After returning to the main from the Rocky Spur, the power needed to run around the six cars that will be returned to Denver. Because the train has two six axle units, they could not wye on the spur. So, the power exited the west end of Rocky, came east through the siding, and is exiting the east end to go back on the main to then head east to North Yard. The conductor is protecting the shove for the engineer, located in the other unit.
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