UP 551 (GP38-2) runs light after dropping off a cut of oil cans at a refinery in Commerce City, Colorado.

UP 551 (GP38N) moves through the BNSF's yard in Denver, Colorado after dropping off a transfer string.

Ex MP 4517. They looked so nice...in the death series and paint. The 500s were synonymous with early retirement, as evidenced by the UP repainting Rock island U28Bs they got back on lease, then ... (more)