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 and Silver Mining Company; Colorado Smelting and Mining Company; Diamond Coal and Coke Company; Parrot Silver and Copper Company; Reduction Department (Anaconda); Silver Bow Club; Trenton Mining and Development Company; Tuttle Manufacturing and Supply Company; and Washoe Copper Company. In addition, there are more than 100 smaller subgroups.
These U.S. Federal Power Commission records consist of hearing materials in a case involving the failure of the Montana Power Company to apply for a license to operate its hydroelectric dams on the Missouri River and tributaries. Exhibits in the case (including steamboat logs, diaries, articles, clippings, etc.) sought to document whether the Missouri River was navigable above Fort Benton. [FPC Docket #IT-5840.]