The Barr Subdivision is a railroad line owned and operated by CSX Transportation in the U.S. states of Indiana and Illinois. The line runs from Willow Creek (a neighborhood in Portage, Indiana), west to Blue Island, Illinois,[1] along a former Baltimore and Ohio Railroad (B&O) line. At its east end, it junctions with the Porter Subdivision and Garrett Subdivision; its west end is at the south end of the Blue Island Subdivision, with access to the New Rock Subdivision via trackage rights over the Metra Rock Island District and access to the Indiana Harbor Belt Railroad. Junctions exist with the Lake Subdivision at Pine Junction in Gary, Indiana and with the Chicago Heights Subdivision at Harvey Junction (near Blue Island).
The line east of Pine Junction was opened by the Baltimore, Pittsburgh and Chicago Railway in 1874.[2] From Pine Junction west to Blue Island, the Chicago and Calumet Terminal Railway built a line in the late 1880s. Both sections became part of the B&O and CSX through leases and mergers.