The McDowell Creek Wastewater Treatment Plant expansion increased capacity to 12 million gallons per day (MGD) and involved two phases of construction. Phase I included conversion of the existing filtrate equalization basin to a primary clarifier and construction of a new biological treatment basin, final clarifier, primary sludge pumping station, RAS/WAS pumping stations, blower building, membrane filtration building with reuse pumping station, chemical feed facilities, and cascade aeration structure, along with all associated site and electrical work. Phase II, with a schedule duration of 18 months, involved construction of a new influent pumping station and headworks, day tank, equalization basin, primary clarifier, biological treatment basin, final clarifier, effluent filter structure, anaerobic digester, and digester control building, as well as all associated site and electrical work.

The concrete work for this project included 19 structures totaling 37,835 cubic yards. Process equipment provided for the project was extensive, including 76 pumps in various sizes and applications.