RedactedNarrative: Both children wearing PFD''s, ages 3 and 6.  Operator smelled of alcohol and history of drug abuse.  Operator refused blood draw.  County attorney felt not enough probable cause for search warrant blood draw.  Raft capacity of 300 pounds / 3 persons.  River forked into 3 channels and channel taken had a total blockage by trees on a blind curve.  Raft and all occupants sucked into log jam where boat capsized.  Operator and 6 year old swept into log jam. 3 year old pinned under jam.  Raft had camping gear for an overnight stay on river.  Cell phone lost in river.  CPR initiated on scene by operator - hiked to ranch and borrowed phone to call for help.  CPR continued to hospital.  Pronounced after brain death.  No scene photos taken.  Operator and friends cut away log jam morning after incident.