10 mil pounds of salmon is about $30mil worth of salmon a year at today's retail prices. And more salmon would depress those prices. Economically speaking, the entire aboriginal catch is a drop in the bucket and not worth the benefit of a single dam.

For comparison, the US alone currently harvests 100's of mil pounds of salmon a year. Alaska alone produces 500mil pounds last year (and this was the lowest in decades). Norway harvests around 3 BILLION pounds of salmon a year.