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A resource for reliable information about significant people, places, events, and things in Minnesota history.
United States Steel’s Extaca plant, 1960. The Oliver Mining Division of USS built the Extaca plant to accompany the Pilotac plant in the development of feasible taconite processing methods.
Made possible by the Arts and Cultural Heritage Fund through the vote of Minnesotans on November 4, 2008. Administered by the Minnesota Historical Society.
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