Pierce County Public Works and Utilities completed the Facilities Plan and accompanying Environmental Impact Statement (EIS) for the Chambers Creek Regional Wastewater Treatment Plant Expansion project. The final EIS includes all environmental review information.

The Facility Plan and EIS will guide the Sewer Utility in the design, construction and future upgrades of the treatment plant over the next 30 years.

The EIS addresses project impacts to the existing wastewater treatment plant (WWTP) and surrounding area. During the EIS development process the Sewer Utility held public meetings and sent out over 300 notices to surrounding landowners advising them of the proposed expansion of the WWTP.

The primary purpose of the Chambers Creek facility is to treat sewage flows from the approved sewer service basin. The basin consists mainly of Urban Growth Areas in unincorporated Pierce County that are not within another approved sewer service area.

The Pierce County Sewer Service Basin covers 117 square miles and includes the cities of Lakewood, University Place, DuPont, Milton, and the unincorporated urban areas of Parkland, Spanaway, South Hill, Frederickson, Fife Heights, Graham, Brown's Point/Dash Point, Sunrise, and Cascadia. Contract sewer services are also provided to the Town of Steilacoom and portions of the cities of Tacoma, Fife, and Edgewood.