Holiday closure Monday May 28: Most county offices will be closed in observance of Memorial Day.

Find comprehensive services, data and information related to stormwater and non-point source pollution in King County, Washington.

To offer a suggestion or report an error on the King County stormwater services and information website, please contact Fred Bentler, webmaster.
Stormwater Services and Information for King County, Washington

The 2009 Draft Update of King County Surface Water Design Manual (SWDM)


Click here or on the title above to download the draft SWDM (13 MB). The draft manual was provided to the public for review in October, 2008. The proposed changes to the manual are seen as track changes edits.

For the final version of the SWDM, the current 2009 Manual, click here or go to http://www.kingcounty.gov/environment/waterandland/stormwater/documents/surface-water-design-manual.aspx.

Files are available for download in Adobe Acrobat PDF format.

The 2009 Draft Update of King County Stormwater Pollution Prevention Manual (SPPM)

Click here or on the title above to download the draft SPPM (2.5 MB). The draft manual was provided to the public for review in October, 2008. The proposed changes to the manual are seen as track changes edits.

For the final version of the SPPM, the current 2009 Manual, click here or go to http://www.kingcounty.gov/environment/waterandland/stormwater/documents/pollution-prevention-manual.aspx.

For questions about the Stormwater Web Site, please contact Dale Nelson,Engineer II, King County Stormwater Services Section.

Related information

Agencies