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.

Among the power in the Union Pacific's North Yard is UP 1865, a SD40N that started life in 1977 as a SD40-2 for the UP.

UP 1865 (SD40-2 rebuilt as a SD40N) moves through the signal tower on the Moffat Tunnel Sub.

Three pristine SD40N’s are in charge of Union Pacific’s “Dirt Train” out of Helper Yard this day. The train is seen here rolling downgrade and crossing Grassy Trail Creek. It has finished ... (more)

A mix of light and heavy power que up to the fueling islands in the UP's North Yard in Denver, Colorado.

We are starting to see a greater number and variety of engines again in the Union Pacific's North Yard in Denver, including UP 1826. Notice the missing front plow. She started life in 1975 with ... (more)

UP 1997 (SD40N) and a variety of other UP power hold station in the North Yard for servicing prior to the call to duty.

UP 1914 and 1733 lead the LPR49C over the 150 year old Tiffany Limestone arch bridge.

UP 1997 (SD40N) and other light power work the North Yard in Denver, Colorado.

UP 1667 (SD40N) takes point on the deadline in the Denver North Yard.

UP 1610 and UP 1826 both started life for the Union Pacific (1610 in 1977 and 1826 in 1972) as SD40-2's and were rebuilt to SD40N's. Of interest is the different front blade configurations.

UP 1865 (SD40N) waits for a new cut of cars to sort in the Union Pacific's North Yard.