A group of “more elderly” BNSF locomotives gather at the railroad’s 23rd Street locomotive facility in Denver, Colorado, on May 14, 2017. Besides SD40-2s, there is GP39-3 No. 2549 (a rebuilt GP30, but looks little like as original) and GE B40-8 No. 573. There were over a dozen SD40-2s at the terminal this day.