- Snoqualmie/Skykomish Basin projects
- Cedar/Sammamish Basin projects
- Green River Basin projects
- White River Basin projects
Snoqualmie/Skykomish Basin projects
- Circle River Ranch Flood Risk Reduction Project - Project will identify and evaluate flood and channel migration risk reduction measures to reduce risks to the neighborhood.
- Dutchman Road Revetment Repair - Overview of a project to repair a damaged revetment on the Snoqualmie River near Dutchman Road.
- I-90 Flood Risk Reduction Project - project was identified to address potential I-90 flooding that could occur during a 50-year or greater flood event.
- Lower Frew Levee Setback Project - This project will reduce flood risks and improve habitat in and along the lower Tolt River.
- Lower Snoqualmie Valley Residential and Agricultural Flood Mitigation Project - A survey of flood impacts to farming operations is underway (May 2014) to increase understanding of specific flooding and erosion risks as part of this long-term project.
- Mason Thorson Ells Levee Rehabilitation Project - King County is partnering with the U.S. Army Corps of Engineers to repair a damaged levee on the Middle Fork Snoqualmie River near the City of North Bend.
- McElhoe-Pearson Habitat Restoration Project - A restoration project on the Snoqualmie River completed in 2012 to reconnect a high quality wetland to provide off-channel rearing and flood refuge habitat for juvenile salmon.
- Middle Fork Snoqualmie River Corridor Planning and Capital Investment Strategy- A comprehensive and strategic approach to conducting flood hazard-reduction projects in a way that optimizes expenditure of public funds to reach flood safety and habitat protection and enhancement goals and objectives.
- Reinig Road Revetment Repair - This project rebuilds approximately 775 feet of damaged revetment, designed to improve riverbank stability, increase resilience to river scour and erosion, accommodate future changes to the river channel, and provide a longer functional lifespan of the revetment.
- Shake Mill Left Bank Flood Risk Reduction Project - This project will provide protection to 428th Avenue Southeast and the North Fork Bridge along the Snoqualmie River by constructing a setback revetment.
- Sinnema Quaale Upper Revetment Analysis and Repair Project - A project on the Snoqualmie River to reconstruct approximately 1,100 feet of bank revetment to protect the Snoqualmie Valley Trail and State Highway 203 from ongoing erosion and slope instability.
- SE 19th Way Road Protection Revetment Repair Project - A project to realign a road that is threatened by riverbank erosion and to repair a revetment that protects the road.
- South Fork Snoqualmie Levee Improvement Project - An analysis of the river dynamics along the levied section of the South Fork Snoqualmie River to identify areas of weakness or concern within the levee system and define alternative actions to address them.
- South Fork Snoqualmie River Corridor Planning and Capital Investment Strategy - This planning effort will identify and prioritize a series of actions that reduce flood risk and are ecologically and financially sustainable.
- Snoqualmie River Hydraulic and Hydrologic Study - A study conducted in two phases (Snoqualmie River Hydraulic Study completed in 2016 and Snoqualmie River Hydrologic Study completed in 2017) that evaluated the effects of Snoqualmie Falls projects on downstream flooding.
- SR 203 Bridge Improvements Feasibility Study - A study to evaluate the opportunities, costs, and benefits of providing increased flood water flow through the SR 203 Bridge and road as you approach the bridge.
- Timberlane Village - In 2014, King County completed Risk Assessment and Recommended Actions in July 2014 to better understand river hazards in the area.
- Tolt Pipeline Protection Project - Also known as the Winkelman Revetment Reconstruction Project to protect a Seattle water pipeline.
- Tolt River Corridor Planning and Capital Investment Strategy - An assessment of the lower six miles of the Tolt River to inform future flood management decisions.
- Tolt River Level of Service Analysis - An analysis to evaluate up to three level of service alternatives that provide increased flood risk reduction benefits and are consistent with levee setback and improvement projects identified in the Tolt River Capital Investment Strategy (Tolt CIS).
- Tolt River Sediment Management Feasibility Study - A study to evaluate sediment management alternatives, including sediment removal and levee setbacks, to determine which alternative is a feasible and effective flood risk reduction tool for the lower Tolt River.
- Tolt River Road Northeast Elevation at San Souci - King County is exploring options to manage flooding at one location on Tolt River Road Northeast.
- Upper Snoqualmie Valley Residential Flood Mitigation - A project partnership with the cities of Snoqualmie and North Bend to take a comprehensive approach to identifying and prioritizing the flood mitigation needs in the upper valley.
Cedar/Sammamish Basin projects
- Cedar River Riverbend Project - A levee setback project to protect public safety and restore salmon habitat, construction planned for 2018.
- Cedar Rapids Levee Setback Repair Project - Completed in 2012 with a Determination of Non-Significance under the State Environmental Policy Act.
