Featured Image: Dredging in the Washington Park Arboretum, removing near-shore wetlands that provided critical fish and wildlife habitat. (Museum of History and Industry, Seattle)

Historical shoreline vegetation has been lost through landscape alteration and urbanization, severely impacting habitat that migrating salmon and other native aquatic organisms require.

The conversion of the Duwamish River into an industrial waterway has left a legacy of chemical contamination that has resulted in its designation as a Federal Superfund site. American Rivers has identified Green-Duwamish River as the fourth most endangered river in America in 2019.