Well the rivers down here generally have excellent habitat in the upper reaches and poor habitat in the lower sections much like the puget sound streams. I don't know why Skamania summer runs affect wild fish. I just know that during the mid- late 80's the South Toutle was the only sttream in southwest Washington to be meeting it's escapement goals. As soon as the Skamania fish were planted the Toutle failed to reach it's escapement goals inspite of WSR regs having been implimented. Conversely an increase in returning wild summer runs in the Wind river occured last summer it was also the first year of no Skamania fish influence. The jump was from an average of around 30 fish to 150 fish. Keep in mind also that the Skamania steelhead isnot the same as the Washougal strain fish. The skamania stock was concieved back in the 1970's where hatchery workers took the largest males and bred them with the largest females in an attempt to create a "super race" of steelhead. This program has a history of disease and other hatchery problems that has unfortunatly spread to the Washougals Wild fish most notably IHN.