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Red Oak Creek Relief Interceptor

This project featured the installation of approximately 8,720 linear feet of 27- to 30-inch (700 to 800mm) Superlit FRP gravity sewer pipe. Each section was joined using Full Face® FRP couplings, ensuring a leak-free, corrosion-resistant, and flexible joint system capable of accommodating minor angular deflections. Installation combined open-cut excavation and tunneling, with FRP pipes installed inside steel casings in sensitive areas to minimize surface disruption.

 
 

 
  • Year:  2025
  • Location:  Texas, United States
  • Client:   Trinity River Authority of Texas (TRA)
  • Application:  Wastewater

8,720 ft (2.6 km)

Total Length

27 in (700 mm) & 30 in (800 mm)

Diameter

Superlit CFW FRP pipes

Solution

The Red Oak RO-3 Project involves the construction of approximately 8,720 linear feet (2.6 km) of 27 to 30 in (700 to 800 mm) gravity relief interceptor, replacing an 18 to 21 in (457 to 533 mm) unlined reinforced concrete pipe that had reached the limits of its hydraulic and structural performance. The existing pipe is undersized for the projected wastewater flows.

The new line, built with SUPERLIT fiberglass reinforced polymer (FRP) pipes, provides a durable, corrosion-proof, and hydraulically efficient solution that will sustain long-term performance under aggressive soil and wastewater conditions. Installed adjacent to the existing line, the new interceptor was designed to increase system capacity, reduce maintenance, and ensure uninterrupted service during construction.

Installation was completed through a combination of open-cut excavation and tunneling, where FRP pipes were installed within steel casings to safely cross under existing  properties, utilities and roadways to minimize surface disruption.

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