Now owned by CN.
COULTERVILLE
Mechanical interlocking installed 1905
Replaced with automatic interlocking 1956
Crossing with Missouri Pacific Sparta Subdivision.
PINCKNEYVILLE
Tower listed with Missouri Pacific
St. Louis-Coulterville-Du Quoin
Installed 1962, control machine in dispatcher's office in Carbondale
Completed 1963
Bluford-Metropolis
Installed 1961, control machine in dispatcher's office in Carbondale
The Bluford District was constructed in 1928, and had no interlocking towers.
Between 1968 and 1970, Illinois Central consolidated its dispatching systemwide to one office in Chicago. Illinois Central was the second major US railroad to achieve such consolidation, the first being St. Louis San Francisco in 1965.