Snohomish CountyElevation isolines created from LiDAR bare-earth DEM. This feature class was derived from LiDAR survey contracted by the US Geological Survey between 2013 -16. More information is available by reading this report: Western_Washington_3DEP_Technical_Data_Report.pdf Scale / Resolution: 1:24000 Geographic extent: NE quadrant of Snohomish County Update frequency: As needed Last updated: 5/5/2018 Contact: GIS@snoco.orgArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/974f87be2d3e402d8182f8bf9831a3fe_0engSnohomish County Open Data PortalPublicContours 5ft NE [Washington (State)--Snohomish County]Web servicesWashington (State)--Snohomish CountyWashington (State)Last Modified: 2022-11-15