If memory serves, Hood Canal was a "preserve" for salmon with no commercial fishing allowed until Boldt. At that time, the tribes with U&A inside the Canal could begin fishing. In an effort to maintain the commercial net fishery and comply with Boldt, there was a concerted effort to increase chum production; chum being a commercial fish with little rec interest. There were quite a few chum facilities built during that era.

Hindsight suggests that might not have been wise.