Columbia Railroad Bridge, also known as "Columbia Bridge", is a 1920 concrete arch bridge in Philadelphia, Pennsylvania, that carries CSX Trenton Subdivision rail lines over the Schuylkill River. Located in Fairmount Park, upstream of the Pennsylvania Railroad Connecting Bridge, it is the third railroad bridge at the site. Adjacent to its east abutment are the Schuylkill Grandstand (for viewing rowing regattas) and the John B.