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View Diary: The Willamette Falls Locks closed for good after 138 years (120 comments)

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  •  They do effect salmon. (5+ / 0-)

    Yes, modern dams have fish ladders that allow passage of adults upstream.  The major problem is when the juvenile smolt attempt to migrate back to the ocean.  The pools behind dams create slack water that force the fish to swim more which causes stress.  Furthermore, invasive species such as bass introduced for sport fishing feed heavily on the smolts.  The dam itself tends futher kill fish when they get sucked through the turbines.  All sorts of schemes, including trucking of smolts downstream are only marginally effective.  

    Also, there needs to be an acknowledgement that all dams are not created equal.  Bonneville or Grand Coulee, say, aren't going anywhere, nor should they as they generate massive amounts of electricity.  Aging dams and run of the river dams (like the ones on the lower Snake) generate much smaller amounts of electricity.   Dams whose damage outweigh their benefits need to go.  

    I tend to vote for Democrats because they're not Republicans. I tend to hate Democrats when all they offer me is not being Republicans.

    by Fantastic on Fri Dec 09, 2011 at 10:52:10 AM PST

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