Collection, circa 1922 to circa 1967, of blueprints and blueline prints from the Calumet and Hecla Consolidated Copper Company. Includes prints from various firms employed by the company such as Westinghouse Electric Corporation, Stone and Webster Engineering Corporation and General Electric Company as well as prints produced by employees of Calumet and Hecla Consolidated Copper Company.

Blueprints, circa 1890-circa 1946, of the Nordberg Manufacturing Company of Milwaukee, Wisconsin. Includes blueprints of valve engines, pumps, hoists, compressors, and similar equipment, much of which was used by mining companies in Michigan's Upper Peninsula.

Records, 1972-1974, of Northern Technical Services, Inc. located in Laurium, Michigan. Includes a catalog, and supplements, for machined and fabricated replacement parts for the mining industry as well as a letter announcing a stockholders' meeting.

Collection, 1860-1979, of the Quincy Mining Company in Hancock, Michigan. Drawings include commercial, domestic, industrial, and public buildings, machinery, subterranean maps, surface maps, transportation systems, utilities, and tools.

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.