EMPLOYEE WAS PUTTING NEW STEEL INSIDE COAL MILL FROM THE TOP TO PATCH OLD STEEL. INSIDE THE MILL WAS VERY TIGHT QUARTERS ABOUT 30"" DIA. AS HE WAS WORKING HE BUMPED/ HIT RIGHT ELBOW. EE WAS INJURED ON 4/16/02 BUT DID NOT REQUEST TO SEEK MEDICAL ATTENTION UNTIL 5/3/02.