AN UNINTENTIONAL ROOF OCCURRED ON C-2 MAINS NO. 1 ENTRY INTERSECTION & CROSSCUT AT SURVEY STATION, NO. 4680. THE FALL WAS APPROX 50'LX17'WX7'H. THE AREA CONTAINED 5' RESIN TENSION BOLTS AND WAS DEVELOPED MAY 2000. THE FALL WAS DANGERED OFF AND THE APPROACHES CRIBBED.