Rainier Ave S Landslide Mitigation Project

Updated: December 12, 2019

Overview

We're working to address the long-standing surface slides as well as significant overgrowth obstructing the sidewalk along segments of Rainier Ave S from S Carver St to the south City limits near S Ryan St.

Because of limited funds, the project team prioritized the problem areas. In 2016, we installed a 60’ segment of retaining wall and cleared overgrowth from the existing sidewalk to open it up to people walking.

In late 2019/early 2020, we plan to install the retaining walls outlined within the map below. See our construction mailer for more info. 

Project map
Click to enlarge

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: Winter 2016 – Fall 2017
Construction: Installed priority retaining wall and cleared sidewalk in 2016; Remaining retaining wall installation in late 2019/early 2020

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

Construction mailer (December 2019)

Project map (2019)

Project map (work completed in 2016)