EE WAS HOOKING UP A SLING TO RAISE A CONVEYOR BELT COUNTERWEIGHT, HE WAS ATTMEPTING TO STEP OVER A CRANE OUTRIGGER ARM AND BUMPED HIS LEFT KNEE. HE INITIALLY DID NOT REUQIRE ANY MEDICAL TREAT MENT. HE REPORTED ON 6-12 THAT HIS KNEE WAS STILL BOTHERING HIM WHEN HE CLIMBED STAIRS, AND SUBSEQUENT DIAGNOSTIES FOUND CARTILAGE DAMAGE IN THE LEFT KNEE. HE WAS OPERATING ON 6-14 TO REMOVE