Water and Wastes Digest (W&WD) honored the Back River Wastewater Treatment Plant project with a 2016 Top Project award at a ceremony held during the Annual Water Environment Federation Technical Exhibition and Conference (WEFTEC) in New Orleans, Louisiana. The Top Project award is presented to 10 water or wastewater projects that were in the design or construction phase over the past 18 months. The winning projects are selected based on innovations, long-term impact on the communities and challenges met.
W&WD recognized the project’s complex and aggressive schedule needed to meet the Back River Wastewater Treatment Plant’s goal of reducing nitrogen and phosphorus pollutants in the Chesapeake Bay. The construction of the fourth and newest Activated Sludge Plant will help provide the additional level of treatment necessary to achieve Enhanced Nutrient Removal at the facility. KCI performed the design and is now providing construction phase services for the 180-million-gallon-per-day treatment facility, which will supplement the treatment currently provided by Activated Sludge Plants 2 and 3. The major components of the plant upgrade included the design of five acres of activated sludge tanks, consisting of 40 million gallons; 12 – 120’ secondary clarifiers; three sludge pumping stations; and a Blower Building, housing 14 – 350 HP Turbo blowers. The contractor elected to install an onsite concrete batch plant in order to effectively place over 100,000 cubic yards of concrete. Our team also conducted an extensive geotechnical investigation. Due to the poor soil conditions, KCI recommended that the entire facility be installed on deep foundations, which consisted of the installation of 7,000 auger cast-in-place piles up to 75 feet deep. The project was scheduled for completion in May 2017.
All of the winners were profiled in W&WD’s December 2016 Annual Reference Guide issue.