UP GP60 2011 leads a empty rock train west through Oklahoma City en route to the Dolese Quarry at Richards Spur near Lawton. The diamond is a former Frisco spur into the Compress Cotton Gin which will be removed when I-40 is realigned in this area.

Twenty two years earlier, a different type of "Rock" train at the same location: http://www.railpictures.net/viewphoto.php?id=3027&nseq=1422