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By Larry West, About.com Guide to Environmental Issues since 2005

Would Removing Dams Restore Wild Salmon Runs?

Tuesday August 12, 2008
Hydroelectric dams harnessed U.S. rivers and brought light into the darkness in a cleaner, more sustainable way than most other power plants could claim. But the dams also created an impenetrable barrier that blocked migrating salmon, making it impossible for them to reach the sea or return to their spawning grounds. Over the past century, many wild salmon runs have been decimated or destroyed, but today many dams are being studied for possible removal, which could create a new era of restoration for wild salmon runs. Learn more about the relationship between dams and salmon, and what can be done to restore wild salmon runs without turning out the lights.

Photo by Matthew Hull

Comments

August 23, 2008 at 4:24 pm
(1) guidoLaMoto says:

Amazing. I knew that dams kept aboout 25% of the fish from going back upstream to mate, and felt maybe that was an acceptabler trade-off for the electric power generated. But I had no idea 90% hatchlings were lost on the way back down. Mayne that rade-off isn’t worth it.
This is a good exaple of the continuing need for ongoing data collection and re-evaluation of all our engineering solutions.

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