World’s Largest Dam Removal Unleashes U.S. River

World’s Largest Dam Removal Unleashes U.S. River

elwha-dam-removal-estuary
Elwha river, estuary. Photograph: © SAF — Coastal Care

Excerpts;

A construction crew on Tuesday detonated a large charge of dynamite, destroying the last remaining portion of Glines Canyon Dam and hastening the restoration of the Elwha River in the far reaches of the Pacific Northwest.

Part of the largest dam-removal project in the nation, the $325 million undertaking represents the beginning of a new era for the river, the surrounding ecosystem and those who come to experience it…

In Asia, Africa, and South America, large hydroelectric dams are still being built, as they once were in the United States, to power economic development, with the added argument now that the electricity they provide is free of greenhouse gas emissions. But while the U.S. still benefits from the large dams it built in the 20th century, there’s a growing recognition that in some cases, at least, dambuilding went too far—and the Elwha River is a symbol of that…

Read Full Article: “World’s Largest Dam Removal Unleashes U.S. River After Century of Electric Production,” National Geographic
The blasts will destroy the last 30 feet of the 210-foot-high dam and will signal the culmination of the largest dam-removal project in the world.
In Asia, Africa, and South America, large hydroelectric dams are still being built, as they once were in the United States, to power economic development, with the added argument now that the electricity they provide is free of greenhouse gas emissions. But while the U.S. still benefits from the large dams it built in the 20th century, there’s a growing recognition that in some cases, at least, dambuilding went too far—and the Elwha River is a symbol of that…

Read Full Article: “River Reborn: Elwha Flows Wild and Free Once Again,” NBC News
A construction crew on Tuesday detonated a large charge of dynamite, destroying the last remaining portion of Glines Canyon Dam and hastening the restoration of the Elwha River in the far reaches of the Pacific Northwest.

Sediment Trapped Behind Dams Makes Them ‘Hot Spots’ for Greenhouse Gas Emissions
The large reservoirs of water behind the world’s 50,000 large dams are a known source of methane. Methane has a warming effect 25 times more powerful than carbon dioxide. That knowledge led to questions about hydroelectric power’s image as a green and nonpolluting energy source…

New Global Warming Culprit: Dams
Washington State University researchers have documented an underappreciated suite of players in global warming: dams, the water reservoirs behind them, and surges of greenhouse gases as water levels go up and down…

Elwha, The Grand Experiment (11-12-2012)

DamNation; a Documentary That’s Testing the Waters of Corporate Social Responsibility; From Felt Soul Media
DamNation is a feature documentary, shown this week at SXSW in Austin, Tx. DamNation’s majestic cinematography and unexpected discoveries move through rivers and landscapes altered by dams, but also through a metamorphosis in values, from conquest of the natural world to knowing ourselves as part of nature…

Tracking Sediments’ Fate In Largest-Ever Dam Removal
Scientists tracking the aftermath of the largest dam removal in U.S. history say the dismantling of a dam in northwestern Washington state has unleashed about 34 million cubic yards of sediment and debris that built up for more than a century…

Let’s Talk About Sand: “Sand Wars” Film Director Denis Delestrac, At TEDxBarcelona

Controversial dam projects – in pictures, The Guardian UK
A look is taken at some of the world’s most contentious dam projects, from the Three Gorges in China to Brazil’s Belo Monte dam.

psds-elwha-dam-removal
Dam removal in process, Elwha river. Photo courtesy of: © Andy C., Program for the Study of Developed Shorelines (PSDS)

Coastal Care

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