A pair of Union Pacific SD40N light motors wait for the call to action in the North Yard in Denver, Colorado.
The Armour Yellow of the Union Pacific motors stand out in the snow as they sit in the North Yard in Denver, Colorado.
UP 1652 (SD40N) waits for orders in the North Yard in downtown Denver, Colorado.
A blanket of snow covers the Union Pacific's North Yard in Denver, Colorado.
Sunrise shines on the bricks of the operations building at the Union Pacific's North Yard in Denver, Colorado.
UP 1652 (SD40-2) joins other light power waiting for servicing or orders in the North Yard in Denver, Colorado.
A visiting motor from the Rocky Mountaineer passenger train stands among the other UP motors in the North Yard in Denver, Colorado.
A rather untypical power arrangement leads UP's Wendover Local into North Yard in Salt Lake City.
After throwing the derail switch at milepost 9, Union Pacific's 'Dirt Train' resumes climbing the 1.76% grade of the Sunnyside Sub with 27 loads for ECDC at Columbia Junction.
Union Pacific's 'Dirt Train' local glides east through Spring Glen with 27 loads for burial at the East Carbon Development Company landfill on the Sunnyside Sub at Columbia Junction.
With three clean SD40-2s on the point, Union Pacific's 'Dirt Train' local climbs the 1.76% grade of the Sunnyside Sub with 27 loads for the East Carbon Development Company landfill at Columbia Jun... (more)
