I'll ask the question again. If the streams where culverts were replaced have good habitat, is there a reason they can't be planted to re-seed them?
The creek below my place has terrible habitat. They plant it every year with chum fry. They don't successfully spawn, but if I recall correct they got over 1K adults back last year as well as some coho which I believe are strays.
If it had good habitat, I think those chums and coho could reproduce.
Everything used to get planted back in the day. Why not today? Is it a lack of funding or just a lack of desire?
SF