UP 1640 SD40N sorts oil cans in the North Yard as a pair of BNSF motors arrange a stack track in the adjacent intermodal facility.

UP 1826 (SD40N) moves a center beam car to a lumber distribution company in the UP's North Yard.

UP 1826 (SD40N) moves a cut through the North Yard in Denver, Colorado.

UP 1640 is one of many SD40N units that can be currently found working the North Yard in Denver.

UP 1865 (SD40N) shuffles cars in the North Yard in Denver, Colorado.

UP 1865 (a SD40-2 rebuilt as a SD40N) sits in the Union Pacific's North Yard in Denver, Colorado.

UP 1865 (SD40N) joins other light power in the Union Pacific's North Yard in Denver, Colorado.

UP 1905 (SD40N) runs long hood forward (backwards) with a MOW train at Speer, Colorado.

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.

UP 1865 is an SD40-2 that was rebuilt as a SD40N. You can always find a nice variety of power working in the Union Pacific's North Yard in Denver, Colorado.

A number of Union Pacific SD40N (former SD40-2's) are currently working in the North Yard sorting freight cars throughout the day.

UP 1826 (SD40N) makes like an Alco and smokes as it pulls a heavy cut from the North Yard for sorting.

The massive snow storm not only shut down the BNSF for two days but also stopped all Union Pacific Traffic (as well as all RTD light rail and commuter trains). Tracks remain snow covered with sno... (more)

UP 1640 (SD40-2 rebuilt to a SD40N) waits with other light power for assignment in the Union Pacific's North Yard in Denver, Colorado.