ROOF FALL WAS FOUND BY FIRE BOSS WHILE MAKING RET. HE FOUND A FALL AT BRK 40 ON 7 SOUTH AT SPAD #17604. FALL WAS APPROX 20'WIDE, 80'LONG, AND 8'THICK. TOP WAS LAMINATED SLATE BOLTED WITH 6' POINT ANCHOR BOLTS. FALL WILL NOT BE CLEANED UP AND IS 10,000 FT FROM SECTION