US-based Newmont Mining, one of the world's largest gold producers, is engaged in the acquisition, exploration, and production of gold and copper properties. The company has regional operations in Peru and Suriname. In Peru, Newmont controls the Yanacocha gold mine, the largest gold producer in Latin America. With three active open pits, production has exceeded 26Moz since the mine opened in 1993. The company also holds a stake in the Minas Conga gold-copper deposit, owned by Peruvian mining company Yanacocha, a JV operation between Newmont and local mining company Buenaventura. Newmont suspended construction at Conga in late 2011 due to violent protests over water use. Since then, Minera Yanacocha has been working on reservoir projects at the site to quadruple the local water supply. Newmont was founded in 1921 and is based in Greenwood Village, Colorado. It also had a 44% stake in the La Herradura mine in Mexico, which was sold to Fresnillo PLC in 2014.