Underground Service Locating
CERTLOC Certified Underground Service Locating - Call 1300 859 027
Underground Service Locating and Mapping
HCS provides underground service locating specialists for your infrastructure project. Our CERTLOC-accredited and experienced team uses the latest technology and techniques to deliver a complete picture of the underground services on your project. Our technology can identify, confirm and map the underground services present on your project. Our data delivery can provide anything from simply 2D overlay all to way to an augmented reality solution.
It is critical prior to any excavation or penetration work that the exact underground service locations are validated to ensure the safety of this critical infrastructure and the personnel on the ground working closely with these services. Meticulousness care must be taken to avoid service strikes to ensure safety and to avoid substantial financial impacts on your business. Our team is experienced in the locating and protection of these critical underground services. Our underground service locating specialists provide your business with factual information on service locations to ensure a total visualisation of the underground infrastructure on your site.
Underground Service Locating and Utility Mapping
- Preliminary Underground Services identification
- Mapping of Assets in 3D for Information and Design
- Virtual Reality Model Creation for Real-time Site interaction
- Management of Non-Destructive Digging Process
- Borehole clearances for preliminary works
GPR (Ground Penetrating Radar)
- GPR structural investigation of slab on ground footing extents
- Identification of non-metallic services throughout variable ground conditions
- Identification of changes in subsurface geological formation
- Void identification
- Underground storage tank mapping and reporting
Delivery of data is of extreme importance when it comes to GPR as it is now so much more than a recognise and mark process. Raw location data is processed in house and converted into any electronic format that is required.
Heavy Construction Solutions provides a start to finish program for your underground service location needs, from arranging the BYDA (formerly DBYD) information to handover of a comprehensive electronic file and detailed drawings of critical underground infrastructure on your project.
With more than 11 years of experience and 2,500+ sites investigated across Australia, HCS is a CERTLOC Certified Locating Organisation and a member of the National Utility Locating Contractors Association of Australia (NULCA), working to ISO 9001, ISO 45001 and ISO 14001 certified management systems. If your project also requires below-slab investigation, our concrete scanning service works alongside underground service locating to give you a complete picture before you cut, core or excavate. Learn more about HCS or view our full range of site investigation services. If your project is focused specifically on electrical and telecommunications cabling, our dedicated underground cable locating service covers that in more depth.
Download our Underground Service Locating Brochure for more information about our expertise in utility locating and mapping.
Melbourne Ground Conditions and Coverage
A meaningful share of greater Melbourne sits on reactive clay and basalt-derived soils, particularly across the western and northern growth corridors, with variable, clay-rich profiles common closer to the CBD as well. These conditions increase GPR signal attenuation, the radar pulse loses strength faster and reflections get harder to read cleanly, which is exactly why HCS locators combine electromagnetic (EM) locating with GPR and adjust for ground conditions on site, rather than running one pass and calling it complete.
Add in Melbourne’s inner-city density, laneways and heritage precincts with decades of layered services, tram infrastructure with its own conduit and cabling network, and legacy cast-iron assets sitting close to modern poly pipe, and a single BYDA search or a single detection method leaves real gaps.
Metro Melbourne’s utility records are also split across more owners than most project teams expect: electricity distribution alone runs across five separate businesses (CitiPower, Powercor, Jemena, AusNet Services and United Energy depending on where your site sits), with water and sewer records held separately again across Melbourne’s three water retailers. Part of what a BYDA (formerly DBYD) referral does is pull records from the right combination of these owners, but as with any records search, it tells you what’s supposed to be there, not what a physical locate confirms is actually there.
Areas we service: Melbourne CBD, Docklands, Southbank, Fitzroy, Carlton, Richmond, South Yarra, and growth-corridor suburbs including Tarneit, Truganina, Point Cook, Craigieburn, Epping, Pakenham and Cranbourne.
Need something more specific for your Melbourne site? Our Ground Penetrating Radar Melbourne page covers non-conductive pipe and conduit detection, and our Concrete Scanning Melbourne page covers reinforcement and embedded services in slabs.
Why Getting This Right Matters
A missed or misread service isn’t just a delay – a utility strike carries real cost, both financial and to site safety, and Melbourne’s dense, fragmented utility ownership means that risk is higher here than in many other Australian cities. Locating first is the cheaper option every time.
Frequently Asked Questions
What is underground service locating and why is it needed before excavation?
Underground service locating is the process of identifying, tracing and marking buried utilities — electrical cables, gas, water, sewer, stormwater and telecommunications lines — before any digging, drilling or construction work begins. It protects critical infrastructure, keeps site workers safe, and helps avoid the cost and delay of an accidental service strike.
What's the difference between GPR and electromagnetic (EML) locating?
Electromagnetic locating (EML) traces conductive utilities — metal pipes and live electrical or communications cables — by detecting the signal they carry or conduct. Ground Penetrating Radar (GPR) is used for non-conductive assets such as plastic gas or water pipes, empty conduits, and underground voids, by sending radar pulses into the ground and reading the reflections. HCS uses both methods, matched to the site conditions and utility types present.
Do you locate private services as well as public utilities?
Yes. A Dial Before You Dig (DBYD/BYDA) request only returns records for public utility assets — it doesn't cover privately owned infrastructure such as site-specific stormwater, on-property electrical runs, or older undocumented services. HCS's on-site locating identifies both public and private services so you get a complete picture before excavation.
What areas do you service?
HCS provides underground service locating across Melbourne and Victoria, with additional offices in Newcastle, NSW and Brisbane, QLD.
What standard do your locates comply with?
Our locating and reporting follows AS 5488.1:2022, the Australian Standard for Classification of Subsurface Utility Information, which defines the quality levels (QL-A to QL-D) used to record the accuracy and reliability of located utility data.
What do I receive at the end of a locate?
A detailed report and drawings covering the located services, delivered in the format that suits your project — from a simple 2D overlay through to 3D asset mapping.
Are your locators certified?
Yes — HCS's underground service locating teams are CERTLOC-certified (Certified Locating Organisation), Australia's recognised accreditation for subsurface utility locating.
How do I book a locate or get a quote?
Call 1300 859 027 or submit an enquiry through the form below, and the team will confirm scope and scheduling for your site.
Does Melbourne's soil type change how a locate is done?
Yes. Reactive clay and basalt-derived soils, common across Melbourne's west and north, and in variable pockets closer to the CBD, increase GPR signal attenuation, meaning the radar pulse loses strength faster underground. HCS locators account for this on site by adjusting GPR frequency and interpretation to the specific ground conditions, and by leaning more heavily on EM locating where GPR penetration is limited, rather than treating every site the same way.
How long does an underground service locate take?
A single-site locate typically takes a few hours, depending on site size and the number of services expected. HCS confirms scope and timing with you before the job starts.
How accurate is underground service locating?
Accuracy depends on ground conditions, service depth, and material – see the section above on Melbourne ground conditions for detail. HCS reports confidence per asset rather than presenting every result as equally certain.
What’s the difference between a locate and a full site investigation?
An underground service locate confirms what’s physically in the ground using electromagnetic and GPR methods. A full site investigation goes further again, typically combining locating with concrete scanning or structural assessment depending on project risk.
