FALL OF ROOF WAS DISCOVERED ON 5-22-03 AT 14:OO HRS BY (MINE FOREMAN) IN THE SOUTH WEST MAIN BLEEDER PANEL AT SS#452. THE FALL MEASURED 150' LONG BY 20 WIDE WAS BOLTED WITH 5 FT. TENSIONED ROOF BOLTS. FALL DID NOT ALTER VENTILATION, NO EQUIPMENT INVOLVED AND WILL NOT BE CLEANED UP.