Oliver Iron Mining Division, United States Steel CorporationA map of the 25th level at the Soudan Mine focusing on the Montana ore body. This is close up of the western section of the entire 25th Level map. The map shows the drifts, cross cuts, rock formations, raises, core sample drill holes, and stope areas. Lake Superior Datum.JPEGengU.S. Steel Corporation (Ely, Minnesota)PublicBusiness and industrySoudan Mine, No. 8 Shaft, 25th Level, East Montana, Map Two, Soudan, MinnesotaMapsMinnesota--SoudanMinnesota--Saint Louis County1959-01-01 - 1962-01-01University of Minnesota