Monitoring River Impacts of Elwha and Glines Canyon Dam Removal in Olympic National Park

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Monitoring River Impacts of Elwha and Glines Canyon Dam Removal in Olympic National Park Monitoring River Impacts of Elwha and Glines Canyon Dam Removal in Olympic National Park Elwha Dam June 16, 2011 prior to removal Raven flights: June 18 -22 2012 Photo and information courtesy of Bureau of Reclamation In the year 2000, the Department of the Interior purchased Elwha and Glines Canyon Dams in preparation for their removal to support river and fish habitat restoration. The primary monitoring and research objective for the Elwha River Restoration Project is to produce a scientifically sound technical narrative describing what happened to the fish, reservoir sediment, and the reservoir topography and vegetation during and following dam removal. This restoration project is unique because the removal of the two Elwha Dams represents the largest controlled release of sediment in the history of North America and it encompasses an entire watershed (from Olympic Mountains to the Strait of Juan de Fuca). Oblique Raven UAS image of Upper South side of Glines Canyon Dam during Lake Aldwell near Elwha Dam removal, October 2011 South side of Glines Canyon Dam before removal Lower section of Lake Aldwell near Raven Imagery over Glines Canyon Dam Elwha Dam Below: Imagery of the former Lake Aldwell and the Elwha River. These images, collected from various sources show sediment movement and river changes resulting from the draw down of both Elwha and Glines Dams. Former Elwha Former Elwha River boundaries River boundary Bing Maps Aerial Imagery Fixed Wing Aerial Imagery Raven UAS Aerial Imagery Fall 2011 March 2012 June 19, 2012 The Department of the Interior – U.S. Geological Survey, Bureau of Reclamation and the National Park Service explore the potential of UAS technology for monitoring fish, river sediment, and vegetation changes during one of the largest controlled releases of sediment in North American history. For more information: http://uas.usgs.gov .
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