H.L. Mooney Advanced Water Reclamation Facility-Wide Improvements

Project Status:
Under Construction
Webpage Updated:
Apr 01, 2025

Project Description

Prince William Water’s award-winning H.L. Mooney Advanced Water Reclamation Facility (AWRF) in Woodbridge treats up to 24 million gallons of wastewater daily, meeting or exceeding federal and state standards. After treatment at Mooney AWRF, the reclaimed wastewater is released into Neabsco Creek, a tributary of the Potomac River. 

This infrastructure project is designed to improve operational resiliency and service levels, provide additional odor control, and allow the plant to continue meeting regulatory requirements. Project elements include enhancements to several areas of the Mooney facility: primary clarifier odor control upgrade; primary clarifier collection system improvements; primary clarifier electrical improvements; equalization basin modifications; Return Activated Sludge Building pump modifications; additional Ultraviolet equipment; yard valves replacement; supplemental carbon system improvements; alkalinity system upgrades; ferric system improvements; secondary clarifier improvements; plant structural protection and refurbishment.

Project Information

Project Start Date summer 2021
Construction Start Date fall 2023
Estimated Completion Date fall 2027

Current Project Activities

  • 1

    The H.L. Mooney Advanced Water Reclamation Facility Wide Improvements Project groundbreaking ceremony was held on December 6, 2023.

  • 2

    The Public Information Meeting and Project Tour occurred on May 6th. Presentation slides used during the meeting are now available in the project document section below for your reference.

  • 3

    Component 12: Ongoing repairs for Plant Structural Protection (miscellaneous assets).

  • 4

    Component 18: Ongoing work on the Fluidized Bed Incinerator Rehabilitation.

  • 5

    Component 19: Ongoing improvements to the Freight Elevator at the Solids Building.

  • 6

    Excavation and earth removal for the new Headworks building will begin on September 16, 2024, and will take place Monday-Friday from 6 a.m.-4 p.m. Truck traffic is expected to increase to 10-15 trucks per day, cycling throughout the day for 30-40 loads. This phase of work will continue for several months, extending into 2025. Most traffic impacts will be on-site, and dust and dirt control will be closely monitored. Street cleaning equipment will be on standby to ensure public roadways remain clear. 

Additional Information

The information shown reflects the current progress of the project.

In the News

Groundbreaking Ceremony (December 6, 2023)

Envision

Mooney Facility Wide Improvement Project is registered to meet the sustainability criteria in the Envision framework.