Thurston GeoData CenterThurston County Hydro/Stream data originated as coverage file representation of the Thurston County hydro network. It included all waterbodies: rivers, lakes, ponds, inlets and streams. The features were digitized by the Thurston GeoData Center from the Thurston Comap, Assessor's Data dated 1990, and Tiger Files using rubber sheeting and aerial digitizing. Attribute information, including DNR Classifications and Naming, originated from Washington State DNR and Department of Ecology. In 2002-2003 the data was updated along Marine Shorelines using updated Aerial Photography. In 2011 the hydro coverage file were converted into feature class files during which process stream and river data was separated from other waterbodies; large river areas, lakes, ponds, and marine areas. The datasets were renamed to Streams and Waterbodies respectively. In 2014 some minor adjustments were made to both layers in the Lake Lawrence area as the result of LiDAR derived hydro enforced DEM data. Other changes that have been made to the data include Stream Name/Attribute information. These changes are made when authoritative information is received from USGS GNIS in regards the naming or renaming of streams. Future plans are in place for revisions to the data to more accurately reflect waterbody locations. Last Updated - February 28, 2017ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/3deea465d4e94195bebf6a79259dc368_0engThurston GeoData CenterPublicThurston Streams [Washington (State)--Thurston County]Web servicesWashington (State)--Thurston CountyWashington (State)Last Modified: 2025-05-05