The new 4-inch ductile iron force main will serve the surrounding community for the foreseeable future. Replacement of the force main will: Reduce the level and frequency of maintenance required to keep the force main operating. Prevent costly emergency repairs. Provide residents with safe, reliable utility infrastructure. Enhance the quality of life for residents. Reduce risks to public health and the environment.

1. A Fairfax County, VA, publication
Department of Public Works and Environmental Services
Working for You!
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
Project No. WW-000008-012
Wastewater Design and Construction Division, Wastewater Collection Branch
April 14, 2022

2. Introductions
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
• Fairfax County
– Natasha Schmidt, P.E., Project Manager
– Department of Public Works and
Environmental Services Staff
– Mount Vernon District Board of Supervisors
• Engineering Consultant (Arcadis U.S., Inc.)
– Matt Roder, P.E., Project Manager
– Other Arcadis Staff
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch 2

3. Meeting Agenda
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
• Wastewater Division – Who We Are
• Existing Force Main
• Project Benefits
• Proposed Force Main
• Construction Sequence, Post-Construction Pavement Restoration, and Traffic Control
• Bypass Pump Piping – Example Photo
• Anticipated Schedule
• Questions and Answers
• Adjourn Meeting
3

4. Wastewater Division – Who We Are
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
• Protect Public Health and Water
Quality
• Among the Nation’s Largest Sanitary
Sewer Systems
• How is Wastewater Generated?
(sinks, laundry machines, showers/tubs, and
toilets)
• Plan, Design, Operate and Maintain
- 3,250 Miles of Pipe (gravity and force main)
- 60+ Pump Stations
- 250,687 Residential Accounts
- 14,718 Commercial Accounts
• Treat 41 million gallons per day at
Noman Cole PCP
• Once Treated, Water is Released
Back Into Region’s Waterways
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch 4
Visit us on the internet at:
https://www.fairfaxcounty.gov/publicworks/wastewater/about

5. Existing Force Main
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
• 4-Inch Diameter (Cast Iron Pipe)
• Installed in 1970 (52 years old)
• Approximately 657 Feet in
Length
(Riverwood Pump Station to Existing
Manhole #27 in Riverwood Road)
• Located in a 15-Foot Wide
Easement (Residential Property)
• Nearing the End of its Useful
and Practical Life
• Replacement is Required
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch 5

6. Existing Force Main
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch 6

7. Project Benefits
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch 7
The new 4-inch ductile iron force main
will serve the surrounding community for
the foreseeable future. Replacement of
the force main will:
• Reduce the level and frequency of
maintenance required to keep the force
main operating.
• Prevent costly emergency repairs.
• Provide residents with safe, reliable
utility infrastructure.
• Enhance the quality of life for
residents.
• Reduce risks to public health and the

8. Proposed Force Main
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch 8

9. Proposed Force Main
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch 9

10. Construction Sequence
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch 10
3. Connect new force main to pumping station and manhole.
2. Set up bypass pumping system and take existing force main out of service.
4. Remove bypass pumping system. Abandon existing force main by filling with lightweight concrete.
1. Install most of new force main while existing force main stays in operation.

11. Note: There will be temporary pavement repairs while construction is ongoing
Post-Construction Pavement Restoration
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch

12. Lane Closures
Day Night
Mon - Thur 9:00 A – 3:30 P 9:00 P – 5:00 A
Friday 9:00 A – 2:00 P 10:00 P – 9:00 A
Saturday Not Allowed 9:00 P – 9:00 A
Sunday Not Allowed 10:00 A – 5:00 A
Traffic Control
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch

13. Bypass Pump Piping – Example Photo
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch 13

14. Anticipated Schedule
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch 14
Complete Detailed Design
Community Outreach Meeting
Commence Construction
Complete Construction
March 2022
April 14, 2022
June 2022
December 2022
This is the anticipated schedule only. Ongoing supply
chain issues may impact necessary material deliveries and
impact the construction schedule.

15. Questions and Answers
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch 15
Questions???

16. For additional information, please contact
www.fairfaxcounty.gov/publicworks
Additional Information
RIVERWOOD FORCE MAIN REHABILITATION – COMMUNITY MEETING
Natasha Schmidt
703-324-5080 (Direct) or 571-407-4529 (Mobile)
Natasha.Schmidt@fairfaxcounty.gov
Capital Facilities/Wastewater Design and Construction Division/Wastewater Collection Branch 16