Back-to-back SW10s make a set out at Big Four Distributing Co. in Provo.
A massive thunderstorm brews in the distance as UP 1211 (former Missouri-Kansas-Texas GP39-2) works the 36th Street Yard in Denver.
The Pioneer Local wanders down the Salt Lake Union Stock Yard Spur at the Flying J refinery in North Salt Lake.
If you are visiting Denver and want a good place to watch trains, try West 48th Avenue, from which you can see the Union Pacific's North Yard and the adjacent engine servicing facilities.
A trio of EMD's are in the 36th Street Yard - UP 2361 (SD60M) waits for an assignment while UP 1211 (GP39-2) and UP 1425 (GP40-2) sort cars.
The prototype SW10 was rebuilt in 1981 at the Omaha Shops. UP #1221 was originally UP SW9 #1832.
Working the auto racks at West Chicago.
