Fauntleroy Expressway Seismic Retrofit Project
The Fauntleroy Expressway spans over SW Admiral Way, Harbor Ave SW, SW Avalon Way, SW Manning St., and local railroad tracks that access the adjacent steel mill. First built in 1963, it was designed by the Seattle Engineering Department, the precursor to the Seattle Department of Transportation. The Expressway carries traffic between the West Seattle Freeway and Fauntleroy Way SW and is approximately 2527 feet long.
During the first phase of the seismic retrofit project, completed in 1994, column jackets were erected around select columns, and post tensioning was added to the supports. Longitudinal restrainers were also included to interconnect the roadway over each support.
Second phase construction activity began in September 2011 and is anticipated to be substantially completed by the end of the second quarter of 2012. This phase, estimated to cost $2.7 million, will upgrade the structure by strengthening the columns with steel jackets, strengthening the pile caps, replacing the bearing pads and adding longitudinal restrainers. Once completed, the seismic retrofitting improvements will decrease the probability that the Fauntleroy Expressway will collapse after a large magnitude earthquake.
For a cross-section of the bridge diagramming where the work is to be done, click here.
During the installation of the new bearing pads, traffic on the Expressway will be impacted on some nights and weekends. Closures of the Expressway will occur intermittently and detour routes around the work area will be in effect.
What to expect during closures:
This project is funded by Bridging the Gap, a nine-year levy for transportation maintenance and improvements. Seattle voters passed the $365 million levy in November 2006. The goal of the program is to create a strong foundation for Seattle’s transportation future by reducing the infrastructure backlog and investing in major transportation projects.
We are working closely throughout the project with local government, institutions, community groups and businesses, as well as transportation agencies and nearby neighbors, to gather information and help ease construction impacts.
Fauntleroy Expressway Project Team: