Since we are mentioning examples of successful hatchery operations the following article about the Baker Lake sockeye might be of interest.

The Baker sockeye that boast ancestry to the introduced fish that parented the hundreds of thousands of naturally spawning Lake Washington sockeye nearly faced extinction.

Although they will never flourish as a truly wild stock so long as the Baker Dams are in place without natural fish passage accommodations, they are now returning annually in numbers that are probably greater than those ever seen by mankind before.

And for this we can thank the PUD operated spawning and passage operations.

See: Seattle Post Intelligencer Article .