Web services > Washington (State)--King County > 2025-present

Water Quality Swale [Washington (State)--King County]

King County GIS Open Data · 2026 Full Details

Full Details

Title
Water Quality Swale [Washington (State)--King County]
Description
For more information about this layer please see the GIS Data Catalog . 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.
Creator
King County
Publisher
King County GIS Open Data
Temporal Coverage
Last Modified: 2026-01-08
Date Issued
2025-08-07
Rights
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.
Access Rights
Public
Format
ArcGIS FeatureLayer
Language
English
Date Added
January 09, 2026
Provenance Statement
The metadata for this resource was last retrieved from King County GIS Open Data on 2026-01-08.

Location

Cite and Reference

  • Citation
    King County (2025). Water Quality Swale [Washington (State)--King County]. King County GIS Open Data. (web service)
  • BTAA Geoportal Link

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