I have been a timber faller for 20 yrs and I know we take all the percations to avoid slides in streams.I havent cut a tree within 1000 ft of any stream in 15 yrs.and never even remotely close to any large rivers.Things are handled totaly different then in the past. If logging was the problem there wouldnt be a fish left on the oly. pen. That country has been hammered by the timber industry for years.I know it might have some affect but everyone still lives in wood houses even the people that bitch about timber harvesting. That is my opinion