Mountain Subdivision

{{Short description|Railway line in Maryland and West Virginia}}

{{For|the railroad line in New England|Mountain Division}}

{{Use American English|date=February 2025}}

{{Infobox rail line

| box_width =

| name = Mountain Subdivision

| image = File:A Quiet Saturday Afternoon in Grafton, WV (4151817782).jpg

| image_width = 300px

| caption = The yard in Grafton in November, 2009.

| type = Freight rail

| system = CSX Transportation

| status = Active

| locale = West Virginia, Maryland

| start = Grafton

| end = Cumberland

| stations =

| open =

| close =

| owner = CSX Transportation

| operator = CSX Transportation

| linelength =

| tracks = 2

| gauge = {{RailGauge|ussg|allk=on}}

| electrification =

| speed =

| map = {{Mountain Subdivision}}

| map_state =

}}

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,CSX Transportation, Huntington, WV. [http://modernrailroading.com/DigitalLibrary/CSX/Huntington%20East%201-1-2005.pdf "Mountain Subdivision."] {{webarchive|url=https://web.archive.org/web/20110322074848/http://modernrailroading.com/DigitalLibrary/CSX/Huntington%20East%201-1-2005.pdf |date=2011-03-22 }} Huntington East Division, Timetable No. 1. Effective 2005-01-01. 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.mtnsub.org. [http://mtnsub.org/mountain/ "The Mountain Subdivision."] Railfanning the B&O Around Cumberland, MD. Accessed 2010-08-11.

At its east end, the Mountain Subdivision becomes the Cumberland Terminal Subdivision at Beall Street. It junctions the Thomas Subdivision twice – near Keyser, West Virginia, and near Piedmont, West Virginia – and meets the Fairmont Subdivision near its west end at Grafton. At its west end, it continues as the Bridgeport Subdivision. The Mountain Subdivision's summit is at Altamont, Maryland, at the west end of the Seventeen Mile Grade; the grade's east end is at Piedmont, West Virginia.[http://www.wvrail.railfan.net/westend.html "CSX's Mountain Subdivision."] {{Webarchive|url=https://web.archive.org/web/20060430031324/http://www.wvrail.railfan.net/westend.html |date=2006-04-30 }} Northern West Virginia's Railroads. Accessed 2010-08-11. {{Cite web|url=http://wiki.radioreference.com/index.php/MT-Mountain_Sub|title = MT-Mountain Sub - the RadioReference Wiki}} http://www.multimodalways.org/docs/railroads/companies/CSX/CSX%20ETTs/CSX%20Huntington%20Div%20East%20ETT%20%231%201-1-2005.pdf CSX Huntington East Division Timetable