UP 4999 (SD70M) has just been serviced and now parks on the ready track until orders come through.

BNSF 1899 (SD40-2) lashes up to a container train which it will take to the ready track and stage for the Z train.

DENVER CO Oct 4 1983 — Burlington Northern SD40-2s 8125, 8022, 7136 and 6363 are tied down at the engine facility. My photo.

BNSF 1899 (SD40-2) runs light towards the BNSF intermodal facility in Denver, Colorado where it will stage a container train.

A smile and a wave greet the photographer as the California Zephyr backs into Denver's Union Station.

Freezing temperatures and blowing snow blankets the BNSF engine servicing facility in Denver, Colorado. A rare sight these days catches two Cascade Green Burlington Northern SD40-2's waiting for ... (more)

Light snow catches BNSF 9570 SD70MAC holding station in the yard at the BNSF engine servicing facility in Denver, Colorado.

BNSF Grinstein MAC 9828 waits in the falling snow for order to take a train out of the yard in Denver, Colorado.

A deep freeze and falling snow covers the BNSF firefighting cars as well as engines waiting at the engine servicing facility in Downtown Denver.

Amtrak engine #189 (P42DC) backs the California Zephyr 6 train into a foggy and snowy downtown Denver, Colorado as it heads to Union Station.

RTD light rail train #293 passes an idle BNSF train at the Evan Station in south Denver, Colroado.

BNSF 4260 (ES44C4) gets ready to take four Stadler FLIRT (Fast Light Intercity and Regional Trains) to DART (Dallas Area Rapid Transit) in Texas. Meanwhile an RTD Light Rail train passes by as it... (more)

Denver Union Station has become a busy place in recent years. A couple extra cars, presumably used as backup equipment, wait their next assignment amidst the sprawling track layout.

A wide shot at the Union Pacific's North Yard in Denver catches two trains that have just entered the yard, while UP 688 (GP 38-2) begins to sort a cut from a train that arrived the day before.

BNSF 6185 (ES44AC) waits for its turn in the fuel and sand service bay at the BNSF engine servicing facility in Denver, Colorado.