KCSM 4081 leads the Laurel, MT to Denver, CO manifest train as it takes the siding at Broomfield. On the main track, an Amarillo, TX to Denver, CO manifest waits for a new warrant to head north to Cheyenne. While that manifest terminates in Denver, 31st yard can not handle the train, so they'll run it up to Cheyenne for storage and sorting of the cars.