petrifiedagg posted:Did I read somewhere- or imagine- that they are using a Challenger tender because the Big Boy's tender is not ready?
Exactly! I'm assuming only temporarily, they're using the tender from Challenger locomotive no. 3985, which was in service up until 2010. Therefore, the tender was basically in serviceable condition, and had all of the necessary plumbing and piping for hooking up air brakes, aux tenders, etc. In addition, the 3985 had been converted to oil in the early 1990s, so the tender was already set up as an oil tender, versus the 4014's still in a coal configuration.
Like I said, I'm assuming this is a temporary fix. If the crew were to spend time on the 4014's tender before the big day, they might not have gotten it ready in time. Plus, the 3985 is to return to service in the early 2020s, so she'll need her tender for then.