Utility Surveys

Utility Surveying (PAS 128 Compliant)

Geomatics UK Ltd delivers PAS 128 compliant underground utility surveys, providing accurate and reliable data to support design, construction and asset management projects. Our surveys help reduce excavation risk, prevent costly utility strikes, and give clients confidence in their ground data before work begins.

What We Do

We locate and map underground services including:

– Electricity cables
– Gas pipelines
– Water mains
– Telecommunications
– Drainage and sewer networks

Using advanced detection technologies and precise survey control, all data is accurately referenced to the UK National Grid (OSGB36) and Ordnance Datum for seamless integration into CAD, BIM and design workflows.

PAS 128 Survey Levels

We undertake surveys to all PAS 128 quality levels, including:

QL-D – Utility records search
QL-C – Site reconnaissance and validation
QL-B – Geophysical detection surveys
QL-A – Verification using trial holes or vacuum excavation

Our team advises on the most suitable survey level based on project requirements, risk and budget.

Technology & Deliverables

We combine multiple survey techniques to maximise detection confidence, including:

– Electromagnetic Locators (EML)
– Ground Penetrating Radar (GPR)
– GPS/GNSS and Total Stations
– Laser Scanning and Mobile Mapping

Deliverables can include:

– 2D & 3D AutoCAD drawings
– BIM/Revit models
– PAS 128 utility plans
– Topographical overlays
– Survey reports and digital datasets

Why Choose Geomatics UK Ltd?

– PAS 128 compliant workflows
– Experienced utility detection specialists
– Integrated topographical and utility surveys
– Accurate OS Grid referenced data
– Clear, practical outputs for engineers and contractors

We don’t just locate utilities — we provide confidence in your underground infrastructure data.

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Case Study – Gateshead Highway Utility Survey

Geomatics UK Ltd completed a comprehensive PAS 128 utility survey along a live section of the Gateshead Highway to support planned infrastructure works.

The Challenge

The project involved surveying a congested underground environment within a live highway setting, requiring strict traffic management and careful coordination.

Our Approach

Using a combination of EML, GPR, visual inspections and topographical survey control, we delivered a high-confidence Quality Level B (QL-B) survey tied to OS National Grid and Ordnance Datum.

Results

The survey successfully identified extensive electric, telecoms, water and drainage networks, including redundant services and complex service corridors. Detailed outputs included:

– PAS 128 utility mapping
– Depth and invert level data
– Chamber schedules
– Identification of inaccessible or blocked assets

Outcome

The completed survey enabled:

– Safer excavation planning
– Reduced risk of utility strikes
– Improved design coordination
– Fully compliant PAS 128 documentation

This project demonstrates our ability to safely deliver accurate, high-density utility surveys in complex live environments.