A VOID WAS DISCOVERED IN THE INTAKE ROADWAY ON THE BELT TUNNEL PROJECT. THE VOID WAS CAUSED BY AROOF FALL ON AN UNDERLYING MINE(WMEFREDE #8) WHICH RESULTED IN THE INTERBURDEN CAVING IN & THUS CREATING THE VOID. THE VOID MEASURED 18' X 23' &WAS LOCATED 83' INBY SPAD # 1139.