Evraz Rocky Mountain Steel Mill is known as the first steel mill west of the Mississippi. The mill was established in 1881, and immediately began meeting the needs of steel and iron in the western territories and new rail systems. Soon after the first rail came out of the plant in April of 1882, the steel works began expanding to include nail production and spike, bolt and merchant bar mills. Evraz Rocky Mountain Steel Mill has narrowed its product focus to become a Specialty Product Mini Mill. Evraz Rocky Mountain Steel Mill, one of two divisions of Oregon Steel Mills, is headquartered in Pueblo, Colo. Oregon Steel Mills is one of the most diversified mini mills in the United States, producing a broad line of specialty and commodity steel products for domestic and global markets.