S Lander St Bridge

What's happening now?

The Lander St Bridge project has brought a contractor on board, Flatiron Construction, and is gearing up to begin construction activities. In the coming weeks, you'll notice construction activity ramp up ahead of the full Lander St closure, now scheduled for late May/early June of this year. Lander St will be closed to traffic from 1st Ave S and 4th Ave S through early 2020 while we build the new bridge. Pedestrian and bicycle rider access will be maintained.

Prior to the closure, we will do some early work to help keep traffic moving in the area once bridge construction gets underway. Early work will include things like changes to adjacent driveways, some utilities work, signal timing and roadway striping. To stay up-to-date with the latest construction information, see our latest project email update and sign up to join the project email list using the form to the right or at the bottom of the page.

We'll be out in the community ahead of the S Lander St closure, distributing project and construction information.

Puget Sound Energy (PSE) continues to relocate gas lines on S Lander St. You may see PSE crews, equipment, and vehicles in the corridor. This is preliminary work to prepare the site for S Lander St Bridge construction, which is set to begin soon. Please see this flier from PSE for work details and contact information.

We'll be posting more information as construction approaches. Sign-up for email updates using the email sign-up form on this page.

Metro Routing Revisions

Starting March 10, 2018, Metro routes 21, 37, 50, 116, 118, and 119 will be rerouted for the duration of the Lander St Bridge Project. Generally, routes will be revised to operate both north and south on 1st Ave S between S Lander St and Edgar Martinez Dr S, and on Edgar Martinez Dr S between 1st Ave S and 4th Ave S. Temporary reroutes will be in place before, during, or after major stadium events. Please visit the King County Metro website for more information and sign up for Transit Alerts.

Public outreach

Project overview

Project map
Click to enlarge

South Lander St is an essential east-west connection in Seattle’s SODO neighborhood. Every day, the street serves over 13,000 vehicles, 1,400 pedestrians, 100 bicyclists, and needs to be closed over 100 times per day for train crossings. This active train crossing causes frequent traffic delays and poses a potential safety risk, especially for people walking and biking. As the region continues its rapid growth and rail operations in the area expand in the coming years, the S Lander St "bottleneck" could put the Pacific Northwest's economic vitality at risk.

Watch this time-lapse video of the S Lander St crossing to see typical weekday traffic volumes and interactions between the corridor's many users.

To improve local traffic circulation, rail operations, and safety, SDOT will build a bridge over the railroad tracks on S Lander St between 1st Ave S and 4th Ave S. This crossing will provide a roadway unimpeded by rail operations, improve safety, and relieve congestion in Seattle's SODO neighborhood.

Project Cost and Funding

The total project cost estimate is $123 million, with contributions from the City of Seattle and project partners, including the U.S. Department of Transportation, the State of Washington, Port of Seattle, and BNSF Railway.

Funding graph



  • Project reactivated
  • Preliminary (30%) design complete
  • Public outreach began, feedback incorporated into design
  • Federal grant approved
  • Two open houses



  • Preliminary construction outreach began
  • 60% design
  • Open house


  • Continued preliminary construction outreach
  • Design complete


  • Pre-construction outreach begins
  • Project goes to bid


Early 2018

  • Pre-construction outreach continues
  • Construction begins

Early 2020

  • Construction complete

Get Involved

We're committed to keeping you informed and working with neighbors to limit construction impacts to the extent feasible. Here are some ways to get more information about the project:

  • Review project materials linked below
  • Email the project team at lander_bridge@seattle.gov or leave a voicemail at 206-684-5321. A project representative will return your call.
  • Request a briefing for your business or organization (contact us via phone or email)

Frequently Asked Questions

How long is construction expected to last?

Construction is expected to last 2 years.

Will S Lander St be closed during construction?

S Lander St will be closed during bridge construction. S Lander St will remain open while preparation is made for construction (signal changes, striping), but will close to all motor vehicle traffic once bridge construction begins (planned Spring 2018). The closure is expected to last through early 2020.

Bicycle and pedestrian access will be maintained on S Lander St for the duration of the project. Improvements to adjacent streets and signal changes will help to keep traffic moving during construction.

Why is this project important?

The S Lander St Bridge will enhance mobility in this critical freight corridor and improve safety for people walking, biking, and driving.

Will customer and local access be maintained during construction?

Customer and local access will be maintained. Access to businesses on S Lander St will be maintained using alleys and connections from 1st Avenue S and 4th Avenue S. Local access maps will be available on the project website.

How do I get in touch with the team with questions or concerns?

The project team will keep the public informed throughout the project via regular email and web updates. The project will also have an information line and project inbox and staff on hand to respond to questions and concerns as they arise.

To sign up for regular email updates, enter you contact information in the email sign-up form on this page.

Contact us at:

Voicemail line: 206-256-5450
Email: lander_bridge@seattle.gov

How will the project create more reliable freight movement?

The bridge will create reliable access adjacent to one of the largest port operations in the United States. It will improve safety for the more than 3,000 freight rail cars per day on the tracks, and reduce truck delays, congestion and emissions for more than 13,000 vehicles each day including 1,400 surface freight trucks per day. This project will improve the reliability of the last-mile connections between the interstates and the Port of Seattle and area manufacturing in the Duwamish Manufacturing Industrial Council (MIC), the largest MIC in the state.

How will the bridge benefit people walking and biking?

The new bridge will feature a 14-foot walking/biking path on the north side of the bridge that is physically separated from the road. The bridge approaches will also include new curb ramps that meet current standards for accessibility.

Will this project address safety and access in the SODO neighborhood?

The project will increase safety by separating trains from people walking, biking, and driving and creates an unimpeded access point for emergency responders. The bridge also provides access between regional transit hubs and employment centers.

Information For Contractors

SDOT has closed bidding for the design-bid-build S Lander St Bridge Project in summer 2017.


Categorical Exclusion Worksheet
Introduction and Project Description
Cultural Resources Assessment
Hazardous Materials Discipline Report
Noise Discipline Report
Visual Impact Assessment
Social Effects and Environmental Justice Discipline Report
Transportation Discipline Report

State Environmental Policy Act (SEPA) Review

The Seattle Department of Transportation (SDOT) determined that the S Lander St Grade Separation and Railway Safety Project will not have a probable significant adverse impact on the environment. As a result, SDOT issued a Determination of Non-significance on May 11, 2017. The DNS, Categorical Exclusion Worksheet, and supporting documents may be examined through the links below.