The worlds deepest, biggest and deadliest open pit mines ...
The mine is miles (4,5km) across and mile (1,2km) deep. Since mining operations started in 1906, Bingham Canyon Mine has been the granddaddy of all copper mines. When you're talking about the actual size of the mine, Bingham Canyon is simply the largest copper mine in the USA. If the mine was a stadium, it could seat nine million people.