EE EXPERIENCED A REOCCURRENCE OF BACK PAIN AFTER CHANGING CUTTING EDGES ON A GRADER. INITIALLY HE THOUGHT THE PROBLEM WOULD RESOLVE SINCE HE'D HAD THE SAME PROBLEM FOR A NUMBER OF YEARS. HIS C ONDITION DID IMPROVE AND HE CONTINURED TO WORK SCHEDULED SHIFTS. DURING HIS NORMAL 7 DAY OFF PERIOD HIS PROBLME REOCCURRED AND HE SOUGHT MEDICAL ATTENTION ON OCTOBER 17, 2003. AFTER BEING EXA