 By 2006, the companies noted above had consolidated to CSX Transportation, which has lines to Birmingham and Brookwood; and the Norfolk Southern Railway, with lines to Birmingham, Mobile and New Orleans; Birmingham Southern continues in service.A major railroad feature is the "High Line", constructed by Tennessee Coal & Iron (predecessor to U.S. Steel) to ship iron ore from the mines on the city's south side to the steel works in nearby Fairfield.This elevated line traverses the eastern side of the city.