The Delaware River Viaduct is a reinforced concrete railroad bridge across the Delaware River about two miles (3.2 km) south of the Delaware Water Gap in Pennsylvania and New Jersey, United States. It was built from 1908 to 1910 as part of the Lackawanna Cut-Off rail line. It is the sister to the line's larger Paulinskill Viaduct. The Delaware River Viaduct also crosses Interstate 80 on the east side of the river and Slateford Road and the Lackawanna Railroad's "Old Road" on the west (Pennsylvania) side. Abandoned in 1983, it is part of an Amtrak proposal to introduce passenger service between Scranton, Pennsylvania and New York City, a distance of 135 mi (217 km).