High Quality Content by WIKIPEDIA articles! The Ironton Railroad was a shortline railroad in Lehigh County, Pennsylvania. Originally built in 1861 to haul iron ore and limestone to blast furnaces along the Lehigh River, traffic later shifted to carrying Portland cement when local iron mining declined in the early 20th century. Much of the railroad had already been abandoned when it became part of Conrail in 1976, and the last of its trackage was removed in 1984.