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
Gathering of the officers, superintendents, captains, foremen, engineers, and engineer's helpers of the Hibbing Chisholm district offices of the Oliver Iron Mining Company on the occasion of the promotion of Pentecost Mitchell from general superintendent to president.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections
Marion Model K steam shovel with a two and a half cubic yard dipper working along side a 25 ton wooden ore car for the Oliver Iron Mining Company in the open pit Mountain Iron mine.
Contributing Institution:
University of Minnesota Duluth, Kathryn A. Martin Library, Northeast Minnesota Historical Collections