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H.L. Mooney Advanced Water Reclamation Facility Wide Improvements

Webpage Updated May 16, 2023

Project Manager

Shannon Spence, P.E.

Project Description (Updated 10/25/2022)

The Service Authority’s award-winning H.L. Mooney Advanced Water Reclamation Facility (AWRF) in Woodbridge treats up to 24 million gallons of wastewater per day, 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 levels of service, provide additional odor control and allow the plant to continue meeting regulatory requirements. Project elements will 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 Activities

The Board of Directors approved the 80% Design and Guaranteed Maximum Price (GMP) award to Ulliman Schutte Construction, LLC, and Consultant Professional Services for the Design-Build Services award to AECOM, Inc. in September 2021.

In the News:

Connolly tours Woodbridge wastewater plant, promotes $2.1 trillion spending bill

Service Authority Wastewater Facility Earns 13th Consecutive National Regulatory Compliance Award (Prince William Living)


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