3. The height at the accident scene was 65 inches. The No.3 Entry of the No.6 unit The Accident Scene The victims location at the time of the roof fall. Ten rows of permanent roof support were disturbed as a result of the roof fall. No. 25 Crosscut Click to animate Unsupported mine roof Previous coal face The unit was advance mining on 70 feet by 70 feet centers. The fall was 10 feet thick and 19 feet and 9 inches wide. The total length of the fall was not determined due to the area being inaccessible. Collapsed mine roof.