Located in the state of Zacatecas, it is an underground mine that mainly exploits bodies of primary copper and zinc. Exploited mineral in this mine is extracted and crushed at a plant with a nominal capacity of 5,500 tons per day, to later be distributed in two floatation circuits, lead-zinc and copper-zinc. The final product consists of lead, zinc and copper concentrates with contents of gold, silver, lead, zinc and copper. A project is currently being developed in this unit to mine and exploit an important mineralized body of primary copper. The project consists of the development of a 6-kilometer access ramp and the installation of a crushing circuit, milling and extension of the current floatation plant with an additional nominal capacity of 10,000 tons per day.