Striking a buried utility during excavation in Dubai isn't just expensive — it can be dangerous and can shut down a project for weeks while repairs and investigations take place. A proper utility mapping survey before any digging begins is one of the cheapest insurance policies on a construction project.
What is Utility Mapping?
Utility mapping combines existing record drawings with physical ground detection methods to locate and map buried services before excavation. The two primary detection technologies are:
- Ground Penetrating Radar (GPR) — sends radar pulses into the ground and reads reflections to detect pipes, cables and voids, regardless of material
- Electromagnetic / Radio Detection — detects live electrical cables and metallic pipes by tracing their electromagnetic signature
The PAS 128 Standard
PAS 128 is the internationally recognised specification for underground utility detection, verification and mapping. It defines quality levels from desktop study (Quality Level D) through to detailed verification by trial holes (Quality Level A). Fortress Surveying delivers utility surveys to the quality level required for your project, balancing cost against the risk profile of the works.
| Quality Level | Method | Use Case |
|---|---|---|
| QL-D | Desktop record review only | Initial feasibility studies |
| QL-C | Site reconnaissance + records | Preliminary design |
| QL-B | GPR + radio detection survey | Detailed design, most projects |
| QL-A | Detection + trial hole verification | High-risk excavation near live services |
What's Included in a Utility Mapping Report
- Georeferenced CAD plan showing all detected utilities
- Depth estimates for each detected service
- Service type identification (electrical, water, telecom, drainage) where possible
- Cross-reference against DEWA, Etisalat and RTA record drawings
Cost of Utility Mapping in Dubai
Pricing depends on site area and utility density. Contact us with your site details for a fixed-price quote within 2 hours.
Excavating in Dubai? Map Your Utilities First
GPR and radio detection survey to PAS 128 standard. Get a fixed-price quote within 2 hours.
Frequently Asked Questions
How deep can GPR detect utilities?
Typically up to 3–5 metres depending on soil conditions — sandy Dubai soils generally allow good radar penetration, though high moisture or dense clay layers can reduce effective depth.
Can GPR detect plastic pipes?
Yes — unlike radio detection (which only works on metallic or live electrical services), GPR can detect non-metallic pipes including plastic water and drainage lines, as long as there's sufficient contrast with the surrounding soil.
Do I still need utility mapping if I have DEWA record drawings?
Yes. Record drawings are frequently outdated, incomplete, or inaccurate in actual position and depth. Physical detection remains the only reliable confirmation before excavation.