Eastbound SR 520 between I-5 and Montlake Blvd. closed overnight Aug. 8 Date: August 8, 2026 to August 9, 2026 Time: 7 p.m. Saturday to 11 a.m. Sunday Activity details: Full highway closure Impact type: OvernightTrafficNoise Description: Crews will use the closure to repair an expansion joint on the bridge. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: Eastbound SR 520 between I-5 and Montlake Boulevard will close for construction beginning at 7 p.m. on Saturday, Aug. 8, until 11 a.m. on Sunday, Aug. 9. All traffic from I-5 wanting to head eastbound on SR 520 must use alternate routes. Please note, eastbound SR 520 is open across Lake Washington. It is only the section of eastbound SR 520 between I-5 and Montlake Boulevard that will close. Closures Eastbound SR 520 between I-5 and Montlake Blvd. closed overnight Aug. 8 Westbound SR 520 between Montlake Blvd. and I-5 closed nightly Aug. 10-13 Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly Aug. 11 & 12 Montlake Blvd. closed between E. Hamlin St. and E. Louisa St. around-the-clock Aug. 21-24 Long-term closures Weekday parking restrictions near Fuhrman Ave. for staging site begin June 15 Boyer Avenue East reduced to a single lane between East Roanoke Street and Everett Avenue East July 20 – September 1 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly Aug. 11 & 12 Date: August 11, 2026 to August 13, 2026 Time: 10 p.m. to 6 a.m. nightly Activity details: Ramp closure Impact type: NighttimeOvernightTraffic Description: Crews will use this closure to re-stripe sections of the ramp. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: The eastbound SR 520 off-ramp to Montlake Boulevard will close for construction nightly beginning at 10 p.m. until 6 a.m. on Tuesday, August 11 and Wednesday, August 12. All traffic from I-5 entering eastbound SR 520 will pay the SR 520 Bridge Toll during the hours this ramp is closed. Those who do not want to pay the toll or who need to access Montlake from I-5 must use alternate routes. Closures Eastbound SR 520 between I-5 and Montlake Blvd. closed overnight Aug. 8 Westbound SR 520 between Montlake Blvd. and I-5 closed nightly Aug. 10-13 Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly Aug. 11 & 12 Montlake Blvd. closed between E. Hamlin St. and E. Louisa St. around-the-clock Aug. 21-24 Long-term closures Weekday parking restrictions near Fuhrman Ave. for staging site begin June 15 Boyer Avenue East reduced to a single lane between East Roanoke Street and Everett Avenue East July 20 – September 1 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Single lane on eastbound SR 520 between I-5 and Montlake Blvd. closed nightly July 22 – September 1 (excluding Sundays) Date: July 22, 2026 to At least September 1, 2026 Time: As early as 8 p.m. until 6 a.m. Mondays through Saturdays Activity details: Street and lane closure Impact type: NighttimeOvernightTraffic Description: Crews will use this closure for dump truck staging in coordination with the single lane closure on Boyer Avenue East for the Boyer Hillside regrade. Traffic: A single right lane on eastbound SR 520 between I-5 and Montlake Boulevard will close for construction nightly beginning as early as 8 p.m. until 6 a.m. Monday through Saturday nights from July 22 to at least September 1. The eastbound SR 520 off-ramp will remain open during these lane closures unless otherwise noted. These lane closures will not be in effect every night and sometimes will have different starting times (e.g. 8 p.m.., 10 p.m., 11 p.m., 11:30 p.m. or 11:59 p.m.). We will do our best to call out unique starting times for proper planning. The lane closure will always end at 6 a.m. Learn more about the Boyer Hillside regrade work on our Portage Bay Major Construction Updates webpage. Closures Eastbound SR 520 between I-5 and Montlake Blvd. closed overnight Aug. 8 Westbound SR 520 between Montlake Blvd. and I-5 closed nightly Aug. 10-13 Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly Aug. 11 & 12 Montlake Blvd. closed between E. Hamlin St. and E. Louisa St. around-the-clock Aug. 21-24 Long-term closures Weekday parking restrictions near Fuhrman Ave. for staging site begin June 15 Boyer Avenue East reduced to a single lane between East Roanoke Street and Everett Avenue East July 20 – September 1 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Westbound SR 520 between Montlake Blvd. and I-5 closed nightly Aug. 10-13 Date: August 10, 2026 to August 13, 2026 Time: 11 p.m. to 5 a.m. nightly Activity details: Full highway closure Impact type: NighttimeOvernightNoise Description: Crews will use this closure to re-stripe parts of the roadway near the exit ramps to I-5 and East Roanoke Street. