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The Yanacocha gold mine is currently operating on 26,000 hectares (about 63,700 acres), high above the city of Cajamarca in the Andes mountains of Peru. But that is just a small area: The government conceded a total of 282,000 hectares (690,000 acres, slightly , larger than the state of Rhode Island) to Minera Yanacocha, a company comprised of majority owners Newmont Mining of the United States and Minera Buenaventura of Peru. Yanacocha continues to be a significant part of Newmont Mining’s global production, contributing about a quarter of the 5.3 million ounces of gold Newmont sold in 2007.

Minera Yanacocha is working aggressively to expand the mine. In 2004, the mine began exploring for gold on Cerro Quilish, a small mountain that comprises the top of the watershed supplying the city of Cajamarca and the rest of the valley. Dairy and potato farmers in the area and many others opposed to mining Quilish blocked the road to the mountain in 2004. There were weeks of violent confrontation between police and protesters. In the end, Minera Yanacocha stated publicly that it had underestimated the concerns of local people and asked the Ministry of Energy and Mines to revoke its permit to explore for minerals on Cerro Quilish.

In northern Peru, local governments, community leaders, and farmers say the proposed Rio Blanco Copper Mine would be devastating to local communities. In an area where drinking water is already scarce, pollution from the mine would be an environmental disaster for the entire region.