Atchison, Topeka & Santa Fe (AT&SF) 1859 - 1996 - merger with Burlington Northern Railroad.
Baltimore and Ohio (B&O) 1830 - 1987 merger in to CSX.
Conrail (CR) 1976 -
Louisville & Nashville Railroad (L&N) 1850 - 1982 - merger in to CSX.
Pennsylvania Railroad (PRR) 1846 - 1968 merger with New York Central and split in to Amtrak, Conrail in 1970 in 1999 Norfolk Southern Railway took over the PRR track network.
