by Dick Cowles » Mon Jun 18, 2012 3:37 pm
As said in previous posts in this thread, decisions about when to rebuild the boilers of 484 and 488 are up to the Commission (which has to come up with the money) and HRM (which manages such shop work).
Back in January the assumptions about future locomotive usage were increased to adjust for anticipated new, additional trains by HRM. For instance the total "days under steam" for all C&TS locomotives was projected at 640 days, as compared to the approximately 500 days the locos were under steam in 2011 (a 28% increase in loco usage). On this basis, if usage is spread equally among the C&TS locos (as usually occurs), 484 would get through the 2012 and 2013 seasons and most of the 2014 season before reaching the 1,472 day limit mandated by the FRA under the Part 230, Form 4, regulations. Furthermore, 487 would get through all three of those seasons before hitting the 1,472 day limit. Obviously, waiting until the 2014-15 off-season to do both would unnecessarily overload the shop. So best to do one boiler rebuild per off-season. This also makes sense when one considers that 488's boiler is likely to reach its 1,472 limit toward the end of the 2015 season.
Since there is some risk that one or more of the K-36's could begin to experience boiler problems before reaching the 1,472-day limit, the Commission and HRM could decide that accelerating the schedule would be best. That becomes a question of funding availability, other shop priorities such as running gear rebuilds, cylinders, appliances, etc., and the actual condition of the boilers themselves -- none of these factors are fixed and immutable except the 1,472-day limit.
Because neither Colorado nor NM appropriated any monies for locomotive work for fiscal 2012-13, even if the Commission and HRM wanted to do either 484's or 487's boiler in advance this winter (i.e., two seasons sooner than mandated under FRA rules), the Commission might not be able to afford it. Fortunately, NM appropriated enough money for track and boiler work for fiscal 2011-12 that those monies might prove sufficient, but that's up to the Commission to determine how best to allocate such funding.
Whatever the outcome, the good news is that the K-36 fleet is in damn good shape and the return of 463 to service will provide further support for new and innovative services by HRM.