RedactedNarrative: VESSEL 1 APPEARED TO BE TRAVELING AT CRUISING SPEED FOLLOWING THE SHORELINE WITH THE DAM ON THE STARBOARD SIDE. VESSEL 1 FAILED TO TURN WITH THE CONTOUR OF THE DAM TO THE NORTH. VESSEL 1 MADE AN ABRUPT TURN TO THE PORT SIDE AND IMPACTED THE FACE OF THE DAM AT APPROXIMATELY A 45 DEGREE ANGLE. VESSEL 1 TRAVELED UP THE DAM 42'9" TO THE TOP WHERE IT STUCK THE WALL, AND TRAVEL ANOTHER 47'7" TO ITS RESTING PLACE ON TOP OF THE DAM FACING NORTH. OPERATOR AND PASSENGER FLED THE SCENE.