I didnt read all the recommendations, I did see they want to add a certain amount of fish to that system, I dont know how involved the hatchery is, with that part of the project. The important part, was that it said that recommendation is not the only part of the solution. Habitat for example. The fact that they have that line to indicate the spawning area of the fall kings, raises questions how can we supplement that. Im not a biologist or anything related to science. I just know that you dont go backwards cause you havent got a clue how to go forwards.
Your analysis doesnt mean they dont have anyone looking at the watershed to develop a plan that will increase spawning pair and production. I mentioned nets, seals and habitat. I dont know what creek run into the main river. I dont know how the river floods or what dries up in the summer and those are required to proceed, with an egg box program. If they have the same gene pool as the Tule kings, I would ponder if its feasable to transfer a dozen pairs of fish and let them find some gravel. As long as they cant get out, they will probably find gravel.