T in GH if you did August you would land right on top of the Summer Chinook. If you want to get a feel for what the real mortality for Chinook is in transition water is, ask Francis.

Seining is a tricky thing ( I did a lot of it years ago ) and mortality rates are dependant on location. In transition water you might as well gill net them as most will not survive to spawn. If you beach seine it is doable but it takes a lot of time and a proper location. If you rush it and bunch the herd the pressure in the net will literally squeeze them to death or run them out of DO. Never seen a commercial spend and extra half hour on a set to insure no mortality. That is not how they make money.