When it comes to civil engineering and power infrastructure, one of the most critical challenges during excavation and cable laying is avoiding existing underground services. Striking a water main, gas pipe or live electrical cable doesn’t just cause delays, it can be dangerous, costly and disruptive to entire communities.
At KNTC, we take a proactive, safety-first approach to underground works. Here’s how we minimise the risks and protect vital services during excavation and cable installation projects.
1. Comprehensive utility mapping and surveys
Before the first shovel hits the ground, we gather as much data as possible. This starts with reviewing statutory utility records to identify known services. But as these records aren’t always complete or up to date, we also carry out advanced utility detection surveys, using techniques like:
- Ground Penetrating Radar (GPR)
- Electromagnetic location (EML)
- CCTV drainage surveys
These tools help us build a detailed and accurate picture of what lies beneath the surface, and where.
2. Trial holes and safe digging practices
Where critical services are suspected or confirmed, we conduct trial holes (sometimes called exploratory digs) to physically expose and verify the location and depth of utilities. This is particularly important before deep excavation or where records are unclear.
During excavation, we always follow HSG47 guidance from the Health and Safety Executive (HSE), which includes using insulated tools, digging by hand near known services, and constant on-site monitoring.
3. Marking and communication
Clear, visible marking of services and regular communication between ground teams and supervisors are essential. At KNTC, we use colour-coded spray paint, temporary markers, and detailed site plans to ensure everyone is aware of existing service routes and high risk areas.
Toolbox talks and safety briefings keep everyone on the same page, especially when services are close together or run at unusual depths.
4. Technology that reduces risk
We’re always investing in modern plant, technology and training to improve safety. This includes vacuum excavation for delicate digs around sensitive services, and cable avoidance tools (CAT and Genny) that help detect live electricity cables and telecoms lines before and during work.
5. Working with utility providers
Finally, we maintain strong working relationships with local utility providers, enabling quicker response times and smoother coordination when we need to liaise on complex service diversions or protection measures.
Need a trusted partner for HV or LV installation, trenching or cable pulling?
Talk to the experts at KNTC today.
