The story
The BDRV right-of-way began as a segment of the original Belvidere Delaware Railroad, later controlled by the Pennsylvania Railroad (PRR), Penn Central (PC), and Conrail.
BDRV originally served the James River Paper plant in Milford, New Jersey, assuming the task from Conrail: service to the plant ended in July 2003 when the plant closed. Rail service to a lumber transload continued serving Milford into 2004 when service on this part of the line was finally terminated. Freight service to Corrugated Paper Group (now Georgia Pacific) in nearby Riegelsville, New Jersey terminated in 2005 when the firm switched from railroad to trucking for product shipment.
From Wikipedia’s article on Belvidere and Delaware River Railway, shared under CC BY-SA 4.0.4

