Dams aren't the infrastructure darlings they once were. Since 1999, 430 dams have come down, according to the American Rivers environmental group. The reasons are largely economic: Maintenance is high as the concrete walls age. Also, power needs can be supplied by other sources. The decline of migrating salmon and steelhead are also a factor.
These problems don't mean all dams are doomed or new ones will never be built. Dam defenders note that ...
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An article on removing dams (something I had really never thought or heard about) specifically on the Snake river with implications for other areas.
Flowing rivers are the veins of life for the ecosystem. The veins have been clogged without evaluation of the harm of dams upon the environment. ... More »
Irrigation/hydro-electric dams have two purposes. One is to create head to enable water to be sent down irrigation pipes or down generator ... More »
More questions than answers for me in this one. The totally green hdryo power alone is a huge impediment, not to mention the loss of shipping channels.
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