Built in November 1941 by the American Locomotive Company (ALCO) in Schenectady, New York, it was assigned to haul heavy freight trains in the Wasatch mountain range.

Big Boy No. 4014 is the world’s largest operating steam locomotive. Of the eight remaining Big Boys in existence today, No. 4014 is the only one still in operation. Twenty-five Big Boys were commissioned …

Feb 25, 2025 · Union Pacific 4014 is the latest star in the railroad's growing collection of heritage steam locomotives. It returned to active service on May 2, 2019.

May 24, 2024 · When No. 4014 made its restored debut in 2019, it did not carry PTC equipment. The FRA granted a waiver for the locomotive to operate in PTC territory even without the system. Big Boy …

Union Pacific Railroad's 4014 "Big Boy" is the largest operational steam locomotive in the world.

Mar 29, 2025 · Union Pacific 4014 is a preserved 4884-1 class 4-8-8-4 "Big Boy" type steam locomotive owned and operated by the Union Pacific (UP) as part of its heritage fleet.

Manufactured by the American Locomotive Company (ALCO) in November 1941, it is a 4-8-8-4 articulated locomotive designed to haul heavy freight over the Wasatch Mountains in Utah. No. 4014 …

Union Pacific No. 4014 is a Big Boy class steam locomotive having a 4-8-8-4 wheel arrangement. They are the heaviest single expansion steam locomotive ever built, weighing about 1,200,000 pounds. …

May 12, 2025 · After its retirement in 1961, Union Pacific reacquired and restored Big Boy No. 4014, launching it back into operational service. The locomotive, boasting unrivaled power and size, is the …

Jul 14, 2024 · Union Pacific 4014 is a steam locomotive owned and operated by the Union Pacific (UP) as part of its heritage fleet.