RedactedNarrative: Victim was kayaking and went over the low head dam in Keyser at the water filtration plant.  The kayak was caught and drawn back into the hydraulics and capsized.  Victim was ejected from the boat and remained in the hydraulic until he swam free and was swept downstream, where he was pulled to shore by unknown persons.  He refused transport to hospital by EMS, but later drove himself to the hospital.  Hypothermia, Low Blood PH, cuts and bruises.