Thurston GeoData CenterThurston County Basins and Watersheds. The watershed shapefile is created from the allbas coverage (basins) and shares the same metadata. This data is approved by the WA State Department of Ecology. The layer should be used as a general reference for basin delineation and not as an absolute.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/5501e897e55b427e98ae11862bd201cc_0engThurston GeoData CenterPublicThurston Watersheds [Washington (State)--Thurston County]Web servicesWashington (State)--Thurston CountyWashington (State)Last Modified: 2025-05-05