King County Flood Control District home page
The King County Flood Control District is a special purpose government created to provide funding and policy oversight for flood protection projects and programs in King County.
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Investments by River Basin
Cedar / Issaquah / Sammamish River Basin
Green River Basin
Snoqualmie / S.F. Skykomish River Basin
White River Basin

Investments by River Basin

Seattle White River Basin Green River Basin Cedar/Sammamish/Issaquah River Basin Snoqualmie/South Fork Skykomish River Basin
King County Flood Control District River Basins
Seattle

About the Seattle Basin

The King County Flood Control District invests resources in Seattle to protect public safety, the regional economy and critical infrastructure.

White River Basin

About the White River Basin

The King County Flood Control District invests resources in the White  River Basin to protect public safety, the regional economy and critical infrastructure.

Green River Basin

About the Green River Basin

The King County Flood Control District invests resources in the Green River Basin to protect public safety, the regional economy and critical infrastructure.

Cedar/Sammamish/Issaquah River Basin

About the Cedar/Sammamish/Issaquah River Basin

The King County Flood Control District invests resources in the Cedar/Sammamish/Issaquah River Basin to protect public safety, the regional economy and critical infrastructure.

Snoqualmie/South Fork Skykomish River Basin

About the Snoqualmie/South Fork Skykomish River Basin

The King County Flood Control District invests resources in the Snoqualmie/South Fork/Skykomish River Basin to protect public safety, the regional economy and critical infrastructure.

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This conceptual map is for informational purposes only; it is in no way an official determination of flood zone status.

The King County Flood Control District invests in regional programs and projects to reduce the risk to people and property from river flooding and channel migration in King County. King County is home to several river watersheds that carry water flows from the Cascade Mountains to Puget Sound. These rivers pass through forested, agricultural and highly urbanized areas. Flooding is a significant threat. Floods most commonly occur in King County from November through February during periods of heavy rainfall and rapid snowmelt. Historically, King County rivers have flooded in every month but August. River flooding has led to 12 presidentially declared disasters in King County since 1990.

The King County Flood Control District makes investments in the following areas: Cedar/Issaquah/Sammamish River Basin, Green River Basin, Snoqualmie/South Fork Skykomish River Basin (including Raging & Tolt Rivers), Seattle and White River Basin.