drawbridges:
Philadelphia Naval Shipyard Bridge
drawbridges:
Philadelphia Baltimore & Washington Railroad Bridges
drawbridges:
Grays Ferry Railroad Bridge
drawbridges:
Chester & Delaware River Railroad Bridge
drawbridges:
New Jersey Atlantic City Line Railroad Bridge
drawbridges:
New Jersey Atlantic City Line Railroad Bridge
drawbridges:
Bristol Bridge
drawbridges:
Csx Railroad Bridge
drawbridges:
B&O Schuylkill River Railroad Bridge
drawbridges:
University Avenue Bridge
drawbridges:
Tacony Palmyra Bridge
drawbridges:
South Street Bridge