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Union Pacific Big-Boy No. 4014 [Marked]

[NOTE: this may not be 100% the same but i based it off of images i saw] HISTORY: Produced from 1941 to 1944 by the American Locomotive Company of Schenectady, N.Y., exclusively for the Union Pacific Railroad, the Big Boy locomotives were designed primarily to handle heavy freight traffic in the Wasatch Mountains, where trains faced a continuous grade of 1.55 percent on a stretch of track east