El Volcan is a surface mine located near the town of Rosario in Mexico's state of Sonora. The mine is owned and operated by ArcelorMittal, supplying the company's Lazaro Cardenas steel facility. After more than one year closed, the El Volcan operations were resumed in the first quarter of 2017 as a result of a revised mine plan in light of improved price conditions. El Volcan's ore is trucked roughly 120 kilometres from the mine site to its processing plant outside the city of Ciudad Obregon, before being railed to the company's port in Guaymas. This makes costs at the operation much more sensitive to changes in diesel prices than would be typical of other operations in the area.