The Passaic Valley Sewerage Commission (PVSC) operates one of the oldest and largest regional wastewater utilities in the United States, serving more than 1.5 million residents across five New Jersey counties. After Superstorm Sandy inundated the Newark plant with brackish floodwaters from Newark Bay – leaving the facility inoperable for 48 hours and reducing treatment capacity for two weeks – PVSC, in partnership with FEMA, launched a major resilience initiative to safeguard the 140‑acre campus against future coastal storm events. STV was selected to design critical hardening measures to protect vital infrastructure and ensure the continuity of operations.
What challenges did STV address?
PVSC needed a comprehensive flood‑protection strategy that responded to site‑specific vulnerabilities, including storm surge, wave action and exposure to tidal flooding. The facility’s size, proximity to Newark Bay and the complexity of its interconnected systems required a solution capable of defending the plant without disrupting ongoing wastewater treatment operations. Modeling future climate-driven impacts was essential to ensure long-term resilience.
What solutions did STV deliver?
STV designed a 2.5-mile-long floodwall system to encircle and protect the wastewater treatment plant. The team conducted a site-specific coastal model calibrated for a 500-year mean recurrence interval to determine accurate wave and storm‑surge elevations. Additional improvements integrated green infrastructure, including a landscaped employee outdoor space and a porous‑concrete walking path with benches, supporting both flood resilience and site usability.
How does this project benefit the region?
The resilience program significantly reduces the risk of wastewater service disruption during extreme storms, improving environmental protection for surrounding waterways and enhancing public health outcomes. Strengthening PVSC’s infrastructure also supports long‑term operational reliability for more than 1.5 million residents and businesses across northern New Jersey.
Key Stats and Accolades
- 2.5‑mile facility‑wide floodwall
- 140‑acre wastewater treatment campus protected
- 1.5 million residents served by PVSC
- Site‑specific 500‑year recurrence interval coastal modeling
- Integrated green infrastructure enhancements
