Perkins Lane W Retaining Wall Mitigation Project

Updated: June 6, 2024

What's Happening Now!

We have reached the 100% design milestone for this project and we anticipate construction to begin in the summer.

We will meet with community members and share scheduling details prior to construction. 


In coordination with Seattle CIty Light and Seattle Public Utilities, we're mitigating against landslides by constructing an approximately 180 feet long, soldier pile wall along the bottom of the slope on the east side of Perkins Ln W. 

THe soldier pile design has been selected to avoid the need for excavation into the slope and follows recent designs implemented during the landslide mitigation work along Rainier Ave S

Project Area

 Map showing position of wall at 2800 Perkins Lane W


SDOT maintains almost 600 retaining walls, most protecting public streets. The average height is 6 feet, and if all the retaining walls and seawalls were lined up end to end, they would extend for 21 miles.


Timeline showing we are in the pre-construction phase of the project

Design (Completion winter 2023/24): We’ll collaborate with stakeholders and community members to develop a more detailed final design.   
Construction (as soon as summer 2024): We will construct the project and keep the community informed on the latest construction updates, schedule, and expected impacts.   

Anticipated Construction Impacts

General construction impacts will include noise, dust, vibration, lane restrictions, and potential detours for people walking, biking, and driving.


The project is funded through the City's Landslide Hazard Mitigation Program and managed by SDOT's Street Use division.


June 2024: Public Presentation

June 2024: Final Plans

May 2024: Construction Notice


Greg Spotts, Director
Address: 700 5th Ave, Suite 3800, Seattle, WA, 98104
Mailing Address: PO Box 34996, Seattle, WA, 98124-4996
Phone: (206) 684-7623

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The Seattle Department of Transportation (SDOT) is on a mission to deliver a transportation system that provides safe and affordable access to places and opportunities for everyone as we work to achieve our vision of Seattle as a thriving, equitable community powered by dependable transportation.