Vibratory casing installation in Portage Bay schedule: Week of May 25-29 Date: May 2026 to mid-summer 2026 at least Time: Between 7 a.m. and 10 p.m. on weekdays (excluding holidays) and 9 a.m. to 10 p.m. on limited weekends Activity details: High-impact construction Impact type: DaytimeNoiseVibration 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 May 25-29 Wednesday, May 27, between 7 a.m. up to 10 p.m. Friday, May 29, between 7 a.m. up to 10 p.m. Last updated: May 22, 2026 @ 9:49 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 (excluding holidays) and 9 a.m. to 10 p.m. on limited 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 off-ramp to Montlake Blvd. closed nightly May 18-21 and 27-28 Eastbound SR 520 closed between I-5 and Montlake Blvd. in Seattle May 29 – June 1 Long-term closures Vibratory casing installation in Portage Bay schedule: Week of May 25-29 Boyer Ave. E. between E. Roanoke St. and Everett Ave. E. reduced to a single lane daily Feb. 18 – June 12 Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
