How many Union Pacific Big Boys are still running?

Today, eight Big Boys survive, with most on static display at museums across the United States. One of them, No. 4014, was re-acquired by Union Pacific, and between 2014 and 2019 was rebuilt to operating condition for the 150th anniversary of the first transcontinental railroad.



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Twenty-five Big Boys were built exclusively for Union Pacific Railroad, the first of which was delivered in 1941. Of the eight remaining Big Boys in existence, No. 4014 is the only one operating today.

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4014 restoration cost, but Wrinn estimated at least $4 million based on similar restorations. The result will be one of just six to eight steam engines still operational on mainline U.S. railroad tracks. “Living Legend” Northern No. 844 has remained in service since 1944.

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In PTC territory the diesel is part of safety measures. Like any other mainline steam locomotive that was built to burn coal but after leaving the locomotive's assembly plant or during a restoration to operating condition had it converted to burn fuel oil.

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2023 Schedule In 2023, Big Boy No. 4014 visited Omaha on the Home Run Express during June. To be notified of future steam schedule updates, join the Official Union Pacific Steam Club at http://up.com/SteamClub !

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Each one cost approximately $265,000 to build, or about $4.4 million in today's money. In the railroad world, the Big Boys were known as 4-8-8-4 articulated type locomotives.

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The Big Boy No. 4014 steam locomotive rolled out of a Union Pacific restoration shop in Cheyenne for a big debut after five years of restoration. It then headed toward Utah as part of a yearlong tour to commemorate the Transcontinental Railroad's 150th anniversary.

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