March 3, 2025
By Maddie Gard, WSG Science Communications Fellow
When the Elwha River dams were breached in 2011, a century’s worth of accumulated sediment was released and transported downstream to the coastal zone. An estimated 19 million metric tons of mud, sand and gravel that had been trapped in the dam reservoirs transformed twists and turns of the Elwha River, eventually flushing out to the coast and reshaping the river delta near Port Angeles. Since then, Washington ...
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