Abstract The Mike Ivers Park City mining collection (1885-1923) focuses on mining and labor in Park City, Utah, during a period in which unions worked to organize the mining industry. Included is a list of miners and their union affiliations. Also present are letters of recommendation with warnings of Industrial Workers of the World union membership, union circulars, a notice of Park City Citizens Alliance, documents regarding the 1919 strikes at the Silver King Consolidated Mining Company, and mining...