The Waynewood I Force Main Rehabilitation Project rehabilitated roughly 700 feet of aging asbestos cement force main piping servicing the Waynewood I pump station through cured-in-place pipe lining. This minimally invasive lining method required only small excavations. The project also installed an emergency bypass vault, relocated overhead utility lines underground, and improved site access. Completed in December 2020, the improvements are expected to increase the force main's lifespan by 50 years and reduce risks of sanitary sewer overflows.

1. A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
Project No. WW-000008-009
Mount Vernon District
January 8, 2021
Waynewood I Force Main Rehabilitation Project

2. Project Details
Waynewood I Force Main Rehabilitation Project
Capital Facilities/Wastewater Design and Construction Division/Collections Branch
Description:
The Waynewood I sewer pump station and its forcemain were built in the late 1950s. This project included the
rehabilitation, by cured-in-place pipe lining, of roughly 700-feet of 8” forcemain made from asbestos cement pipe. The
lining method presented less disturbance to the community compared to full replacement, as only minimal excavation
was required. Two relatively small pits were excavated to access portions of the existing forcemain. A temporary sewer
by-pass system was set up to convey flow during the lining. A permanent emergency by-pass vault was installed near the
pump station, and the overhead power and communication feed to the pump station was re-routed through an
underground conduit. The improvements are expected to increase the useful life of the force main by at least 50-years
and reduce the risk of sanitary sewer overflows at the pump station. This project was substantially complete on
December 9, 2020.
Project Overview:
- Rehabilitated the sewer forcemain using a Cured-in-Place-Pipe (CIPP) Lining method
- Installed a new emergency by-pass connection to the sewer pressure pipe and constructed an underground vault to
house the valves
- Relocated overhead power and communication cables to the pump station to underground for safety and reliability
- New access road and related site improvements
Project Team:
• Wastewater Design and Construction Division: Christopher Mata, P.E., Colleen Block, P.E., Matt Doyle, P.E.
• Wastewater Collection Division : Sara Ferrance, P.E., Shwan Fatah, P.E.
• Engineer: Rummel, Klepper & Kahl, LLP
• Contractor: Flippo Construction Company, Inc.

3. Waynewood I Force Main Rehabilitation Project
Capital Facilities/Wastewater Design and Construction Division/Collections Branch
Mount Vernon District, Tax Map No. 102-4
Forcemain
Waynewood I
Pump Station

4. Waynewood I Force Main Rehabilitation Project
Capital Facilities/Wastewater Design and Construction Division/Collections Branch
Sewer By-pass Vault Install & Access Road for Lining Pit
Construction Access Road off Doter Dr.
Permanent By-pass Vault Installation

5. Waynewood I Force Main Rehabilitation Project
Capital Facilities/Wastewater Design and Construction Division/Collections Branch
Conduit Install & Lining Pit Excavation
Electrical and Communication Conduit Installation
Access Pit Excavation

6. Waynewood I Force Main Rehabilitation Project
Capital Facilities/Wastewater Design and Construction Division/Collections Branch
Temporary By-Pass Pumping System

7. Waynewood I Force Main Rehabilitation Project
Capital Facilities/Wastewater Design and Construction Division/Collections Branch
Cut into Sewer Pipe, Pre-Inspection & Cleaning
Old 8” Asbestos Cement Pipe (ACP) Forcemain
Camera Inspection of Existing 8” ACP Forcemain

8. Waynewood I Force Main Rehabilitation Project
Capital Facilities/Wastewater Design and Construction Division/Collections Branch
Cured-in-Place-Pipe (CIPP) Lining

9. Waynewood I Force Main Rehabilitation Project
Capital Facilities/Wastewater Design and Construction Division/Collections Branch
Cured-in-Place-Pipe (CIPP) Pressure Testing

10. Before After
Capital Facilities/Wastewater Design and Construction Division/Collections Branch
Waynewood I Force Main Rehabilitation Project
Completed Vault Installation and Driveway Restore Work

11. Before After
Capital Facilities/Wastewater Design and Construction Division/Collections Branch
Waynewood I Force Main Rehabilitation Project
Access Road for Lining Pit

12. Additional Information
For additional Information, please call
www.fairfaxcounty.gov/publicworks
Waynewood I Force Main Rehabilitation Project
Capital Facilities/Wastewater Design and Construction Division/Collections Branch
Irene Haske, Communications Specialist
703-324-5821, TTY 711
Irene.Haske@fairfaxcounty.gov