First of its kind
Alvord Lake Bridge (San Francisco County, California)Built 1889 by Ernest L. Ransome
Reinforced concrete arch bridge over a pedestrian walkway at Golden Gate Park
Open to traffic
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 on CSX Transportation
Open to traffic
Dunlap's Creek Bridge (Fayette County, Pennsylvania)Built 1839; rehabilitated 1981
Cast-iron arch bridge over Dunlap Creek on PA 4003 in Brownsville
Open to traffic
Meramec River MO 21 Bridge (St. Louis County, Missouri)Built 1940
Steel through arch bridge over the Meramec River on MO 21
Open to four lanes of traffic
US 41/45 Pedestrian/Bicycle Overpass (Waukesha County, Wisconsin)Built 1970; First Cable-stayed bridge built in the United States
Cable-stayed bridge over US 41-US 45 on Water St. in Menomonee Falls
Open to pedestrians/bicycles