On the point of this tank car train is First Union Rail (FURX) 3042, with an ex-Conrail unit. The train is heading north on Union Pacific's Chester Subdivision at Chalfin Bridge, IL . This curve at Chalfin Bridge is a popular spot, at least to me, along the Chester Subdivision, due to the rest of the subdivision being very straight between here and Dupo, IL. (Dupo is approximately twenty-three miles to the north of here). Counting this curve, there are three curves in the rail line between Chalfin Bridge and Dupo. If you take a look at this map at Open Railway Map , you can see that long portions of the Chester Subdivision stretch for miles without a curve. The rail line is also very flat, since it runs through the Mississippi River Valley, through southern Illinois. Update (2019-10-31): First Union Rail was a locomotive and rail car leasing company. In 2015, FURX was purchased by Wells Fargo, and was renamed Wells Fargo Rail. Photo taken: November 12, 2005, at Chalf...