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Public Domain Picture: July 26, 2012 At the mouth of the Elwha River

Courtesy: US Environmental Protection Agency
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July 26, 2012 At the mouth of the Elwha River
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July 26, 2012 At the mouth of the Elwha River
USGS scientists and divers with the Lower Elwha Klallam Tribe, EPA, and Washington Sea Grant, went underwater to study the impacts to the Strait of Juan de Fuca now that removal of the Elwha River dams is well underway. The removal project is releasing sediment that has accumulated behind the dams for nearly 100 years. The flow and deposition of that sediment can have a variety of effects on marine plants and animals; including burial, inhibition of aquatic reproduction, light reduction, damage to animal gills and filter feeding structures, and alteration of species interactions with their different tolerances and responses to the sediment. For more information, see:, Photo of Steve Rubin, USGS, conducting a video transect along a permanent sampling station, revisited each year before, during, and after dam removal. See more photos and ask questions of EPA Divers at
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The file available on this page is a work of the United States government. A work of the United States government, as defined by United States copyright law, is "a work prepared by an officer or employee of the U.S. government as part of that person's official duties." In general, under section 105 of the Copyright Act, such works are not entitled to domestic copyright protection under U.S. law.
US Environmental Protection Agency

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US Environmental Protection Agency (Flickr Photostream)
External Site: US Environmental Protection Agency
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