Lower Skagit

Watershed Hydrology

The Lower Skagit Watershed (HUC 17110007) covers an area of approximately 1,160 square miles in northwest Washington State. The watershed is characterized by a diverse hydrology that includes streams, wetlands, and lakes. Snowpack in the area varies depending on elevation with higher elevations receiving more snowfall. Surface water in the watershed is primarily supplied by the Skagit River, which is the largest river in the area. Reservoirs in the watershed are used for hydroelectric power generation and water supply. Interesting climatic facts include the area's mild, wet winters and dry summers. Trends over the past few decades show increasing temperatures and precipitation. The Skagit River is home to several species of salmon and steelhead, making it an important resource for both recreational and commercial fishing. The watershed also supports a variety of wildlife, including bald eagles and black bears.


Surface Flows

Lower Skagit Watershed

Snowpack Depths

Lower Skagit Watershed

Dams & Reservoirs

Lower Skagit Watershed

Groundwater Levels

Lower Skagit Watershed

Lower Skagit Rivers

Rivers of the Watershed