skydriftin - "Less than a quarter mile upstream there were falls impassible to fish." I've never heard that one. I don't really think a project of this magnitude and importance would be considered if that was the case.

In everything I've read they talk about 70 miles of river which will be opened up to salmon and steelhead to spawn.

More info: http://www.nps.gov/olym/issues/isselwha2.htm
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'Tis a strange and bewildering place. Often, a steelhead will take on the first cast, and at other times, one can beat the water to a froth and swear a fish was nowhere near. --Bob Heirman