King County GIS Center
King Street Center
201 S. Jackson St.
Suite 706
Seattle, WA 98104

+ 47.59909 N
- 122.33136 W

+ 47°  35' 56.72"
- 122° 19' 52.90"


Water Quality Swale

Description | Contacts | Attribute Information | Constraints

Data layer thumbnail image


Layer name: SW_WQ_SWALE
Subject category: utility
Title: Water Quality Swale
Feature Count: 0
Feature Type: Line
Abstract: Component Types-Basic biofiltration swale: A long, gently sloped, vegetated ditch designed to filter pollutants from stormwater. Grass is the most common vegetation, but wetland vegetation can be used if the soil is saturated. -Wet biofiltration swale: A variation of the basic biofiltration swale used where the longitudinal slope is slight (1 to 2 percent or less), water tables are high, or continuous low base flow is likely to result in saturated soil conditions. Under such conditions, healthy grass growth is not possible and wetland plants are used to provide the biofiltration mechanism.-Continuous inflow biofiltration swale: A biofiltration swale where water enters the swale continuously at numerous discrete inflows with no single inflow contributing more than about 10% of total swale flow.
Purpose: Linear feature, vegetated, and designed to spread water out over a large surface area. There are also different component types of swales as well.
Status: In work
Updated: Continually
Time period of content: (single date,as YYYYMMDD)::
Time period of content: (date range, as YYYYMMDD):: 20140521 -
Spatial reference: WA State Plane North
FGDC Documentation: Classic or FAQ
Open Data Availability: Not Available
Place Keywords: Pacific NW, King County, WA, Washington state,
Theme Keywords: utility, MS4, stormwater, drainage, Municipal Separate Stormwater Sewer System, NPDES Municipal Stormwater permit, utilitiesCommunication,
Lineage: Not available


Maintained by:
King County Stormwater Services Section
Primary: Jeanie Pride, GIS Specialist-Senior, 206-477-4803
(How to e-mail a County contact)
Secondary: KCGIS Center; This mailbox is monitored during business hours.

Attribute Information

_DBAssetID_DBAssetID is the unique identifier that is used to tie to Cityworks, MIS, or some other database. The DBAssetID is unique for each feature class and is generated by a script that runs nightly. Users should not modify the DBAssetID.
_SwaleType_Within the Swale ComponentType, Swale Type designates the specific function and configuration of a swale.
Basic Biofiltration
Wet Biofiltration
_Intent_Intent tracks whether the infrastructure was designed primarily to convey stormwater or a natural water body.
_SwaleDepth_The average estimated extent of a swale from top to bottom.
_Width_The average estimated extent of a swale from side to side.
_MeasSource_The source of the swale dimensions measurement.
_EngineeredLength_EngineeredLength tracks the swale length per the design from engineered plans.
Range Min:0.0
Range Max:325.0
_EngineeredWidth_EngineeredWidth tracks the swale width per the design from engineered plans. Use the bottom width (e.g. round to 2’ for the bottom width of 2.1’ below)
_OwnerEntity_OwnerEntity tracks the owner of the particular feature.
_InspectedBy_InspectedBy tracks the entity who inspects the asset.
_MaintainedBy_MaintainedBy tracks the entity responsible for maintenance of the asset.
_Jurisdiction_Jurisdiction tracks the jurisdiction that governs the land that the asset resides in but does not determine owership.
King County
_Revisit_Revisit tracks various reasons that a staff may need to revisit an asset.
_XYSource_XYSource tracks the method in which the geographic location of the asset was recorded.
Picked from aerial
_Confidence_Confidence provides users unfamiliar with the various data sources an indication in the accuracy of the data. The values range from 1-4 and are described below 1 = Survey or high quality GPS (we have none of this currently) 2 = Mapped in the field, or office mapped and reviewed in field. 3 = Office mapped from plans- not yet reviewed in field. 4 = Antiquated, not field visited, office mapped from a sketch- not yet reviewed in field.
1Highest quality location data verfied by survey and has complete attribute information
3Data source from georefenced sources in office but not verified in person.
2Data source inforamtion has been field verified by staff and attributes checked in the field. Location is also within acceptable tolerance
_ActiveDate_ActiveDate refers to the date when the asset is active in the ground.
_LoadedBy_LoadedBy tracks the staff member’s user name who added the feature to the database.
_LoadDate_LoadDate tracks the date that the feature was added to the database. Complete this date only if you are adding a new point.
_FieldVisitedBy_FieldVisitedBy tracks the staff member’s user name that last visited the feature in the field.
Brad Fuller
Joe Espinosa
Ron Ainslie
_FieldVisitDate_FieldVisitDate tracks the date that staff last visited the feature in the field.
_LastEditBy_LastEditBy tracks the staff member’s user name that last edited the feature.
Brad Fuller
Joe Espinosa
Ron Ainslie
_LastEditDate_LastEditDate tracks the date that staff last edited the feature.
_DateInstalled_DateInstalled tracks the date the feature was physically installed.
_DateRemoved_DateRemoved tracks the date the feature was physically removed.
_ForeignKey_ForeignKey is a value used to link to another database. The value you enter must match identically the value of the database that you intend on linking to.
_FKeySource_FKeySource is the source and name of the database that your foreign key is intended to link to.
_DataStage_DataStage tracks the status of the data as it moves through the QAQC process.
AcquireAsset still needs to be verfied
ProcessAsset has been verfied and needs to go through the QC process
_CurrentStatus_CurrentStatus tracks the status of the data as it moves through the lifecycle of an asset.
_DataSource_DataSource tracks the group, program, or process that added the data.
_MISComponentID_MISComponentID is used to track the Maintenance & Inspection System (MIS) ComponentID value for a feature.
_FacilityID_FacilityID tracks the FacilityID number that the feature is a part of.
_PlanLink_When digital plans are available, PlanLink provides a hyperlink to plan files.
_Notes_Notes provides extra space for staff to enter additional information not captured in other fields.
_QCFlag_QCFlag provides a space for QC scripts to write quality control issues for staff to potentially resolve.
_GlobalID_GlobalID is a 36 character string that ArcGIS uses to uniquely identify features or table rows within a geodatabase and across geodatabases.
_AssetID_An ObjectID is a unique, not null integer field used to uniquely identify rows in tables in a geodatabase. The values in this field are maintained by ArcGIS. The ObjectID is used by ArcGIS to do such things as scroll, display selection sets, and perform identify operations on features.
_PAA_PAA tracks which Potential Annexation Area an asset intersects, if applicable.
_Shape.STLength()_Shape is used by ArcGIS to store the geometry of a feature.


Access: None

Use: The information included has been compiled by King County staff from a variety of sources and is subject to change without notice. King County makes no representations or warranties, express or implied, as to accuracy, completeness, timeliness, or rights to the use of such information. This document is not intended for use as a survey product. King County shall not be liable for any general, special, indirect, incidental,or consequential damages including, but not limited to, lost revenues or lost profits resulting from the use or misuse of the information contained on this map. Any sale of this map or information on this map is prohibited except by written permission of King County. Drainage patterns or features are commonly altered to accommodate changes in development, so the information contained herein may not reflect current conditions.