Now owned by CSX.
Double track line.
POLK STREET
Electric pneumatic interlocking installed 1890
New electric pneumatic interlocking installed 1902
New tower constructed/electric interlocking installed 1949
Tower controlled movements at Grand Central Station, closed 1969. Also controlled Chicago River bridge immediately southwest from 1902 until 1930, when river was straightened and new drawbridge built at 16th Street. New tower constructed in 1949 was closer to Roosevelt Road.
SOUTH BRANCH CHICAGO RIVER
Electric pneumatic interlocking installed 1892
Out of service 1899
Separate interlocking later replaced with new consolidated interlocking at Polk Street.
16TH STREET BRIDGE
Electric interlocking installed 1930
STILL IN USE
Began use after Chicago River straightening project. South drawbridge continues in use for the St. Charles Air Line. While the north drawbridge, formerly enabling access to Grand Central Station, is no longer used. The south drawbridge actually was relocated from the previous river crossing of the St. Charles Air Line, and shortened slightly. That bridge had been built in 1919, replacing an earlier bridge built in 1882.
WESTERN AVENUE
Electric interlocking installed 1937
Former junction with Chicago & North Western Rockwell Subdivision.
26TH STREET DRAWBRIDGE
Mechanical interlocking installed 1893
Out of service around 1898
Little is known about this interlocking, including the actual location.
26TH STREET
The Baltimore & Ohio main line, the Pennsylvania Railroad Panhandle line paralleling to the west, and the Chicago Junction line paralleling to the east, crossed the Illinois Northern industrial line, running east to west. Or the three railroads crossing the Illinois Northern line, only the crossings with the Baltimore & Ohio tracks were interlocked. Only the Baltimore & Ohio line remains, now CSX, and the Chicago Junction line, now Norfolk Southern.
ASH STREET
Tower listed with Illinois Central
BRIGHTON PARK
Tower listed with New York Central
49TH STREET
Tower listed with Pennsylvania Railroad
75TH STREET
Mechanical interlocking installed 1894
Closed November 28, 1997, demolished October, 1998
Crossing of the CSX former Baltimore & Ohio line and the paralleling Pennsylvania Railroad Panhandle line, abandoned 1986, with the Metra Southwest line (former Wabash) and the Belt Railway of Chicago.
79TH STREET JCT.
Non interlocked switches controlled by switchtender
Junction where passenger line previously continued straight south, while freight line diverged west as present CSX route. Prior to 1920's, freight line diverged from passenger line at 75th Street. The passenger line used trackage rights over the Rock Island from Beverly Jct. east to South Chicago. Passenger trains were discontinued May 1, 1971, with the creation of Amtrak.
BEVERLY JCT. (Tower B)
Tower listed with Pennsylvania Railroad
BLUE ISLAND
Tower listed with Grand Trunk Western