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 Bridgeport Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of West Virginia. The line runs from Grafton west to Clarksburg along a former Baltimore and Ohio Rail Road line. At its east end, the Bridgeport Subdivision becomes the Mountain Subdivision; its west end is at the Short Line Subdivision.
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 Kanawha Subdivision is a railroad line owned by CSX Transportation in the U.S. states of West Virginia and Kentucky. 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 Montgomery, West Virginia, to Russell, Kentucky, for a total of 94.7 miles (152.4 km). At its east end it continues west from the New River Subdivision and at its west end it continues west as the Russell Terminal Subdivision of the Louisville Division.
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 line runs from Hinton, West Virginia, to Montgomery, West Virginia, for a total of 72.9 miles. At its south end it continues north from the Alleghany Subdivision and at its north end it continues north as the Kanawha Subdivision.
The Rivanna Subdivision is a railroad line owned by CSX Transportation in the U.S. state of 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 Richmond, Virginia, to Gladstone, Virginia, for a total of 119.2 miles. From its eastern terminus in Richmond, the line continues east as the Peninsula Subdivision and at its west end the line continues west as the James River Subdivision.
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 line runs from Meadow Creek, West Virginia, to Nallen, West Virginia, for a total of 43.6 miles. At its south end the line wye's off of the New River Subdivision and at its north end the track comes to an end.
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. 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 EK Subdivision is a railroad line owned by CSX Transportation in the U.S. State of Kentucky. The line runs from Winchester, Kentucky, to Hazard, Kentucky, for a total of 117.5 miles (189.1 km). At its north end the line continues south from the CC Subdivision and at its south end the line continues south as the Rockhouse Subdivision.
The Rockhouse Subdivision is a railroad line owned by CSX Transportation in the U.S. state of Kentucky. The line runs from Hazard, Kentucky, to Deane, Kentucky, for a total of 43.7 miles (70.3 km). At its west end the line continues east from the EK Subdivision and at its east end the line continues east as the E&BV Subdivision
The Cincinnati Subdivision is a railroad line owned by CSX Transportation in the U.S. State of Kentucky. The line runs from South Shore, Kentucky to Silver Grove, Kentucky for a total of 107.2 miles (172.5 km). At its south end the line continues north from the Northern Subdivision and at its north end the line continues north as the Cincinnati Terminal Subdivision.
The Stony River Subdivision is a railroad line owned by CSX Transportation in the U.S. state of West Virginia. The line is located in Bayard, West Virginia, for a total of 16.7 miles (26.9 km). At its north end the line connects with the Thomas Subdivision and at its south end the line 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.
