Groundwater Levels In and Near the Duwamish River Valley, Washington
March 31, 2025
This web page displays groundwater-level data for selected wells monitored by the U.S. Geological Survey (USGS) in and near the Duwamish River valley, King County, Washington. These data are part of a project to better understand the geology and groundwater in and near the Duwamish River valley and how groundwater may contribute to flooding in the valley.
Key features include map-based data exploration, hydrographs from project wells, and filterable data downloads.
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Hydrogeologic Framework for the Duwamish River Valley to the Lake Washington Ship Canal, Washington
The Issue: King County has over 30 miles of coastline on the Puget Sound where coastal sea level rise and high tides can cause flooding. Many coastal areas have low elevations and are prone to flooding during high tides, extreme rainfall, and high streamflow. In addition, groundwater inundation—localized coastal flooding due to a rise of the groundwater table with global sea-level rise—may...
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Hydrogeologic Framework for the Duwamish River Valley to the Lake Washington Ship Canal, Washington
The Issue: King County has over 30 miles of coastline on the Puget Sound where coastal sea level rise and high tides can cause flooding. Many coastal areas have low elevations and are prone to flooding during high tides, extreme rainfall, and high streamflow. In addition, groundwater inundation—localized coastal flooding due to a rise of the groundwater table with global sea-level rise—may...