Mallard Creek WRF Phase 1 Improvements

The Mallard Creek Water Reclamation Facility expansion advances liquid and solids process improvements at one of Charlotte Water’s primary wastewater treatment plants. By integrating technology and infrastructure enhancements, the project increases capacity from 13.1 mgd to 16 mgd, supporting continued development throughout the Charlotte area.

Liquid Process Train Improvements

At the center of this expansion, PC is constructing a three-level-deep, 12.8-mgd influent pumping station designed to optimize flow and reliability. The new pump station features advanced mechanical bar screens, Parshall flumes, dry-pit submersible pumps, and a 72-inch influent sewer line. The addition of two 42-foot-tall flow equalization tanks—one with a 14.7-million-gallon capacity and the other 5.3 million gallons—provides improved process efficiency and system resilience.

Additional improvements include new alkalinity storage and feed facilities housing two welded steel tanks with a combined volume of 20,000 gallons; plant drain piping improvements; and rehabilitation of the grit removal system.

Solids Handling Process Improvements

The project also delivers significant upgrades to the solids handling process. Improvements include the installation of two thickening centrifuges and a dewatering centrifuge in addition to a new polymer feed system with activation units, aging tanks and feed pumps.

The project is pursuing Envision Verified certification and focuses on delivering resilient, sustainable infrastructure to deliver long-term value to the Charlotte community.