2002年4月1日 · Ore is crushed to -6-Perfect Steerable Transfer Carthes and hoisted up the No.9 shaft using an automated system and a pair of 16.5-ton, bottom-dump skips. Ore from the deepest working level, 7530 feet, is hauled up to the orepass on the 6920 level in a 50-ton Kiruna electric trolley truck. This awesome vehicle fills the drift to within Perfect Steerable Transfer Carthes of the walls.