Union Pacific GE AC4400CW-CTE No. 5687 is being overhauled in the backshop at the railroad’s Burnham Shops in Denver, Colorado, on December 7, 2015. The old 4,400 hp 7FDL16 prime mover is lower ... (more)

Union Pacific GE AC4400CW No. 6704 is in the shop at South Morrill, Nebraska, for a engine change on September 15, 2017. The day before, a new prime mover was lowered onto the frame by the capable... (more)

Its 'Throwback Thursday' as a number of former Burlington Northern units wait for service or assignments in the BNSF's Denver Yard.