HANDTOOLS (NONPOWERED) at Martin Marietta Materials Southwest Ltd
WHILE SUPERVISING ANOTHER EE REPAIRING EQUIPMENT, AND USING A 12# SLEDGE HAMMER, HAMMER BOUNCED BACK AND HIT THE FOREMAN IN FOREHEAD RESULTING IN UNCONSCIOUSNESS AND STITCHES IN FOREHEAD, CONC USSION.
U.S. Mine Safety and Health Administration