RedactedNarrative: OPERATOR OF U1 STATED HE WAS COMING INTO SHORE TO SEE IF A FRIEND WAS ON SHORE. HE NOTICED HE WAS NOT AND HE TURNED BOAT TO GO AWAY FROM SHORE. OPERATOR THEN COLLIDED WITH A DOCK AND BOAT LIFT. OPERATOR STATED HIS SPEEDS WERE 15 MPH AND THERE WAS A SLIGHT WIND. WEATHER REPORTS STATE 5-8 MPH WINDS. OPERATOR LEFT THE SCENE AND BROUGHT HIS BOAT INTO BOATHOUSE NEARBY AND DID NOT NOTIFY AUTHORITIES OF ACCIDENT. DOCK WAS COMPLETELY FLIPPED OVER AND LIFT SUBMERGED IN THE WATER.