Underground Utility Survey in Bengaluru

Updated: 23 October 2026

What is an underground utility survey in Bengaluru?

An underground utility survey in Bengaluru is a field investigation that finds what is already buried along a route or across a site, so new work can avoid it. Ground penetrating radar (GPR) reads the radar signal reflected from pipes, cables, ducts and chambers, whether metal or plastic. An electromagnetic cable locator then follows metallic utilities, such as a live underground cable or a traceable telecom line, along their length.

Your team normally receives three outputs:

• surface paint or pegs showing each service and its rough depth;
• a signed report listing each find and any length the radar could not read;
• optional L-section or CAD/GIS drawings, priced separately.

The city page for GPR survey in Bengaluru covers our service offer; this guide is about planning the work well.

Why survey before digging under Bengaluru roads?

Very few streets in the city hold services from only one owner. Power cables belong to BESCOM, the power distribution company, and water supply and sewer lines to BWSSB. Roads and storm drains fall under the city's civic body, while Namma Metro corridors, built by BMRCL, have brought their own diversions and new utility alignments. Arterial roads also carry dense bundles of telecom ducts laid by different operators at different times.

Each owner keeps its own records, and many older lines were never drawn accurately. Hitting a high-voltage cable or a large water main can injure workers, cut supply to a neighbourhood and halt the job for days; measured utility detection removes that guesswork.

Mezux Touch is not affiliated with BESCOM, BWSSB, BMRCL or the civic body; asking them for permits or records stays with the project owner.

What types of survey are ordered for Bengaluru projects?

Route survey for cables, pipes and ducts

Continuous radar lines along the alignment, cross-lines at intervals and at every chamber, plus EM tracing wherever a conductive line can be followed. This is the usual order for new OFC, HT/LT cable and water pipe routes; our OFC route survey page explains the telecom version.

L-section survey

The scan is extended with a plotted depth line for each service found, charged at ₹32 per metre, so designers can fix the level of a new line or the entry and exit points of a bore.

Junctions, campuses and supporting tasks

Junctions, flyover approaches and metro-side stretches get a tighter grid, often ahead of HDD; tech parks and apartment sites are gridded before foundations. Cable fault locating is a separate assignment, and boreholes or pits can be added on request.

Which survey terms should a Bengaluru buyer understand?

• Detection – the radar or locator registered something. Identification – we can say what it probably is. A good report keeps the two apart.
• Penetration depth – how far down the radar picture stays readable on a given length of road. Signal attenuation (the radar wave losing strength in the soil) sets it, so it is recorded section by section rather than promised in advance.
• EM locating – tracing a metal line by the field it carries or by a signal applied to it. Plastic pipes need radar instead.

How do granite, laterite and the rains affect results?

Parts of Bengaluru sit on hard granite close to the surface, while other areas have reddish laterite soils. Where rock is shallow, services tend to be laid in shallow cuts or in made-up fill, and the boundary between fill and rock can itself show strongly on the radar image. Laterite and clay-rich fill behave differently again, because their dielectric properties (how the ground slows and stores the radar energy) shift once they take on water.

Moisture content is the main enemy of radar reach. Wet clay soaks up the signal; dry, sandy material lets it travel further, and a lower antenna frequency trades fine detail for extra depth. Monsoon work still goes ahead, though reach falls, flooded stretches may wait and fresh backfill muddles the image. We quote no single depth figure for the city; each report section records the reach obtained there.

What should a dependable survey deliver?

1. Checkable coverage – exact stretches scanned, by chainage or landmark.
2. Every service listed – type where identifiable, position against the route and approximate depth at measured points.
3. Honest limits – blocked lanes, wet patches and unresolved lengths, plus a price basis naming every extra.

For drawing sets, our CAD/GIS utility mapping service turns findings into layers, quoted on its own.

How should a Bengaluru survey be planned and budgeted?

Send the route file (KML or drawing), its length and the laying method – open trench, micro-trench or HDD – with metro stretches, big junctions and any owner records marked.

Our crews and 58 GPR systems mobilise from Faridabad, so the visit is planned as one mobilisation covering as much route as possible; mobilisation is quoted separately. Pricing follows the rate card:

Past the 100 km mark the whole order drops by 25%; cross 500 km and the cut grows to 40%; go beyond 1,000 km and every metre is charged at half. After-hours shifts, traffic marshalling and permits are billed apart. Slabs and worked figures sit on our rate card page.

How do you keep utility records useful after the survey?

Road paint fades within days, so file the report with the as-built drawings of whatever you install, note any service your excavation exposed with its measured depth, and pass any CAD/GIS layers to the asset owner too. Re-scan if the street has been dug again since the survey date. Projects in other state capitals follow the same habits; see our state capitals GPR survey hub and the Bengaluru location page.