RedactedNarrative: OPERATOR WAS MOTORING WITH HIS FAMILY AND FRIENDS, AT APPROX 3-4 MPH ON A NORTHWESTERLY HEADING ON THE SAN JUAN RIVER ONE MILE FROM THE CONFLUENCE OF LAKE POWELL.  OPERATOR WAS MOMENTARILY DISTRACTED AND STRUCK A PARTIALLY SUBMERGED OUTCROP OF ROCKS ON THE SOUTHERN BANK CAUSING DAMAGE TO HIS PORT BOW.  NOW DAMAGE WAS OBSERVED BELOW THE WATER LINE.  THE VESSEL WAS MOVED UNDER ITS OWN POWER FROM THE POINT OF IMPACT TO THE WAHWEAP MARINA DOCKS.  NO ONE WAS INJURED.  INVESTIGATOR OBSERVED DAMAGE TO THE PORT BOW OF THE HOUSE BOAT THAT WAS CONSISTENT WITH THE STATEMENT OF THE OPERATOR.