DSIIDC GPR Survey for Delhi's Industrial Estates

What is a DSIIDC utility survey used for?

A DSIIDC utility survey maps the services under industrial estate roads and plots before road upgrades, drain rebuilding, new feeders or plot construction. Industrial ground holds heavier cables, effluent lines and more abandoned services than a housing colony, and the survey is planned around them.

The Delhi State Industrial and Infrastructure Development Corporation is a Delhi Government undertaking. It developed the Bawana Industrial Area to resettle units moved out of non-conforming areas, maintains other industrial estates and builds construction projects for government departments. Our jobs here are estate-wide road and drain packages, or building work on open or partly built land.

Okhla, Naraina, Mayapuri and Wazirpur hold decades of layered services. The newer Bawana and Narela belt was planned on a grid, but plots have since added connections in every direction.

What lies under an industrial estate road?

More than drawings show. Underground utilities here include HT and LT feeders, effluent and sewer lines to treatment plants, water lines and storm drains. Gas pipes to units, fibre ducts and dead cables from old connections add to the mix.

• Power: 11 kV feeders to large units and LT cables to small sheds, often several running side by side.
• Effluent: lines from units to common treatment plants, which may be corroded, shallow or patched.
• Gas: steel or polyethylene pipes to process units; we mark them with extra care and wider clearance.
• Abandoned services: dead cables and pipes from closed or relocated units, which still block a trench.
• Fill: rubble, slag and concrete debris under old roads that make GPR images noisy.

That clutter rules out a single tool. Locator tracing on metallic pipes and cables comes first, GPR second, and every chamber we can open is logged. During ground penetrating radar survey work, radar waves reflect off buried objects, a geophysical effect that slag and rubble can blur. An experienced surveyor reads the GPR data for that reason. More on producing a clean drawing is on our utility mapping details page.

Why does an estate road upgrade go wrong without a survey?

The new drain or carriageway lands on services nobody recorded, and the contractor loses days to repairs, shutdowns and disputes with units that lose power or gas.

A common pattern: an estate road is widened with a covered drain on one side. The tender drawing shows a water line and an HT feeder. On site, the trench meets three feeders, two effluent lines and a run of dead cables, and each one stops the excavator. A day of scanning would have shown all of them. That is what a tender survey gives bidders: the real number of shifts and protections.

Road cutting permission works the same way. With existing utility lines drawn and your alignment clear of them, the application is easier to defend and the crew knows where to hand dig.

How do you work around running factories?

Around their hours and gates. We scan the road in daylight when traffic allows, enter plots only with the owner's consent, and avoid blocking loading bays during shift changes.

Truck movement is the main constraint. We work one side of the road at a time with cones and a flagman, and move aside when a trailer turns. Plot owners want to see the marks before anyone digs near their feeder, so we walk their maintenance staff through the paint on the spot. For equipment and soil notes, see GPR survey in Delhi at a glance. Estates on the city edge often connect to sites outside Delhi; here are the GPR survey in Delhi NCR details.

Industrial estate survey at a glance

Colony roads next to an estate are often municipal; compare MCD utility survey rates and scope if your package crosses the boundary.

Why map the estate as a corridor?

Estate roads are narrow strips carrying many services. A corridor drawing records the whole strip, with kerb offsets and depths, instead of isolated crossings.

Each service is drawn with its offset from a fixed line, so it can be found again after resurfacing. Larger estates are split into numbered strips, one sheet each, in the order of the road names or block letters. A new plot connection is added to its strip and reissued, which keeps the utility maps current at little cost. For a comparison in a different setting, the NDMC utility survey process step by step shows the same sequence.

Plot corners and effluent gradients

DSIIDC estate roads are lined with factory plots, and many disputes start with a line that clips a plot corner. We fix the main junctions by DGPS and pick up boundary pillars, gates and manhole lids with a total station. Each traced feeder or effluent pipe then shows against the plot it serves. Effluent and storm lines also get chamber levels, as a common effluent network relies on gradient to reach the treatment plant. The result is one estate base plan the next contractor can reuse on any construction site. More on DGPS coverage for Delhi estates and picking up plot pillars by total station.

What does a DSIIDC utility survey cost?

₹24 per metre for a standard GPR survey and ₹32 per metre with an L-section, with a minimum order of ₹50,000 in Delhi NCR, plus GST.

• An 18 km estate road network at the standard rate: 18,000 × ₹24 = ₹4,32,000 plus GST.
• A 120 km multi-estate programme with L-sections: ₹38,40,000 at list rate, less 25% for an order above 100 km, giving ₹28,80,000 plus GST.
• Above 500 km the whole-order discount is 40%, and above 1,000 km it is 50%.

There is no minimum length. Trial pits, night shifts and plot-level work inside running units are quoted as separate lines.

Field work on DSIIDC estates falls to Mezux Touch crews on radars the company owns, never sub-let, and each buried feeder is identified and mapped by them. Some of it has come on orders placed by DSIIDC directly; the rest is for plot owners, road builders and utility firms inside Bawana, Narela and the older industrial areas. For DSIIDC utility mapping, price your Delhi job by sending the estate name, the road list and what is being built.

Frequently asked questions

Can you scan inside a factory plot?

Yes, with the owner's consent. We cover the plot frontage and the route of any new connection.

Do you identify effluent lines separately from sewers?

Where chambers can be opened and flow seen, yes; otherwise the line is marked as a drainage line of unconfirmed use.

How do you handle live HT feeders?

Utility detection starts with a locator from the road surface. We mark a safe offset and recommend hand digging inside it.

Can you check a water main crossing on an estate road?

Yes, with an L-section; see: Delhi Jal Board Pipeline Crossings for the method.

Do you also cover estates in central and south Delhi?

Yes; here are the details of survey coverage in New Delhi.

Will dead cables appear on the drawing?

Yes, as unconfirmed or abandoned lines, because they still affect excavation.

Written by Saniya Parveen · Technically reviewed by Rahul Rai · Updated 8 November 2026