Securing a Resilient Future with New Technology and Alternative Delivery Construction: Lessons Learned from the NCPCP Disinfection Improvements Project

The Fairfax County Department of Public Works and Environmental Services (DPWES) owns and operates the 67 mgd Noman Cole Jr. Pollution Control Plant (NCPCP) in Lorton, VA. The facility uses preliminary, primary, secondary and tertiary treatment to meet stringent wastewater discharge criteria for the effluent that ultimately flows into the Chesapeake Bay. DPWES is in the process of implementing $700M in capital improvement and reinvestment projects over the next 10 years. These improvements will span the entire treatment process as well as many support systems and ensure the County continues to maintain a high-quality effluent for decades to come. In 2014 Fairfax County undertook an evaluation of their disinfection process to address aging infrastructure and develop a long-term approach for resilient tertiary treatment through implementation of advanced disinfection technology, sustainable design, and alternative delivery construction. This case study provides a summary of Fairfax County's award winning Disinfection Improvements Project from design, through construction, and commissioning. It will focus on the unique aspects of the project that demonstrate Fairfax County's approach to securing a resilient future and provide valuable insight for utilities planning high-profile capital improvement projects.