SR 520 Noisy Work Planned: 8/23 - 8/26

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#1 August 23, 2019 - 9:31am

SR 520 Noisy Work Planned: 8/23 - 8/26



I’d like to apologize for any sleep you may have lost from noisy, late-night SR 520 construction work on July 25. I am reaching out to let you know we have more nighttime construction planned for this weekend (Friday through Monday, Aug. 23-26) in Montlake. We are taking steps to reduce the noise level of this upcoming work, but the equipment will unavoidably create noise, and if for any reason you need to contact us, please call our 24-hour hotline at 206-775-8885.


WSDOT crews conducting nighttime work under a Temporary Noise Variance


WSDOT is committed to cleaning up the contamination on the site of the Montlake Market and 76 gas station following the department’s June purchase of the property. WSDOT contractor crews will use drilling equipment this weekend to collect more soil and groundwater sample for analysis.


What to expect


  • The work will take place from 9 p.m. Friday, Saturday and Sunday, Aug. 23-25, until 6 the following mornings.
  • Crews will use a vacuum truck to bore through the first five feet of soil, and then use a drill rig to complete the remaining, deeper boring.
  • To minimize neighborhood disruptions, crews plan to complete the loudest work first, between 9 p.m. and midnight.


Because the necessary equipment is louder than what is typically allowed for nighttime work, the work is being performed under a city of Seattle temporary noise variance. This kind of activity-specific variance allows the work to exceed noise limits established both by the city of Seattle’s standard noise ordinance and by the Major Public Project Noise Variance (MPPCNV) that took effect Aug. 16 for the SR 520 Montlake Project. A noise inspector will be on-site to monitor and ensure that all available strategies are used to minimize effects to surrounding areas.


This work will occur at night to limit the effects to the two adjacent businesses and to the traveling public. Also, three of the borings are located beneath King County Metro bus trolley wires. De-energizing these power lines must occur at night.


Graham crews conducting weekend work under an MPPCNV


Additionally, crews working for Graham, the Montlake Project contractor, will be working day and night this weekend to construct a portion of a new, temporary Montlake Boulevard off-ramp. Drivers will use this ramp during much of the Montlake Project’s four-year construction.


What to expect


  • This work will begin as early as 11 p.m. Friday, Aug. 23, and wrap up no later than 5 a.m. Monday, Aug. 26.
  • During this time, the westbound SR 520 Lake Washington Boulevard off-ramp will be closed, and bicycle/pedestrian access across 24th Avenue East also will close.
  • Nearby neighbors may hear noise both day and night from grading and excavating machinery, as well as from saw cutting along the 24th Avenue East overpass.


By working around the clock over the weekend to complete this work, crews will avoid up to two weeks’ worth of overnight work and ramp closures. This results in fewer noisy nights for neighbors, fewer traffic closures, and increased safety for our crews and corridor travelers.


Graham’s nighttime work this weekend will take place under a project-long Major Public Project Construction Noise Variance. I’ve attached a flyer we mailed earlier this month to project neighbors with more information about this particular, longer-term noise variance.


Construction notification resources


Again, if you have any concerns about noise during this weekend’s work, please call the Montlake Project 24-hour hotline at 206-775-8885. You’ll reach a staff member who has a direct line of communication to our crews on the ground.


In addition, if you have not already done so, please sign up for our regular SR 520 email updates or view the map on our Construction Corner webpages. Moving forward, you can use this online resource to see upcoming daytime and nighttime construction activities. I recommend that you bookmark the site.


We don’t expect this weekend’s work to be as noisy as the late-night work conducted on July 25. Nevertheless, I wanted to make sure you have the latest information about the upcoming work and let you know how to reach us if there are any problems during the night.




Bob Derry

Montlake Project – Public Information Manager

SR 520 Bridge Replacement and HOV Program

Graham Contracting, LTD (Consultant)