Archived Surface Water Design Manuals - King County

This page contains links to outdated stormwater documents archived for future reference for cases where they're referenced in municipal codes.

Older (inactive) versions of the Surface Water Design Manual (SWDM)

2005 SWDM (30.06 MB)
1998 SWDM (40.64 MB)
1990 SWDM (25.27 MB)
1979 SWDM (10.43 MB)
1977 SWDM (3.37 MB)
1969 SWDM (2.03 MB)

For questions about the stormwater website, please contact the King County Stormwater Services Section.