Vessel was fishing, anchored by the diversion.  Victim began to pull up anchor while attempting to steer and power his vessel away from the diversion and into the current.  Vessel struck a rock which spun the vessel around heading it down stream towards the diversion (large rocks).  Vessel was 1/3 to 1/2 throttle and victim was unable to regain control of the vessel and it struck the rocks on the diversion stopping the vessel suddenly.  Victim was thrown forward into the windshield frame of the vessel.  Victim broke and cracked his four upper front teeth.  Vessel received several scratches and dents on the hull.
Blackfoot                     