RedactedNarrative: V1 operator believes that he must have "beached the boat a little too high"  Officer suspected that the boat was taking on water to the stern of the boat as the operator was attempting to get the boat off the steep shoreline, causing the boat to sink due to the weight of water in the back of the boat.  The stern of the boat then took direct water over it causing the boat to be partially sunk at the shoreline.