A SMALL ROOF FALL WAS DISCOVERED AT THE MAIN PORTAL ABOUT 30' FROM THE SURFACE. THE FALL CONTINUED INTERMITTENTLY UNTIL ABOUT 40' OF ENTER HAD BEEN FILLED WITH LOOSE MATERIAL. CASTLE DALE, UT, MSHA OFFICE WAS NOTIFIED AT 8:00 AM. ALL EMPLOYEES WERE ACCOUNTED FOR AND A RECOVERY PLAN WAS MADE ADN POSTED ON BOTH ENDS OF THE CAVE.