Rio Tinto Kennecott

As one of the largest copper producers in the United States, Rio Tinto Kennecott comprises approximately 11 percent of U.S. annual copper production. The Bingham Canyon Mine is one of the top producing copper mines in the world with production at more than 20 million tons.

The Bingham Canyon Mine is the largest man-made excavation on Earth. It measures two and three-quarter miles across at the top and three-quarters of a mile deep. If you stacked two Willis Towers (formerly the Sears Tower) on top of each other, they still would not reach the top of the mine. You could lay the soccer field at Rio Tinto Stadium in Sandy, Utah, end-to-end more than 38 times across the top of the Bingham Canyon Mine before it would reach both sides.