The American Locomotive Company built Union Pacific 4014, a 4-8-8-4 “Big Boy” steam locomotive in November 1941 for $265,174. The builder delivered it to Union Pacific the following month.
Part of the initial group of 20 Big Boys (Class 4884–1), No. 4014 was designed to move heavy freight — about 3,600 short tons — over the Wasatch Range, and Big Boys often handled trains up to 4,200 short tons.
During an April 2, 1943, performance test, No. 4014 hauled 65 freight cars between Ogden, Utah, and Evanston, Wyoming. During the test, it generated a reported maximum of 5,530 horsepower.
The locomotive’s last routine repairs were completed in 1956. Its last revenue run took place on July 21, 1959.
During its revenue service, the locomotive traveled 1,031,205 miles. Union Pacific retired No. 4014 on Dec. 7, 1961, and donated it to Pomona, California, for display in 1962.
Union Pacific announced in 2013 that No. 4014 would return to its steam program. On May 1, 2019, it moved under its own power for the first time in nearly 60 years following restoration.
