Elwha River dam removal (2011-2014)
Crews removed the Elwha and Glines Canyon dams from the Elwha River in Olympic National Park. It was the largest dam removal in U.S. history at the time.
Sediment moved downstream and salmon began returning to stretches blocked for decades.
The project became a reference point for river restoration and fish passage.
It shows dam removal can reopen habitat, but recovery takes years of monitoring.
