This project is for the renewal and rehabilitation of 6,500 linear feet of 30-inch to 54-inch critical large diameter sanitary sewer pipe and associated manhole structures located in the Mount Vernon and Springfield Districts of Fairfax County. The renewal method was selected as trenchless rehabilitation using the CIPP method. CIPP is commonly used in similar applications due to its cost-effectiveness, schedule benefits and limited impact to residents and environment.
According to the National Association of Sewer Service Companies (NASSCO), “Hundreds of millions of feet of CIPP are in service throughout the world today, and it is considered the most widely accepted pipeline rehabilitation technology worldwide.” The project will follow all applicable industry standards, including ASTM F126, Standard Practice for rehabilitation of Existing Pipeline and Conduits by the Inversion and Curing of a Resin-Impregnated Tube as well as safety standards set by the Occupational Safety and Health Administration (OSHA).
The project is in design phase.
The rehabilitation of the Pohick interceptor will:
Proactively renew the asset for the next 50 years
Prevent potential costly emergency repairs
Reduce risks to public health and the environment
Enhance the quality of life for Fairfax County Residents
Provide residents with safe, reliable utility infrastructure
Anticipated End Date
What to Expect
In the current design phase, residents and trail goers might see Fairfax County Staff and their representative contractors completing non-invasive survey of the surrounding trail and trees, or completing site walks.
During the construction phase, some trail access may be limited or rerouted. Notifications for this will updated on the website as well as shared on the Fairfax County Park Authority page.
Project Cost and Funding Source
The engineer’s preliminary opinion of the cost for this project is $14 million and it is being fully funded through sewer service charges from existing customers and availability charges, which are one-time fees for the initial connection to the system. No tax dollars are funding these improvements.