EE CO WORKER WERE HANGING MINER CABLE AND WATERLINE INT HE #5 ENTRY WHEN HE FELT A SHARP PAIN IN HIS BACK. HE WAS TREATED BY SECTION EMTS AND THEN TRANSPORTED TO LOGAN GENERAL HOSPITAL WHERE H E WAS DIAGNOSED WITH A SEVERE BACK SPRAIN. RECOVERY TIME IS UNKNOWN. NOTE ACCIDENT OCC ON 5-9 BUT DID NOT COME REPORTABLE UNTIL 5-13-02. DUE TO UNSCHEDULED WORK DAYS AND WAITING ON RESULTS.