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King County North Mercer Island Enatai Sewer Upgrade Project




December 2024






Update: Pipe repair work on 78th Avenue Southeast continues into early 2025





Crews are currently repairing pipe on 78th Ave S.E. between Southeast 22nd Place and Southeast 24th Street. Crews need to continue working in this area through early 2025. This is necessary as crews work around existing utilities and make sure that recently installed pipe is not damaged as part of this work.  

 

*Single lane traffic and traffic control signals on 78th Ave S.E.*

During this work, single-lane traffic and temporary traffic control signals remain in place on 78th Ave S.E. 24/7, both during and after work hours. This is to maintain public and crew safety during construction. Signals are located on both sides of the active work zone. Vehicles traveling on 78th Ave S.E. may experience wait times of up to 15 minutes at these signals. During working hours, crews are also on site to assist traffic.

 

In addition, driveway assistance devices installed at the end of driveways on 78th Ave S.E remain in place to maintain safe access around the work area for residents. Access to homes will be maintained, but it may take crews up to 15 minutes to set up a safe surface for you to cross.

 

We understand that waiting for traffic control signals is inconvenient. We appreciate your patience as we work to complete construction as safely as possible. If you have questions or concerns about access, please call our construction hotline at 425-305-3578.

 

Traffic_Signal_image

As construction continues on 78th Ave S.E., temporary traffic control signals are in place to safely direct traffic through the work area.

 

 

*Intersection closure planned*

As work on 78th Ave S.E. progresses, the intersection at 78th Ave S.E. and S.E. 24th St will need to be temporarily closed for construction. During the closure, traffic will detour on S.E. 22nd Pl and 80th Ave S.E. We will send a notice with more details and update the project website once this is scheduled.

 

*Why are pipe repairs needed?*

Testing the pipe ensures the newly installed conveyance system operates as planned. Pipe testing revealed an issue that needs a repair. Crews are repairing the pipe to make sure the system operates correctly and safely to ensure reliable sewer service for your community. This work involves a construction method called open-cut trenching. During open-cut construction, crews sawcut the roadway’s surface, remove asphalt, and dig down to the pipe.

* *

*Plans for final restoration*

When repairs are complete, crews will backfill the roadway and temporarily restore the roadway surface where the pipe was installed. Then, crews will restore all disturbed areas based on permit conditions agreed upon with the City of Mercer Island. Final paving is weather dependent and will take place during the next permitted paving window, which begins in the spring.

 

*Please travel slowly through the work area and follow all signage, traffic control signals, and directions from crews.*

 





What to expect during construction:

* Approved work hours are 7 a.m. to 7 p.m. Monday to Saturday.
* Flaggers, signage, and traffic signals will direct single-lane traffic through the work areas.
* Some homes may be subject to temporary daytime driveway access interruptions.
* Access to residences will be maintained during construction. Crews will lay metal plates over excavations to restore access as needed.
* If you have access concerns, please contact us at 425-305-3578.

* No parking in the public right-of-way during this work.
* Noise, dust, and vibrations typical of an active construction project.
* Expect intermittent loud noise during jackhammering and saw cutting.
* Expect increased continuous noise while the vacuum truck is in use.

* Emergency vehicle access will be maintained.
* Garbage, recycling, composting, mail, and delivery service will be maintained.
* If services are interrupted, please call Community Services at 425-305-3578.

* Construction schedules can change based on factors such as site conditions, weather, and material availability. Please check our project website [ http://www.kingcounty.gov/MercerEnataiSewer ] for updates.

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Learn more about this project

* Contact the community services team at 425-305-3578 or email NMEsewer@kingcounty.gov
* Visit the project website: kingcounty.gov/MercerEnataiSewer [ https://kingcounty.gov/depts/dnrp/wtd/capital-projects/active/north-mercer-island-enatai-sewer-upgrade.aspx ].
* Alternative Formats Available: 206-477-5371 or TTY Relay: 711  





*Sign up for location-specific email lists on our website.* [ https://kingcounty.gov/en/dept/dnrp/waste-services/wastewater-treatment/capital-projects/north-mercer-island-enatai-sewer-upgrade/update-sign-ups ]






Los servicios de interpretación y traducción están disponibles para usted sin costo alguno. Si los necesita, comuníquese con NMEsewer@kingcounty.gov, 425-305-3578

 

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About King County Wastewater Treatment Division

The King County Wastewater Treatment Division protects public health and the environment by collecting and cleaning wastewater while recovering valuable resources for a healthy and resilient Puget Sound. We provide services to 18 cities, 15 local sewer districts, the Muckleshoot Indian Tribe, and nearly 2 million people across a 424-square-mile area in King, Snohomish, and Pierce counties.

[ https://kingcounty.gov/en/legacy/depts/dnrp/wtd ]



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