Perkins Lane W Retaining Wall Mitigation Project
Updated: November 8, 2024
What's Happening Now!
We have completed our work on the Perkins Lane retaining wall and drainage. We will now begin work to restore the road. While we can complete the foundational work for the road, the final asphalt paving is weather dependent, and we will need to wait for suitable conditions before we reach completion. We appreciate your ongoing patience and cooperation as we continue to enhance the infrastructure in your community.
A section of the 2800 block of Perkins Lane W remains closed to ensure safety and efficiency during this phase. We will continue to collaborate with neighbors to provide necessary vehicle access, while maintaining pedestrian access throughout the project, with occasional closures when required.
What to expect during construction:
- Typical weekday work hours of 7am – 5pm, Monday through Friday.
- Road closures and detours for people driving, walking, and biking.
- Some short-term driveway access disruptions
- Noise, dust, and vibrations during work hours
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 ( 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.
Materials
June 2024: Public Presentation
June 2024: Final Plans
May 2024: Construction Notice