Difficult Run Force Main Rehabilitation

1. A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
Difficult Run Force Main Rehabilitation
Project No. WW-000008-003
Hunter Mill and Dranesville Districts
October 20, 2017

2. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division

3. Project Details
Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Description:
Rehabilitation of a 5.7 mile 36-inch force main sanitary sewer between Great Falls and Vienna
to serve the concurrently-rehabilitated Difficult Run Pump Station located off Colvin Run
Road in Great Falls. This project was substantially complete on October 6, 2017.
Project Overview:
• Cleaning, video inspection, rehabilitation, and hydrostatic testing of approximately 30,000
linear feet of 36” ductile iron and steel force main sewer.
• Removal and replacement of approximately 2,600 linear feet of 36” pipe.
• Structural (Cured-in-Place) re-lining of approximately 4,000 linear feet of pipe.
• Completion of approximately 60 internal and external joint repairs along pipeline.
• Installation of six concrete access vaults for future maintenance and inspection of the
force main.
Project Team:
• Andy Royse, P.E., Wastewater Design and Construction Division
• Shwan Fatah, P.E., Wastewater Collection Division
• Jonathan Okafor, P.E., Wastewater Collection Division

4. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Project Location – Colvin Run Road in Great Falls to Glengyle Drive in Vienna

5. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Timber matting used to access force main locations along the Difficult Run Stream
Valley

6. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Access and staging area near Rhapsody Drive in Vienna for pipe re-lining and pipe
replacement work

7. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Pipe replacement in Vienna

8. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Preparing for structural re-lining of force main on Carey Lane in Vienna

9. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Cured-in-place re-lining of pipe on Glengyle Drive in Vienna

10. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Transition coupling connecting steel pipe to ductile iron pipe

11. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Connecting re-lined pipe to ductile iron pipe section

12. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Providing thrust restraint

13. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Permanent access vault over cut steel pipe

14. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Securing removable ductile iron spool piece inside access vault

15. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Site restoration along force main easement

16. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Site restoration in neighborhoods

17. Difficult Run Force Main Rehabilitation
Capital Facilities/Wastewater Design and Construction Division
Site restoration on Glengyle Drive in Vienna

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