The Merrywood Force Main Rehabilitation project included rehabilitation of 1,080 linear feet of 6-inch force main, its discharge manhole, and the installation of a future bypass system in front of the pump station.

1. A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
Project No. WW-000008-006
Dranesville District
Tax Map No. 31-2
January 2019
MERRYWOOD FORCE MAIN REHABILITATION

2. Project Details
Merrywood Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Description:
The Merrywood Force Main Rehabilitation project was substantially completed on
January 4, 2019. This project included rehabilitation of 1,080 linear feet of 6 inch force
main, its discharge manhole, and the installation of a future bypass system in front of the
pump station.
Project Overview:
• Roughly 780-linear feet of force main was rehabilitated with Cured-In-Place-Pipe
(CIPP) lining
• Roughly 300-linear feet of lined force main had to be replaced with Ductile Iron Pipe
due to a crack that formed on the lining during testing
• A future emergency bypass system was installed at the pump station
• The discharge manhole was rehabilitated with cementitious lining
Project Team:
• Tenzin Jigme, Wastewater Design and Construction Division
• Robert White Jr., Wastewater Collections Division
• Christopher Mata, Wastewater Design and Construction Division
• Engineer: Rummel Klepper & Kahl, LLP (RK&K)
• Contractor: Flippo Construction Company, Inc.

3. Merrywood Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
2700 Tintagel Road, Tax Map 31-2
Roughly 300-LF of
FM replaced with
Ductile Iron Pipe
Relined
sewer pipe

4. Merrywood Forcemain Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Pre-Existing Conditions
Force Main
Discharge
Manhole
Forcemain
Merrywood
Pump Station
Merrywood
Community
Chain Bridge Road

5. Merrywood Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
By-Pass Pumping
Merrywood
Pump Station
By-pass Pumps
By-pass Pipes

6. Merrywood Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
During Lining
Lining Pit
Lining Process
Lining Truck
Lined Pipe

7. Before After
Capital Facilities/Wastewater Design and Construction Division
- Unlined Pipe - Lined Pipe
Merrywood Force Main Rehabilitation
Unlined vs. Lined Pipe

8. Before After
Capital Facilities/Wastewater Design and Construction Division
- Lining Pit - Restored
Lining Pit Before and After
Merrywood Force Main Rehabilitation

9. Additional Information
For additional Information, please call
www.fairfaxcounty.gov/publicworks
Merrywood Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Matthew Kaiser, Public Information Officer
703-324-8455, TTY 711
Matthew.Kaiser@fairfaxcounty.gov