Restoring Flow and Building Resilience in Littlehampton

Responding with Expertise

To maintain network performance during the repair, CBUL installed a temporary over-pumping system. A 300mm pump and a 6-inch support pump were deployed to divert wastewater from a nearby pumping station, carrying it safely around the damaged section — a stretch of approximately 70 metres. The solution ensured continuous service and avoided potential environmental incidents during works.

The team also implemented flood resilience measures in line with CBUL’s standard protocol. This included installing a second generator and backup pumping systems to ensure operational continuity in the event of extreme weather. “Having redundancy built in is critical,” noted Sam Bartlett, Area Supervisor. “If one pump or generator fails during a storm, we’re covered — and the local community stays protected.”

Trenchless Technology in Action

CBUL opted for a low-disruption, trenchless repair method using specialist pipe bursting. This involved threading a rig through the collapsed pipe, pulling a new pipe through as the old one was fractured outward — reducing the need for open excavations and expediting the restoration. In total, 15–16 metres were replaced using this method.

Downstream, an additional 56 metres of pipeline was rehabilitated using a cured-in-place pipe (CIPP) lining process. This involves threading a fibreglass-like liner into the pipe, inflating it, and curing it in place to form a new, watertight internal surface. This dual approach ensured both immediate repair and long-term resilience.

Overcoming Unexpected Challenges

One unexpected development was the discovery that the original 450mm pipe was made from asbestos cement, not concrete as initially believed. This required additional testing, licensing, and the involvement of a specialist contractor to manage removal in accordance with health and safety regulations. While this discovery introduced some delay, the team adapted swiftly and safely.

The site itself presented logistical challenges due to its location near a live carriageway and a confined work zone. Uncharted utilities — including unknown services and a live water main — were uncovered during excavation, necessitating revised plans and agile problem-solving.

A Model for Resilient Delivery

This project exemplifies CBUL’s commitment to delivering responsive, resilient infrastructure under pressure. By combining trenchless engineering, strong site management, and comprehensive weather preparedness, the team is safeguarding Littlehampton’s sewer network and delivered essential upgrades with minimal disruption.

Any properties which were impacted during the works were restored to a condition equal to or better than their original state, reflecting CBUL’s dedication to care and quality in the communities it serves. The site was also successfully and safely demobilised, including the coordinated removal of all temporary works using cranes due to the confined environment.

As Southern Water continues to modernise its infrastructure under AMP8, projects like this highlight the importance of proactive maintenance, smart delivery, and strong contractor collaboration. It’s not just about fixing the problem — it’s about strengthening the system for whatever comes next.