EE WAS CALLED FROM THE SHOT TO TRAM TO THE FILL WHERE THE TRUCKS WERE DUMPING TO PUSH THE FILL OVER. WHEN HE GOT TO THE FILL HE REPORTED THAT HE HAD RUN OVER A ROCK AND HURT HIS BACK. HE FINIS HED HIS SHIFT BUT DID NOT RETURN THE FOLLOWING DAY. PRELIMINARY DIAGNOSIS - LOWER BACK SPRAIN.