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Union Pacific Railroad No. 4024 was a four-cylinder articulated 4-8-8-4 locomotives "Big Boy" type steam locomotive built by the American Locomotive Company in 1944 for the Union Pacific Railroad.

List of Union Pacific Big Boy Locomotives
Real-Life Members: 4000400140024003400440054006400740084009401040114012401340144015401640174018401940204021402240234024
Fallen: 400040014002400340074008400940104011401340134015401640194020402140224024
Preserved: 40044005400640124014401740184023
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