Abstract Gustaf Carlson (1907-1996) was a Helena based mining engineer involved in mining in Montana, Idaho, Arizona, and Minnesota. This collection (1890s-1960s) consists of subject files on local mines including the Spring Hill (near Unionville), the Klondyke and the Sourdough (in Elkhorn); the East Pacific and the Kleinschmidt (near Townsend); the Drumlummon (near Marysville); mines in the Corbin and Wickes area; and other mines in Montana and Idaho. One of the larger subject files concerns the...

Abstract Helena, Montana, mining and geological engineer Leverett Ropes (1868-1953) was employed by various mining firms, by the federal government, and as a private consultant. This collection contains papers (ca. 1888-1952) concerning Ropes' mining engineering and geology consulting work and his interest in a variety of political issues. The general correspondence (1928-1952) concerns mines in Lewis and Clark, Jefferson, and Broadwater counties, Fort Peck Dam, his dispute with federal agencies over...