Judging by the picture of #12 in the engine house it looks like the backhead has been removed from 12. Otherwise you would be able to see the fire door opening rather than most of the smoke box door of #9 behind it through the boiler. If it is a recent picture it will be unlikely we will see it steam on the loop this year.
Roger Mitchell
Master Mechanic: Fort Collins Municipal Railway
Track record. 4 hours of unscheduled down time in over 20 years of operation. Lowest fare of any heritage railway in the state of Colorado. Still $1.