UP 1980 (SD40N) works the local in Brighton on the Greeley Sub.

UP 1980 (GP38N) and other light power sit in the North Yard in Denver, Colorado.

UP 1980 (GP38N) joins other light power in the North Yard as they wait for their chance to sort freight cars.

UP 1980 (GP38N) waits in the Union Pacific's North Yard in Denver, Colorado for service at the fuel islands.

UP 1980 (GP38N) heads into the North Yard for a day of sorting cars in the snow.

A cut of heavy motors makes their way to the fuel island while UP 1980 (GP38-2) holds for an assignment to sort cars in the North Yard in Denver, Colorado.

Here is a good shot of the Union Pacific operations building in the North Yard in Denver, Colorado.

UP 1980 (GP38N) sits on the ready track next to the fueling island in the Union Pacific's North Yard in Denver, Colorado.

UP 1980 (GP38N) sits in the North Yard with other light motors after a fresh layer of snow fell the day before.

The snow is falling fast as UP 1980 (ex Southern Pacific GP38-2) and mates wait in the North Yard for assignments.

UP 1980 (SD40N) works the North Yard in Denver, Colorado.

UP 1980 (SD40N) appears to be in echelon right formation with other motors as it repositions in the Union Pacific's North Yard in Denver, Colorado.

Union Pacific GP60 and yard power mates wait for assignment.