A nice variety of Union Pacific power gathers at the fuel track at Denver’s North Yard on a snowy April 15, 2013.

UP 506 (GP38-2) shares the North Yard with a variety of other engines, including a SD60M 'cyclops'.

UP 506, 1866, & 1577 lead the daily train to North Platte.

Blue hour on the fuel tracks
Nightfall is approaching, with whiteout of a spring snowstorm turning to the “blue hour” at Union Pacific’s North Yard locomotive facility on April 15... (more)

UP 506 (GP38-2) and UPY 661 (GP15-1) would get their turn shuffling cars in the North Yard, helping to assemble a train that eventually would include UP 2361, an SD60M 'Cyclops'.

Daylight during an early spring snowstorm is ending amid the “blue hour” just before nightfall at Union Pacific’s North Yard fuel tracks at Denver, Colorado, on April 15, 2013. The former Ri... (more)

UP 506 and UPY 1295 wait for assignments in the 36th Street Yard in Denver.