FALL OF ROOF OR BACK at The Monongalia County Coal Company
A roof fall occurred in the #4 return heading leading to the 6 North Parallel Seals. The fall was approximately 80' long X 8' wide X 4' high. It does not impede air, or travel through the airway. The brow's are being supported and no other 50.20 criteria applies.
U.S. Mine Safety and Health Administration