Vibratory casing installation in Portage Bay schedule: Week of July 20-26 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 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 July 20-26 Tuesday, July 21, between 7 a.m. up to as late as 10 p.m. Wednesday, July 22, between 7 a.m. up to as late as 10 p.m. Friday, July 24, between 7 a.m. up to as late as 10 p.m. Saturday, July 25, between 9 a.m. up to as late as 10 p.m. Last updated: July 20, 2026 @ 2:41 p.m. Graphic shows the current installation progress as of July 20, 2026. 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 Montlake Blvd. between E. Louisa St. and E. Roanoke St. reduced to one lane in each direction July 22-24 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 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 Sundays) Single lane on eastbound SR 520 between I-5 and Montlake Blvd. closed nightly July 22 – September 1 (excluding Sundays) Activities Vibratory casing installation in Portage Bay schedule: Week of July 20-26 Contact Info Email: sr520bridge@wsdot.wa.gov 24-hour construction hotline: 206-319-4520
