The Manayunk Bridge, an S-shaped former railroad bridge located at Pennsylvania, crosses over the Schuylkill River and the Schuylkill Expressway.
The Manayunk Bridge (also known as the Manayunk Viaduct, Pencoyd Viaduct, and Schuylkill River Railroad Bridge) is an S-shaped former railroad bridge over the Schuylkill River, Schuylkill Canal and Schuylkill Expressway, that connects Bala Cynwyd, Montgomery County and the Manayunk neighborhood of Philadelphia, Pennsylvania. 
Schuylkill River and Schuylkill Expressway Manayunk, Philadelphia, Pennsylvania Built by the former Schuylkill Valley Division of the Pennsylvania Railroad, it is a large concrete open spandrel arch bridge built in an "S curve," earning both the current concrete bridge and its 1883 wrought-iron-truss predecessor the nickname of "S-Bridge." 
