From space, the Earth looks like a smooth stone marble, blue-green, slowly revolving around the sun.But vision is quite different in the ground. Millions of years of tectonic upheaval and erosion, as well as thousands of years of human modification, have created a broken surface areas with steep, deep gorges and other great features. Prominent among these formations large holes that can be found around the globe.
Some of these holes are natural and others are made by men. Most of these depressions are no problem for the man, though sometimes large holes have appeared in cities with stunning measures.Today we speak of one of these "holes": the Bingham Copper Mine .
Nothing inspires a person to dig as big as the promise of big money hole. This is exactly what prompted the owners of Utah Copper Company to purchase a portion of Bingham Canyon, Utah, on June 4, 1903 .The excavation began in 1906 when workers began using steam shovels, conveyor belts, trucks and trains to tease out the hundreds of tons of ore mined per day.
This mineral was not only copper , there were also gold and silver. After more than 100 years of excavation, mine shaft measured 2.73 miles (4.4 kilometers) wide and 0.7 miles (1.2 kilometers) deep and is the largest excavation ever made by man. The mine has produced about 18.7 million tons of copper, which has also been the most productive mine in the world.