INJURED STATED THAT AS HE WAS WORKING ON THE RAWCOAL SCREEN IN THE PREP PLANT THE WRENCH SLIPPEDAND HE HIT HIS LEFT ELBOW. INJURED CONTINUED WORKING AND ON 8-12-03. WAS GIVEN MEDICATION FOR TH E SWELLLING IN HIS ELBOW. INJURED WENT TO DR. ON 8-15-2003 FOR OBSERVATION. RETURN TO THE DOCTOR AGAIN ON 8-22-03. WAS GIVEN MEDICATION BY IV DAILY FOR A WEEK. SURGERY PLANNED. DID NOT BECOM