EE CALLED IN TO OFFICE ON 3-7-02 THAT HE WOULD NOT BE REPORTING TO WORK BECAUSE HE HAD INJURED HIS BACK WHILE SHOVELING MUD AND TWISTING TO PLACE IT ON A CONVEYOR BELT. EE SOUGHT TREATMENT AT THE LOCAL ER AND WAS REFERRED TO OCCUPATIONAL PHYSICIAN. ON 3-7-02 OCCUPATIONAL PHYSICIAN PLACED EE ON RESTRICTED DUTY FOR A LOWER LUMBAR STRIN, PHYSICIAN ALOS PRESCRIBED RX. EE ON LT. DUTY.