Here is a link to a preliminary report presented to the Commission in August 2015 focusing on smolt mortality: http://wdfw.wa.gov/commission/meetings/2015/08/aug0715_06_presentation.pdf.

Of particular interest are pages 31 to 40 comparing various river systems. Difficult to comprehend how the Nisqually has water quality issues whereas the Snohomish does not.
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It's the person who has done nothing who is sure nothing can be done. (Ewing)