Southern Copper Corp a Delaware corporation was incorporated in 1952. The Company produce copper, molybdenum, zinc and silver. Its mining, smelting and refining facilities are located in Peru and Mexico and it conducts exploration activities in those countries and in Argentina, Chile and Ecuador. The Company has three reportable segments: Peruvian operations, Mexican open-pit operations, Mexican underground mining operations. Peruvian operations, includes the Toquepala and Cuajone mine complexes and the smelting and refining plants, industrial railroad and port facilities that service both mines. Sales of its products are recorded as revenue of the Peruvian mines. The Peruvian operations produce copper, with production of by-products of molybdenum, silver and other material. Mexican open-pit operations, includes the La Caridad and Buenavista mine complexes and the smelting and refining plants and support facilities that service both mines. Sales of its products are recorded as revenue of Mexican mines. The Mexican open-pit operations produce copper, with production of by-products of molybdenum, silver and other material. Mexican underground mining operations, includes five underground mines that produce zinc, copper, silver and gold, a coal mine that produces coal and coke, and a zinc refinery. This group is identified as the IMMSA unit and sales of its products are recorded as revenue of the IMMSA unit. The Company's Mexican operations are conducted through subsidiaries. The Company's Mexican operations are conducted through its subsidiary, Minera Mexico S.A. de C.V. (Minera Mexico), which it acquired in 2005. Minera Mexico mines and processes copper, molybdenum, zinc, silver, gold and lead. It operates through subsidiaries that are grouped into three separate units. Mexicana de Cobre S.A. de C.V. together with its subsidiaries, the La Caridad unit operates La Caridad, an open-pit copper mine, a copper ore concentrator, a SX/EW plant, a smelter, refinery and a rod plant. Mexicana de Cananea S.A. de C.V. together with its subsidiaries, the IMMSA unit operates ive underground mines that produce zinc, lead, copper, silver and gold, a coal mine and a zinc refinery. The Company operates the Toquepala and Cuajone mines high in the Andes Mountains, approximately 860 kilometers southeast of the city of Lima, Peru. It also operates a smelter and refinery west of the Toquepala and Cuajone mines in the coastal city of Ilo, Peru. The Company faces competition from other copper mining and producing companies around the world. The exploration, mining, milling, smelting and refining activities of the Company are subject to a number of Peruvian and Mexican laws and regulations, including environmental laws and regulations.