RedactedNarrative: Vessel #1 had been towing a cooler behind the kayak on a swimmer's tube attached by a rope.  While paddling downstream, the rope got caught on a strainer below the water line and pulled Vessel #1 underwater.  The operator of Vessel #1 was able to get free of the kayak and was assisted by other nearby kayakers.
  
  Vessel #1 has not been recovered.