Rich ...this ain't Montana..we are not known for our huge runs of large native Rainbows. There is plenty of river above the hatchery for the natives to swim around in free of any Sockeye predation (even though that is one of your mistakes). The Sockeye fry go straight to the lake and don't hang out in the river eating native steelhead and salmon fry. You are misguided blaming the sockeye hatchery for the predation you are crying about. The trout may be the culprit.