The 'Bomb Cyclone' blizzard conditions that the crews had to cope with were incredible, with Denver actually recording a gust of 90 miles per hour. This was the same storm that blew a container train off a bridge in New Mexico.
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.