Cobre del Mayo operates the Piedras Verdes open-pit copper mine in Sonora, Mexico. It produces copper cathode and sells refractory and vein type ore. Since being acquired in 2009, production has increased from 543 tons per month to over 5,000 tons through optimization initiatives. With 1.7 million tons of mineral resources and a mine life of over 17 years, Cobre del Mayo has been transformed into a stable, low-cost copper producer with long-term potential. Key agreements with off-takers and a $100 million credit facility help ensure continued operations.