For any one of a myriad of reasons it won't work in Puget Sound. Getting beyond ESA (increased mixed stock fishing) and Treaties (the tribes are entitled to half) there is the simple problem of water.

To run a hatchery you need high quality water. The amount varies depending on how long the young fish are reared but tuly large volumes of clean, unpolluted, disease-free waster is needed. And, you need land. Going to be expensive to buy land on some nice little inlet.