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M Street Trunk rehabilitation

The M Street Trunk Rehabilitation Project will repair about 2.6 miles of deteriorated sewer pipes in the City of Auburn.

Project description 

The M Street Trunk Rehabilitation Project will repair approximately 2.6 miles of severely deteriorated 18, 24, 30, and 36-inch-diameter reinforced concrete pipe that has more than 100 side sewer connections to nearby properties. The project will also rehabilitate 45 precast maintenance holes.

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 the travelling public including detours, temporary lane closures, and bus stop impacts. We will work with the community to limit these disruptions and will share information about any impacts before they occur.  

View project map

Project update

November 2024

Soil surveying work starts November 18, 2024

A small team working for King County Wastewater Treatment Division will begin surveying along and near the M Street Trunk sewer pipes. Survey activities include shovel probing the soil and placing flags at areas of interest.

This is expected to last one day and will help inform the design of the M Street Trunk Rehabilitation Project.

The completion of the survey work may change depending on weather.

The map below shows the project area.

Map displaying surveying work areas along and near the M Street sewer pipeline.

What you can expect:

  • Work will be performed outside private property.
  • Work hours 7 a.m. to 5 p.m. on business days.
  • All roads including Main Street will remain open to traffic.

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Project location

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