On 6/23/07, an unintentional roof fall occurred on the 1-A supply road, entry #6 at cross cut #30, on the 2nd West Sub Main off the 3rd South Sub Mains. The roof was supported with 10' point anchor bolts. the fall measured 20' long, 18' wide, and 12' thick. The fall will be cleaned up. The fall appeared to be broken stack rock.