The Mountain Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Maryland and West Virginia. The line runs from Cumberland, Maryland, west to Grafton, West Virginia, along the original Baltimore and Ohio Railroad (B&O) main line. It was known as the West End Subdivision until the B&O's absorption into the Chessie System, and included the B&O's original crossing of the Allegheny Mountains. Through CSX traffic to the west from Cumberland now uses the Keystone Subdivision over Sand Patch Grade.
The Keystone Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Maryland and Pennsylvania. The line runs from Cumberland, Maryland, west to McKeesport, Pennsylvania, along a former Baltimore and Ohio Railroad (B&O) line. The line includes the well-known Sand Patch Grade over the Allegheny Mountains.
The Illinois Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Indiana and Illinois. The line runs from Washington, Indiana, west to East St. Louis, Illinois, along a former Baltimore and Ohio Railroad line.
The Indiana Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Ohio and Indiana. The line runs from Cincinnati, Ohio, west to Washington, Indiana, along a former Baltimore and Ohio Railroad line.
The Fairmont Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of West Virginia. The line runs from Grafton northwest to Rivesville along the old Baltimore and Ohio Rail Road main line and a former branch of it.
The CSX Cumberland Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Maryland and West Virginia. The line runs from Brunswick, Maryland, west to Cumberland, Maryland, along the old Baltimore and Ohio Rail Road (B&O) main line. At its east end, the Cumberland Subdivision becomes the Metropolitan Subdivision; at its west end at Cumberland, Maryland it becomes the Cumberland Terminal Subdivision. It meets the Shenandoah Subdivision at Harpers Ferry, West Virginia, and the Lurgan Subdivision in Cherry Run, West Virginia.
The Willard Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of Ohio. The line runs from Willard west to Deshler along a former Baltimore and Ohio Railroad (B&O) line. At its east end, at Daniels Road west of Willard, the line becomes the Willard Terminal Subdivision. Its west end is at the east end of the Garrett Subdivision, just east of Deshler and the Toledo Subdivision. The line is split at Fostoria by the Fostoria Subdivision, which includes the junction with the Columbus Subdivision, and at Galatea the line intersects the Toledo Branch Subdivision. This was once Amtrak's Three rivers line.
The Short Line Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of West Virginia. The line runs from Clarksburg west to New Martinsville along a former Baltimore and Ohio Rail Road line. Its east end is at the west end of the Bridgeport Subdivision; its west end is at the Ohio River Subdivision.
The Marietta Subdivision is a railroad line owned by CSX Transportation and operated by Belpre Industrial Parkersburg Railroad in the U.S. states of West Virginia and Ohio. The line runs from Parkersburg, West Virginia, west to Belpre, Ohio, and north via Marietta to Relief along a former Baltimore and Ohio Rail Road line. Its south end is at a connection to the Ohio River Subdivision; the line crosses the Ohio River on the Parkersburg Bridge between Parkersburg and Belpre.
The Alleghany Subdivision is a railroad line owned by CSX Transportation in the U.S. states of Virginia and West Virginia. It was formerly part of the CSX Huntington East Division. It became part of the CSX Florence Division on June 20, 2016. The line runs from Clifton Forge, Virginia, to Hinton, West Virginia, for a total of 78.6 miles (126.5 km). At its north end it continues south from the James River Subdivision and at its south end it continues south as the New River Subdivision.
The Big Marsh Fork Subdivision is a railroad line owned by CSX Transportation in the U.S. State of West Virginia. It was formerly part of the CSX Huntington East Division. It became part of the CSX Florence Division on June 20, 2016. At its south end it continues north from the Big Coal Subdivision and at its north end the track comes to an end.
The Coal River Subdivision is a railroad line owned by CSX Transportation in the U.S. State of West Virginia. It was formerly part of the CSX Huntington East Division. It became part of the CSX Florence Division on June 20, 2016. The line runs from Sharples, West Virginia, to St. Albans, West Virginia, for a total of 50.6 miles (81.4 km). At its north end it continues south from the Beech Creek Industrial Track and at its south end it continues south as the Kanawha Subdivision.
The Cabin Creek Subdivision is a railroad line owned by CSX Transportation in the U.S. State of West Virginia. It was formerly part of the CSX Huntington East Division. It became part of the CSX Florence Division on June 20, 2016. The line runs from Cabin Creek, West Virginia, to Red Warrior, West Virginia, for a total of 12.2 miles. At its north end it continues south from the Kanawha Subdivision and at its south end the track comes to an end.
The G&E Subdivision is a railroad line owned by CSX Transportation in the U.S. State of West Virginia. It was formerly part of the CSX Huntington East Division. It became part of the CSX Florence Division on June 20, 2016. The line runs from Rainelle, West Virginia, to Peaser Junction for a total of 14.2 miles (22.9 km). At its south end it intersects with the Sewell Valley Subdivision and at its north end the main track ends.
The Gauley Subdivision is a railroad line owned by CSX Transportation in the U.S. states of West Virginia and Virginia. It was formerly part of the CSX Huntington East Division. It became part of the CSX Florence Division on June 20, 2016.
The New River Subdivision is a railroad line owned by CSX Transportation in the U.S. state of West Virginia. It was formerly part of the CSX Huntington East Division. It became part of the CSX Florence Division on June 20, 2016.
The Sewell Valley Subdivision is a railroad line owned by CSX Transportation in the U.S. state of West Virginia. It was formerly part of the CSX Huntington East Division. It became part of the CSX Florence Division on June 20, 2016.
The Seth Subdivision is a railroad line owned by CSX Transportation in the U.S. state of West Virginia. It was formerly part of the CSX Huntington East Division. It became part of the CSX Florence Division on June 20, 2016. The line runs from Seth, West Virginia, to Prenter, West Virginia, for a total of 10.2 miles (16.4 km). At its north end the line wye's off of the Big Coal Subdivision and at its south end the track comes to an end.
The West Fork Subdivision is a railroad line owned by CSX Transportation in the U.S. state of West Virginia. It was formerly part of the CSX Huntington East Division. It became part of the CSX Florence Division on June 20, 2016. The line runs from Van, West Virginia, to Twilight, West Virginia, for a total of 8.5 miles (13.7 km). At its north end the line continues south from the Pond Fork Subdivision and at its south end the track comes to an end.
The Thomas Subdivision is a railroad line owned by CSX Transportation in the U.S. states of Maryland and West Virginia. The line runs from Rawlings, Maryland, to Bayard, West Virginia, for a total of 44.2 miles (71.1 km). At its east end the line continues west from the Mountain Subdivision and at its west end the line comes to an end.
