Port Utility Mapping for Berths and Container Yards

Why is port utility mapping harder than work inland?

Reclaimed ground, shallow salty groundwater and heavy pavements all weaken radar. The work therefore needs a mix of methods and honest confidence grading. Ground penetrating radar (GPR) works by sending electromagnetic waves into the ground and timing each echo. Seawater and saline fill conduct electricity, so they soak up that signal. Dry inland soil may give a few metres of range; a wet reclaimed yard gives far less.

The ground itself is also uneven in content. Reclaimed land often holds dredged sand, rubble, old pavement and abandoned structures from earlier phases, all of which return echoes that can be mistaken for pipes. We therefore rely on electromagnetic locators for metal lines and live cables, open every accessible chamber, and tune the radar to the ground conditions of each yard.

Groundwater moves with the tide in some areas, so we prefer to scan the most difficult zones at low water and in the dry season when the programme allows.

Berth expansion survey: what do we check behind the quay?

A berth expansion survey covers the strip behind the quay where new crane rails, pavement and services will tie in. It also follows the routes back to substations, pump houses and the main yard. This strip is the most congested ground in the port.

• Crane power: HT cables and cable trenches feeding quay cranes along the berth.
• Shore water and fire mains: supply lines to hydrants and ship water points along the quay edge.
• Drainage: outfalls and interceptors carrying yard run-off to the sea through the quay wall.
• Communication and control: fibre and copper cables for crane control, CCTV, gate and terminal systems.
• Old structures: buried fender foundations, earlier quay walls and tie-backs from previous extensions.

Where the new berth will be piled, we mark a clear zone around each pile cluster. Any buried object inside it is listed with its estimated depth and confidence.

Yard drainage mapping and pipelines

Container and bulk yards move large volumes of storm water, and their drains, culverts and pump lines are often bigger and older than any drawing suggests. Yard drainage mapping traces each drain from inlet to outfall. It records size, invert where accessible and flow direction, and notes any blocked or broken section seen from chambers.

Alongside drainage, ports carry water, sewer and fire lines, and in liquid terminals the product pipelines that matter most. Steel lines are found with locators as well as radar; plastic and concrete pipes depend on radar contrast, since GPR sees metallic and non-metallic objects alike. For the general method, read about underground pipeline detection.

Reefer points, high-mast lighting and yard cables

Container terminals also run a network of power cables to reefer racks and high-mast lights, laid in ducts or trenches between the stacking blocks. When a yard is re-blocked for new equipment, these lines often sit in the wrong place. We trace them block by block and identify each feeder from its pillar or panel, so the electrical team can plan diversions early. Surface lights and pillars are matched to their buried cables, which shows any circuit that does not follow the drawing.

Liquid cargo, tank farms and shipyards

Liquid berths, tank farms and buried pipe runs near jetty approaches need the same care as a refinery. The lines may carry oil, chemicals or gas. The survey is planned with the terminal's safety team, under its permit-to-work rules, and only with equipment that the area classification allows. Our article on SUE Survey in Refineries explains the permit and safety points that apply in the same way here.

Shipyards bring a different mix. Dry docks and slipways are surrounded by heavy welding and power cables, compressed air and gas lines for cutting, cooling water and docking drainage. Many of these were extended over the years without full records. We map them on the yard grid and mark the ones that run under crane tracks and transport routes.

Port survey at a glance

How the main areas of a port are surveyed and reported.

Each line is graded by quality level; for what to check first when reading those grades, see our guide.

Which ports and terminals do we work at?

Our staff are based along both coasts, near major and non-major ports. A terminal job opens at once, or a business day later at most, for whichever contractor, consultant or terminal engages us. Major ports such as Jawaharlal Nehru Port in Navi Mumbai, Deendayal Port at Kandla and Paradip in Odisha are run by port authorities. They operate under the Major Port Authorities Act, 2021. Private ports such as Mundra in Gujarat have their own operators and rules. Port authorities and private port operators have given us direct orders for buried service surveys, alongside the berth and yard contractors who hire us.

Each port has its own entry pass and safety induction process, and we build the time for these into the programme.

Ground conditions vary along the coastline as much as the rules do. West coast ports in Gujarat sit on wide tidal flats and creeks, where much of the yard area is reclaimed. Ports in the Mumbai region combine old, crowded docks with newer reclaimed terminals. On the east coast, monsoon rainfall and cyclone-season flooding make drainage records important. The season and method mix of each GPR survey are set with these conditions in mind.

What drawings does the port receive?

A layered drawing on the port grid, with every service graded by confidence, chambers and outfalls listed, and data ready for the port's GIS. Unknown or doubtful utility lines are kept on a separate layer, never dropped. To see the file structure, see CAD and GIS utility mapping.

Port land changes hands often: a berth goes to one concessionaire, a yard to another, and the authority keeps the roads. The underground utility mapping therefore shows every service that crosses a lease boundary. Those lines are the most likely to be missed when each party assumes the other holds the record.

Rates for port work

Ports are charged on the same card as other GPR work: ₹24 per metre for a standard scan, ₹32 per metre with an L-section, and GST on top. As ports are outside Delhi NCR, the minimum order is ₹1,00,000. Yard grids are converted into scan length in the quote, which keeps a large construction project cost-effective. Whole-order discounts of 25%, 40% and 50% apply above 100 km, 500 km and 1,000 km. For a reliable estimate, send the layout and the zones to be built on and ask our engineers for a written quote. Pass, induction and escort time are listed openly in the quote, not built into the rate.

Frequently asked questions

Does GPR work on reclaimed port land?

It works, but with less depth than inland, because salty, wet fill absorbs the signal. We add locators, chamber inspection and, where needed, trial holes to fill the gaps.

Can you survey a working container yard?

Yes. We scan in the lanes between stacks and in blocks released by the terminal, coordinating with yard planning so equipment moves are not held up.

Can you trace drains to the outfall?

Yes. We detect and map drains through chambers, with radar between them, and record pipe size, flow direction and visible condition.

Do you work near liquid product lines?

Yes, under the terminal's permit system and safety rules. Methods and equipment are agreed with the safety team before the work starts.

Is tide a problem?

In some yards groundwater rises with the tide. Where it affects readings, we schedule the difficult zones for low water.

Do you survey dry docks and slipways?

Yes. Shipyard services around docks and slipways are mapped on the yard grid from the data collected, with special attention to lines under crane tracks.

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