Constantine designed and permitted the 3 million-gallon-per-day (mgd) expansion to the existing 9-mgd Sandy Run Creek Water Pollution Control Plant (WPCP) for the City of Warner Robins, Georgia. The plant expansion, which represents the largest public works project in the City's history, was critical for future growth in Warner Robins and in neighboring middle Georgia communities that rely on Warner Robins to receive and treat wastewater. The project included additional processes for the expanded capacity and to meet lower effluent nitrogen and phosphorous NPDES permit limits imposed by the Environmental Protection Division (EPD) of the State of Georgia Department of Natural Resources.The original preliminary design developed by another firm would have cost the City over $50-million to implement, and did not include nutrient removal. Constantine's plan for expansion and increased treatment quality, on the other hand, cost approximately $27.5-million for permitting, design and construction. As part of the Design-Build project delivery team, Constantine provided start-up services for the expanded and improved treatment plant.