While conducting his weekly examination a fireboss identified a roof fall in the return on Detour Mains in the #1 entry one break inby spad #621. The fall was approx 20'X20'X4'-5'H and was supported with 4' fully grouted resin bolts the area was mined approx 8/1/11. The area will not be cleaned up the area has been dangered off and timbers have been set.