I shot this old four axle high hood locomotive back in 2005 in Lavonia, Georgia. The heritage of the unit seemed pretty evident to me, former Chicago & Northwestern #4556, an EMD GP9. An online source I trust says it was actually biult in in 1957 as CRIP #1315, the Chicago, Rock Island and Pacific, better known as the Rock Island. (The Rock later renumbered it to #4485) It then went to the Chicago & Northwestern and became CNW 4556 before moving on to the Hartwell Railroad in Georgia as HRT #4556.