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The 2012 King County Site Management Plan was developed so that King County workers now have one manual of stormwater pollution-preventing best management practices (BMPs) to follow while conducting work activities throughout the county. These BMPs were drawn from a number of King County manuals and are minimum recommended standards. As such, SiMPla BMPs are not intended to supersede established, approved policies and procedures.

This manual also is intended to comply with Section S5.C.9 of the 2007 Phase I NPDES Municipal Stormwater Permit.

The 2012 King County Site Management Plan is provided in Adobe Acrobat format for compatibility with a wide variety of browsers and computer systems. It is searchable by the search function, and it has a bookmarked table of contents that makes it easy to quickly access different document sections and individual BMPs within those sections. For help with Acrobat, please see our Adobe Acrobat help page.

Download here:

Document sections:

The SiMPla is divided into these following BMP sections by kinds of work tasks:

Additionally, these sections of the SiMPla prevent stormwater pollution:

For questions about the King County Site Management Plan, please contact Blair Scott, Water Quality Planner III, King County Stormwater Services Section.