By: Steven Schauer, Deputy Executive Director
The Cedar River is an essential natural and recreational resource for King County residents, but it also poses a flood risk to nearby communities and infrastructure. To safeguard people, property, and the environment, the King County Flood Control District (KCFCD), in partnership with King County as the service provider, is preparing to repair the Tabor-Crowall and Brodell revetments. These structures, located along the right bank of the Cedar River, were damaged by flooding in 2020. Repairs are being designed now, and construction is anticipated to begin in the summer of 2026.
What is a revetment, and why is this project necessary?
A revetment is a structure designed to prevent riverbank erosion by using rocks, wood, plants, and other materials. Revetments protect critical infrastructure, such as highways and utilities, while also supporting fish and wildlife habitat. The Tabor-Crowall and Brodell revetments are crucial to reducing flood risks to the Maple Valley Highway (SR 169), Cedar River Trail, local utilities, and private properties. If left unrepaired, continued erosion could lead to costly emergency repairs and damage to public resources.
Project Overview
The Tabor-Crowall Revetment is located just upstream of the Riverview Park footbridge, while the Brodell Revetment is situated farther upstream, near SR 169 and Shelton Avenue Southeast. Notably, the Brodell Revetment also surrounds a fishway that allows salmon and other fish species to access a tributary of the Cedar River. The upcoming repair project will restore these essential structures, helping to mitigate flood risks while maintaining and improving fish habitat.
“Helping to protect our communities from flooding is a top priority,” said De’Sean Quinn, King County Flood Control District Supervisor, District 5. “The repairs to the Tabor-Crowall and Brodell revetments are a crucial step in safeguarding people, infrastructure, and our environment. By investing in these repairs now, we’re not only reducing flood risks but also preserving vital fish habitat and ensuring the long-term resilience of the Cedar River.”
Project Goals
- Reduce flood risks to protect people, community resources, and infrastructure.
- Enhance habitat for salmon and other fish species through the addition of native vegetation and large wood placement.
- Minimize disruption to the Cedar River Trail and nearby parks during construction.
- Reduce traffic impacts on the Maple Valley Highway to limit inconvenience for local commuters.
Site Context and Project Design
The project area, located along a highly active portion of the Cedar River near State Route 169, requires careful planning to balance safety, environmental, and community considerations. The repair work will occur between river miles 2.7 and 3.4, allowing for efficient use of permitting and construction resources by addressing both revetments at the same time.
To ensure a long-lasting and environmentally responsible solution, the project will incorporate:
- The replacement of invasive blackberries with shade-producing native vegetation to support fish and wildlife.
- The strategic placement of large wood in the river to improve habitat conditions.
- Construction plans that consider the high level of recreational use along the Cedar River Trail.
Reagan Dunn, Chair of King County Flood Control District, added, ” The King County Flood Control District is committed to proactive solutions that balance public safety and environmental stewardship. The Tabor-Crowall and Brodell revetment repairs are critical not just for the communities along the Cedar River, but for the entire region. State Route 169 is a vital transportation corridor that connects residents and businesses across multiple districts, and protecting it from flood damage is essential. This project ensures the long-term stability of key infrastructure while also supporting environmental restoration efforts.”
Construction and Community Impacts
Repairs are expected to begin in the summer of 2026. The work will require temporary changes to traffic and trail access, including:
- Lane reductions on the Maple Valley Highway.
- Temporary closure of the left turn lane at SE 5th Street.
- Detours for Cedar River Trail users to ensure safety during construction.
The King County Flood Control District is committed to keeping the community informed and minimizing disruptions. These repairs will ultimately protect vital infrastructure, maintain safe access to community resources, and enhance the natural environment along the Cedar River.
For more information and project updates, visit the project website.