The I.B. Mining Company, located at Bannack, Montana, was a gold mining operation incorporated in 1929 by I.B. Haviland, Carl Becker, and C.W. Stalling. In 1931 the company began quartz mining of low-grade gold ore. Collection includes incoming, outgoing, and interoffice correspondence (1929-1933) relating to the operation of the company; plus lesser amounts of financial records, organizational records, etc. The company went bankrupt in 1933.