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: Westbound SR 520 between Montlake Boulevard and I-5 in Seattle and all associated on- and off-ramps will close for construction nightly beginning at 11 p.m. until 5 a.m. August 10 – 13. All westbound SR 520 traffic coming from the eastside must exit at either Montlake or Lake Washington boulevards during the hours this section of SR 520 is closed. Eastbound SR 520 is not affected by this work and will remain open. Closures Eastbound SR 520 between I-5 and Montlake Blvd. closed overnight Aug. 8 Westbound SR 520 between Montlake Blvd. and I-5 closed nightly Aug. 10-13 Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly Aug. 11 & 12 Montlake Blvd. closed between E. Hamlin St. and E. Louisa St. around-the-clock Aug. 21-24 Long-term closures Weekday parking restrictions near Fuhrman Ave. for staging site begin June 15 Boyer Avenue East reduced to a single lane between East Roanoke Street and Everett Avenue East July 20 – September 1 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Boyer Avenue East reduced to a single lane between East Roanoke Street and Everett Avenue East July 20 – September 1 (excluding weekends) Date: July 20 to September 1 Time: 9:30 a.m. to 3:30 p.m. weekdays Activity details: Street and lane closureHigh-impact construction Impact type: DaytimeBike/pedestrianParking RestrictionsTrafficNoise Description: Crews will use this single lane closure to create space for dump trucks to remove nearly 20,000 cubic yards of soil from the Boyer Hillside. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: Boyer Avenue East will be reduced to a single lane between East Roanoke Street and Everett Avenue East beginning at 9:30 a.m. to 3:30 p.m. weekdays beginning Monday, July 20, until at least September 1. In addition, there will be parking restrictions on Boyer Avenue East to allow space for crews and traffic to get through. Flaggers will be on site to manage traffic flow. Travelers are advised to plan for delays or seek alternate routes if able. Learn more about the Boyer Hillside regrade on our dedicated project updates page. Closures Eastbound SR 520 between I-5 and Montlake Blvd. closed overnight Aug. 8 Westbound SR 520 between Montlake Blvd. and I-5 closed nightly Aug. 10-13 Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly Aug. 11 & 12 Montlake Blvd. closed between E. Hamlin St. and E. Louisa St. around-the-clock Aug. 21-24 Long-term closures Weekday parking restrictions near Fuhrman Ave. for staging site begin June 15 Boyer Avenue East reduced to a single lane between East Roanoke Street and Everett Avenue East July 20 – September 1 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Select SR 520 ramps closed for Revive I-5 construction in Seattle July 10-13 Date: July 10, 2026 to July 13, 2026 Time: As early as 10 p.m. Friday until 5 a.m. Monday Activity details: Ramp closure Impact type: Around-the-clock Description: Due to construction from a nearby project, select SR 520 ramps will be closed over the weekend to facilitate the work. These closures are not part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: Ahead of the upcoming “Revive I-5” weekend closure, travelers should prepare for delays and consider alternate routes due to ramp closures that begin Friday night, July 10, until Monday morning, July 13. For more details on the Revive I-5 project, please visit their website. Ramp closures include: Westbound SR 520 off-ramp to northbound I-5 Westbound SR 520 off-ramp to East Roanoke Street (closing as early as 10 p.m. on July 10) Northbound I-5 on-ramp to eastbound SR 520 (due to mainline I-5 closure) All ramps will reopen by 5 a.m. Monday, July 13. Closures Eastbound SR 520 between I-5 and Montlake Blvd. closed overnight Aug. 8 Westbound SR 520 between Montlake Blvd. and I-5 closed nightly Aug. 10-13 Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly Aug. 11 & 12 Montlake Blvd. closed between E. Hamlin St. and E. Louisa St. around-the-clock Aug. 21-24 Long-term closures Weekday parking restrictions near Fuhrman Ave. for staging site begin June 15 Boyer Avenue East reduced to a single lane between East Roanoke Street and Everett Avenue East July 20 – September 1 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Westbound SR 520 off-ramp to northbound I-5 and East Roanoke Street closed overnight July 9 Date: July 9, 2026 to July 10, 2026 Time: 10 p.m. Thursday to 6 a.m. Friday Activity details: Ramp closure Impact type: OvernightTrafficNoise Description: Crews will use this closure to remove graffiti and complete other work around the ramps. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: The westbound SR 520 off-ramp to both northbound I-5 and East Roanoke Street will close for construction maintenance beginning at 10 p.m. on Thursday, July 9, until 6 a.m. Friday, July 10. During this time, all westbound SR 520 travelers coming from the eastside wanting to go north must exit at either Montlake Boulevard or Lake Washington Boulevard. Drivers who stay on westbound SR 520 beyond those exits will be detoured to southbound I-5. Closures Eastbound SR 520 between I-5 and Montlake Blvd. closed overnight Aug. 8 Westbound SR 520 between Montlake Blvd. and I-5 closed nightly Aug. 10-13 Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly Aug. 11 & 12 Montlake Blvd. closed between E. Hamlin St. and E. Louisa St. around-the-clock Aug. 21-24 Long-term closures Weekday parking restrictions near Fuhrman Ave. for staging site begin June 15 Boyer Avenue East reduced to a single lane between East Roanoke Street and Everett Avenue East July 20 – September 1 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Westbound SR 520 off-ramp to E. Roanoke St. closed nightly June 29 – July 1 Date: June 29, 2026 to July 1, 2026 Time: 10 p.m. to 6 a.m. nightly Activity details: Ramp closure Impact type: NighttimeOvernightTrafficNoise Description: Crews will use these nightly closures to remove barrier near the off-ramp. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Traffic: The westbound SR 520 off-ramp to East Roanoke Street will close for construction nightly between 10 p.m. and 6 a.m. from June 29 through July 1. The westbound SR 520 off-ramp to northbound I-5, which shares the same exit as the ramp to East Roanoke Street, will remain open and is not affected by this work. Closures Eastbound SR 520 between I-5 and Montlake Blvd. closed overnight Aug. 8 Westbound SR 520 between Montlake Blvd. and I-5 closed nightly Aug. 10-13 Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly Aug. 11 & 12 Montlake Blvd. closed between E. Hamlin St. and E. Louisa St. around-the-clock Aug. 21-24 Long-term closures Weekday parking restrictions near Fuhrman Ave. for staging site begin June 15 Boyer Avenue East reduced to a single lane between East Roanoke Street and Everett Avenue East July 20 – September 1 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Eastbound SR 520 closed between I-5 and Montlake Blvd. in Seattle May 29 – June 1 (weather-dependent) Date: May 29, 2026 to June 1, 2026 Time: 11 p.m. Friday to 5 a.m. Monday Activity details: Partial highway closureRamp closureHigh-impact construction Impact type: Around-the-clock Description: Crews will use the closure to prepare for an upcoming traffic switch of the eastbound off-ramp to Montlake Blvd. This work is part of the SR 520 Portage Bay Bridge and Roanoke Lid Project. Learn more about this traffic shift on our latest blog post. Traffic: Eastbound SR 520 and all associated on- and off-ramps between I-5 and Montlake Blvd. in Seattle will close for construction beginning at 11 p.m. on Friday, May 29, until 5 a.m. Monday, June 1. During this closure, crews will adjust the exit point to Montlake Blvd. and connect the bridge to a new, temporary off-ramp. Crews will also connect the temporary off-ramp to Montlake Blvd. and then prepare to remove the existing off-ramp to make space for future construction. Westbound SR 520 remains open across Lake Washington to I-5. Eastbound SR 520 remains open across Lake Washington. It is only the section of eastbound SR 520 between I-5 and Montlake Blvd. that will close. Please note: The Montlake Blvd. on-ramp to eastbound SR 520 will also close during this weekend. Only HOV 3+ and transit are allowed to use the direct access ramp on Montlake to enter eastbound SR 520. All other travelers must use alternate routes. 