Good post, RBTW. I expected and hoped for a greater response as the Chilliwack-Vedder (CV) is the most fished river in the Province and is so prominent on this forum.
Perhaps your question is a bit to general … are you advocating for angling opportunity (ie. more fish to harvest) or, what’s best for the fish?
I believe each salmonid species in the CV has it’s own issues, although there is often much overlap. So if I may, let’s take it one species at a time … the fish most dear to my heart, steelhead. IMO this is “what needs to be done to sustain or increase runs”. I think I am with both angler and fish on this.
1) Fund enumeration studies - determine what we have. Data on wild steelhead populations, adult spawners especially, is limited (OK, very limited) and hatchery harvest, including released juveniles, is about the same. Until we have this data all else is pretty much irrelevant. Gotta know what you’ve got/had before you think/know you have a problem.
2) Fund yearly maintenance work for the optimal, multi species function of each of the off channel habitat restoration sites on the CV (Peach Creek, Centennial, Yukalup, Angelwing, Borden, etc)
3) Close CV to angling above Tamihi Creek starting Feb. 28/9 –July 1, until data from (1) above is analysed.
4) Insist a proportion of the gravel mined from the lower river is replaced to the upper river in areas lacking quality spawning gravel.