Proposed Non-Mainlines

Active, proposed, abandoned and removed secondary sewer and storm pipes that are not part of the mainline system (i.e. side sewers, service drains, etc.). Side Sewers are wastewater pipes from buildings and establishments that connect to mainline pipes. Service drains are stormwater pipes from buildings that connect to mainline pipes. Probable flow is the derived use classification based on what is the best estimation of usage broken out by drainage and sanitary.Refreshed weekly.

Data and Resources

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Additional Info

Field	Value
Source	https://cos-data.seattle.gov/resource/p2v9-zr4j
Author	Allen Grissom
Last Updated	July 22, 2025, 19:46 (UTC)
Created	July 22, 2025, 19:46 (UTC)
Contact Email	mailto:mapgis.mapgis@seattle.gov
Contact Name	PublicUtilities_SeattleCityGIS
Geographic Coverage	-122.4192,47.3693,-121.7821,47.8600
Homepage	https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::proposed-non-mainlines
Issued	2024-06-17T23:17:44.000Z
Last Update	2025-07-22T01:21:57.373Z
License	<span style='font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px;'>The City of Seattle makes no representation or warranty as to its accuracy, and in particular, its accuracy as to labeling, dimensions, contours, property boundaries, or placement or location or any map feature thereof.</span>
Public Access Level	public
Publisher	City of Seattle ArcGIS Online
Theme	geospatial
Unique Identifier	https://www.arcgis.com/home/item.html?id=7542b9f543574bc8873789d8234523eb&sublayer=5
harvest_object_id	1b507cbe-f619-4e14-ac38-54f9229114fc
harvest_source_id	5365fd4f-4dee-4a64-8b1c-c2025205baa9
harvest_source_title	seattle