Mountain Subdivision

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.

Mountain Subdivision
The yard in Grafton in November, 2009.
Overview
StatusActive
OwnerCSX Transportation
LocaleWest Virginia, Maryland
Termini
Service
TypeFreight rail
SystemCSX Transportation
Operator(s)CSX Transportation
Technical
Number of tracks2
Track gauge4 ft 8+1โ„2 in (1,435 mm) standard gauge
Route map

MP.0
A&OR Cowen Subdivision
281.6
Berkley Run Junction
280.2
D Tower
280.1
Grafton
279.0
Grafton Yard
274.7
267.4
262.0
261.1
260.3
258.1
Tunnelton defect detector
254.5
Rowlesburg
R&S RR
M&K RR
253.6
M & K Junction
237.7
233.4
231.9
229.5
216.2
Hitchcock Tunnel
208.5
208.26
208.25
207.8
WV Central Junction
207.6
206.5
203.1
Keyser Yard
201.6
200.5
Industrial Park
199.5
WM Trussle
198.9
Twenty First defect detector
194.9
Black Oak
191.5
189.9
Lowndes
187.0
185.2
Brady
183.1
179.6
Beall St.
178.9
Viaduct Junction

At its east end, the Mountain Subdivision becomes the Cumberland Terminal Subdivision at Beall Street. It junctions the Thomas Subdivision twice โ€“ near Keyser, West Virginia, and near Piedmont, West Virginia โ€“ 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.

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