Flatlick Sewer Rehabilitation Project Phase 1 and 2
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The Flatlick Sewer Rehabilitation Project included rehabilitation of approximately 2,500 linear feet of existing 24-inch diameter pipe and 650 linear feet of existing 15-inch diameter pipe using the Cured in Place Pipe (CIPP) lining method. The lining was cured using UV Light. In addition, 11 manholes were rehabilitated throughout the Flatlick Branch stream valley in Chantilly, Virginia. This project was substantially complete on January 4, 2021.
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Flatlick Sewer Rehabilitation Project Phase 1 and 2
- 1. A Fairfax County, VA, publication Department of Public Works and Environmental Services Working for You! Project No. WW-000007-014 C & D Sully District February 8, 2021 Flatlick Sewer Rehabilitation Project Phase 1 and 2
- 2. Project Details Flatlick Sewer Rehabilitation Project Phase 1 & 2 Capital Facilities/Wastewater Design and Construction Division/Collections Branch Description: The Flatlick Sewer Rehabilitation Project included rehabilitation of approximately 2,500 linear feet of existing 24-inch diameter pipe and 650 linear feet of existing 15-inch diameter pipe using the Cured in Place Pipe (CIPP) lining method. The lining was cured using UV Light. In addition, 11 manholes were rehabilitated throughout the Flatlick Branch stream valley in Chantilly, Virginia. This project was substantially complete on January 4, 2021. Project Overview: • Cured-in-place pipe lining (cured using UV light) • Manhole rehabilitation using cementitious and epoxy coatings • Bypass pumping system • 3,000 linear feet of access road • Permitting: US Army Corps of Engineers Nationwide Permit #12, Virginia Department of Transportation Land Use Permit, Fairfax County Park Authority • Challenge – maintaining access roads and bypass pumping operations during flooding events Project Team: • Matt Doyle, P.E. - Wastewater Design and Construction Division • Suzy Harding, P.E. - Wastewater Design and Construction Division • Colleen Block, P. E. - Wastewater Design and Construction Division • Tom Richardson, P.E. - Wastewater Collection Division • Shwan Fatah, P.E. - Wastewater Collection Division • Arcadis - Engineer • Flippo Construction Company - Contractor
- 3. Flatlick Sewer Rehabilitation Project Phase 1 & 2 Capital Facilities/Wastewater Design and Construction Division/Collections Branch Sully District, Tax Map No. 44-2 Project is located along Flatlick Branch from Lee Jackson Memorial Highway to Walney Road.
- 4. Flatlick Sewer Rehabilitation Project Phase 1 & 2 Capital Facilities/Wastewater Design and Construction Division/Collections Branch Construction of Mulch & Mat Access Roads Mulch and timber-mat access roads were installed to reach the sewers in the Flatlick Branch stream valley.
- 5. Flatlick Sewer Rehabilitation Project Phase 1 & 2 Capital Facilities/Wastewater Design and Construction Division/Collections Branch Tree Protection Tree protection
- 6. Flatlick Sewer Rehabilitation Project Phase 1 & 2 Capital Facilities/Wastewater Design and Construction Division/Collections Branch Jersey Barriers and Steel Plates to Control Flooding Various measures were used to mitigate effects of flooding on the construction site, including Jersey Barriers and steel plates to hold matting in place.
- 7. Flatlick Sewer Rehabilitation Project Phase 1 & 2 Capital Facilities/Wastewater Design and Construction Division/Collections Branch Bypass Pumping System Laying out bypass piping at Phase 1 Construction Entrance Bypass pumps and piping configuration at Phase 1 Construction Entrance
- 8. Flatlick Sewer Rehabilitation Project Phase 1 & 2 Capital Facilities/Wastewater Design and Construction Division/Collections Branch Bypass Pumping System Pressure testing the bypass pumping system Piping in discharge manhole. Piping in suction manhole.
- 9. Flatlick Sewer Rehabilitation Project Phase 1 & 2 Capital Facilities/Wastewater Design and Construction Division/Collections Branch Bypass Pumping System: Bypass Piping Bypass piping laid out along Phase 2 access road
- 10. Flatlick Sewer Rehabilitation Project Phase 1 & 2 Capital Facilities/Wastewater Design and Construction Division/Collections Branch Manhole Rehabilitation MH 006 epoxy coating and new steps Backfilled phase 1 suction manhole Surface preparation of MH for lining
- 11. Flatlick Sewer Rehabilitation Project Phase 1 & 2 Capital Facilities/Wastewater Design and Construction Division/Collections Branch UV Cured-in-Place Pipe Lining Equipment UV light train Video monitoring during lining operation Unloading liner
- 12. Before After Capital Facilities/Wastewater Design and Construction Division/Collections Branch Flatlick Sewer Rehabilitation Project Phase 1 & 2 Manholes Before and after Lining Brick manhole channel Deteriorating manhole steps and concrete Rehabilitated manhole with epoxy coating of entire interior and new steps (plastic-wrap removed after epoxy application)
- 13. Before After Capital Facilities/Wastewater Design and Construction Division/Collections Branch Flatlick Sewer Rehabilitation Project Phase 1 & 2 Sewer Pipes Before and after Lining Mild offset joints and cracks Infiltration Infiltration Deteriorated concrete: Aggregate and reinforcement visible Cured-in-place pipe: Addresses the “before” defects
- 14. Additional Information For additional Information, please call www.fairfaxcounty.gov/publicworks Flatlick Sewer Rehabilitation Project Phase 1 & 2 Capital Facilities/Wastewater Design and Construction Division/Collections Branch Sharon North, M.A., Section Chief, Communications 703-324-8455, TTY 711 Sharon.North@fairfaxcounty.gov or Irene Haske, Communications Specialist 703-324-5821, TTY 711 Irene.Haske@fairfaxcounty.gov