The Corbalis Water Treatment Plant is a state-of-the art water treatment facility which provides potable water to nearly 1.5 million people in northern Virginia. The facility was placed in service in 1982 and has undergone several upgrades and expansions since then. To meet the rising demand for water over the past two decades, the facility’s capacity has been expanded from an initial 50 million gallons per day to its current 150 million gallons per day capacity. The current Stage III Development Project will expand the plant’s capacity to 225 million gallons per day.

Corbalis Water Treatment Plant Stage III Expansion

Construction of the Stage III Development Project began in the Spring of 2005 and is anticipated to be complete in 2008. New facilities include an expanded Raw Water Control Chamber, Carbon dosing facility, Flocculation-Sedimentation basins, 75 MGD capacity granulated activated carbon filters and a new sodium hypochlorite system for safer water disinfection. There will also be 15 Million gallons of new on-site finished water storage in an expanded underground clearwell. Construction is about 90% complete at this time.

Pond C Improvements

The Pond C improvements project is part of the Corbalis Stage III Development Project. The project is currently 20% complete with final completion scheduled for autumn 2009. The Pond C project includes two decant basins, one chemical feed and pump building, and a concrete liner for pond C.

Corbalis Water Treatment Plant On-Site Power Generation
 
As part of Fairfax Water’s efforts to increase system reliability during loss of commercial power, a standby power generation facility will be constructed at the Corbalis Water Treatment Plant site.
 
The generators will be housed in a specially designed structure located partially below grade to reduce noise impacts to the lowest levels. The structure will be screened from public view by an earthen berm and visual buffer of mature and newly planted trees.
 
Project documents will be available to qualified bidders during the summer of 2008 and once awarded, the anticipated construction duration will be 30 months with a completion date in 2011.
 

Need More Information?

Mr. Dale Kovach
Manager, Construction

(703) 698-5600
Email: Corbalis Project Manager