No-Dig Cable Duct Rehabilitation at Energy Plant

10 February 2026

McBreen Environmental was contracted to restore three 40-metre, 225mm diameter cable ducts on a major energy infrastructure project.

The ducts had become unserviceable for housing new high-voltage cables, and traditional excavation was not feasible due to restricted access beneath the plant.

Challenges

Concrete intrusion from ageing piling
Crushed sections within the ducts
Open joints creating potential voids
Excavation was not possible due to plant layout and operational constraints

Outcome:

The successful rehabilitation of the cable ducts allowed the energy plant to proceed with the installation of new high-voltage cables without the need for disruptive excavation works. By using trenchless rehabilitation techniques, the project avoided major civil works within a highly constrained operational environment.

The restored ducts now provide a structurally sound and fully serviceable pathway for critical electrical infrastructure, ensuring long-term reliability and performance. The project demonstrates how no-dig rehabilitation solutions can effectively extend the life of underground assets while maintaining operational continuity within complex industrial facilities.

Our Solution

Results

The project successfully restored full functionality to all three ducts without disruption to plant operations.

By delivering a safe, efficient, and sustainable solution, McBreen Environmental demonstrated the effectiveness of trenchless technology for complex energy infrastructure challenges.

This project highlights our ability to deliver trusted, no-dig duct rehabilitation solutions where traditional excavation is not feasible.

From initial CCTV surveys to CIPP patching and UV lining, our team provides tailored solutions for critical infrastructure projects, ensuring both safety and long-term performance.