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,The polygons are intended for use by the City of Seattle as planning-level tool for a preliminary understanding of the drainage patterns in particular areas of the City. The layer is not complete and does not reflect any City determination about how specific locations should be characterized. The delineation was based on drainage, land use, type of waterbody, and neighborhoods. Displays data from DWW.receiving_wtrbdy_plgn_pv with the following data query: RWB_NAME <> 'Urban Combined System'. Labels are based on the attribute NAME. This layer does not display when zoomed out beyond 1:400,000.,Refreshed weekly.,

This layer indicates which areas contribute sanitary and storm water flow to a CSO overflow point. Areas are broken down by NPDES Outfall Number. The data source is DWW.cso_basin_plgn_pv. The layer continues to be updated as new information about the CSO system becomes available and as modifications to the system are completed. The boundaries in this layer were created and updated for purposes of developing a hydrologic and hydraulic computer model. The model was used to estimate CSO control volumes and develop CSO control alternatives. Estimation of control volume and alternative analysis did not require a parcel level of detail, so it is expected that the boundary is not always correct at the parcel level. In addition, the CSO basin boundary shapefile reflects both the sewer basin AND the drainage basin tributary to the overflow point, and these two basins do not always line up cleanly. This layer reflects the best compromise between the two boundaries.,

SPU DWW Mainline Points is a Group Layer containing all Lifecycles, Ownerships, and other variations of Drainage and Wastewater Mainlines Points.,

,Data source is DWW.polygon_plgn_pv using the following definition query, PLY_LIFECYCLE_CODE IN ( 'C' ,'UNK', 'T', 'TBC', 'U', 'PC') AND PLY_FEATYPE_CODE = 'PND'. This layer does not display when zoomed out beyond 1:24,000. Labels do not display when zoomed out beyond 1:3,000 and are based on the attribute DESCRIPTION.,Refreshed weekly.,

SPU DWW Mainline Points is a Group Layer containing all Lifecycles, Ownerships, and other variations of Drainage and Wastewater Mainlines Points.,

SPU DWW Mainline Points is a Group Layer containing all Lifecycles, Ownerships, and other variations of Drainage and Wastewater Mainlines Points.,

SPU DWW Mainline Points is a Group Layer containing all Lifecycles, Ownerships, and other variations of Drainage and Wastewater Mainlines Points.,