ON 9/20/04, EMPLOYEE SOUGHT MEDICAL TREATMENT FOR LOWER BACK PAIN. HE DOES HAVE A PRE-EXISTING BACK INJURY. HE WAS LAST OFF WORK ON 9/14/00 TO 11/06 DUE TO HIS CONDITION. HE BACKED OVER A ROCK IN A CAT D8R DOZER WHICH IRRITATED HIS PRE-EXISTING INJURY. HE IS CURRENTLY UNDER A PHYSICIAN'S CARE. NO DEFINITIVE DIAGNOSIS HAS BEEN MADE AT THIS TIME.