ON 12-26-02 EE WAS ASSIGNED DUTIES AS AN OILER ON #136 B/E 280-B COAL SHOVEL. HE WAS WORKING BETWEEN THE HOIST DRUM AND THE ELECTRICAL LUBE SYSTEM BREAKERS, WHEN HE CAUGHT HIS FOOT ON A PROTRU DING PIPE AND TWISTED HIS RIGHT KNEE. HE WAS DIAGNOSED WITH MEDICAL MENISCAL TEAR, AND RETURNED TO WORK AT HIS NORMAL OPERATOR DUTIES. HIS KNEE CONTINUED TO BOTHER HIM, AND SURGERY WAS SCHEDU