Document describing a collection of records held in the Minnesota Discovery Center Archives documenting the activity of the Butler Brothers and Hanna Mining Company.
Cross section reveling the infrastructure of an operating underground iron ore mine. Note that the blue material that looks like it could be water, is in fact the ore body.
Iron Mining; Underground Mining; Oliver Iron Mining Company
Document describing a collection of records held at the Iron Range Research Center documenting the activity of a railroad company operating in northeast Minnesota.
Document describing a collection of records held at the Iron Range Research Center documenting the activity of Peter Del Greco, a former United States Steel employee.
Del Greco, Peter; Chisholm (Minn.); United States Steel Corporation; Iron mines and mining--Minnesota.
Document describing a collection of records held at the Iron Range Research Center documenting the activity of the Zim Cooperative Association and its predecessors.
