Oliver Iron Mining CompanyA map of the 21st level at the Soudan Mine starting from the No. 8 Shaft going east and weSaint The No. 8 Shaft is not listed, but it appears at the 3,8 NW of SW. 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, 21st Level, Soudan, MinnesotaMapsMinnesota--SoudanMinnesota--Saint Louis County1943-04-07 - 1946-08-01University of Minnesota