🚧 Reminder: Eastbound SR 520 from I-5 to Montlake closes this weekend for another major traffic shift (weather dependent). 🌧️ ▶️Tune in now to watch Tony Black break down the closure, the new off-ramp to Montlake setup and everything you need to know before the big shift. pic.twitter.com/jdQYmbUtYW— SR 520 (@wsdot_520) May 27, 2026 Closures Eastbound SR 520 between I-5 and Montlake Blvd. closed overnight Aug. 8 Westbound SR 520 between Montlake Blvd. and I-5 closed nightly Aug. 10-13 Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly Aug. 11 & 12 Montlake Blvd. closed between E. Hamlin St. and E. Louisa St. around-the-clock Aug. 21-24 Long-term closures Weekday parking restrictions near Fuhrman Ave. for staging site begin June 15 Boyer Avenue East reduced to a single lane between East Roanoke Street and Everett Avenue East July 20 – September 1 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
Vibratory casing installation in Portage Bay schedule: Phase of work is complete Date: May 2026 to mid-summer 2026 (at least) Time: Between 7 a.m. and 10 p.m. on weekdays and 9 a.m. to 10 p.m. on weekends Activity details: High-impact construction Impact type: DaytimeNoiseVibration July 27, 2026 Update:Crews have finished installing the steel casings into Portage Bay for piers 4 through 8 of the new westbound bridge (casing installation for piers 1-3 and 9-12 will be scheduled in the future). Crews are now shifting their efforts to installing rebar and pouring concrete. This page will not be updated again until more vibratory work for casing installation resumes. Please call our 24-hour construction hotline at 206-319-4520 if you have questions on this or any other project-related work. Crews are now using vibratory hammers to install large diameter steel casings in Portage Bay. This work is helping build the new foundations for the future westbound Portage Bay Bridge. Crews started this work on the northwest side of the temporary work trestle near Boyer Avenue East and will work back and forth between casings, moving east toward Montlake Boulevard. Below is an update on the planned schedule of vibratory casing installation in Portage Bay. This schedule will be updated weekly and is meant to provide a general overview of planned work. Please note construction schedules can – and often do – change so please check this link regularly for potential updates. Installation schedule for the week of Vibratory casing installation for these piers is complete. Last updated: July 27, 2026 @ 9:10 a.m. Nearby neighbors will experience noise and vibration during daytime construction through mid-summer. After crews finish installing the casings, they will begin work on the drilled shafts. Typical work hours: 7 a.m. to 10 p.m. weekdays and 9 a.m. to 10 p.m. on weekends Questions or concerns about vibration? The outreach team is available 24 hours a day for neighbors to get in touch at 206-319-4520. We’re happy to answer calls and encourage neighbors to reach out if they have any questions or concerns about vibration, particularly if it’s unexpected, severe, or occurring in a place where it’s not usually felt. While neighbors are always welcome to call us, we want to reiterate that this kind of noise and vibration will be a regular part of construction activity in the project area over the next four to five years. Closures Eastbound SR 520 between I-5 and Montlake Blvd. closed overnight Aug. 8 Westbound SR 520 between Montlake Blvd. and I-5 closed nightly Aug. 10-13 Eastbound SR 520 off-ramp to Montlake Blvd. closed nightly Aug. 11 & 12 Montlake Blvd. closed between E. Hamlin St. and E. Louisa St. around-the-clock Aug. 21-24 Long-term closures Weekday parking restrictions near Fuhrman Ave. for staging site begin June 15 Boyer Avenue East reduced to a single lane between East Roanoke Street and Everett Avenue East July 20 – September 1 (excluding weekends) Activities Vibratory casing installation in Portage Bay schedule: Phase of work is complete Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
