An eastbound Union Pacific freight approaches the Hermosa Tunnels leaving Hermosa, Wyoming, in July 1984. EMD’s SD40-2 ruled the UP main line back then, and the power on this train is no exception, led by No. 3280.
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.
