{{source}}Input datasets: Washington State Department of Natural Resources: Transportation 2011 (roads only); Non-DNR Major Public Lands (2014) Washington State Department of Ecology: NHD 2014 (not pipeline, coastline, or Grays Harbor artificial path); HUC-12 WatershedsArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/cb97299ee66e48ceb224f9e0ef103bd8_1engState of Washington Geospatial Open Data PortalPublicChange in Roads/SqMi [Washington (State)]Web servicesWashington (State)Last Modified: 2018-12-14