Utah Transit Authority's RP39-2C No. 901, nicknamed 'Snowflake' is parked in Union Pacific's Fourth South Yard in downtown Salt Lake City. It was built an EMD GP40 in 1967 as the L&N 3025. In 1991... (more)

UP's Fourth South Switcher meets the Wendover Local in the old Rio Grande downtown yard in Salt Lake City. Aug. 14, 2014

Looking resplendent in fresh paint, a GP15-1 awaits a call to serve on Monday's Fourth South Switcher.

More than 36 years of age and looking spiffy in new paint, UPY 574 goes about its daily routine of shuffling cars around the former Rio Grande Fourth South Yard in downtown Salt Lake City.

Union Pacific's YRO52R switch job takes the weekend off, parked in the former D&RGW Fourth South Yard in Salt Lake City. CA-11 caboose #25889 was built new by International Car for the UP in July ... (more)

While making a switch move into the yard, Union Pacific's YRO52R spews carbon particulates into the clear blue sky above Salt Lake City.

The crew of UP's YRO52R switch job has lined their train into the Fourth South Yard as a UTA FrontRunner commute departs Salt Lake Central terminal for Ogden.

A surprisingly clean Union Pacific GP15-1 awaits a call to duty in the former D&RGW Fourth South yard in Salt Lake City. The UPY 637 was built the Missouri Pacific 1637 by EMD in Oct. 1979.

The classic lines of an EMD GP15-1 are captured at the former D&RGW Fourth South Yard in downtown Salt Lake City. The UPY 585 was built the Missouri Pacific 1585 in December 1976.

Probably the cleanest GP15-1 in UP history parks its train in the old D&RGW Fourth South Yard in downtown Salt Lake City. Track equipment is piled high, anticipating Utah Transit Authority commute... (more)

Taking a well deserved break from switching local industries, Union Pacific GP38-2 563 awaits a Monday morning call to duty spotted in the old D&RGW Fourth South Yard in downtown Salt Lake City. T... (more)

While driving through downtown Salt Lake City, I spotted this immaculate, freshly painted UP GP15-1. The UPY 585 has been assigned to work the weekday YRO52R 'remote' switch job west of downtown. ... (more)

A pair of former Missouri Pacific EMD's meet in the old D&RGW Fourth South yard in downtown Salt Lake City. The UPY 585 (a GP15-1) was built the MP 1585 in December 1976 while the UP 804 (a GP38-2... (more)

While driving through downtown Salt Lake City, I spotted this immaculate, freshly painted UP GP15-1. The UPY 585 has just been assigned to work the weekday only YRO52R 'remote' switch job that wor... (more)