Brook trout are seen at the Rocky Reach Dam fish ladders.
The dam was completed in 1961, and has been since upgraded to produce 1287MW, or about as much as single modern nuclear power unit. Alcoa has a large aluminum smelter a few miles away, and has long term contracts on power from the dam.
Interestingly, Alcoa is buying the power alone, and not the "environmental attributes" of that power, meaning that the Chelan P.U.D. can resell the greenness of Alcoa's portion of dam power generation to gullible consumers in Portland.
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