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Upcoming Bridge Closure



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Stay Informed: 15th Ave NE & NE 105th St Bridge Seismic Retrofit

*We’re making the **15th Ave NE/NE 105th St Bridge* [ https://www.seattle.gov/transportation/projects-and-programs/programs/bridges-stairs-and-other-structures/bridges/15th-ave-ne-bridge-seismic-retrofit/?utm_medium=email&utm_source=govdelivery ]* stronger and less vulnerable in the event of an earthquake. We expect the project to be finished in summer 2026. *





*Upcoming Bridge Closure: Thursday, September 11 from 9 a.m. to 3 p.m. *
A “Road Closed” and “Do Not Enter” sign blocks a street with traffic cones, while a white utility truck with flashing lights is parked behind it.
What's Happening Now?

*Upcoming Bridge Closure*

Crews will *close the 15th Ave NE/NE 105th St bridge from 9 a.m. to 3 p.m. on Thursday, September 11 *to pour concrete crossbeams as they continue work on the bridge to make it better withstand earthquakes. These crossbeams are horizontal supports that connect to the vertical parts of the bridge, adding stability and strength.

*How Will This Work Impact You?*


* Driveways on 15th Ave NE between NE 104th St and NE 105th St will remain accessible.
* People walking or using mobility devices can still cross the bridge during full closures.

 

Detour map showing upcoming closure of 15th Ave NE at NE 105th St and alternate routes for thru traffic.

Map of detour route for the upcoming closures of the 15th Ave NE/NE 105th St Bridge. Thru traffic will be detoured via NE 75th St, Roosevelt Way NE, NE Northgate Way, and Lake City Way NE.

*Progress Update*

* *Water main update*: The water main upgrades are now complete.
* *Crossbeam retrofits:* In the past few weeks, crews have worked on the mid crossbeam and upper crossbeam retrofits. They have completed about a third of the crossbeam retrofits and will continue working on them for the next month.

 

Two photos side by side. Left: workers smooth fresh concrete on a street. Right: a worker in a lift inspects a bridge column

On the left, construction crews smooth concrete on a new section of roadway, replaced after water main upgrades. On the right, crews place reinforcing bars in preparation for a concrete pour that will strengthen the bridge’s crossbeams during a seismic event

Important Reminders

*What to Expect During Construction*


* Access to homes will stay open. If we need to block a driveway, we’ll notify you ahead of time.
* Crews will work in public areas near homes and businesses.
* Expect typical construction impacts like noise, dust, vibrations, and equipment on site.
* Work hours are 7 AM to 5 PM.

*Sidewalk impacts*

* One sidewalk on 15th Ave NE at the bridge will stay open at all times.

*Lane closures on 15th Ave NE at the bridge*

* Ongoing one-lane closures.
* Usually, one lane will stay open, with flaggers or temporary signals guiding traffic.
* On-street parking won’t be available throughout the project.

* Crews will fully close the bridge at least once a week. 
* These closures won’t block driveways on 15th Ave NE between NE 104th St and NE 105th St.
* People walking or using mobility devices can still use the bridge during full closures.



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Keeping You Updated

Please share this update with your neighbors and encourage them to sign up for email updates [ https://public.govdelivery.com/accounts/WASEATTLE/subscriber/new?qsp=WASEATTLE_8 ] to stay informed.

Thank you,

Bridge Seismic Retrofit Program Outreach Team
Visit our website: 15th Ave NE/NE 105th St Bridge Seismic Project [ https://www.seattle.gov/transportation/projects-and-programs/programs/bridges-stairs-and-other-structures/bridges/15th-ave-ne-bridge-seismic-retrofit/?utm_medium=email&utm_source=govdelivery ]
Contact us at BridgeSeismicRetrofit@seattle.gov | (206) 775-8734

 
















*Seattle Department of Transportation*

700 5th Avenue

Suite 3800

Seattle, WA 98104

*Phone: 206-684-7623*

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