GPR survey & underground utility mapping in Dubai & the UAE

What does a utility survey map show?

The utility plan pictured above is a real Dervoss deliverable: located services drawn as a geo-referenced DWG with depths and confidence levels, plus the on-site markings that let the excavator start the same day. Utility record drawings in the UAE, where they exist at all, routinely show services in the wrong place or miss them entirely. A survey replaces that uncertainty with measured positions.

GPR and electromagnetic: why we use both

GPR reads reflections from anything buried (plastic pipes, ducts, voids, chambers) but loses depth in wet, conductive ground. Electromagnetic locating traces the signal along metallic services and live cables regardless of soil, but can’t see non-metallic pipes. Locating services reliably in UAE conditions (irrigation-soaked verges, district cooling corridors, dense free-zone plots) means running both and reconciling the results. That’s also why our maps state a confidence level per service instead of pretending everything underground is equally certain.

What does a utility survey involve?

We start from whatever exists (utility record drawings, NOC plans, previous surveys), then sweep the work area on a grid with our Proceq GS9000 GPR (GX2 antenna array) and trace metallic services and live cables electromagnetically. Located services are marked on the ground as we go, colour-coded by type, so the crew can see the picture forming during the survey, not a week later. Depths are logged per detection point. Back at the desk the findings become the geo-referenced DWG utility map and the clearance report, typically within days, faster for urgent clearances.

For most sites, the survey is one visit. For long corridors or phased excavations we survey ahead of the dig front, so clearance never becomes the critical path.

GPR surveys in Dubai, Abu Dhabi and Sharjah

In Dubai, the networks a GPR survey has to find are mostly the same ones: DEWA power cables and water mains, telecom ducts (e& and du), district cooling pipes, drainage and irrigation lines. Most of them run under verges, pavements and access roads, which is exactly where new connections, boundary walls and landscaping get dug. Utility NOCs from the network owners are often a condition of the excavation permit, and a marked and mapped survey is the evidence that goes with them. Dervoss carries out GPR surveys across Dubai, Abu Dhabi, Sharjah and the Northern Emirates, with same-day slots in Dubai when a team is available.

Combine it with a topographic survey

If the site also needs a topographic survey, scope both together. One visit, one control network: the located services are drawn on the same plan as the levels and features, so the designer gets a single coordinated base drawing instead of two surveys that have to be reconciled.

Why survey before you excavate?

Trenching near roads and buildings, piling and deep foundations, landscaping works over shallow services, and any excavation where the permit or NOC expects clearance: these are the daily cases. A strike costs far more than the survey: repair, delay, claims and the investigation that follows.

GPR survey, utility survey, utility mapping: one job, several names

Clients ask for a GPR survey, an underground utility survey, utility detection or utility mapping, and in practice they are the same job with different names: find what is buried, mark it on the ground, map it in a drawing. Dervoss provides all of them as one visit. The on-site detection finds and marks the services on site the same day; the survey and mapping deliverables document them as a geo-referenced DWG and PDF with depths. If you are not sure which term your permit or consultant means, send the wording and we will confirm the scope. Typical Dubai clearance: one visit, markings on site immediately, map and report within days.