ON 7/21/03, A ROOF FALL WAS DISCOVERED ON #3 BELT LINE AND INTAKE AT SPAD 521. THE FALL MEASURED 100'LENGTH, 20'WIDE, & 10'THICK. 6'RESIN BOLTS & PIZZA POST WERE TYPE OF ROOF SUPPORT USED IN THIS AREA. THE FALL WENT UP TO A RUDDER SEAM AND THE AREA SHOWED SIGNS OF WATER. AREA WAS POSTED & DANGERED OFF. NON PRODUCING STATUS.