Skip to main content
close

KingCounty.gov is an official government website. Here's how you knowexpand_moreexpand_less

account_balance

Official government websites use .gov

Website addresses ending in .gov belong to official government organizations in the United States.

lock

Secure .gov websites use HTTPS

A lock lock or https:// means you've safely connected to the .gov website. Only share sensitive information on official, secure websites.

King County Logo
Jun
02

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.

Active construction is anticipated to occur during the summer window (May to October) of 2025 to 2027 when the wastewater flow is lower.

Project area displaying 5 zones (work areas) and timeframe: Zone 36 (2026-2027), Zone 30 (2025), Zone 30 (2026), Zone 24 (2025) and Zone 18 (2025)
View map as PDF.

The M Street Trunk 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. Additional impacts may include on-street parking restrictions, and noise and odors from the diversion pumps. This project may include overnight work. We will share more details as plans develop and will keep the community informed.

Project update

Spring 2025

Construction starting Summer 2025

We are excited to announce that construction for the M Street Trunk Rehabilitation Project anticipated to start in the summer of 2025. The construction schedule is organized in zones based on the different pipe diameters along the M Street Trunk. Read our latest update to learn more.

Sign up for project updates

Subscribe for project updates by email or text to get updates, surveys, notices, and other information by email and/or text. You can unsubscribe anytime.

Project location

expand_less