Survey · Service
GPR Underground Utility Survey
Ground-penetrating radar survey that locates and maps underground utilities before any excavation — reducing damage risk, speeding approvals and producing accurate as-built corridors.
A note on terminology: the correct engineering term for this service is GPR — Ground Penetrating Radar. It is widely searched online as “GPRS survey”, which is why that phrase also appears on this site. It should not be confused with GPRS (General Packet Radio Service), the cellular data technology.
Overview
See what's underground before anyone touches it
Our GPR crews scan the ground with high-resolution radar to detect, locate and map every buried utility long before the first cut is made — a safe, dispute-free dig and a precise digital record of the corridor.
- Utility detection, depth profiling & mapping
- 14 owned GPR survey systems
- Accurate digital as-built records
- Damage-prevention intelligence
What's Included
Everything delivered in-house
Utility Detection
Locate buried cables, pipes, ducts and unknown obstructions.
Utility Detection
Locate buried cables, pipes, ducts and unknown obstructions.
Depth Profiling
Accurate depth and alignment so crews dig with confidence.
Depth Profiling
Accurate depth and alignment so crews dig with confidence.
Digital As-Built
Clean, GIS-ready, shareable digital corridor records.
Digital As-Built
Clean, GIS-ready, shareable digital corridor records.
Damage Prevention
Risk mapping that avoids strikes, penalties and delays.
Damage Prevention
Risk mapping that avoids strikes, penalties and delays.
Why Mezux
Why operators trust our GPR survey
A survey is only as good as the crew reading it. Mezux runs 14 company-owned GPR systems operated by our own engineers — not rented kit and freelance hands — so interpretation stays consistent from the field to the final drawing.
We have mapped over 1.5 lakh kilometres of subsurface: power, water, drainage and legacy telecom, profiled by depth and turned into GIS-ready, field-verified as-built records. That documentation is what lets an HDD crew drill with confidence and a RoW file stand up to scrutiny.
Because the same team surveys, drills and documents, a clash found underground is a phone call — not a dispute between vendors. Explore GPR survey by city or request a survey scope.
Technical Specification
GPR Survey — Equipment & Output
| Method | Ground Penetrating Radar (GPR), supported by electromagnetic cable/pipe locating where targets are metallic |
|---|---|
| Owned survey systems | 14 company-owned GPR units |
| Antenna frequency | Typically 250–400 MHz for utility-depth work; lower frequency (100–250 MHz) where deeper penetration is required |
| Typical investigation depth | Commonly 1–3 m in favourable ground; reduced in high-clay or saturated soils |
| Detectable targets | OFC, power, water, gas, drainage and legacy telecom — subject to material, size, depth and soil conditions |
| Scan pattern | Planned grid / corridor traverses with cross-lines at utility crossings |
| Verification | Trial pits / vacuum excavation at critical crossings where the client or authority requires physical confirmation |
| Deliverables | Marked-up route drawing, depth-annotated utility plan, CAD (DWG/DXF) and GIS-ready output (SHP/KML) |
| Standards reference | Survey planning and reporting aligned to PAS 128-style quality levels; exact level agreed per project |
Figures are indicative of standard capability and are confirmed per project. Achievable values depend on ground conditions, utility density, site access and authority requirements, and are fixed in the approved method statement. GPR does not detect every buried asset in every ground condition; complementary locating methods and physical verification are used where accuracy is critical.
Quality & Assurance
QA/QC and documentation
Work is executed under our ISO 9001:2015 quality, ISO 14001:2015 environmental and ISO 45001:2018 occupational health & safety management systems. Each project runs to an Inspection and Test Plan (ITP) agreed with the client, with hold and witness points at survey sign-off, bore setout, duct proving, splicing and final testing. Site checklists, test records and as-built drawings are compiled into a handover pack for the client and, where applicable, the permitting authority.
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