EMPLOYEE CONTENDS HE REINJURED HIS LOWER BACK ON 2-13-03 ( NO SPECIFIC INCIDENT BUT WAS SORE AT THE END OF SHIFT) MANAGEMENT WAS NOT AARE OF THE RE-AGGRAVATED INJURY UNTIL 2-7-03. ORIGINAL INJ URY ON 12-29-02, EMPLOYEE WAS SHOVELING AND HIT A BOLT IN THE FLOOR CAUSING HIM TO FEEL A PULL IN HIS LOWER BACK. EE DID NOT SEEK MEDICAL ATTENTION AT THAT TIME.