Here is something you don't expect to see in the Arizona desert. Two former Delaware and Hudson Alco PA1s sit on flat cars at the west end of the Union Pacific's Tucson Yard. Photo taken with per... (more)

Former Southern Railway SD-45 3155 sits at the east end of the Southern Pacific Tucson yard, while SP "snoot" nose 8380 prepares to depart east for El Paso. Photo taken with permission.

There’s little doubt to the heritage of Union Pacific EMD GP40-2 No. 1413 switching at Tucson, Arizona, on April 24, 2017.

A pair of switch jobs at Union Pacific’s Tucson yard are led by former Southern Pacific EMD GP40-2s on April 24, 2017.

This is the emblem that stands atop the beautiful El Paso & Southwestern passenger depot in Tucson. Built in 1913, with the leasing of the railroad to the Southern Pacific in 1924, the depot was t... (more)

Near sunset, UP 6350 departs the yard westbound. UP 5338 is a GP40-2, starting out life as SP No. 7955.

Leaving downtown Tucson, Arizona, in its wake, Union Pacific ZSALC curves alongside N. Van Alstine Street heading west on the Sunset Route on April 24, 2017. I totally didn’t agree with the sentim... (more)

As the sun sets a Union Pacific manifest train roars up the 1% grade out of Tucson, AZ

UP 5430 comes to a stop at the Kolb OS to wait for a high priority Z train to pass before it continues on into Tucson for a fresh crew

Port Of Tucson engine 2210 getting tied down for the day

SP 7247 east throttles up it's large consist as it climbs toward the Mescal Summit on the SP Lordsburg's district east of Tucson. It's very cold this morning with a hint of snow on the ground.

UP 2571 passing through the new West Kolb OS on the UP Lordsburg Sub

Lease HLGX units 6813, 6817 along UP 3281, 3811 and CNW 8602 at the SP Tucson yard in 1999.

CSX 5836 west leads a consist of SP power and the Chicgo-Los Angeles express double stack out of the Tucson yard.

SP style B semaphore signal at MP 1017.6 on the SP Tucson Division.