Surveying work, December 16-20, 2024

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M Street Trunk Rehabilitation project masthead

December 11, 2024

Surveying work starts December 16 continuing through December 20, 2024

Starting as soon as Monday, December 16, a small team working for King County Wastewater Treatment Division will conduct a field assessment along and near the M Street Trunk sewer pipes to inform the project design. Personnel will use hand shovels and mesh screens to examine soil at up to 200 locations.  

This assessment is expected to last through Friday, December 20th, and will provide valuable information to support the design of the M Street Trunk Rehabilitation Project. 

The map below shows the location of the utility investigation work areas.

M Street Trunk Rehabilitation map

What you can expect

  • Work will be performed outside private property.
  • Work hours are 7:30 a.m. to 4:30 p.m. on business days between December 16 and 20, 2024.
  • All roads, including Main Street, will remain open to traffic.

About the project

The M Street Trunk collects and carries untreated wastewater from homes, businesses, and schools in your neighborhood and sends it to the South Treatment Plant in Renton, where it is cleaned and released into Puget Sound. 

The M Street Trunk Rehabilitation Project will repair approximately 2.6 miles of reinforced concrete pipe that has more than 100 side sewer connections to nearby properties. The project will also rehabilitate 45 precast maintenance holes.

The rehabilitation work will keep the M Street trunk working for you and your neighborhood for decades, avoiding failure, overflow, and service disruptionDuring this work, all the wastewater carried through the M Street Trunk must be sent into a temporary system of pumps and bypass pipes above and below ground to maintain sewer service to the community. 

This pipe serves a densely populated area with many schools, homes, and businesses in the City of Auburn. During construction for the project, there will be impacts to traffic, including detours, temporary lane closures, and bus stops. We will work with the community to limit these disruptions and will share information about any impacts before they occur.

Anticipated Project Schedule

Project schedule image: Pre-design (2022 to 2024), Design (Winter 2024 to Winter 2026) and Construction (Winter 2026 to Summer 2027)

Questions?

Contact Demmelash Adera at 206-263-2340 or email deadera@kingcounty.gov

Visit the project website to learn about the project and the survey route map at kingcounty.gov/MStreetTrunkRehab.

We will provide an interpreter at no cost.