Records, 2012-2013, of the Copper Country Survey, a historic preservation project which surveyed above-ground structures and historic resources in Keweenaw, Houghton, and Ontonagon counties as well as northwestern Baraga county. The Keweenaw National Historical Park Advisory Commission oversaw the survey.

Preservation study, 2002-2003, by the National Park Service of the Quincy Mining Company Smelting Works in Hancock, Michigan. The study produced a preservation and rehabilitation plan for the site. Includes a Historic Land Use Survey by Michigan Technological University as well as critical safety and preservation needs assessment documents, condition and stabilization studies, and alternative use studies.

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