This collection contains papers of Leverett S. Ropes concerning his mining engineering and geology consulting work and relative to his interest in political issues. The general correspondence (1928-1952) mostly concerns mines in Lewis and Clark, Jefferson, and Broadwater counties, but also includes files on the Fort Peck Dam, on Ropes' disputes with federal agencies over financing of Montana mining ventures, and on New Deal polities. It also includes letters to and from members of his family, potential mine investors, political figures, government agencies, newspapers, and others about a wide variety of subjects. In addition there are biographical information (1935-1946); court papers (1910, 1940); financial records (1936-1951); legal documents (1928-1943) for several mining companies; reports (1896-1938) by Ropes and others on numerous mining properties; speeches and writings (1929-1952) on mining and politics; miscellany (1891-1947); and clippings (1928-1949).