Reagan Dunn awards WaterWorks Grant to the City of Maple Valley to improve water quality in Cedar Downs

November 2, 2021

Summary

The King County Council approved funding for local WaterWorks grants Tuesday. Included in these grants is $116,000 for the City of Maple Valley to retrofit two existing stormwater detention facilities in Cedar Downs to improve water quality, awarded from King County Council District 9’s allocations of WaterWorks Grants.

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The King County Council approved funding for local WaterWorks grants Tuesday. Included in these grants is $116,000 for the City of Maple Valley to retrofit two existing stormwater detention facilities in Cedar Downs to improve water quality, awarded from King County Council District 9’s allocations of WaterWorks Grants.

"By directing this grant money to the Cedar Downs community project, we are going to be able to make significant progress in updating these facilities and work to improve flood protection for surrounding communities of Maple Valley,” said Dunn. “I am proud to have worked with my colleagues on the Council to ensure that these funds are prioritized.”

This project will retrofit two existing stormwater detention facilities that were designed and installed in the late 1970s and capture approximately 46 acres of stormwater runoff prior to discharging to Jenkins Creek. These facilities currently operate using a backup inlet, which tends to build up sediment quickly and fail, providing very minimal storage or treatment. The proposed project will install CDS units and biofiltration ahead of the detention facilities to provide enhanced treatment and reconfigure the inlet and outlet structures to better utilize storage capacity. The funding is specifically for the water quality aspects of this project, as this project will also require conveyance modifications.

“The City of Maple Valley is grateful for this funding provided by King County Councilmember Reagan Dunn,” said Maple Valley Mayor Sean P. Kelly. “Jenkins Creek is an important tributary to Big Soos Creek and the Green River and being able to implement this retrofit project with the help of these funds will allow the City to contribute to the improvement of the watershed as a whole.”

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