BharatNet Route Survey and GPR for BSNL Village Fibre Routes

What is a BharatNet route survey?

A BharatNet route survey is a GPR and cable-locator scan along the planned fibre path from a block to its gram panchayats. It records every buried service and obstruction on that path with depth and chainage, so the laying crew can trench or drill without damaging village pipes or the existing network. Ground penetrating radar (GPR) suits this survey method well. The antenna sends radar pulses into the verge, and each pipe, duct or culvert sends back a reflection that the engineer reads in real time.

Rural roads look empty. They are not. In recent years many have gained new water lines, drains and road widening. Much of that work was never drawn on any map a fibre contractor can obtain.

How did BharatNet reach this stage?

The programme began in 2011 as the National Optical Fibre Network and was later renamed BharatNet. Bharat Broadband Network Limited was set up in 2012 to run it, and in 2022 BBNL was merged into BSNL. In August 2023 the Union Cabinet approved an amended BharatNet programme to upgrade and extend the network. Funding now comes through Digital Bharat Nidhi, the successor to the Universal Service Obligation Fund under the Telecommunications Act, 2023.

For field teams, this means two kinds of work. New routes are still being laid to unconnected panchayats, and existing routes are being upgraded, with a ring layout so that one cut does not isolate a village. Both need a clear picture of the ground. Upgrading also means finding the old optic fibre cable, which is rarely where the drawing says it is.

What lies under a village road today?

Far more than when the first fibre went in. These are the services we run into most often on rural fibre routes:

• Jal Jeevan Mission pipes. The mission, launched in 2019 to give rural homes tap water connections, has put HDPE and DI pipes along a great many village roads, often at shallow depth.
• Earlier telecom cable. BSNL copper and fibre from past decades, plus the first phase of BharatNet fibre.
• Culverts and drains. Pipe culverts under village roads and lined drains beside them, which force the route deeper or around.
• Irrigation lines. Underground pipes from tube wells crossing the road to fields.
• LT power cables. Less common in villages than overhead lines, but found near substations and in larger settlements.

Canal and minor distributary crossings deserve separate attention. They often need an HDD shot well below the bed, and the irrigation department's conditions apply.

How do we run the survey across a block?

Section by section, panchayat by panchayat, with the crossing list sent as each section closes. A block-level package can run to a few hundred kilometres, so we plan crews by cluster, not by straight line. Each day's section is scanned with GPR cross-lines at intervals and in full at junctions, culverts and village entrances; live metallic services are traced with a cable locator.

Where the plan is to lay new fibre in the old trench, we first trace the existing cable so the new duct can run beside it without cutting it. Our OFC route GPR survey details page sets out the scanning pattern and deliverables. For the wider telecom picture, see telecom operator projects across fibre and tower networks.

What slows rural survey work, and how do we keep pace?

Weather, crops and access, far more than the scanning itself. In the monsoon, waterlogged roadsides raise electrical conductivity, cut the radar's reach and make some verges impossible to walk. We schedule low-lying sections for the dry months where the timeline allows, and scan raised road sections first when it does not.

Harvest and sowing seasons bring tractors and trolleys onto narrow village roads, so we start early and keep the crew to one side of the carriageway. Where the fibre runs along a field edge instead of the road, the landowner's goodwill matters. The contractor's liaison team handles that, and we fit our schedule to it.

Distances between panchayats can be long, but rural ground often reads cleanly once the crew is there. Dry alluvial soil in the plains gives good depth. Hard rock in parts of central and southern India and laterite in the east behave differently. We adjust the antenna and line spacing to each of these soil conditions.

Records are the other gap. Panchayat offices and the local water supply department often know roughly where pipes run even when no drawing exists. Our engineers ask before scanning; a five-minute conversation with a pump operator can save an hour of searching.

BharatNet route survey at a glance

Before any excavation, the asset owners in the area should be told. Our article on Call Before u Dig is the detailed guide to how that alert system works in India.

What does a BharatNet-scale survey cost?

The standard rate is ₹24 per metre and the L-section rate ₹32 per metre, plus GST, with whole-order discounts that make block and state packages much cheaper per kilometre.

• Above 100 km: 25% off the whole order.
• Above 500 km: 40% off.
• Above 1,000 km: 50% off.
• Minimum order outside Delhi NCR: ₹1,00,000.

An 80 km block package, standard scan, comes to 80,000 × ₹24 = ₹19,20,000 plus GST. A 1,200 km multi-district package earns the 50% slab, so the rate becomes ₹12 per metre and the order totals ₹1,44,00,000 plus GST. You can read about GPR survey rates in full on the price list.

Who do we work for on BharatNet routes?

For BSNL and Bharat Broadband Network Limited, and for the implementing contractors and project consultants who lay and upgrade the network. Both organisations have given us direct work orders, and contractor packages make up the rest. Company names on this page are used only to describe the type of work; all trademarks belong to their owners.

Rural packages need crews who can stay with a block for weeks. Ours are company staff based in the districts we serve, working with company-owned GPR systems. A block opens at once, or a business day later at most, and the team that starts it finishes it. Send the block list and route KMZ, or ask a survey engineer to plan the crew count for your timeline.

Frequently asked questions

Can GPR find the first-phase BharatNet fibre?

It finds the HDPE duct as a buried object in most soils, and a locator can trace it if a tracer wire or metallic element is present. Doubtful spots are confirmed by a small trial pit.

Do you work in remote districts?

Yes, across India. An engineer based in the region opens the block inside one business day and stays with it for the length of the package.

How do you handle canal crossings?

We scan both banks and the approach, and give the depth of any services near the bore path. Where drilling follows, there are HDD route survey details on our service page.

Is the slab discount on each block or the whole order?

On the whole order. If several blocks are awarded together, the total length sets the slab.

Do you supply GIS data?

Yes, as shapefile or KMZ alongside the CAD drawing, so the data collection feeds the state's underground utility mapping.

What if the road has been widened since the design?

We survey the road as it is now, with a fresh GPR survey, and note where the alignment no longer fits.

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