The Los Bronces mine is a large copper mine located in central Chile, on the border of the Santiago Metropolitan Region and the Valparaíso Region. The processing plant is located at 3,300 m above sea level, with mining operations extending up to 4200 m above sea level. Los Bronces represents one of the largest copper reserves in Chile and in the world having estimated reserves of 3.13 billion tonnes of ore grading 0.32% copper.