Lake City Floodplain Park Development

Location

2318 NE 125th Street, Seattle 98125

Budget

The project’s construction contract amount is estimated to be $2.5 million.  

The site was jointly acquired between Seattle Parks and Recreation (SPR) and Seattle Public Utilities (SPU), and with grant funding from King County Conservation Futures. 

SPR has $700,000 secured through the Seattle Park District for planning, design, and construction.  

• King County Waterworks ($105,000) awarded to Mid Sound Fisheries Enhancement Group (MSFEG) for planning, design, management, and community engagement.  
• King County Flood Control District ($1,320,050) awarded to MSFEG for planning, design, management, and community engagement.
• King County Conservation Futures ($535,000) awarded to SPR for property acquisition.  
  Dept of Ecology Non-Point Funding ($500,000) awarded to SPR for construction.  

SPR, SPU, and MSFEG are working together to secure additional design and construction funding through various grant opportunities. 

Schedule

Planning & Design: 2021 - 2025
Construction: Summer 2026 - Winter 2026

Project Description

SPR is partnering with SPU and the non-profit MSFEG to develop a floodplain reconnection project benefiting water quality, in-stream, and riparian habitat, managing on-site stormwater, and creating an accessible natural area for the Lake City community, a heavily urbanized and underserved area.

The location of the property provides a unique opportunity for water quality and to reduce future flood losses. The goal of this project is to promote partnerships and enable high impact investments that will enhance water quality and wildlife habitat, help mitigate current and future climate-influenced flood flows and provide public green space in a racially diverse and underserved urban community. 

The parcel is entirely within the FEMA floodplain along 200ft of Thornton Creek channel, while also adjacent to a designated urban village. Floodplain reconnection and additional flood storage will provide climate resiliency in the future, while reducing the impacts of stormwater runoff into the creek, including water pollution and potential flood damage to residents along this section of the creek.

Restoring a stream to decrease flooding often involves widening the stream and increasing its complexity. Stream complexity can be achieved by adding bends to the stream channel, as well as by adding wood and other obstacles. Stream complexity slows water and creates pools where stream insects and fish can gather to rest and shelter from predators. Widening and increasing complexity slows the flow of water, decreasing erosion, and allows a stream to hold more water, decreasing flooding.

Site Description

Thornton Creek is made up of 18 miles of urban waterways running through southeast Shoreline through northeast Seattle where it enters Lake Washington. The Thornton Creek watershed is the largest in Seattle, covering approximately 12 square miles. Most of the water (including rainfall that picks up pollutants when it falls on roofs, streets, and parking lots) in those 12 square miles drains into Thornton Creek and its tributaries. As Seattle has grown and developed, Thornton Creek has been altered from its original path. Much of the creek and its tributaries have been straightened and its surrounding wetlands filled. A few sections of Thornton Creek have even been redirected through pipes underground. As a result of these changes, the creek's natural capacity to store water has been greatly decreased and it now suffers from frequent flooding and poor water quality. Over the years, this flooding has caused damage to public infrastructure such as roads and private property. In addition, decreased water quality has negatively impacted the health of the fish, birds, and other wildlife that live in the Thornton Creek watershed. Climate change is predicted to cause increasingly larger rain events, meaning even more water in Thornton Creek during storms and even more frequent flooding.

The land where the upcoming park will be, was previously privately-owned property, listed for sale in 2018. The community recognized it as an opportunity to create more green space in the Lake City community and to restore and protect Thornton Creek. In response to strong community advocacy and support, Seattle Parks and Recreation and Seattle Public Utilities jointly purchased the property to create a public park and restore the natural area.

Community Participation

For more information on this project, and to learn how you can contribute ideas, please visit lakecityfloodplainpark.com. We look forward to hearing from you!

August 2024 Meeting

• Recorded Presentation
• Concept Design Options