Mining
U. S. Steel’s Minnesota Ore Operations, located on the Mesabi Iron Range in northern Minnesota, is composed of two facilities: Minntac in Mt. Iron and Keetac in Keewatin. At these facilities, iron-bearing rock called taconite is mined and processed into iron ore pellets for use in U. S. Steel’s steelmaking facilities. Annual production capability at Minntac is approximately 16 million net tons of pellets, while Keetac can produce approximately six million net tons of pellets each year