Rainier Avenue S Landslide Mitigation Project
September 7, 2016
The City of Seattle Landslide Mitigation Program recently received funding to deal with a long standing issue of surface slides from the adjacent slope as well as significant overgrowth covering and obstructing the use of the adjacent sidewalk along segments of Rainier Ave S between S. Carver St to the south city limits near S Ryan St. The intent of the project is to recover as much of the existing sidewalk so that the sidewalk can be used by pedestrians. Work will include characterizing the adjacent slope and identifying methods of recovering the existing sidewalk. Methods of recovery could include: re-grading the immediate area behind the existing sidewalk and placement of gravity catchment walls and/or soldier pile catchment walls.
The project will meet SDOT's goal of road and sidewalk maintenance, increasing the life of the streets and reducing impacts to pedestrians and traffic.
SDOT maintains almost 600 retaining walls, most protecting public streets. The average height is six feet, and if all the retaining walls and seawalls were lined up end to end, they would extend for 21 miles.
Design: Winter 2016 – Summer 2016
Anticipated Construction Impacts
Information on construction impacts will be available closer to the start of construction in fall 2016. General construction impacts will include: noise, dust, vibration, lane restrictions, and potential detours (vehicular, bike, pedestrian).
The project is being funded through the City's Landslide Hazard Mitigation Program and is being managed by SDOT's Street Use division.
Questions or Comments?