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In this update:
Starting as early as Monday, July 20, crews will work around the clock for approximately four months to remove and replace nearly 30,000 cubic yards of soil on the Boyer Hillside between the East Roanoke Street alley and SR 520 near the Boyer Stairs. This will reduce the overall amount of infrastructure that needs to be built in the area and strengthen the long-term stability of the hillside.
What to expect:
- This work will be completed in several phases.
- Crews will work around the clock for at least four months to complete the first two phases of work, beginning as early as July 20.
- Additional work is scheduled for 2028 after the new westbound Portage Bay Bridge is complete.
- Nearby neighbors will see and hear an increase in truck traffic on Boyer Avenue East.
- Single-lane closures on Boyer Avenue East and eastbound SR 520 will be in place for much of the work.
Visit our Construction Corner page for more information
We recognize this approach differs from what we originally planned and will have different impacts on the neighborhood. To learn more about this work and help neighbors stay informed, we've launched a new Construction Corner webpage with detailed information about planned construction activities. We encourage neighbors to bookmark the page and check back periodically.
If you have any questions about the project or construction, please call our 24/7 hotline at 206-319-4520 or send an email to SR520bridge@wsdot.wa.gov.
We're sharing more details about this summer's sign structure changes on Montlake Boulevard. As a reminder, this work is based on community feedback and recommendations developed in 2023/2024 to remove and replace the large sign bridge on Montlake Boulevard with smaller signs and structures.
Installation requires two full weekend closures of Montlake Boulevard in July and August. Below are details about what to expect for the July 17-20 weekend closure. We'll share more details about the August closure as it gets closer.
July 17-20 closure details:
Date/time: 10 p.m. Friday, July 17, to 6 a.m. Monday, July 20
What's closed:
- Montlake Boulevard between East Hamlin Street and East Louisa Street
- Montlake Boulevard on-ramps to eastbound and westbound SR 520
- A 300-foot section of East Roanoke Street west of Montlake Boulevard
- Lake Washington Boulevard between Montlake Boulevard and 24th Avenue East
The westbound SR 520 off-ramp to northbound Montlake Boulevard will remain open. Crews will maintain a path for people walking, biking and rolling to cross SR 520 on Montlake Boulevard, with a limited detour south of SR 520. See map below.
During the July 17-20 closure, crews will:
- Dig, form and pour concrete foundations for three new mast-arm structures on Montlake Boulevard.
- Remove the foundations of the third, uninstalled sign bridge that was planned to be installed on Montlake Boulevard south of East Hamlin Street.
- Replace roadway panels on Montlake Boulevard and East Roanoke Street.
This work requires a temporary noise variance (TNV) from the city of Seattle. Nearby neighbors will be offered a hotel. Nearby neighbors can expect to hear construction noise and potentially feel vibration from concrete sawing, excavation, digging, hauling, vacuum truck operations and concrete pours.
Visit our new webpage for full closure details, information about the work, and background on the community engagement process, including recommendations and frequently asked questions.
Crews continue installing drilled shafts near East Roanoke Street. These drilled shafts will support the future Roanoke lid.
As of this week, we’ve installed five out of 18 drilled shafts in this area.
Construction overview:
- Crews will continue to use an oscillator to rotate a temporary steel casing into the ground while removing soil.
- Once crews complete excavation, cranes will lift and place the rebar cage into the shaft.
- Crews will then pump concrete into the drilled shaft. After the concrete is in place, they will remove the temporary casing using the oscillator.
Nearby neighbors will experience noise and vibration during construction. This phase of lid construction is expected to continue through the summer.
Crews prepare to install a drilled shaft casing that will support the foundation of the future Roanoke lid.
What neighbors should expect:
- Typical work hours are 7 a.m. to 10 p.m. weekdays (excluding most holidays), and 9 a.m. to 10 p.m. on weekends.
- Increased noise and vibration during this work from trucks and equipment.
- Flaggers on Delmar Drive East to help guide construction vehicles in and out of the work zone.
- Daytime parking restrictions (6 a.m. to 6 p.m.) on the west side of 11th Avenue East between Delmar Drive East and East Miller Street, and on the east side of Boyer Avenue East between East Roanoke Street and just south of SR 520.
Crews continue installing on-land piles in the area between Boyer Avenue East and the work trestle on the south side of SR 520.
Later this month, crews will also install 10 additional piles in this area to complete the work trestle connection to Boyer Avenue East. We will share more details about the schedule once it’s confirmed.
Pile installation between Boyer Avenue East and the work trestle on the south side of SR 520.
What to expect:
- Impact piledriving (on land) and vibratory piledriving.
- Typical work hours: 7 a.m. to 5 p.m.
- Increased noise and vibration for neighbors near the work zone.
If you have questions about this work or the project, please call our 24-hour hotline at 206-319-4520 or email us at SR520bridge@wsdot.wa.gov.
#1: Pop-up event near Montlake Community Center on Friday, July 17
Come stop by our outreach table at the Montlake Community Center to learn about new major construction activities happening near Boyer Avenue East. Our project staff will be available to share updates, answer questions and discuss current and upcoming construction.
Can’t make it? We’ll have more opportunities to meet in person later this summer and fall!
#2: Online construction meeting on Thursday, July 23
Join us for our next monthly construction meeting held virtually at noon on Thursday, July 23. At the meeting, you'll hear an overview of construction progress and learn about upcoming construction activities, including local street closures. Register below to attend and email sr520bridge@wsdot.wa.gov with any questions.
Missed the last Portage Bay Project monthly meeting? You can view the presentation online (PDF, 7 MB) or watch the meeting recording on YouTube.
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Updated weekly: Vibratory casing installation schedule in Portage Bay
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July 9-10: Westbound SR 520 off-ramp to northbound I-5 and East Roanoke Street closed overnight
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July 10-13: Select SR 520 ramps closed for Revive I-5 construction (closures are unrelated to the SR 520 Program)
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July 17-20: Montlake Boulevard closed between East Hamlin Street and East Louisa Street around-the-clock
Check our Construction Corner map for the most up-to-date information on SR 520 closures and construction impacts.
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Call or text our project-specific construction hotlines with pressing questions or concerns related to the:
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Portage Bay Project: 206-319-4520 (24-hour hotline)
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Montlake Project: 206-200-9484, M-F 8 a.m. - 5 p.m.
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Call the SR 520 Program information line (206-200-9484, M-F 8 a.m. - 5 p.m.) with general SR 520 inquiries.
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Email SR 520 staff with your questions about the project or construction activities.
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Visit the SR 520 Construction Corner for the most up-to-date information on closures and construction impacts.
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Visit the SR 520 Program website to find general information about the project.
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Email Regina Glenn, WSDOT Megaprograms Diversity and Inclusion Manager, for more information about contracting opportunities.
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Follow us on Twitter/X and BlueSky to get key news and updates about the SR 520 program.
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Share the ROTW listserv with your friends and neighbors.
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View construction photos taken 'round the clock by our four mounted construction cameras.
Note: We combined our two SR 520 Program email lists into one. This newsletter will focus on Portage Bay Project construction and closures while also sharing other SR 520 updates. You can manage your preferences or unsubscribe anytime.
If you have difficulty understanding English, you may request language assistance services free of charge by calling (360) 705-7090 or emailing TitleVI@WSDOT.WA.GOV.
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Thank you for signing up for the SR 520 Rest of the West news email updates. WSDOT will keep the community informed of current and planned construction activities through these updates and the tools listed above.
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