Pinto Valley mine
|Gila County, Arizona|
The Pinto Valley Mine is a large copper mine located in Arizona, in the southwestern part of the United States. Pinto Valley represents one of the largest copper reserves in the United States and in the world, having estimated reserves of 446 million tonnes of ore grading 0.25% copper. It is located in Gila County, near the town of Miami.
- "Pinto Valley, United States of America". mining-technology.com. 2012. Retrieved 2013-07-23.