New Cornelia mine

The New Cornelia mine is a currently inactive open-pit copper mine in Pima County, Arizona, United States. It was the only productive mine in the Ajo mining district, and is located just outside the town of Ajo, which was built as a company town to serve the New Cornelia miners. The roughly circular pit is one and a half miles across at its widest point, and 1,100 feet deep at the center.

• http://en.wikipedia.org/wiki/New Cornelia mine