Snake River wild fall chinook in 1998 returned to spawning grounds above
Lower Granite Dam in far fewer numbers than regional fisheries had predicted,
partly due to the way hatchery-origin "supplementation" fish
were counted at Lower Granite.
The final 1998 return number of 306 wild fish is the lowest since 1990,
when only 78 adult wild fall chinook passed Lower Granite. It compares
to a return of 797 fish in 1997.
Between 1992, when the wild fall chinook were listed …