EMPLOYEE CLAIMS THAT HE PULLED A MUSCLE IN HIS LOWER BACK WHILE ASSISTING ANOTHER EMPLOYEE TO MOVE A COUNTERWEIGHT FROM A SCREEN IN THE CRUSHINGAND SCREENING AREA. THE COUNTER-WEIGHT WEIGHED ABOUT 100 LBS. THE EMPLOYEE WAS SEEN BY HIS PERSONAL PHYSICIAN ON 12/25/01 AND RESTRICTED FROM DUTY UNTIL 12/28/01.