Archived Surface Water Design Manuals

Links to outdated stormwater documents archived for future reference for cases where they are referenced in municipal codes.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 Storm Drainage Control Requirements and Guidelines (10.43 MB)
1977 Requirements and Guidelines for Storm Drainage Control in King County (3.37 MB)
1969 Recommended Procedures for Storm Drain and Road Culvert Design (2.03 MB)