How a useless dam nearly destroyed an iconic beach; CA

Posted In Dam, Erosion
Aug
31

elwha-dam
Elwha Dam removal, 2011. The largest dam-removal project in U.S. history—the Elwha River Restoration Project—commenced during the second week of September 2011, when National Park Service contractors began to dismantle two dams on the Elwha River in Washington State. The 32-m-tall Elwha Dam and the 64-m-tall Glines Canyon Dam, completed in 1913 and 1927, respectively, have been blocking the natural supply of sediment to the lower river and coast and severely limiting salmon and steelhead spawning for nearly a century. Captions: Jonathan A. Warrick / USGS. Photograph: © SAF

Excerpts;

Surfers’ Point appears to be a rare natural California oceanfront. But looks deceive.

The beach is man-made. It was built the length of five football fields with an 8-foot-thick layer of cobblestones topped with enough imported sand to fill nearly 2,000 dump trucks.

The city of Ventura and environmental groups like the Surfrider Foundation launched the $4 million beach-building project when the coastline eroded in the early 1990s because the Ventura River was no longer bringing enough sand and sediment to nourish the beach.

The sand thief was 16 miles upstream: Matilija Dam…

Read Full Article; E & E News (08-23-2017)

Dams – Cutting off our Beach Sand; By Gary Griggs (12-19-2014)

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

DamNation; a Documentary That’s Testing the Waters of Corporate Social Responsibility; Produced by Stoecker Ecological and Felt Soul Media” and presented by Patagonia.

Sediment Trapped Behind Dams Makes Them ‘Hot Spots’ for Greenhouse Gas Emissions (08-2013)

Undamming Rivers: A Chance For New Clean Energy Source; Yale E360 (08-07-2015)
Hydroelectric power is often touted as clean energy, but this claim is true only in the narrow sense of not causing air pollution. In many places, such as the U.S. East Coast, hydroelectric dams have damaged the ecological integrity of nearly every major river…

The Wrong Climate for Damming Rivers, A Video from Todd Southgate (05-26-2016)
Though large hydropower projects are often presented as a “clean and green” source of energy, nothing could be further from the truth…

Let’s Talk About Sand: “Sand Wars” Film Director Denis Delestrac, At TEDxBarcelona (©-2013)

Beach replenishment may have far reaching impacts on ecosystems;” Phys.Org (03-29-2016)
UC San Diego biologists who examined the biological impact of replenishing eroded beaches with offshore sand found that such beach replenishment efforts could have long-term negative impacts on coastal ecosystems…

Study: Sand nourishment linked to fewer marine life, Palm Beach Daily News (04-2016)
A recent study examining the impact of beach nourishment projects on marine life should provoke further research by local scientists, according to a Palm Beach Atlantic University biologist…

Green group questions beach renourishment costs, environmental effects; Myrtle News (04-11-2016)

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Coastal Care junior
The World's Beaches
Sand Mining
One Percent