STEPPING OR KNEELING ON OBJECT at Lafarge North America
Employee was working on tire dock loading tires from the trailers to the feed system. Reports that as ee was walking into the trailer that ee had half of left foot on the trailer and the other on the air dock. As ee moved forward, foot slipped off the dock into the trailer causing all of weight to go onto the back of left heel rolling left ankle.
U.S. Mine Safety and Health Administration