BNSF Railway train Z-CHCDEN9-10 (Priority UPS-LTL Intermodal; Chicago IL - Denver CO) rushes across Camp Creek. Behind the usual BNSF power (ES44C4 8039, ES44C4 6956, ES44DC 7283 and Dash 9-44CW 4659) are found General Electric EF44AC (or ES44AC, ES44A6 or ES44C6) demonstrator diesels (GECX 2040, 2042, 2041 and 2043), which are headed to Denver to be tested on coal trains on the BNSF's Pike's Peak Sub. (Stratton, Nebraska – August 11, 2015)