OPERATOR WAS CLEANING GRIZZLEY BARS IN FEEDER. OPERATOR FELL APPROX. 15' HIT HIS HEAD ON ROCKS, 47 STICHES AND FRACTURED R. WRIST. 1) OPERATOR RAILED TO LOCK OUT AND TAG OUT.2) OPERATOR DID NO T WEAR HIS SAFETY HARNESS.3) OPERATOR USED UN-SAFE ACCESS.4)OPERATOR FAILED TO NOTIFY HIS CO-WORKER OF HIS ACTIONS. 5)OPERATOR FAILED TO BLOCK THE FEEDER.