Perkins Lane W Retaining Wall Mitigation Project
Updated: January, 2024
What's Happening Now!
We have reached the 100% design milestone for this project, and we will add the final plans to this webpage in the coming weeks. Construction is anticipated to begin in the summer of 2024 and conclude later in the year.
We will share details with community members prior to construction.
Overview
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
Background
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
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.
Funding
The project is funded through the City's Landslide Hazard Mitigation Program and managed by SDOT's Street Use division.