UP 1989 led this coal empty in to Denver from the Greeley Sub. However, because the train entered North Yard for an air test, it departed with UP 1989 trailing. Unfortunately, because the (new) leader on the opposite end stopped loading. While three units was enough for the train to make it up to the Moffat Tunnel (it was configured 2x2), the train could not run 1x2, which is what it would effectively be if the crew isolated the lead unit that was not loading. The crew believed they could reset the fault causing the train to not load, so it would depart Leyden shortly after this shot was taken.
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