EMPLOYEE WAS ASSISTING A CO-WORKER IN LIFTING A SEIVE TO ANCHOR OVERHEAD TO BE USED FOR SCREEN INSTALLATION, AND FELT PAIN IN HIS BACK. MEDICAL RECEIVED 7/10/02 SHOWS DEGENERATIVE CHANGES WITH OSTEOPHYTE FORMATION AND DISC NARROWING. THE EMPLOYEE HAS A MEDICAL HISTORY ASSOCIATED TO THE BACK DATING 1976 UP TO AND INCLUDING 2000.