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.

UP 1885 leads chemung mtys westbound through Crystal Lake in golden light.

A set of trim power at UP's West Colton departure yard performs some switch moves near Pepper Ave.

It's a busy day in the Union Pacific's North Yard in Denver. Changing out track in the middle of an operating yard is challenging at best, with track maintenance vehicles jockeying for position a... (more)

UP 1610 (SD40N) works the North Yard after a night of heavy snow.

UP 1598 (SD40-2 which has been rebuilt to a SD40N) is sorting a cut of hoppers while UP 5087 brings another train into the yard. If you look closely in the background you can see a BNSF train wai... (more)