Collection Scope and Content Summary From the Collection: Inventory, 1998, of the underground metallic mines in Baraga, Dickinson, Gogebic, Houghton, Iron, Keweenaw, Marquette, and Ontonagon Counties. Under the direction of the Mineral Technology Research Group of the Michigan Technological University Mining Engineering Department, researchers and students worked on a project to produce an inventory of the abandoned underground metallic mines in Michigan. Over 800 mines were identified and over 2,000 shafts cataloged. Field inspections prioritized...