The Illinois Central Gulf Railroad (AAR designation ICG) was the result of the merger between the Illinois Central (IC) and the Gulf, Mobile and Ohio (GM&O) railroads.
The IllinoisCentralRailroad was chartered in 1851 to build a railroad from Cairo, Illinois, at the joining of the Ohio and Mississippi rivers, to Galena, in the extreme northwestern corner of the state (the "Old Main"), with a branch from Centralia (named for the railroad) to Chicago (the "Chicago Branch").
The NOJandGN and Mississippi Central were then reorganized in 1877 as the New Orleans, Jackson and Northern and the Central Mississippi, respectively, and then consolidated as the Chicago, St. Louis and New Orleans Railroad, a subsidiary of the IC.
In 1972 the IllinoisCentral merged with the parallel Gulf Mobile and Ohio to form IllinoisCentralGulf.
It was a failure, but in 1851 the state chartered the IllinoisCentralRailroad (IC) and selected a consortium of Eastern capitalists to construct and own the railroad.
The trunk of the railroad extended from the Mississippi River at Cairo northwest to the Mississippi opposite Dubuque, Iowa.
In 1972 the railroad merged with the Gulf, Mobile and Ohio Railroad to form the IllinoisCentralGulfRailroad (ICG).