View of Oliver Iron Mining Company Canisteo District mining activity near Trout lake at Coleraine. OIM's original experimental washing plant to right of center.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Two Duluth, Missabe & Northern ore cars stand loaded at the ore washing plant in Coleraine. The U.S. Steel Traffic Committee is clustered on the distant right.
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