Polygonal Warren pony truss with no verticals

Abandoned MD 36 Bridge (Garrett County, Maryland)
Abandoned polygonal Warren pony truss with no verticals bridge over North Branch Potomac River on Abandoned Maryland 36
Derelict/abandoned

Conrail Railroad Bridge (Monroe County, Pennsylvania)
Built 1932
Pony truss bridge over Conrail Railroad on PA 2024 in East Stroudsburg
Open to traffic

Erie Canal Bridge (Saratoga County, New York)
Built 1907; rehabilitated 2004
Pony truss bridge over Erie Canal on NY 32 in Waterford
Open to traffic

Linfield Bridge (Chester County, Pennsylvania)
Built 1932; rehabilitated 1970
Pony truss bridge over Schuylkill River on Linfield Rd. (Main St.)
Open to traffic