Sonar in GH can count fish as done in Alaska and other places the problem is that we flood which really limits any location. Sonar cannot tell you which fish species it is counting as three salmon species can and are likely are present at the same time in GH. While information like 1000 fish went through yesterday is interesting it is particularly useless in GH because of the three species being present at the same time. Add to that is the fact that Nov river conditions would make it nearly impossible keep a sonar operational with mud & debris. It can and should be used where the streams and run timing permit but Grays Harbor isn't it.