RedactedNarrative: Vessel 1, with two persons on board, was being paddled when Vessel 1 tipped sideways and capsized.  Both Occupants were ejected from Vessel 1 and swept downstream by the current.  The Operator of Vessel 1 became trapped under the debris and was held underwater for approximately 5 minutes.  A Good Samaritan pulled the Operator (Victim) from the water and began CPR.  The second Occupant was able to self-rescue to shore.  Emergency services arrived on scene and transported the Operator (Victim) to the hospital where they were treated and released the next day.