Complex sentence: The line was built with the backing of the Camden and Amboy Railroad from Camden to Glassboro, with the first 8.2 miles of the line using the abandoned built by the Camden and Woodbury Railroad to Woodbury.
Split into simpler sentences: The line was built with the backing of the Camden and Amboy Railroad from Camden to Glassboro. The first 8.2 miles of the line using the abandoned right of way (ROW) built by the Camden and Woodbury Railroad to Woodbury.