FALL OF ROOF OR BACK at Peabody Midwest Mining, LLC
A roof fall occurred in the 3B return at cross cut #8 in entry #1. The cause of the fall was weak laminated shale commonly referred to as stack rock. The fall was located in the #1 entry of the return for MMU-003. The fall was located adjacent to the walkway used by the weekly examiner.
U.S. Mine Safety and Health Administration