- Cedar River Corridor Planning - Beginning in 2014, a comprehensive plan for river projects on the Cedar River.
- Cedar River Gravel Removal Project - Dredging the lower Cedar River from the mouth of the Cedar River to the Williams Street Bridge in 2016.
- Elliott Bridge Reach Mitigation Project - A wetland and aquatic habitat restoration project being done to mitigate the affects of Washington State Dept. of Transportation projects.
- Herzman to Camp Freeman Project - A project to provide flood and erosion risk prevention along a stretch of the Cedar River about four miles east of Renton.
- Jan Road Levee Setback - This project is intended to protect residents, their property, and critical public infrastructure from flood and erosion risks along a stretch of the Cedar River approximately two miles north of Maple Valley.
- Maplewood Landslide and Flood Risk Reduction Feasibility Study - A project in the Maplewood neighborhood in Renton to analyze flood and landslide hazards and their potential interaction.
- Rainbow Bend Levee Removal and Floodplain Reconnection Project - A three-phase, high priority flood hazard management project completed in 2012 to eliminate flood risks to residents and provide long term protection to a major regional transportation corridor.
- Riverbend Mobile Home & RV Park Acquisition - An ongoing, long-term project to protect public safety from the risk of river channel migration.
- Sammamish River Bank Repairs - A bank repair project at two locations along the Sammamish River in Bothell.
- SR 169 Flood Risk Reduction Project - The project will replace two undersized culverts beneath SR 169 and the Cedar River Trail to reduce flooding and improve fish passage.
- Tabor-Crowall and Brodell Revetment Repair Project - The project will repair two revetments on the Cedar River to reduce flood risks to the Maple Valley Highway (SR 169), Cedar River Trail, local utilities, and private property.
- Willowmoor Floodplain Restoration Project - The project will alter the transition zone between the Sammamish River and Lake Sammamish in King County's Marymoor Park to improve natural complexity and habitat value while addressing maintenance costs and sustainable flood control.
- Momb Revetment Repair Project - This project will repair a damaged revetment on Issaquah Creek near Cedar Grove Road Southeast.
Green River Basin projects
- Black River Pump Station Improvements - Ongoing work to maintain and improve the pump stations that serves 24.8 square miles of the lower Green River basin.
- Briscoe-Desimone Levee Improvement Project - With funding from the King County Flood Control District, this City of Kent project seeks to reduce flood risks by installing a secondary flood protection wall behind the levee in four reaches of the river.
- Desimone Levee Repair Project – Repair of recent flood damage to the Desimone Levee in the City of Tukwila, to be completed by the U.S. Army Corps of Engineers in 2015.
- Dykstra Levee Repair Project – Repair of recent flood damage to the Dykstra Levee in the City of Auburn, to be completed by the U.S. Army Corps of Engineers in 2016.
- Fort Dent Levee Repair Project - Repair and stabilize the Fort Dent Levee on the Green River to provide flood risk reduction.
- Galli's-Dykstra Feasibility and Repair Project - The project will evaluate and address low areas along the levee.
- Green River System-Wide Improvement Framework (SWIF) - In Feb. 2016, and Interim SWIF Report was submitted to the U. S. Army Corps of Engineers for review following approval by the King County Flood Control District. This collaborative effort will produce a prioritized set of capital project and programmatic recommendations to achieve reach-specific, flood protection goals in a manner that builds economic, ecologic and community resiliency for current and future generations in the lower Green River valley.
- Gunter Levee - The Gunter levee provides flood risk reduction benefits to commercial areas of Tukwila. This project will assess existing levee conditions between river miles 15.9 and 16.8, develop and evaluate alternatives to meet flood hazard management objectives and consider other multi-benefit opportunities such as habitat and passive recreational enhancements.
- Lower Russell Levee Setback Project - This early action SWIF project will replace an old levee and revetment that do not meet current engineering design standards along 1.4-mile-long levee in the City of Kent.
- Reddington Levee Setback and Extension Project - Construction was completed in 2013 on this project to replace and extend a levee that protects Auburn and the Green River Valley, and create more flood storage and enhance ecological benefits.
- Teufel Mitigation Project - King County acquired the Teufel Nursery property to provide room for current mitigation needs as well as for future flood risk reduction and salmon habitat restoration work.
For more information about flood-related capital projects, please contact Katy Vanderpool, Policy and Planning Supervisor, King County River and Floodplain Management Section, Water and Land Resources Division, Department of Natural Resources and Parks.
Opportunities for public review and comment on King County River and Floodplain Management Section capital projects undergoing State Environmental Policy Act (SEPA) Environmental Review
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Capital projects mapped by 2010 census data including income, language, race and ethnicity.