Underground Utility Surveys
Detection, mapping and clearance verification of underground services (PAS 128 where required) to deliver safe, clash-free excavation and design.
What are Underground Utility Surveys?
Underground Utility Surveys locate and map buried services such as HV/LV power, gas, water and telecoms. Using CAT/Genny and GPR, we reduce strike risk and help designers plan safe, clash-free works.
Why they matter
Unknown services cause accidents, delays and costs. Reliable utility mapping supports method selection, isolation planning, permits to dig and safe excavation.
How we deliver
We follow PAS 128 survey levels where required, trace services, interpret GPR, and integrate findings with records and CAD bases. During construction we verify trench clearances and provide QA documentation.
Typical outputs
Layered CAD utility drawings with confidence levels, annotations, photos and schedules where appropriate.
What we deliver
- PAS 128 methodology (where specified)
- CAT/Genny and GPR detection and tracing
- Trench clearance verification and QA
- Layered CAD utility drawings with annotations
FAQs
Yes — we can work to PAS 128 methodology and provide outputs matching the specified survey levels.
CAT/Genny for conductive services and GPR for non-conductive or deeper utilities, combined with survey control.
Yes — we measure separations and record them for QA to prevent clashes and non-compliance.
Yes — we produce CAD with confidence classes, annotations and integration with topo data.
Yes — we coordinate permits, isolations and safety controls with estate teams.
GPR and inference from records can identify many non-metallic routes; confidence classes are noted.
Accuracy depends on the method (e.g., PAS 128 level) and site conditions; we document methods and confidence.
Yes — we can deliver integrated bases for designers and contractors.
We supply drawings, notes and evidence to support safe digging processes.
We can mobilise at short notice depending on access and safety requirements.