Three vessels Northern King North Wind whaleback barge 131 loading at Duluth ore docks; 300 foot steel freighter North Wind damaged July 27, 1907 at a dock; steel steamer Northern King banged the pier at Superior August 11, 1907;
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Trout Lake beneficiation (or benefication) plant near Coleraine was completed in 1909-1910, to raise the iron content of lean, sandy ores. Beneficiation (or benefication) is one of a variety of process that treats the raw iron ore to separate the ore into the usable mineral and the part of the ore that is unusable (gangue).
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections