Morenci Mine Leached Material Dumping.
Giant ore trucks dumping leached material back into the Morenci mine, the largest strip mine in North America. Source:
Morenci is one of North America’s largest producer of copper and one of
the largest open-pit mines in the world. It is one of the world’s largest
producers of copper cathode from SX/EW.
Freeport McMoRan Copper & Gold Inc.
FCX is a leading international mining company with headquarters in
Caterpillar Inc. is a United States-based corporation headquartered in Peoria, Illinois. Caterpillar is, according to their corporate website, "the world's largest manufacturer of construction and mining equipment, diesel and natural gas engines, and industrial gas turbines."
CAT 797F Haul Truck.
The Caterpillar 797 is an off-highway, ultra class, two axle, mechanical powertrain haul truck developed and manufactured in the United States by Caterpillar Inc. specifically for high production mining and heavy-duty construction applications world-wide. The 797 is Caterpillar’s largest, highest capacity haul truck. The latest version, the 797F, offers one of the largest haul truck payload capacities in the world, up to 400 short tons (363 t).
Wikipedia: Caterpillar 797.