2009 Surface Water Design Manual Errata
The following links contain pages that are intended to be printed double-sided and to replace those pages in the manual. The user has the option of downloading individual pages for each chapter/appendix separately or all the changes for each chapter/appendix with one download for each chapter/appendix.
Chapter 1
Chapter 5
Elimination of Impervious Surface Percentage Exemption and Small Project Review Threshold
Since Washington State courts have thrown out the KCC 16.82 clearing limits, the Department of Ecology has determined that the County may no longer allow the impervious surface exemption in Core Requirement #3, Section 1.2.3, and the rural zone impervious surface limit criterion for the Small Project Review in Section 1.1.2.1. This change is effective as of March 22, 2010 and we plan to revise the text of the 2009 Surface Water Manual (SWDM) in an errata this fall to include this change.
For questions about the Stormwater Web Site, please contact Dale Nelson,Engineer II, King County Stormwater Services Section.
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