As soon as Thursday, January 29, crews will work overnight to remove the underground temporary sewer diversion pipe on M Street Northeast near 2nd Street Northeast. The diversion pipe was installed to maintain sewer services while crews repaired the M Street Trunk sewer pipe.
Work will occur at night, between 8 pm and 5 am, to reduce impacts on traffic during the day. After crews remove the diversion pipe, crews will place steel plates over the work areas until we restore the roadway.
During this work, flaggers will direct one lane of alternating traffic to maintain access to M Street Northeast.
See the interactive construction map, which you can find by visiting: kingcounty.gov/MStreetTrunkRehab.
- Night work will occur within permitted hours between 8 pm on Thursday, January 29 and 5 am on Friday, January 30.
- Expect noise from trucks, excavators, and other construction equipment.
- Lights will be used to safely illuminate the work area.
- Construction vehicles and materials may be staged nearby. Flaggers will direct vehicles and pedestrians around the work zone.
- Street parking will be restricted in posted areas.
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You will be able to use your sinks, toilets, and showers normally. Wastewater service will be maintained during construction
Please watch for equipment and signs in the area, travel slowly, and follow directions from flaggers in the work zone.
The King County Wastewater Treatment Division is repairing approximately 2.6 miles of old concrete sewer pipe, ranging in size from 18 to 36 inches wide, in Auburn. We will also fix 45 maintenance holes and over 100 side sewer connections to homes and businesses. Rehabilitating the M Street Trunk will help preserve aging infrastructure and ensure the reliability of our regional wastewater system.
In September through the winter of 2025, crews repaired the sewer pipes on Zones 18, 24, and some parts of Zone 30 on M Street Northeast, starting from the intersection on 14th Street Northeast to near 22nd Street Northeast. In summer 2026, crews will finish construction on the remaining part of Zone 30 and all of Zone 36.
Construction is disruptive. King County’s goal is to complete construction efficiently to minimize disruptions to the community.
We are committed to keeping you informed throughout this project. We will provide advance notice of construction activities through mail, email, text messages, web bulletins, and project flyers. If you are hosting a community event, we can set up a table, provide materials, and answer questions. Please contact the project team if you are interested in having us attend!
To stay informed about the project and the active construction site, please visit our project webpage at kingcounty.gov/MStreetTrunkRehab. If you have questions or concerns, feel free to email: MStTrunkrepair@kingcounty.gov or call 206-263-9878. Please note this is the M Street Trunk Rehabilitation Project hotline. If there is an emergency, please dial 911. This phone line is for incoming calls only. We will never call you by this number. If you receive a call claiming to be from this number, please be aware it may be a scam.
We offer interpretation services at no cost.
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