The Tintic Standard Reduction Mill—also known as the Tintic Mill or Harold Mill—built in 1920, and only operating from 1921 to 1925, is an abandoned refinery or concentrator located on the west slope of Warm Springs Mountain near Goshen, Utah, in the United States. Metals processed at the mill included copper, gold, silver, and lead, all of which were received from another mill near Eureka, Utah. The metal content of ore was increased through the process to make transportation less expensive.