Oliver Iron Mining CompanyA map of the 18th level at the Soudan Mine continuing from Map One going weSaint The map shows the drifts, cross cuts, rock formations, raises, core sample drill holes, and stope areas. Lake Superior Datum.JPEGengPublicBusiness and industrySoudan Mine, No. 8 Shaft, 18th Level, Montana (Map Three), Soudan, MinnesotaMapsMinnesota--SoudanMinnesota--Saint Louis County1930University of Minnesota