RedactedNarrative: Reporting officer states the vessel was traveling on Nippersink Lake towards the channel which goes into Dunn''s Lake.  The operator was traveling at a high rate of speed.  Just south of the Dunn''s Lake channel entrance, unit 1 drove into the shore.  The vessel was about 15'' out of the water resting in brush and trees on an island owned by the state.  The operator was never located in the area.  Passengers reported she left with someone on a pwc.  The passengers were treated by EMS personnel and released as they had no apparent injuries.  It is thought that alcohol and excessive speed were causes.