E Duwamish Waterway Bridge Rehabilitation Project
The East Duwamish Waterway Bridge crosses the East Duwamish Waterway on SW Spokane Street. From I-5 and downtown Seattle, it serves the West Seattle communities, Harbor Island, and Port of Seattle Terminals 5 and 18.
Since the East Duwamish Waterway Bridge’s construction in the mid-1970s, traffic has increased significantly, especially the number of heavily loaded trucks. Due to age and increased traffic volumes, the bridge has deteriorated, and needs to be rehabilitated to extend its service life and to reduce frequency of major maintenance and repair.
Keeps freight moving
Protects an important asset
Reduces the City’s maintenance backlog
Our goal is to minimize the impact to traffic and to keep freight moving to and from the Port of Seattle. The bridge will remain open to traffic throughout the construction period, with two westbound lanes and one eastbound lane remaining open. Occasional nighttime and/or weekend closure of the bridge, if any, will be kept to a minimum.
Construction activities are expected to occur from the bridge deck. Crews will employ best management practices to control dust from drilling and asphalt removal and to capture any concrete or chemicals from spilling into the Duwamish River. This project will be reviewed under the State Environmental Policy Act (SEPA).
This project is funded by Bridging the Gap, a voter-approved $365 million dollar levy for transportation maintenance and improvements.
Over the next nine years, Bridging the Gap will address the City’s mounting transportation problems and create a strong foundation for Seattle’s transportation future by reducing the infrastructure backlog and investing in major transportation projects.
Want to Learn More?
The design team will balance the impacts of construction while achieving the project’s goal of providing a safe and functional bridge. SDOT will work closely with the community to share project information, answer questions, and address concerns.
For the latest news and information, or to request a project briefing, contact: