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

Control Other Line [Washington (State)--King County]

King County GIS Open Data · 2026 Full Details

Full Details

Title
Control Other Line [Washington (State)--King County]
Description
For more information about this layer please see the GIS Data Catalog . Control Other Line Component Type---Infiltration Trench: 2-5' wide trench designed to infiltrate stormwater below the ground surface. They feature perforated distribution pipes that is topped with filter fabric to prevent dispersal to the ground surface.---Bioretention Swale: May have rocks in the swale, various plantings with a landscaped feature look. ---Dispersal Trench: 2.5' or greater trench designed to disperse stormwater to the ground surface. They feature perforated distribution pipes and a filter fabric trench liner to prevent infiltration. ---Basic Dispersion: Basic dispersion is the application of dispersion devices that utilize any available capacity of onsite vegetated areas to mitigate the runoff quantity and quality impacts from developed surfaces (i.e., impervious and non-native pervious surfaces). The requirements for basic dispersion are less restrictive than full dispersion in that any type of vegetation cover is allowed, the flowpath lengths through the vegetation are shorter, and there is no requirement to preserve native vegetated surface (e.g., forested surface) or minimize developed surface. As such, its mitigation of runoff impacts is significantly lower than that of full dispersion.---Full Dispersion: Features a native vegetated flowpath segment of at least 100ft (25ft for sheet flow from a non-native pervious surface) along the flowpath that runoff would follow upon discharge. The flowpath segment must be either onsite or in an offsite tract or easement area reserved for dispersion and should be designated as a "native growth retention area" on the flow control BMP site plan attached to the required declaration of covenant and grant of easement. Full dispersion involves use of splash blocks, rock pads, gravel filled trenches or sheet flow.
Creator
King County
Publisher
King County GIS Open Data
Temporal Coverage
Last Modified: 2026-01-08
Date Issued
2025-08-07
Rights
King County data are made available with the understanding that they shall be used exclusively by the obtainer or their authorized agents. 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 within this feature class. Digital products may not be reproduced or redistributed in any form or by any means without the express written authorization 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). Control Other Line [Washington (State)--King County]. King County GIS Open Data. (web service)
  • BTAA Geoportal Link

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