Chambers Creek Regional Wastewater Treatment Plant Expansion

With a service population expected to grow by 130 percent over the next 30 years, Pierce County, Washington, is expanding the Chambers Creek Regional WWTP to accommodate the full range of potential effluent limitations. Brown and Caldwell is helping implement improvements to add 50 percent more capacity, recycle more than 25 percent of the water flow and significantly increase the level of treatment using biological nutrient removal. The team is integrating an Anammox sidestream treatment process (called DEMON®), and once completed, it will be one of the largest installations in North America. The project site is being transformed into a community asset with public access to a Puget Sound waterfront park and championship golf course — host to the USGA 2015 U.S. Open.