Carl F. Bach (circa 1882-1959?) worked as a machinist in the western United States and was active in the International Association of Machinists (IAM) and was dismissed by the Santa Fe Railroad because of his union affiliation in 1914. His papers include bylaws, dues books, membership cards, and correspondence, 1908, 1913-1920, 1953

International Association of Machinists Local Lodge 89 existed in Cheyenne, Wyoming during the late 19th and into the twentieth century. The records includes minutes, financial records, correspondence, rolls and dues lists, administrative records of the Ladies Auxiliary, railroad maintenance booklets, and other general administrative records and items.