bridge [Map]
Concrete arch bridge over Little Patuxent River on Southbound US 1 in Savage-Guilford
Open to traffic
Built 1900; rehabilitated 1929

Old Columbia Road Bridge
Concrete arch bridge over Middle Patuxent River on Old Columbia Road
Open to traffic
Built 1920

Patapsco River Bridge [Map]
Concrete arch bridge over Patapsco River on US 1 in Baltimore
Open to traffic
Built 1915; rehabilitated 1952

Patapsco River Bridge [Map]
Concrete arch bridge over Patapsco River on US 40 in Woodlawn
Open to traffic
Built 1936

Patapsco River Bridge [Map · Street View]
Through Truss bridge over Patapsco River on Hollifield Road
Open to traffic
Built 1934; rehabilitated 2005

Patuxent River Bridge near Scaggsville MD [Map]
Pratt through truss bridge over Patuxent River on Columbia Turnpike
Built in 1883 by Pittsburgh Bridge Company. Replaced by Rt 29 Bridge 1952

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

Twin Arch Road Bridge [Map]
Stone arch bridge over Twin Arch Road and South Branch Patapsco River on B&O RR
Open to traffic

Wilkins-Rogers Flour Mill Bridge [Map]
Pratt through truss bridge over Patapsco River on B&O Railroad
Intact but closed to all traffic
Built c1880s to replace earlier covered bridge built c1830