RedactedNarrative: O1 was fishing approximately 20 yards northwest of the causeway inlet and holding his position with his trolling motor. 01 inadvertently turned off his trolling motor (V1 was bow into current facing north). After loss of power V1 did a 180 degree turn to port side and got pulled into the mouth of the causeway inlet and wedged between the riprap rocks. Damage to rear port side, back, and bottom from contact with riprap rock. No injuries to people on board (see diagram and pictures attached.