A Union Pacific auto train and a work train meet in Salt Lake City on Feb. 21, 2015.

Minutes after a quick crew change at North Yard, the KG1CI-19 departs Salt Lake City on Feb. 21, 2015.

After a quick five minute crew change, a KG1CI-13 stacker departs Salt Lake City for City of Industry, California.

A shiny new GE ES44AH, assigned to a CWTNO9-11 coal train, pauses for a recrew at Union Pacific's North Yard in Salt Lake City.

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)

GE C36-7 and U30C locomotives take a break in Salt Lake City on New Year's Eve, 1986.

A UP American President Lines stack train departs Salt Lake City for Los Angeles on July 21, 1994.

Amtrak's California Zephyr train No. 5 prepares to depart the Rio Grande depot in Salt Lake City on Dec. 12, 1998.

When Utah Transit Authority was building its new tracks between Salt Lake City and Ogden adjacent to Int.15 most of the way, it painted its ballast cars with its new FrontRunner red, white and blu... (more)

An EMD GP9 awaits an assignment at North Yard in Salt Lake City on July 25, 1980. The UP 189 was built by EMD for the Union Pacific in April 1954 and retired from the active roster in October 1983... (more)

A new Western Pacific GP40-2 awaits an assignment at UP North Yard in Salt Lake City on July 25, 1980.

A pair of new MK Rail Liquid Natural Gas Powered MK1200G switchers pause briefly in Salt Lake City during transit to the Atchison, Topeka & Santa Fe Railway in Los Angeles. The ATSF 1201 was built... (more)

Rio Grande GP40-2s No. 3116, 3114 and 3124 drag a heavy Fourth South Switcher from downtown Salt Lake City on July 21, 1996.

A TRAX Blue Line train is seen here southbound on S. Main St. in downtown Salt Lake City headed for suburban Sandy further south in the valley. That red brick building in the background is the Lit... (more)

After helping a late Amtrak California Zephyr train No. 6, the last new Rio Grande locomotive enjoys a little break at the beautiful D&RGW passenger station in Salt Lake City. Sept. 9, 1996