Dungeness-Elwha

Watershed Hydrology

The Dungeness-Elwha watershed (HUC 17110020) spans approximately 1,020 square miles in northwest Washington. The area is characterized by a diverse range of ecosystems, including lowland forests, subalpine meadows, and alpine tundra. The watershed is fed by several rivers and streams, including the Dungeness River and Elwha River, which provide critical habitat for various fish and wildlife species. Snowpack levels in the area vary depending on elevation, with higher elevations receiving greater amounts of snowfall. Surface water in the watershed is affected by the two major reservoirs, Lake Mills and Lake Aldwell, which were created by the removal of the Elwha and Glines Canyon dams. The removal of the dams has resulted in significant changes to the hydrology and ecosystem of the watershed. Interesting climatic facts and trends in the area include a warming trend and an increasing frequency of extreme weather events, such as heavy rain and snowfall.


Surface Flows

Dungeness-Elwha Watershed

Snowpack Depths

Dungeness-Elwha Watershed

Dams & Reservoirs

Dungeness-Elwha Watershed

Groundwater Levels

Dungeness-Elwha Watershed

Dungeness-Elwha Rivers

Rivers of the Watershed