Grasberg Open Pit Copper Mine Tembagapura Ore from both operations is transported by conveyor to centralized mine facilities feeding a combined daily average total of some 225 000t of ore to the mill and 135 000t to the stockpiles Production equipment includes 30m³ 42m³ buckets a 170 strong fleet of 70t 330t haul trucks together with 65 dozers and graders with radar GPS and robotics used in the mine s state of the art