Abstract This collection consists of records (1876-1974) of the Anaconda Copper Mining Company and contains correspondence, court papers, financial and production records, legal documents, organizational records, subject files, and other materials for the Anaconda Copper Mining Company and many of its predecessor and subsidiary companies and departments. Among the major subgroups are General Office; Big Blackfoot Milling Company; Bitter Root Development Company; Boston and Montana Consolidated Copper...

Abstract

Records (circa 1880-1947) of Montana Power Company predecessor companies consist of correspondence, financial records, legal documents, and minutes of many electric power, light, water, street railway, townsite, realty, and land companies around Western and Central Montana.

Abstract This collection is a subgroup (Division) of the Montana Public Service Commission records, RS 501. The Utility Division is now, as of 2025, named the Regulatory Division. Please see the primary finding aid for more Montana Public Service Commission records. These records consist primarily of annual reports (1914-1986) made by electric utility companies, gas companies,...