UP 4006  Contributor's Pick!       
One of the largest steam engines ever built! 25 were built for Union Pacific in the early 1940s. This is one of eight still in existence.
Date: 6/19/2021 Location: Kirkwood, MO   Map Show Kirkwood on a rail map Views: 207 Collection Of:   Matthew Zisi
Locomotives: UP 4006(4-8-8-4)    Author:  Matthew Zisi
UP 4006
Picture Categories: Roster,Steam This picture is part of album:  St. Louis Museum of Transportation: Big Boy, Katy Steam Engine, and a Whole Lot More
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