HOISTING UNDER NORMAL CONDITIONS, THE NUMBER FOUR ROPE OF A FOUR ROPE SET ON THE LOADED SOUTH SIDE SKIP BROKE APPRORX 330' FROM THE SURFACE DUMP POINT. THIS BREAK WAS DETECTED BY THE ROPE SLIP INDICATOR AND FORCED THE HOIST INTO AN EMERGENCY STOP. INSPECTIONS OF THE AREA AND EQUIPMENT REVEALED NO ADDITIONAL DAMAGE. AT THIS TIME THE DECISION WAS MADE TO REPLACE ALL FOUR HOIST ROPES