Construction crews will install equipment to monitor groundwater levels around the M Street Trunk sewer pipe starting as early as Tuesday, December 2.
During this work, crews will dig small holes in the street and install the equipment beneath them. They will then restore the surface and cover the openings with steel lids. This will allow the project team to continue monitoring groundwater levels. Crews will return two to three working days later to collect ground water samples.
 Map of the drilling location at Pike Street Northeast and 12th Street Northeast.
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Anticipated work hours for the drilling work are weekdays from 7:30 am to 6 pm, as early as Tuesday, December 2. The schedule may change depending on weather conditions and traffic control set up.
- Local road access will be maintained during this work.
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Street parking will be restricted in work areas.
- Access to driveways, sidewalks, and pedestrian walkways will be maintained.
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Nearby neighbors may experience vibrations and noise from the drilling equipment.
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.
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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