EE WAS ASSIGNED THE TASK OF HOSING THE LINE 11 FLOT ROUGHER JUNCTION BAX AREA. WHILE STRINGING HOSES FROM THE HOSE STATIONS LOCATED BETWEEN LINES 9 & 10 FLOTS, EE SLIPPED ON A SLIPPERY SECTION OF FLOOR GRATING NEAR THE ROUGHER BOX AREA ON LINE 10. EE TWISTED HIS KNEE. WAS EVALUATED BY A PHYSICIAN AND A SPLINT WAS APPLIED.