The Operator of Vessel 1 was paddling downstream when Vessel 1 made contact with a log jam in the river, pinning Vessel 1 against the logs and swamping/capsizing Vessel 1.  The Operator of Vessel 1 was ejected into the water during the incident and Vessel 1 was then lost downstream.  The Operator was able to self-rescue to shore with no injuries while Vessel 1 was never recovered.
 
According to the responding EMS, several boaters in the area had capsized and  self-rescued on the date of this accident.  The normal CFS at the location for this time of year is roughly 100 CFS; on this date it was approximately 1050 CFS.
Howard