Union Pacific has begun restoration of a Big Boy (4-8-8-4), #4014 that was in Pomona Ca since 1961

Photo by Chris Stark who drove his 1941 Cadillac down to the Pomona fairgrounds (Wally Park Museum/Grand National Roadster Show/LA Roadster show location)  to take this photo of his car with a Big Boy locomotive…. a rare opportunity. Both were made in 1941

No. 4014 will be restored to operating condition by Union Pacific’s Cheyenne, Wyo.-based Heritage Fleet Operations within the next five years. 4014 will join UP’s two other famous steam locomotives—4-6-6-4 Challenger 3985 and 4-8-4 Northern 844—in excursion service when her restoration is completed. She will become the world’s largest operational steam locomotive.

On July 23, 2013, UP announced that it had reached an agreement with the Southern California Chapter of the Railway & Locomotive Historical Society in Pomona, Calif., to transfer ownership of 4014 back to UP. The railroad will relocate 4014 to Cheyenne, where the Heritage Fleet Operations team will begin restoration, including a fuel conversion to No. 5 oil

Twenty-five Big Boys were built exclusively for Union Pacific by the American Locomotive Company (Alco) between 1941 and 1944