FROST WAS IN THE MATERIAL THAT HAD BEEN CRUSHED THE PREVIOUS DAY. MATERIAL WAS BEING RELOCATED FROM THE DISCHARGE PILE OF THE CRUSHER. THE TOP OF THE PILE WAS FROZEN. IN REMOVING THE LOWER AR EA OF THE DISCHARGE PILE, THE TOP OF THE PILE CAME DOWN AND CRUSHED OUR EE'S ANKLE AND FOOT. AT THE TIME OF INJURY, HE WAS MAINTAINING THE CRUSHER.