Public Works and Environmental Services

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703-324-5800 TTY 711
12000 Government Center Parkway
Suite 449 Fairfax, VA 22035
Carey Needham
Director, Capital Facilities

Covanta Force Main Replacement

Project Number: WW-000001-034

Project Update: May 22, 2023

Project Background

After reviewing the force main near Covanta Pump Station in Lorton, Virginia it was determined the existing DIP force main was eroding from the inside out due to the increase in acidity levels from the landfill leachates and increase abrasion from the Covanta Energy/Resource Recovery Facility cooling water towers that were conveyed in the existing force main.

Project Description

The work to be completed for the Covanta Force Main Replacement project consists of replacing approximately 2,600 LF of the existing 8” Ductile Iron Pipe (DIP) force main with 8” HDPE from the Covanta Pump Station valve vault to the Lorton Road’s Right-of-Way (ROW). Then, it will encompass replacing approximately 4,100 LF of 8” DIP with 8” of HDPE from the intersection of Lorton Road to the terminal manhole of the existing force main, manhole 107-4-165.

Project Location

Adress: 9898 Furnace Rd Lorton, VA 22079 (Covanta Energy Plant)

Map - Covanta Pump StationBlue square is the Covanta Pump Station. Orange Box encompasses Phase One. Green Box encompasses Phase Two. Red broken line in the rectangular boxes is the alignment of the Force Main.

Project Phase

The project is progressing through the Design Phase. The county and selected engineering consultant firm, CDM Smith, are working on completing the Phase 1 95% design and Phase 2 70% design.

Project Benefits

  • Provide a reliable sanitary sewer system in the Lorton community.
  • Prevent costly future emergency repairs.
  • Reduce the likelihood of sanitary sewer overflows from a defect in the line.
  • Diminish risk to public health and the environment.


Estimated Start and Finish for Phase 1 September 2023 - May 2024
Estimated Start and Finish for Phase 2 TBD

What to Expect

The project will be awarded to a qualified responsible contractor within our Job Order Contract for Linear Construction once the design phase is completed. All work will be inspected and supervised by Fairfax County to ensure quality. Every effort will be made to minimize disturbances and impacts to public and private areas. Careful consideration will be given to schedule construction activities to minimize disruption in the community. There will be no disruption to existing sanitary sewer service.

Project Cost and Funding Source

  • Project Cost = $12,944,000
  • Funding Source = 690-C69300 (Capital Improvement Program)


For more information, please email the project manager, Ricardo Fernandez at

Frequently Asked Questions

No, the force main replacement will not affect any resident’s sanitary services during construction.

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