Union Pacific SD40-2 3600 with a stack train near Montpelier, ID in August 1993.

Union Pacific Gallery

UP SD40-2 3600 with a stack train near Montpelier, ID in August 1993.

Union Pacific SD40-2 3600 at the head of a westbound stack train near Montpelier, ID in August 1993. The 3600 was originally a "fast forty" UP 8091 which, when new had a special high speed gearing to run at speed with the DDA40X centennials.

Hasselblad 500CM 150MM Sonnar lens