Nansemond Treatment Plant Advanced Nutrient Reduction Improvements (ANRI)/Nansemond SWIFT Facility

The first step to producing SWIFT Water® is at the Nansemond Treatment Plant Advanced Nutrient Reduction Improvements (ANRI) project. This project will increase the wastewater treatment capacity to 50 million gallons per day (mgd) and provide a higher quality of wastewater. This additional capacity will accommodate the flow from the Boat Harbor Treatment Plant which is closing in 2025. The Boat Harbor Treatment Plant is being converted to a pump station, which will send flow to the Nansemond Treatment Plant. Once the treatment plant upgrades are completed, the final step in the project will be the construction of the Nansemond SWIFT Facility project. A transmission force main will be constructed across the James River to connect HRSD’s facilities. Section 1 of the transmission force main is a design-build project to place the force main under the James River.

This project includes installation of a 48-inch HDPE transmission force main to convey the flows from Newport News to the Nansemond Treatment Plant. The shipping channel will be crossed by horizontal directional drilling, estimated at 4,400 linear feet. The remaining 20,200 linear feet of the crossing will be installed using surface methods.

L. S. Caldwell & Associates, Inc. (LSC) had responsibility for the development, implementation, and monitoring of the compliance program for the Hampton Roads Sanitation District’s (HRSD) Sustainable Water Initiative for Tomorrow (SWIFT) program.  The SWIFT program is an innovative water treatment project in eastern Virginia designed to further protect the region’s environment, enhance the sustainability of the region’s long-term groundwater supply and help address environmental pressures such as Chesapeake Bay restoration, sea level rise and saltwater intrusion. This ten (10) year multi-billion-dollar program has various funding sources at the state and federal level and is scheduled to be completed in 2030.