REHABILITATING CORRODED COASTAL RISING MAINS
Lancing Relining Project Managed Access, Communications and Flow Challenges and Assured Success with the VeriCure® CIPP Curing Monitoring System
THE CHALLENGE
Southern Water, in collaboration with Lining Division Ltd., undertook the rehabilitation of deteriorating rising mains alongside the A259 coastal road in Lancing. These mains had experienced extensive corrosion due to the harsh coastal environment and the high salinity of the groundwater, leading to bursts, internal flooding, environmental pollution, and property damage. These incidents, and the emergency responses they
necessitated, inconvenienced residents, businesses, and local authorities. Comprehensive CCTV surveys revealed pervasive corrosion, tuberculation, and infiltration, indicating severe structural degradation and compromised integrity and operational reliability. Meticulous planning was required to minimize further damage to the lines during the preparatory phase. Moreover, the project site presented numerous logistical challenges, including limited space, overhead power cables, and residential driveways.
THE SOLUTION
In collaboration with Southern Water and their tier-onecontractor, Lining Division Ltd. developed a comprehensive rehabilitation plan to restore the pipelines. Fero Force Pressure Pipe 
System trenchless liners,
customized to fit the specifications of the pipelines, were impregnated with high-performance resins to ensure exceptional durability and longevity in corrosive environments. Strategic excavations at access points
along the pipeline route allowed for simultaneous access to both rising mains, enabling precise alignment and installation of the liners while adhering to safety and environmental protocols. The team also carefully managed flow and tidal influences on water levels and groundwater seepage, deploying waste to divert flow during the rehabilitation process.
QUALITY ASSURANCE WITH VERICURE®
The deployment of VeriCure technology represented are volutionary advancement in the rehabilitation process: This cutting-edge curing monitoring system, based on Fibre-Optic Distributed Temperature Sensing (DTS) technology, provided continuous monitoring of the liner’s temperature during curing. By monitoring the temperature at 10cm increments, VeriCure enabled engineers to adjust heat distribution along the liner to compensate for tidal fluctuations, minimizing the risk of incomplete or uneven curing and enhancing the long-term performance of the rehabilitated pipelines.
THE SIGNIFICANCE
Extensive efforts were undertaken to minimize disruptions and maintain effective communication, and an intensive customer liaison ensured prompt resolution of concerns, fostering stakeholder satisfaction and confidence in the project’s success. By leveraging innovative solutions such as VeriCure technology and high-performance trenchless liners, Southern Water and Lining Division Ltd. demonstrated their commitment to ensuring the long-term integrity, functionality, and sustainability of critical infrastructure assets.
THE RESULTS
Despite the many challenges, the project was completed on schedule and within budget, exceeding client expectations. Installation procedures were meticulously planned and executed, with a phased approach that included cleaning, inspection, liner installation, and post-works CCTV surveys. A total of 1608 m of Fero Force Liner were installed, effectively restoring the integrity and functionality of the rising mains. Since completion, the pipelines have remained in continuous service without the need for remedial works.
