Steel mill
Through its Transtar subsidiary, U.S. Steel also owned other railroads that served its mines and mills. Those properties included the Duluth, Missabe &amp; Iron Range Railway in the iron-mining region of northeast Minnesota; the Elgin, Joliet &amp; Eastern that served its Gary Works in northwest Indiana; the Birmingham Southern Railroad serving the U.S. Steel mill in Birmingham, Alabama; and the Bessemer &amp; Lake Erie and Union railroads in western Pennsylvania that delivered iron ore and provided plant-switching services at its mill complex in Braddock, Pennsylvania and coke works in Clairton, Pennsylvania.