Bingham Canyon Mine is the biggest mine in the world. It is an open pit mine based in the state of Utah, USA and is known for its copper production. The mine itself is estimated to hold around 19 million tons of copper across the 1900 acres of land. Bingham Canyon Mine is 1200 metres deep and has 2500 employees in total. 25% of the copper in the US is produced by Bingham Canyon Mine.