The remote engineer sends UP 801 to the south end of the UP's North Yard in Denver, where it will work for the next 20 minutes sorting cars back into the yard ladder.

UP 801 (GP38-2) backs a load of ballast into the yard which will be used once the new automated switches are installed.

There is a bit of a traffic jam in the Union Pacific's North Yard as a pair of light power and a quartet of heavies wait for UP 801 to finish shorting a cut of freight cars.

There is lots of activity in the UP's North Yard on a cold January morning.

A fresh layer of snow in the UP's North Yard brings out the colors of the GATX and UP units waiting for assignments.

UP 801 (GP38-2) meets UP 2327 (SD60M) in the 36th Street Yard.

There has been a noticeable increase in the last couple months of engines going through the UP's North Yard. A sign of the current booming economy.

UP 801 and 825, both ex Missouri Pacific GP38-2's, work the 36th Street Yard in a snowstorm.

The sun has just about set on UP 801 as it shuffles the last set of cars in the 36th Street Yard.

The remote engineer for UP 801 (GP38-2) brings a cut of freight out of the North Yard for sorting.

A pair of Geeps (GP38-2's) work the 36th Street Yard.

There is a nice variety in the North Yard on this day, including some MP15 units, a gaggle of Geeps and some heavies waiting for assignments.

UP 8965 (SD70AH) has just pulled a freight into the North Yard and the crew of UP 801 (GP38-2) is eager to begin sorting the cars.

Two Savage engines visit the UP's North Yard.

'Blue Hour' at the North Yard. The North Yard crews are getting an early start to the day. Although sunrise is still 15 minutes away, the blue hue of the hour is beginning to catch a few hints of ... (more)