As soon as Monday, October 27, crews will begin nighttime work to repair the M Street Trunk sewer pipe and maintenance holes on M Street between 4th Street Northeast and 2nd Street Northeast. The crew will set up a staging area on existing sewer maintenance holes. This work is expected to continue through November 7.
Work will occur at night between 8 p.m. and 5 a.m. to reduce traffic impacts during the day on M Street.
Nearby neighbors should expect nighttime noise from trucks and construction equipment. Crews will also use lights to see clearly while they are working. Lightning will be directed to work area to minimize light pollution.
- Night work will occur within permitted hours between 8 p.m. and 5 a.m.
- Expect noise from trucks and other construction equipment.
- Lights will be used to safely illuminate the work area.
- Construction vehicles and materials may be staged nearby.
- One traffic lane will be maintained in each direction. Flaggers and uniformed police officers will direct people driving and walking at the intersection of M Street Northeast and East Main Street.
- Street parking will be restricted in posted areas.
Please watch for equipment and signs in the area, travel slowly, and follow directions from flaggers and uniformed police officer 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 fall of 2025, crews will repair 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 our construction hotline at 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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