Portage Bay piledriving schedule: Week of Oct. 5-11

Date: Sept. 1, 2026 to through April 30, 2027 (for in-water impact piledriving only)

Time: Hours vary, see schedule details below

Activity details:

Impact type:

Crews are using vibratory and impact piledriving equipment to install piles on land and in water in several locations in Portage Bay. We update this page weekly with information about planned piledriving to help neighbors know what to expect.

Piledriving schedule: Week of Oct. 5-11

Last updated: Oct. 7, 2026 @ 5:08 p.m.

For the schedule below, west end refers to locations near Boyer Avenue East, while east end refers to locations near the Montlake interchange. Work at either end may occur on the north or south side of the existing SR 520 bridge. Piledriving may occur at both ends at the same time, using different equipment.

Please note that construction schedules can – and often do – change as work progresses. Bookmark this page and check back regularly for the latest updates.

Nearby neighbors will experience noise and vibration during piledriving. 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 until the project is complete.

Questions or concerns about noise and 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 noise and vibration, particularly if it’s unexpected, severe, or occurring in a place where it’s not usually felt.