Sanitary Sewer Rehab Begins in Mount Vernon District
Fairfax County Wastewater Collection Division has contracted Am Liner East, Inc. to rehabilitate the sanitary sewer gravity lines and manholes in the area of Colonial Avenue in Mount Vernon District. The project scope includes the trenchless rehabilitation of approximately 4,189 ft. of 36 inch diameter and 1,572 ft. of 42 inch diameter sanitary sewer pipes using the cured in place pipe (CIPP) method. Additionally, approximately 14 manholes will be rehabilitated as part of the project. Temporary bypass pumps and above ground bypass piping are being installed to maintain uninterrupted sanitary sewer service until the project is completed.
The rehabilitation will eliminate the possibility of pipe collapse, sanitary sewer overflows (SSO) and inflow/infiltration into the sanitary sewer system. The process increases reliability of the system and reduces possible health hazards.
Work will occur approximately 900 feet north of the intersection of Old Mount Vernon Road and Mount Vernon Memorial Highway, in Colonial Avenue. Please see project map. The sewer bypass will be placed above ground but buried at road and driveway crossings. Some traffic detours may be required.
A cured-in-place pipe (CIPP) is one of several trenchless (with minimal disruption) rehabilitation methods used to repair existing pipelines. CIPP is a jointless, seamless, pipe within a pipe with the capability to rehabilitate pipes, increasing their useful life by up to 50 years. As one of the most widely used rehabilitation methods, CIPP is the primary rehabilitation method deployed by Wastewater Collection Division on existing sanitary sewer lines.
This capital improvement project is funded through the Fairfax County Integrated Sewer Fund. The contract amount is $2,859,000. The project is currently scheduled to be completed by the end of August 2017.
- Please see the FAQs for additional information on the project.
As of April 14, 2017:
- All work related to rehabilitation of the existing sewer system has been completed.
- On April 17, 2017, the contractor will start to clean and dismantle the sewer bypass system. This work may take 2 to 3 weeks.
- The sewer bypass system runs through some backyards, each backyard will be restored once the temporary system has been removed.
- VDOT is scheduled to repave Surrey Court, Surrey Drive and Colonial Avenue starting in June 2017 (VDOT’s latest schedule).
As of Feb. 24, 2017:
- Approximately a total of 3,450 feet out of 5,760 feet of pipeline has been rehabilitated.
- The pipeline rehabilitation work during the week of Feb. 27, 2017, will be at the end of Colonial Avenue in the park area.
- The project is currently on schedule.
As of Dec. 9, 2016:
- The contactor successfully completed the installation of additional storage structures for the bypass pumping system.
- The contractor will work on the preparing the piping of the bypass pumping system to conduct a system stress test by the end of Dec., weather permitting. Once the bypass pumping system passes the stress test, the contractor will start performing the rehabilitation of the pipes and manholes.
As of Nov. 23, 2016:
- The contractor is currently working on installation of storage structures for the bypass system at Surrey Court. Barring unforeseen complications, this work will be completed the week of Nov. 28, 2016.
- The contractor will work on additional improvements to the bypass pumping system and is targeting a stress test during the last week of Dec.
As of Nov. 4, 2016:
- The contractor will resume work during the week of Nov. 7, 2016.
- The contractor will start work at Surrey Court to make required modifications to the sewer bypass system, this task is scheduled to be completed by the end of December. As part of this task, the bypass system will be stress tested upon completion of the modification work.
- Assuming the new bypass system is successfully tested, the contractor will start the rehabilitation on the sewer pipes and manholes during the first week of Jan. 2017. This task is currently scheduled to be completed in May of 2017.
- Site restoration and landscaping will is scheduled to start in June of 2017 and end in Aug. 2017.
- The timeline stated for the tasks above is assuming limited interruption and all tasks being successfully completed on time.
- A letter describing the current project schedule was hand delivered to residents within close proximity of the project on Nov. 4, 2016.
As of Aug. 31, 2016:
- The bypass pumping system was stress tested on July, 25, 2016. To alleviate sanitary sewer overflow (SSO) risks with this system, the county staff and engineering consultants are working on a plan to install additional temporary storage at Surrey Court’s common area.
- On Aug. 23, 2016, the project team met with the Surrey-at-the-Potomac HOA to request permission to use the HOA’s common required for the bypass pumping system on Surrey Court.
- County staff is reviewing and finalizing the draft agreement from Surrey-at-the-Potomac HOA.
- Once the agreement is finalized, the contractor, engineering consultant and Wastewater Collection Division (WCD) will proceed with the process required to complete this work. This additional work is currently estimated to take approximately 2 months, barring unforeseen delays.
- Once the contractor completes this work, the bypass system will be stress tested to insure the system is working as designed and to reduce risks of SSO.
- The revised project schedule will be posted once this additional work has been completed.
- The contractor is working on fixing the sidewalk on Old Mt. Vernon Hwy, across from the school. They will insure that it is ADA compliant and will provide handrails. WCD is working with the contractor to attempt to complete this work prior to the start of school on Sept. 6, 2016.
- Once the sidewalk work is completed, the contractor will make adjustments by Old Mill Road to mitigate odors.
As of Oct. 7, 2016:
- The material for the additional storage at Surrey Court was ordered during the week of Sept. 26th. The lead time for the arrival of the material is approximately 6 to 8 weeks.
- Until the material is delivered and construction resumes, county staff will monitor the site on a weekly basis.
Fairfax County - Wastewater Collection Division
Shwan Fatah - Project Manager - 703-250-2003, TTY 711
Bob Estadt - Safety Coordinator - 703-250-2003, TTY 711
Jonathan Okafor - Projects and Assets Branch Chief - 703-250-2003, TTY 711
During non-business hours, please contact Fairfax County's Trouble Response Center (TRC) at 703-323-1211 or 703-239-8498, TTY 711, to report emergencies.