The line ran from Arsenal Interlocking in West Philadelphia southeast, south, east and north to the intersection of Delaware Avenue (now Columbus Boulevard) and Dock Street.
[1] The line from Arsenal to Greenwich Yard on the Delaware River is now part of CSX Transportation's Harrisburg Subdivision.
[2] Construction began on the first piece of the line, from Arsenal (then on the West Chester and Philadelphia Railroad) over the Arsenal Bridge to Washington Avenue west of 25th Street (then on the Philadelphia, Wilmington and Baltimore Railroad's main line), in 1860.
[3] The PRR acquired trackage rights over the WC&P from their main line at Market Street south to Arsenal in exchange for building a second track to handle the increased traffic.
[7] It was extended further south along 25th Street and east along the current Schuylkill Expressway alignment to the Delaware River at Greenwich Point in March 1866, giving the PRR its own port.