State of Minnesota Department of Highways Map showing location of proposed bridge over St. Croix River at Stillwater between Minnesota and Wisconsin Approved June 7, 1929 includes structure elevation, span and dimensions, fill, water elevation and roadway dimensions and State of Minnesota thumbnail map.
A map of the 16th level at the Soudan Mine starting from the No. 8 Shaft going west. The map shows the drifts, cross cuts, rock formations, raises, core sample drill holes, and stope areas. Lake Superior Datum.
State of Minnesota Department of Highways Map showing location of proposed bridge over St. Croix River at Stillwater between Minnesota and Wisconsin Approved June 7, 1929 includes structure elevation, span and dimensions, fill, water elevation and roadway dimensions. Sheets 2 and 3 are connected to show a total panoramic view.
A map of the 18th level at the Soudan Mine starting from the No. 8 Shaft going west. The map shows the drifts, cross cuts, rock formations, raises, core sample drill holes, and stope areas. Lake Superior Datum.
A map of the 15th level at the Soudan Mine starting from the No. 8 Shaft going west and a portion to the east. The map shows the drifts, cross cuts, rock formations, raises, core sample drill holes, and stope areas. Lake Superior Datum.
A map of the 20th level at the Soudan Mine starting from the No. 8 Shaft going west. The map shows the drifts, cross cuts, rock formations, raises, core sample drill holes, and stope areas. Lake Superior Datum.