Subsurface Utility Investigation (NSW)

Going beyond the traditional above ground surveys, Beveridge Williams offers the complete package with quality utility survey and locating in New South Wales.

We have a team of highly qualified and experienced Dial Before You Dig Accredited Utility Locators and Surveyors who are experts at not only investigating and marking underground utilities, but in translating utility information into engineering-grade survey data.

Removing the Risk

With the assets hidden underground, specific and tailored research and resources are necessary to complete a utility survey, as there can be serious consequences if something is missed.

Utility Survey and Drafting is unique, and our team's knowledge of locating methodologies, tolerances, site constraints, and their overall understanding of utilities are essential for risk minimisation and achieving quality outcomes.



Beveridge Williams has a dedicated team of professional and fully-qualified utility locators who are all Dial Before You Dig Certified.
The team utilises the latest and leading equipment, ensuring accurate locating for each project:

Electromagnetic Locating:

Our team uses a range of electromagnetic and high-frequency induction devices and complementary technology to identify, locate and mark underground services such as metallic water mains, electrical and communications infrastructure.


Ground Penetrating Radar (GPR):

GPR is a geophysical, non-intrusive method of surveying that uses radar pulses to image the subsurface to investigate subsurface anomalies.

It's predominately used in Utility Investigation for identifying non-conductive material such as Poly or Nylon gas lines, brute and uPVC water mains, empty conduits and Drainage infrastructure.

The team can also provide reports on other subsurface features/anomalies, including:

  • Underground Storage Tanks (UST)
  • Subsurface Voiding
  • Concrete Substructures
  • Grave Investigation


The Beveridge Williams team offers the full reach of the survey portfolio with high quality in-house Utility Surveys.

We deliver Comprehensive Utility Deliverables in line with AS – 5488 2019 that will cater to all requirements, including:

  • Georeferenced Aerial Survey plans (if required)
  • 12d/DWG CAD models
  • BIM Modelling
  • Field reports including Pothole/Trench, Pit and Drainage Interactive PDFs
  • SUI Data Spreadsheets


Non-destructive excavation uses high pressure water and vacuum to safely expose and pothole underground utilities, without damaging utilities or their coatings. It’s key to safely identifying and then obtaining the highest possible Quality Level (QL-A) per AS 5488-2019.


The team utilises proven technologies and methods, including Push Rod and Tractor Cameras, to efficiently assess the condition of stormwater drainage, sewerage systems and other pipe infrastructure.

CCTV inspection is a critical service for councils and pipe asset managers as it is the only way to ascertain the true condition of the multitude of Drainage Infrastructures that run under cities and suburbs.

The team can also undertake full Drainage Investigations, Modelling and Reporting in pipe sizes ranging from standard 150mm to 300mm pipes, extending to pipes 2m in diameter.


Our surveyors and drafters are skilled in using the latest CAD software, including 12d for survey reduction and design, AutoCAD, Revit, Trimble Business Centre and Cyclone for drafting/modelling, plus CompNet for complex survey control networks.

All surveyors are equipped with the latest technology including:

  • MALA Locator Core GPR (if required)
  • RadioDetection RD 8200 EM Locators
  • Trimble and Leica Robotic Total Stations
  • Trimble and Leica 3D Laser Scanners
  • RTK and Static GNSS solutions
  • Digital Levels
  • UAV Drone - capable of producing high resolution video and orthorectified images

Talk to us about your Subsurface Utility Investigation needs

Our Subsurface Utility Investigation service is available across NSW.
For more information please contact Manager Subsurface Utilities Investigation, Paul Wallis, on 0431 458 878 or at

Let’s make the most of our collective wisdom. Get in touch today.