EE ALLEGES HE WENT TO ASSIST WITH LOADING A LOADER BUCKET TOOTH & AS HE LIFTED & MOVED TO LOAD THE TOOTH INTO A TRUCK, HE FELT PAIN IN HIS LOWER BACK. HE DID NOT MENTION THE PAIN TO HIS SUPERV ISOR UNTIL HOURS LATER AT WHICH TIME HE STATED HE EXPERIENCED PAIN AT THE SITE OF A PRIOR INJURY IN HIS LOWER BACK.