Double track line.
Junction with Union Pacific former Chicago & Alton and New York Central paired track, and Wabash Brooklyn District.
SH TOWER (Madison)
Electric interlocking installed 1904
Closed 1984
Junction with Illinois Transfer Subdivision, and with Eastern Connection connecting with Nickel Plate and Chicago & North Western in Madison.
WEST APPROACH
Mechanical interlocking installed
Tower destroyed by accident 1960
Subsequently remotely controlled by CTC dispatcher
West end Merchants Bridge, junction with West Belt Subdivision.
NORTH MARKET STREET
Electric interlocking installed
Closed around 1964, remotely controlled by CTC dispatcher
Junction with Burlington Hannibal Subdivision.
MULLANPHY STREET
Electric interlocking installed
Closed around 1964, remotely controlled by CTC dispatcher
Access to St. Louis Southwestern freight house.
BIDDLE STREET
Electric interlocking installed
Closed 1964, remotely controlled by CTC dispatcher
Access to freight yard and Burlington Route freight house.
GRATIOT STREET
Tower listed with Terminal Railroad Association (MacArthur Subdivision)
TOWER 3 (14th Street)
Electric pneumatic interlocking installed 1904
Closed 1956, remotely controlled from ID Tower
Tower controlled movements at east leg of Union Station wye. Junction with Eads Subdivision.
TOWER 2 (23rd Street)
Electric pneumatic interlocking installed 1904
Closed 1980's, remotely controlled by CTC dispatcher
Tower controlled movements at west leg of Union Station wye.
TOWER 1 (Union Station)
Interlocking installed 1894
Electric pneumatic interlocking installed 1904
Interlocking replaced 1940 after tower burned
Closed 1978
Tower controlled immediate Union Station area.
GRAND AVENUE
Mechanical interlocking installed 1896
Electric interlocking installed 1955
Closed 1986
Interlocking actually operated by Missouri Pacific. Junction with Missouri Pacific, St. Louis San Francisco, and Wabash Moberly Division.