EE WAS OPERATING BACKHOE. HE STOPPED WORKING AND WENT TO STEP OFF EQUIPMENT. WHEN HE STEPPED DOWN TO GROUND, HE TWISTED HIS LEFT KNEE. EE REPORTED THE INCIDENT TO HIS FOREMAN, BUT DID NOT GO TO THE DOCTOR UNTIL 8/6/04 (X-RAYS) AND AGAIN ON 8/10/04. STRAINED KNEE. KNEE IMMOBILIZER & LIGHT DUTY WORK. DOCTOR'S REPORT RECEIVED 9/8/04.