Now owned by Union Pacific.
Double track, except for two single track segments which received early CTC installations, described below. It is possible that these CTC installations eliminated the various mechanical interlockings installed in 1911.
NORTH DUPO (North Jct.)
Mechanical interlocking installed 1906
Closed 1966, remotely controlled from South Dupo yard office
North end Dupo Yard, and crossing and junction with several present and former railroads in East St. Louis area.
BIXBY (Milstadt Jct.)
Mechanical interlocking installed 1902
Closed 1971, remotely controlled by CTC dispatcher
Former crossing with Gulf Mobile & Ohio, abandoned 1990's.
FLINTON
Mechanical interlocking installed 1911
Interlocking at north end of a single track segment.
ROOTS
Mechanical interlocking installed 1911
Little is known about this interlocking, other than this was the south end of a siding extending north to Flinton.
CHESTER
Mechanical interlocking installed 1911
Junction with Pinckneyville Subdivision.
RADDLE
Mechanical interlocking installed 1911
Interlocking at south end of a single track segment.
GORHAM
Automatic interlocking installed 1930
Junction with Mt. Vernon Subdivision, and former crossing with Illinois Central Murphysboro District, abandoned by 1980's.
HOWARDTON
Mechanical interlocking installed 1911
Interlocking at north end of a single track segment.
HALSEY
Mechanical interlocking installed 1911
Interlocking at south end of a single track segment.
Former crossing of Missouri Pacific Ferry Line with Gulf Mobile & Ohio.
Howardton-Halsey
Installed 1926, control machine at Halsey tower
Replaced 1952 with expanded control machine in Chester
Likely an early simple CTC installation, involving a single track segment between Howardton and Halsey.
Flinton-Raddle Jct.-Gale
Installed 1938, control machine in dispatcher's office in Chester
Control machine expanded 1952
CTC on single track segment on what otherwise was a double track line.
Valley Jct.-North Dupo
Installed 1946, control machine at North Dupo tower