AN UNINTENTIONAL ROOF FALL OCCURRED ON THE 1ST SOUTH TAILGATE #4 ENTRY, 3030 SOUTH. THE FALL WAS APPROX. 20 FT LONG, APPROX. 18 FT WIDE AND APPROX 8-10 FEET THICK. THE FALL DID NOT AFFECT VENT ILATION OR PASSAGE OF MINERS. THE FALL WILL BE FMINED THROUGH. FALL #18BB