The records of the Bunker Hill and Sullivan Mining and Concentrating Company and its successors span the years 1887 to 1984.

Administrative records, 1887-1978, include minute books, annual reports, and staff reports. Among the correspondence files, 1892-1981, are managers' letters, general correspondence, presidents' files, and letters arranged by individual writer. Accounts receivable, appraisements, audit reports, directors monthly statements, employee earnings records, and ledgers and journals form the Financial records, 1885-1982. Included with the legal records, 1885-1979 are the original claims register, court documents, property appraisals, and documents concerning the National Lead Company suit. There are a few items relating to capital stock transaction s, 1887-1968, mine and plant operations, 1906-1984, and personnel matters, 1941-1982. There is also a chronologically arranged historical file, 1885-1981, and a set of scrapbooks, 1897-1976 containing clippings about Bunker Hill and mining in general.

Another series contains various company newsletters, 1956-1981, including GAP News and the Bunker Hill Reporter. Bunker Hill operated several subsidiary and affiliate companies including Caledonia Mines in Kellogg, Metaline Contact Mines in northeast Washington State, Pend Oreille Mines and Metals in Metaline Falls, Washington, and Reeves MacDonald Mines in Salmo, British Columbia. Records for these companies are in another series. A miscellaneous series contains records of the Silverhorn ski area, plant handbooks and safety manuals, and reports on mining properties not owned by Bunker Hill. The final two series contain large collections of photographs and maps.

These records have been used extensively by University of Idaho history professor Katherine G. Aiken in the preparation of several published articles and a forthcoming book on the Bunker Hill Company. The published articles are: "It may be too soon to crow": Bunker Hill and Sullivan Company efforts to defeat the Miners' Union, 1890-1900, Western Historical Quarterly, 24 August 1992, Pp. 309-331; Bunker Hill versus the lead trust: the struggle for control of the metals market in the Coeur d'Alene mining district, 1885-1918, Pacific Northwest Quarterly, April 1994, Pp. 42-49; and "Not long ago a smoking chimney was a sign of prosperity": corporate and community response to pollution at the Bunker hill Smelter in Kellogg, Idaho, Environmental History Review, Summer 1994, Pp. 67- 86

Related records from the Bunker Hill company are in Manuscript Groups 130 (Records, 1894-1937, 5 cubic feet), 187 (Research and Development Division records, 1922-1982, 8 cubic feet), and 188 (Legal cases, 1899-1902, 1.5 cubic feet). The library also holds records from other Coeur d'Alene mining companies; see Day to Day: A guide to the Records of the Historic Day Mines Group in the University of Idaho Library (1992).