B&O EMD GP9 6439 rounds a curve with a Baltimore & Ohio Chicago Terminal transfer run from the Indiana Harbor Belt's Blue Island Yard on March 8, 1970. David V. Leonard captured this view from the West 139th Street viaduct in Blue Island, Illinois. The unit was delivered in 1955 as No. 689 and, after renumbering, eventually received the Chessie System livery. It was photographed as late as 1986, but information is elusive concerning its eventual disposition or whether it passed into the CSX roster.