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Underdrain and Rain Garden
Underdrain piping systems are provided to prevent prolonged ponding of stormwater or to collect and convey water to another facility. Rain gardens are less engineered systems... -
Peat Settlement-Prone Areas
Peat settlement-prone areas. Peat settlement-prone areas consist of Category I and Category II peat settlement-prone areas that are delineated on Maps A1 through A26, Peat... -
DWW Swales
A polygon feature class showing DWW Swales. It also provides information about its exact location, owner, and role. Swales (biofiltration, bioretention,... -
DWW Mainlines (Permitted Use)
DWW Mainlines (Permitted Use) displays all connected or to be connected mainline pipes within the City of Seattle (and the former service area north of the city limits)... -
Non-Mainline Detention Polygons
Detention systems associated with non-mainlines. -
DWW Pipe Repairs
DWW Repairs displays the location of all pipe rehabilitation work performed on SPU pipes within the City of Seattle (and the former service area north of the City limits). Data... -
Drainage and Wastewater Private Mainlines
This layer displays all connected or to be connected drainage, sanitary, and combined mainline pipes within the City of Seattle (and the former service area north of the City... -
Other GSI Footprints
Each polygon has an associated drain line feature that is used to show the basic direction that drainage flow may be travelling during a storm event. -
GSI Facility Footprints
In the polygon data, Facility Footprints details the footprint of the swale, permeable pavement, and rain garden features. -
Permeable Pavement
Permeable pavement is a paving system which allows rainfall to percolate into an underlying soil or aggregate storage reservoir. -
DWW Pipe Repairs
DWW Repairs displays the location of all pipe rehabilitation work performed on SPU pipes within the City of Seattle (and the former service area north of the City limits). Data... -
DWW Swales
A polygon feature class showing DWW Swales. It also provides information about its exact location, owner, and role. Swales (biofiltration, bioretention,... -
Contour Lines 1993
A line feature class showing 2 ft. and 10 ft. elevation contours. Derived from 1993 digital orthophotos - has not been updated. Because of the size of this dataset, we do not... -
GSI Points
The drainage structures represented in the GSI points are not all unique to GSI, however, they are specifically part of SPU GSI projects. -
Underdrain and Rain Garden
Underdrain piping systems are provided to prevent prolonged ponding of stormwater or to collect and convey water to another facility. Rain gardens are less engineered systems... -
GSI Facility Footprints
In the polygon data, Facility Footprints details the footprint of the swale, permeable pavement, and rain garden features. -
Peat Settlement-Prone Areas
Peat settlement-prone areas. Peat settlement-prone areas consist of Category I and Category II peat settlement-prone areas that are delineated on Maps A1 through A26, Peat... -
GSI Points
The drainage structures represented in the GSI points are not all unique to GSI, however, they are specifically part of SPU GSI projects. -
Non-Mainline Detention Polygons
Detention systems associated with non-mainlines. -
Seattle City Limits
City of Seattle municipal boundaries. Includes northerly and southerly boundaries for the city. The easterly and westerly boundaries of the city are defined by waterbodies.