2006 King County Flood Hazard Management Plan
King County, Washington
The 2006 Plan is a companion to the 2013 King County Flood Hazard Management Plan update.
The 2006 King County Flood Hazard Management Plan (Flood Plan) was adopted by the King County Council in January 2007. This functional plan of the King County Comprehensive Plan proposed a much-needed fix to King County's aging system of 500 levees and revetments that protect urban and rural floodplain residents, businesses, regional economic centers, public infrastructure and roads.
Many of the county's levees no longer function as originally designed 40 years ago. The November 2006 flood event, which resulted in a federal disaster declaration, highlights the urgent need to shore up King County's aging flood-protection system, as evidenced by saturated levees, sloughing, cracking and slumping.
Since it is not a question of if there will be a major flood event in King County, but rather when the next event will occur, King County proposed to fix these failing flood protection facilities to reduce the likelihood of future flooding disasters.
The 2006 Flood Plan recommended contemporary flood hazard mitigation strategies to reduce flood risks to tens of thousands of people, billions of dollars in economic infrastructure and major transportation corridors.
To address the backlog of maintenance and repairs to levees and revetments, the 2006 Flood Plan identifies a decade's worth of repairs and upgrades ranging from $179 million to $335 million and recommended the creation of a countywide flood control district to fund the plan.
- Read the Executive Summary [Adobe, 39K]
- View the January 16, 2007 flood plan presentation to King County Council
- View a two minute video of the November 2006 flood event [Windows Media]
The King County Flood Control District was established in April 2007 by the King County Council to protect public health and safety, regional economic centers, public and private properties and transportation corridors.
Download the plan here:
The 2006 King County Flood Hazard Management Plan is provided in Adobe Acrobat format with file size, in sections to enable faster downloads. For help using Acrobat, please visit our Acrobat Help page.
- Front Cover [ 755 Kb]
- Front Material [ 252 Kb]
Inside cover, acknowledgements, county representatives, table of contents, list of appendices, list of maps, list of tables, list of figures - Executive Summary [39 Kb]
- Chapter 1 – Introduction [43 Kb]
- Chapter 2 – Policies [64 Kb]
- Chapter 3 – Flooding in King County [228 Kb]
- Chapter 4 – Flood River Reduction Strategies and Tool [3.2 Mb]
- Chapter 5 – Basin Specific Characteristics and Action Plan [Adobe, 687K]
- Map 5-1 South Fork Skykomish River [600 Kb]
- Map 5-2 Upper Snoqualmie River [910 Kb]
- Map 5-3 Lower Snoqualmie River [1.4 Mb]
- Map 5-4 Tolt River [493 Kb]
- Map 5-5 Raging River [463 Kb]
- Map 5-6 Sammamish River [724 Kb]
- Map 5-7 Cedar River [1.1 Mb]
- Map 5-8 Green River [2.0 Mb]
- Map 5-9 White River [1.0 Mb]
- Chapter 6 – Implementation and Strategy [50 Kb]
- Chapter 7 – Funding [557 Kb]
- References [61 Kb]
- Glossary [57 Kb]
Appendices
- Appendix A – National Flood Insurance Program/CRS Activity 510 Crosswalk [526 Kb]
- Appendix B – Floodplain Management Regulations [55 Kb]
- Appendix C – King County Flood Risk Assessment [1.1 Mb]
- Appendix D – Accomplishments Since 1993 [165 Kb]
- Appendix E – King County Flood Protection Facilities [91 Kb]
- Appendix F – Action Plan [121 Kb]
- Appendix G – Flood Hazard Management Risk Areas [1.3 Mb]
Printed copies of the 2006 Flood Plan are available at the following public libraries:
- Auburn Library
- Bellevue Regional Library
- Bothell Regional Library
- Carnation Library
- Duvall Library
- Fairwood Library
- Fall City Library
- Issaquah Library
- Kent Regional Library
- Maple Valley Library
- Muckleshoot Library
- North Bend Library
- Redmond Regional Library
- Skykomish Library
- Snoqualmie Library
- Tukwila Library
For questions about the 2006 Flood Plan, please email wlr-rivers@kingcounty.gov.