Historic Bridges of the U.S.

Conemaugh River Bridge (Indiana County, Pennsylvania)
Built 1933; rehabilitated 1980
Through truss bridge over Conemaugh River on PA 56
Open to traffic

Crooked Creek Bridge (Indiana County, Pennsylvania)
Built 1929
Pony truss bridge over Crooked Creek on PA 56 in Shelocta
Open to traffic

Seward Bridge (Westmoreland County, Pennsylvania)
Built 1930 by American Bridge Co.; rehabilitated ca. 1985
Pony truss bridge over Conrail on PA 56
Open to traffic

Vandergrift Bridge (Westmoreland County, Pennsylvania)
Built 1933; rehabilitated 1988
Through truss bridge over Kiskiminetas River on PA 56 in East Vandergrift
Open to traffic