With Burnham now gone for 2 1/2 years, North Yard has taken on minor repairs to engines. Anything that cannot be repaired in Denver is typically sent to either North Platte, NE or Little Rock, AR. Here, a string of four units sits on one of the repair tracks at North Yard. Closest to the camera is an NRE 3GS21B; a low emissions unit that spends most of its time in either Texas or California.