ON WEDNESDAY MORNING AT 4:26 A.M. A ROCK BURST (OUTBURST) OCCURRED IN THE 5500-31 EAST STOPE. THE DAMAGE WAS IN THE FOOTWALL ABOUT 20 FEET BACK FROM THE FACE AND 180 TO THE EAST FROM THE MAIN INTERSECTION; THE DAMAGE CONSISTED OF 20' OF THE FOOTWALL. ESTIMATED TIME TO REPAIR - 2 SHIFTS. THE MSHA FIELD OFFICE IN BOISE WAS NOTIFIED.