Port of Chicago, Proviso Yard and Joliet. The railroad's primary businesses are coal and steel. The coal is delivered to the Michigan City and Burns Harbor generating stations owned by Northern Indiana Public Service Company. The railroad also serves many customers along the line. Notes References External links South Shore Line Companies based in Indiana Michigan City, Indiana Indiana railroads Illinois railroads Standard gauge railways in the United States Transportation in Lake County, Indiana Transportation in LaPorte County, Indiana Transportation in Porter County, Indiana Transportation in St. Joseph County, Indiana Transportation in South Bend, Indiana American companies established in 1925 Railroads in the Chicago metropolitan area Transportation in Cook County, Illinois Transportation in Will County, Illinois