An EMD SW9 takes a break in Union Pacific's Riverdale Yard in Ogden on Feb. 27, 1977. The 1844 would be rebuilt as an SW10, released the UP 1217 on March 30, 1981.

A pair of classic EMD SW9s enjoy a little down time parked in Union Pacific's Riverdale Yard in Ogden. The UP 1844 was built by EMD for the UP in April 1953, and was rebuilt by UP as SW10 No. 1203... (more)