Washington State Department of Transportation (WSDOT), Environmental Services Office (ESO)This is a view of the Pipes featureclass created with the following query: PipeType <> 3 AND LifeCycleCurrentStatus= 'Active' AND (WSDOTownership in ('Yes', 'Unknown') OR WSDOTownership IS NULL) AND SWLocationVerified = 'Yes' This feature class contains WSDOT's stormwater pipe ends. A pipe end is the end point of a pipe, which is a sub-linear enclosed conveyance designed and constructed to convey flow; it has a clear opening of less than 20 feet (see Hydraulics Manual, Chapter 8). The majority of the data collected so far are within the Phase I and Phase II 2009 NPDES Municipal Stormwater Permit Areas. This feature class has six subtypes: Culvert Pipe, Drain Pipe, Sanitary Sewer Pipe, Storm Sewer Pipe, Underdrain Pipe, and Unknown.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/f11265ad12c44b64bfd6da5da0d8a8cb_6engState of Washington Geospatial Open Data PortalPublicWSDOT - Stormwater Non-Culvert Pipe - Field [Washington (State)]Web servicesWashington (State)Last Modified: 2026-01-06