Collection, 1976-2000, of the Keweenaw Heritage Center located in Calumet, Michigan. Includes pamphlets, newspaper clippings, correspondence and photographs pertaining to the establishment of the Keweenaw Heritage Center, its location in the historic St. Anne's Catholic Church building and the renovation of the building.

Newspaper clippings, undated, about the Keweenaw National Historical Park, collected by R. Charles Stetter, a resident of Calumet, Michigan and an amateur historian of the Keweenaw Peninsula.

Collection, circa 1980-circa 1995, of Stanley J. Dyl, a longtime resident of Calumet, Michigan and curator of the A. E. Seaman Mineral Museum at Michigan Technological University. Contains planning documents for the establishment of the Keweenaw National Historical Park in Michigan's Upper Peninsula as well as exploratory studies on alternatives to a national park. Including correspondence, minutes from various local organizations, newsletters, clippings, legislation, and paperwork.

Research materials and personal papers, 1956-2019, of William "Bill" J. Sproule.