ALLEGED INCIDENT WAS TO HAVE OCCURRED WHILE THIS EE AND ANOTHER WERE CARRYING A 4"" I BEAM ALONG THE BELT. HE SLIPPED IN THE MUCK AND FELL STRIKING HIS RIBS AGAINST THE I-BEAM. EE DID NOT REPOR T INJURY UNTIL 12/29/02 AND STARTED MISSING WORKON 12-30-02.