Old Main Line Subdivision

Old Main Line Subdivision
train on the line
Eastbound coal train on the Old Main Line Subdivision at Monrovia in 2011
Overview
Statusoperational
LocaleMaryland, USA
Service
SystemCSX Transportation
Technical
Track gauge4 ft 8+12 in (1,435 mm) standard gauge
Old Main Line in 1917

in 1917
0.0
Relay
2.5
Orange Grove
3.2
3.5
Ilchester Bridge
3.6
Ilchester
4.4
Lees
4.7
Gray
5.7
Ellicott City
6.2
Sucker Branch Bridge
7.9
Union Dam Tunnel
9.2
HS Tower
9.5
Hollofield
10.6
Daniels Bridge
10.9
Alberton
11.6
Brice Run Bridge
12.1
Dorsey’s Run Tunnel
12.7
Eureka Bridge
12.8
Line Run Bridge
12.9
Davis Tunnel
13.3
Davis
13.8
Davis Branch Bridge
14.6
Woodstock
17.1
Marriottsville
17.7
Henryton Bridge
17.8
17.9
Henryton
19.7
Gorsuch
21.6
Sykesville Station
22.4
Sykesville Tunnel
22.9
24.2
Hood’s Mill
26.1
Morgan
26.5
Woodbine Tunnel
26.8
Woodbine
26.9
Gillis Falls Bridge
29.5
Watersville
30.6
Watersville Junction
31.8
Mount Airy
32.6
Mount Airy Tunnel
33.9
Mount Airy Junction
37.4
Bush Creek Bridge
39.5
Monrovia
40.0
Monrovia Tower
42.9
Ijamsville
44.1
Hartman Tunnel
46.1
Reel’s Mill
47.4
47.5
Frederick Junction
43.5
Frederick
(South Market Street)
48.9
50.0
Lime Kiln
51.7
Buckeystown
53.7
Adamstown
53.9
Adamstown Junction
Adamstown Cutoff
58.0
Point of Rocks
Washington Junction
58.5
Point of Rocks Tunnel
60.1
Catoctin Tunnel
Ellicott City Station, built 1830, is the oldest surviving passenger station in the United States. Photo taken in 1970, looking south towards Baltimore.

The Old Main Line Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. state of Maryland. The line runs from Relay (outside Baltimore) west to Point of Rocks, and was once the main line of the Baltimore and Ohio Railroad, one of the oldest rail lines in the United States. At its east end, it has junctions with the Capital Subdivision and the Baltimore Terminal Subdivision; its west end has a junction with the Metropolitan Subdivision.[1][2]

  1. ^ "OM-Old Main Line Sub". The RadioReference Wiki.[user-generated source?]
  2. ^ "CSX Baltimore Division Timetable" (PDF). MultimodalWays.