Parkland/Brookdale Interceptor Phase 4

This project is the fourth of multiple phases necessary to provide increased capacity for the Parkland/Brookdale Sewer Interceptor. This is a critical project for Pierce County because this interceptor serves as a major passage that connects large areas of east Pierce County’s wastewater system to the Chambers Creek Regional Wastewater Treatment Plant in University Place.

About the project

This section of the existing 36- and 42-inch concrete sewer interceptor is nearing the end of their useful service lifecycle due to hydrogen sulfide corrosion, a type of a gas released from wastewater traveling through the pipes. This project also addresses capacity needs in the region as the existing pipe at this location is expected to reach capacity by 2028.

To build a system that will last well into the future and support the growing communities in Pierce County, we are replacing the existing infrastructure with a 72-inch interceptor that will convey wastewater from the intersection of Ainsworth Avenue South and Garfield Street South to an existing 72-inch sewer interceptor at 116th Street South and Spanaway Loop Road South. The new system will use materials made from corrosion-resistant materials, such as high-density polyethylene (HDPE).

Project contact

Erika Dinsmore, PE
Project Engineer
(253) 798-2529
[email protected]

Aaron Callanan, PE
Design Engineering Supervisor
(253) 798-4207
[email protected]

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Project Location

Work will take place at:

  • Spanaway Loop Road South between 116th Street South and Garfield Street South 
  • Garfield Street South between Spanaway Loop Road South and Ainsworth Avenue South
  • The intersection of Ainsworth Ave South and Garfield South 

Project map

What does this mean for me?


This project will increase the capacity of the existing interceptor to handle growth beyond 2024. It also replaces aging infrastructure with materials that are less likely to corrode, and so will last longer in the wastewater environment.


Pierce County will maintain existing sewer connections and make connections to the new interceptor where applicable. Pierce County will maintain service in the area without interruption by bypassing existing sewer flows.

Privately owned property in County right-of-way 

The contractor will need to make use of the county right-of-way to install the sewer line. Property owners may need to remove privately owned items within the right-of-way that they wish to salvage prior to construction. 

Project Impacts

Once construction begins, this project will require road closures and traffic impacts to ensure safe and efficient operations. The contractor will be required to provide advance notice of any closures and maintain local and emergency vehicle access. 

We will provide the project schedule and traffic control plans before breaking ground. We encourage you to sign up for email updates to stay informed of new developments.


  • September 2021: Begin groundwater monitoring for multiple Parkland/Brookdale Interceptor project phases
  • October 2021: 15% Design completed for multiple Parkland/Brookdale Interceptor project phases
  • June 2023: 30% Design completed for Phase 4
  • July 2023: Conduct soil explorations off of Spanaway Loop Road South
  • September 2023: 60% Design completed for Phase 4
  • September/October 2023: Conduct Cultural Resources Assessment
  • December 2023: Finalize easements and design for Phase 4
  • January 2024: Advertise project for bids
  • Spring/Summer 2024: Begin construction

What is a sewer interceptor?

A sewer interceptor is a major sewer line that receives wastewater flows from multiple collection lines. These could be main or trunk sewers, or force mains, or other kinds of sewer lines. This combined flow is then directed to a wastewater treatment facility or another interceptor.


  1. July 2023
  2. Aug. 13, 2021

July 2023

Pierce County is working with a contractor that will be occupying portions of the right-of-way on the week of July 24 to stage equipment for the soil drilling activities. You may not be able to access the areas within the right-of-way during this work. 

Soil explorations or geotechnical drilling helps us better understand the changes in underground materials within a construction site and how they may impact the future construction work.

We will notify property owners in advance whose access to their driveways will be impacted during the work.

Please plan accordingly and travel with caution.