RedactedNarrative: Alaska State Troopers say they were notified Monday morning of a death on the Big Susitna River.
  
  AST spokesperson, says the death reportedly occurred on the Big Susitna River near Flathorn Lake when the victim was attempting to set an anchor as his boat was drifting downriver. He was knocked unconscious by a sweeper and knocked into the water where he drowned. 
  
  Troopers responded and transported the deceased, who has not yet been identified, to the Deshka Landing, where it was turned over to the State Medical Examiner's Office for an autopsy.