AN UNINTENTIONAL ROOF FALL OCCURRED ON THE TAILGATE OF THE #9 WEST HEADGATE UNIT ENTRY #3 TO #2 AT 4025'WEST. THE FALL WAS APPROX. 30'LONG X 17'WIDE X 8-10'THICK. THE FALL DID NOT AFFECT VENTI LATION OR PASSAGE OF MINERS. THE FALL WILL NOT BE CLEANED UP.