To reiterate - the issue I raised isn't can the hatcheries do something productive, it's where will finding come from? In the US, particularly the Columbia there has been quite a concerted effort to rehabilitate salmon runs to the extent possible because of habitat loss and damage from Dam construction and operation. Large Utility Corporations and Dam authorities have been willing to fund hatcheries etc because it is a far less expensive alternative to drawing down impoundments, reconstructing tailways and fishways.
In Canada we don't have any organization with deep pockets willingly to pony up the funding. There is general opposition to more hatcheries from fisheries scientists and managers and most sport fishing groups. That it was tried once and was a failure at least economically, doesn't make it look like a sound idea.