EE WAS DRIVING STOCKPILE TRUCK AT #1 PLANT WHEN COMPLAINED OF LOWER BACK PAIN. HE BELIEVES THAT MOTION/RIDE OF TRUCK CAUSED HIM TO STRAIN LOWER BACK. EE HAD SEEN A DOCTOR BUT NO CONCLUSIVE RES ULTS WERE MADE. ON 6-4-02 EE CALLED IN & SAID THAT HE WOULD NOT BE IN (BACK WAS HURTING) & GOING TO DR'S OFFICE. DR SAYS HAS ABNORMALITY CALLED SPONDYLOLYSIS. MISSED 1 DAY.