National Historic Landmark

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Blenheim Bridge (Schoharie County, New York)
Built 1855; Approach span added 1869; Approach span rebuilt 1887 & 1895; bypassed 1932; lost 2011
Lost covered bridge over Schoharie Creek on River Road
Destroyed by flooding from Hurricane Irene on Aug 28, 2011

Bollman Bridge (Howard County, Maryland)
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).
Bollman through truss bridge over Little Patuxent River in Savage, near the intersection of Goman Road and Foundry Street
Open to pedestrians

Brooklyn Bridge (Kings County, New York)
Opened to traffic May 24, 1883
Suspension bridge over East River between Manhattan and Brooklyn in New York
Open to traffic

Brown Covered Bridge 45-11-09 (Rutland County, Vermont)
Built 1880 by Nichols Powers
Covered bridge over Cold River on Upper Cold River Road in Shrewsbury
Open to one lane traffic

Cabin John Aqueduct Bridge (Montgomery County, Maryland)
Built 1853-63 to carry Washington Aqueduct; rehabilitated 2001
Stone arch bridge over Cabin John Creek on Macarthur Blvd.
Open to traffic

CSX - Carrollton Viaduct (Baltimore, Maryland)
Built in 1829 for the Baltimore and Ohio Railroad, this is the oldest railroad bridge in the world still in use.
Stone arch bridge over Gwynn's Falls
Open to traffic

Delaware Aqueduct (Pike County, Pennsylvania)
Built 1848 by John A. Roebling to carry the Delaware & Hudson Canal; later converted for highway traffic; rehabilitated 1985
Suspension bridge over Delaware River on the former Delaware & Hudson Canal
Open to one-lane traffic

Eads Bridge (St. Louis, Missouri)
Built 1869-1874 under the direction of engineer James Buchanan Eads; automobile deck closed 1989 - 2003 for rehabilitation and replacement; reopened July 4, 2003
Three-span steel arch bridge over the Mississippi River and N. Leonor K. Sullivan Blvd. in downtown St. Louis
Top deck open to four lanes of traffic with a pedestrian lane, bottom deck open to two tracks of MetroLink light rail service

Edmund Pettus Bridge (Dallas County, Alabama)
Built 1940
Steel through arch bridge over Alabama River on US 80 in Selma
Open to traffic

Eldean Covered Bridge 35-55-01 (Miami County, Ohio)
Built 1860; rehabilitated 1980
Two-span covered bridge over Miami River on Farver Road (formerly Eldean Road)
Open to traffic

Mission Espada Aqueduct (Bexar County, Texas)
Built between 1731 and 1745
Stone arch bridge over Piedras Creek on Acequia Madre
Still carries water

Natural Bridge (Rockbridge County, Virginia)
Naturally formed bridge, Built c.150,000,000 BCE, that carries Rt. 11 over Cedar Creek
Arch bridge over Cedar Creek on South Lee Hway (Rt. 11)
Open to traffic

Roebling Suspension Bridge (Hamilton County, Ohio)
Built 1866 by John A. Roebling. Rehabilitated 1955.
Suspension bridge over the Ohio River between Cincinnati and Covington
Rehabilitation Completed

Smithfield Street Bridge (Allegheny County, Pennsylvania)
Built 1883 under the direction of engineer Gustav Lindenthal
Two-span lenticular through truss bridge over Monongahela River on Smithfield Street in Pittsburgh
Open to four lanes of traffic

West Union Covered Bridge 14-61-27 (Parke County, Indiana)
Built 1876, bypassed in 1964
Covered bridge over Sugar Creek on CR525W north of West Union
Open to pedestrians only

Wheeling Suspension Bridge (Ohio County, West Virginia)
Built 1849; collapsed May 17, 1854; temporary bridge reopened July 26, 1854; permanent bridge reopened July 1860; improvements made 1871-72, 1886, 1922, 1930, 1956 and other years
Suspension bridge over Ohio River on WV 251 in Wheeling
Open to traffic