Although it is currently attached to UP 3985, this is the tender for Big Boy 4014. In 2019 when they were trying to finish up the restoration for 4014 in time for the 150th Anniversary of the Golden Spike they saved a little time by "borrowing" the already oil-converted tender from 3985. Railroading Heritage of Midwest America is supposed to perform the oil-converion on the 4014 tender and will swap it out with the 3985 tender so both locomotives get their tenders back.
