Powhatan Interceptor
In the early 1970’s a new pipe line product was introduced in the market for gravity sewer conveyance. This pipe, known as “Flextran” pipe, was made of fiberglass with a thin coating of cement. It is very light weight and was marketed for installation in low lying, wet area (swamps) due to the ease of handling.
This pipe was installed in James City County in the mid 1970’s along Powhatan Creek and Chisel Run swamps. In recent years the JCSA has experienced problems with the Flextran pipe failing in isolated areas. Anticipating that the useful life of the pipe is expiring, the JCSA has scheduled these Flextran interceptors for replacement/rehabilitation over the next five years.
The initial project focused on the 21-inch interceptor sewer that parallels Powhatan Creek between Jamestown Road and a terminus approximately 3,000 feet north of Route 5 (total length was about 9,500 feet). This project included slip-lining the existing 21-inch Flextran pipe with 12- and 16-inch High Density Polyethylene (HDPE) pipe. The reduction in pipe size was possible because of recent improvements upstream in conjunction with Hampton Roads Sanitation (HRSD) to reroute a portion of the former service area flows.
The initial project was completed in June 2008. The next phase is under design for approximately 11,000 feet just north of Route 5 to an area just north of News Road for 18- to 21-inch pipe using a cured in place pipe lining method. Federal stimulus funds were not awarded to JCSA for this Phase II project; therefore, it has been postponed.
Cost
- $1,314,300 (Phase 1) - Complete
- Engineer's Estimate for (Phase II) $1,800,000
Project Schedule
- Under evaluation
Project Team
- JCSA – Danny W. Poe, P.E. Project Manager (757) 253-6810
- URS – Consulting Engineers – Chris Garrett, P.E. Project Engineer (757) 499-4224.