Supposedly it was to keep flood silt from reaching the Delta Clearwater River and screwing up the coho spawning beds.
It didn't work and flooded other properties which had to be bought by some gov agency. It soon became a recreation site for
shooters, hunters and ATVs. now it's being filled in and covered with debris to prevent recreation. Nothing changes for the
spawning beds but AHTNA got a huge contract that they have screwed up.