A Duluth, Missabe & Iron Range SD18 switches Dock 6 late in the afternoon of October 20, 1985, framed by Dock 5 and a boarded up Jenswold Street Tower at Duluth, Minnesota. Thanks to Dave Schauer for clueing me in on the name of the tower.
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.