- Content powered by AI✕This summary was generated by AI from multiple online sources. Find the source links used for this summary under "Based on sources".Union Pacific 4014Union Pacific 4014 is a preserved 4884-1 class 4-8-8-4 "Big Boy" type steam locomotive owned and operated by the Union Pacific as part of its heritage fleet. It is the world’s largest operating steam locomotive and the only one of the eight remaining Big Boys still in operation. Twenty-five Big Boys were commissioned exclusively for Union Pacific Railroad, with the first delivered in 1941. Union Pacific 4014 was restored and returned to service in 2019 after decades of retirement.See moreUnion Pacific 4014Union Pacific 4014 is a preserved 4884-1 class 4-8-8-4 "Big Boy" type steam locomotive owned and operated by the Union Pacific as part of its heritage fleet. It is the world’s largest operating steam locomotive and the only one of the eight remaining Big Boys still in operation. Twenty-five Big Boys were commissioned exclusively for Union Pacific Railroad, with the first delivered in 1941. Union Pacific 4014 was restored and returned to service in 2019 after decades of retirement.SourcesWikipediaUnion Pacific 4014 - WikipediaUnion 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.https://en.wikipedia.org/wiki/Union_Pacific_4014Union PacificBig Boy No. 4014 - Union PacificBig 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 exclusively for Union Pacific Railroad, the first of which was delivered in 1941.https://www.up.com/about-us/history/steam/big-boy-4014American-Rails.comUnion Pacific #4014 (Big Boy): Schedule, Specs, WeightLearn about the legendary Big Boy #4014, one of the largest and most powerful steam locomotives ever built. Find out how it was restored and returned to service in 2019 after decades of retirement.https://www.american-rails.com/4014.htmlWikipediaUnion Pacific Big Boy - WikipediaThe Union Pacific Big Boy is a type of simple articulated 4-8-8-4 steam locomotive manufactured by the American Locomotive Company (ALCO) in Schenectady, New York, between 1941 and 1944 and operated by the Union Pacific Railroad in revenue service until July 1959.https://en.wikipedia.org/wiki/Union_Pacific_Big_Boy
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