THE ROOF AT E 13,650 N 12,000 (THE S-CURVE ON THE WAY TO 5 WEST) FELL. THE MINE SUPERINTENDANT HEARD THE FALL AND WENT TO INVESTIGATE. APPROXIMATELY 200 TO 400 TON OF ROCK FELL IN THE ROAD ALM OST BLOCKING THE ROADWAY. THE MEN THAT WERE PASTTHE BLOCKED OFF SECTION WERE BROUGHT OUT USING THE ESCAPE LADDER BETWEEN C & B LEVELS. THE ROADWAY WAS CONED OFF. NO ONE WAS INJURED.