The Washington Aqueduct maintains and operates the Dalecarlia and McMillan Water Treatment Plants which serve reliable and safe potable water to the District of Columbia, Arlington County and the City of Falls Church, VA. Historically, river solids removed during the water treatment process have been disposed of by returning them to the Potomac River. The reissued version of the National Pollution Discharge Elimination System (NPDES) permit precludes the discharge of river solids or residuals to the river.
The Residuals Project Involves:
Construction of equipments and facilities that collects water treatment residuals from three different locations: Dalecarlia Sedimentation Basins, Georgetown Reservoir and the Dalecarlia Reservoir Forebay.
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Construction of a residuals collection system and pumping station at each location.
The residuals will be collected at the three location and then transferred through piping systems to a central processing facility for dewatering and then loading disposal.
To learn more about the residuals management process read the final Executive Summary in the Environmental Impact Statement.
Milestone Schedule
The construction contract was awarded in March 2008 and the builder Archer Western began mobilization activities in May 2008. The project is anticipated to be complete in September 2010. The attached milestone schedule provides more details.
For further questions about the status of the residuals project please contact:
Chief, Planning & Engineering Branch
Tel: 202-764-2776
Fax: 202-764-2756
Email: Nathan.H.Cole@usace.army.mil
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