A Utah Railway MK50-3/CORP SD40T-2 duo slowly work the KYLE Railroad's biweekly LISA turn (Limon-Salina) east out of Bethune, CO on the Rock Island Rocky Mountain Rocket Route. UTAH 5005 is one of six MK5000Cs built by MK Rail from 1994 to 1995. After being tested by UP and SP for a year and returned, all eventually found themselves in coal service on the Utah Railway. After only a month of service on the UTAH, ?they would have their main alternator removed and replaced with an EMD AR11 main alternator and the engine blocks replaced by EMD 3500 Horsepower 16-645F3B diesel engines from five retired Union Pacific EMD SD50 and one retired Union Pacific EMD GP50. They are now designated as MK50-3s. Once the Utah Railway's coal contract expired, five were sent to the KYLE Railroad in 2017 and earn their keep there today.
