Somewhere I have a copy of lenghtly independent study that was requested by the nmfs regarding this topic. It breaks down each watershed from the Wenatchee River north to the Canadian border. It supports your general ideas, and gives specific dates for the mass spawnings at Rock Island Dam (1939-1944), when ALL migrating fish were mass spawned. In my non-scientific backgroung (except having also taken Fish 101), and my family having fished the Wenatchee river for 3 generations there are no "native" fish. Yes, now that the clipped hatchery fish are endangered there will be an influx of "wild" fish because of the closed seasons increasing the amount of spawning fish.I ask, how can a human controlled fishery that gets 290,000 plants per year, and have a return this year way over the 10 year average be endangered? As a side note the Wenatchee opened for whitefish today and we only hooked 6 hatchery steelhead to go with our 6 whitefish on whitefish gear. Huh. must not be any steelhead left. Anyway, I will investigate this information for you. snit