Following the serpentine banks of the Colorado River on Union Pacific’s Moffat Tunnel Subdivision, UP’s MNYRO freight running from Denver to Salt Lake City approaches Yarmony, Colorado, on August, 3, 2014.
The EMD SD (special duty) series are a strong and reliable kind of locomotive which still serve America's rails today. They have proved themselves reliable by clocking in several million miles of freight service over several decades.
