Sub Basin 23.2 Watercourse Stabilization

August 2025

This week, construction of the stream bed stabilization was completed with the placement of mulch and erosion control measures. A new rock-lined ditch was installed to carry water from an existing pipe on West Mercer Way to the existing stream bed. The contractor will return in October to perform replanting and landscaping.

April 2025

The City received three bids for this project and is currently in the process of finalizing a contract. Construction is scheduled to begin in June 2025 and is expected to continue through early fall.

February 2025

The City has received the final plans and specifications for the project and is now preparing it for bidding. The construction is planned for summer 2025.

April 2024

Final design comments were sent to the consultant to incorporate into plans and specifications. 

May 2022

The project received its Hydraulic Project Approval (HPA) from Washington Department of Fish and Wildlife on April 20. The HPA states that any work below the ordinary high water line (OHWL) of the stream shall be conducted between June 1 and September 30. This timing limitation is also known as the “fish window”. Therefore, obtaining the necessary permit from the US Army Corps of Engineers (USACE) in-time is key to having this project constructed this year within the timing limitation. As of the end of April, the USACE could not estimate a permit decision date citing lack of resources. The USACE indicates that it is in the process of hiring additional project managers to handle their workload.

February 2022 

The project is currently in permit review with the US Army Corps of Engineers (USACE). The agency has been requesting design-related clarifications and the design team has been responding accordingly.

In December, SEPA review application was submitted. Public Notifications sent to the neighborhood on 1/10/22, with the public comment period ending on February 9th.