Wells-Lamson Quarry Company Inc · Caída a un nivel inferior, no clasificada en otra parte
VICTIM WAS OPERATING A TUGGER WHICH WAS ATTACHED TO A GROUT BOX, 1/2 FULL OF GROUT TO POSITION BOX FOR PERPENDICULAR LIFT BY THE QUARRY DERRICK. TUGGER PULLED OFF THE BASE-HOLD-DOWN PINS AND K NOCKED VICTIM OFF BENCH TO QUARRY FLOOR 18 FT BELOW. SAFETY LINES WERE PROVIDED, HOWEVER, THE VICTIM WAS NOT TIED OFF.