Photographs, circa 1910, depicting the construction and interiors of the Quincy Mine Hoist No. 2.

Papers, 1966, chronicling the tragic death of 7-year old Ruth Ann Miller. Miller was playing around the abandoned No. 4 shaft of the Tamarack Mine in Houghton County, Michigan when she slipped under its cap and fell to her death. Includes photocopies and scans from local and regional papers about the accident and the subsequent unsuccessful attempts at rescue and recovery. Also includes newspaper accounts about the vandalism of the memorial erected at the site.

Patents, 1943-1944, issued to John Murray Riddell for improvements to mine shaft sinking apparatus. Includes patent issued by the United States in 1943 as well as a patent issued by the Union of South Africa, a dominion of Great Britain.

Blueprints, circa 1898-circa 1913, collected by Theodore Dengler, an alumnus of the Michigan Mining School in Houghton, Michigan. Dengler worked at the Atlantic, Baltic, Mohawk and Wolverine mines. Includes blueprints of machinery, buildings, and maps, mainly from the Atlantic and Baltic mines with some from the Mohawk, Wolverine, Allouez, Champion and Central mines. Also includes correspondence and other printed ephemera.