Re: Why the move?

Paul,
The Auxiliary tenders are converted UP 20,000 gallon tenders. These were convered by removing the oil bunker and closing up the coal space (what was left when the bunker was removed). The coal space was then opened and the ends of the tenders canted.
Their capacity was raised to 25,000 gallons. These tanks were insulated and sheathed in Sheet Metal (thus the smooth sides). The two tanks that the UP Steam Program currently used in Excursion Service were formerly used as fuel oil storage tanks in Los Angeles. There were three of them that made it to Cheyenne. Two were used for service, one for parts. The parts tank is all ready missing one truck due to some castings that broke on a truck when we were on an excursion. We had to set out one of the tenders at the time.
Another cylindrical tank was obtained from LA but it ended up in Ogden behind the Blow Hulk that they have on display there.
FYI: UP did not view their tenders as part of the locomotives. In looking through their engineering drawings, it is quite apparent that each tank was numbered individually and treated as a separate piece of rolling stock, even though it was coupled permanantly to a locomotive. So the Tenders that you are talking about might have been freely changed between the FEF-1's and the CSA 1 & 2's (te little Challengers). The parts certainly were.
Rick