EE SAID THAT HE HAD PICKED UP 2 40-50 LB. WET BAGS OFF THE TRACK AND CARRIED THEM OVER TO THE DRILLED HOLES, HE SAID; THAT HE HAD SET ONE OF THE BAGS DOWN TO DUMP THE OTHER BAG AND WHEN HE TURNED TO PICK-UP THE 2ND BAG AFTER DUMPING THE 1ST HE HAD A SHARP PAIN GO UP HIS BACK. DAMAGE TO HIS BACK UNKNOWN AS OF YET.