The Back River Wastewater Treatment Plant requires upgrades to meet new permit limits regarding discharge of nitrogen and phosphorus, and help clean Chesapeake Bay water. The project includes the construction of an enhanced nutrient removal process upgrade, along with chemical feed facilities, 52 biological filters and a 300-MGD pumping station. The scope of work also includes modifications for two activated plants and new plant infrastructure such as roads, control systems and utility areas.
The plant occupies a 466-acre site and has a 35-foot elevation difference that allows wastewater to flow through the plant entirely by gravity. An estimated 1.3 million residents in a 140-square-mile area of Baltimore City and County are served by this plant.