Underground Utility Locating Services
The Trusted Choice for 25 Years in Utility Locating Services
Why Customers Choose Dowds Pipe and Cable Locating Services
Over 25 Years of Experience
Advanced Technology Solutions
100% Certified Accredited & Insured
Free No Obligation Quotes
Responsive Technology Solutions
Detailed Comprehensive Reporting
Welcome to Dowd’s Pipe and Cable Locating
Trusted by builders, developers, and civil contractors for over 25 years. Dowd's Pipe and Cable Locating delivers fast, accurate underground utility locating services across Wollongong, Sydney, the Illawarra, the South Coast, and the Southern Highlands. We help you avoid costly utility strikes, keep your site compliant, and stay on schedule.
We are a family-owned and locally operated utility locating business based in Wollongong. Founded by Declan Dowd, our company was built on decades of real-world experience in civil construction, subdivision works, and underground asset installation. That hands-on background means we understand what builders and developers actually need on site, not just what the textbook says.
Today, we provide advanced pipe and cable locating services that keep worksites safe, prevent damage to underground infrastructure, and help our clients stay on schedule and within budget. We work across residential builds, commercial developments, civil infrastructure projects, subdivision works, and council projects throughout Wollongong, Sydney, the Illawarra, the NSW South Coast, and the Southern Highlands.
Digging without accurate knowledge of what lies beneath can lead to costly damage, project shutdowns, or serious injury. That is why our utility locating specialists use the latest ground penetrating radar (GPR), electromagnetic detection, thermal imaging, and CCTV inspection technology to pinpoint underground services before you break ground. Whether it is electrical cables in Campbelltown, water mains beneath a Nowra subdivision, or fibre optic conduits under a Sydney CBD footpath, we locate it safely and accurately.
Who We Work With
Our core clients are builders, developers, and construction industry professionals who need reliable, fast, and accurate utility locating as part of their project workflow. We regularly work with:
- Residential builders and volume home builders planning new builds, knockdown rebuilds, and subdivision works
- Commercial developers and project managers overseeing multi-stage construction projects
- Civil contractors working on road construction, subdivision infrastructure, and council projects
- Plumbers, electricians, and other trades who need to locate existing services before commencing work
- Homeowners planning renovations, extensions, pools, or landscaping that involve excavation
- Councils and government agencies requiring AS 5488 compliant utility mapping
Our Utility Locating Services
We use GPR and electromagnetic detection to locate all types of underground pipework, including water mains, sewer lines, stormwater drains, and gas pipelines. Whether you are excavating for a new residential build in Shellharbour or upgrading infrastructure on a commercial site in Wollongong, we pinpoint pipe locations, depths, and directional paths so your crew can dig with confidence.
Our thermal imaging specialist, Declan, is a certified and accredited Thermographer. Thermal camera imaging detects temperature variations that reveal hidden problems such as water leaks behind walls, electrical faults, insulation gaps, and moisture intrusion. For builders dealing with defect investigations, pre-purchase inspections, or energy efficiency assessments, thermal imaging provides fast, non-invasive answers.
Striking a live electrical cable or telecommunications line during excavation is one of the most dangerous and expensive mistakes on a construction site. Our cable locating service uses electromagnetic induction and radio frequency tracing to identify all buried cables, including power, Telstra, NBN fibre, and communication conduits. We provide you with a clear report showing cable locations, depths, and directional paths before your team breaks ground.
Ground penetrating radar is the most advanced non-invasive method for mapping what lies beneath the surface. GPR detects both metallic and non-metallic utilities, including PVC pipes, concrete conduits, and fibre optic lines that electromagnetic locators cannot find. It is ideal for complex sites where multiple services overlap, for scanning beneath concrete slabs and asphalt, and for identifying unknown or abandoned infrastructure. We use GPR on everything from residential driveways to major civil construction sites across Wollongong and Sydney.
Before you core, drill, or cut into a concrete slab, you need to know what is inside it. Our concrete scanning service uses GPR to detect rebar, post-tension cables, conduits, voids, and other embedded objects without causing any damage to the structure. This is essential for commercial fit-outs, structural modifications, and any construction work that involves penetrating existing concrete.ng identifies embedded objects such as rebar, conduits, post-tension cables and voids using non-destructive ground-penetrating radar to prevent structural damage.
Hidden water leaks beneath concrete slabs, paving, or foundations can cause structural damage and drive up water bills without any visible sign of the problem. We use a combination of GPR, acoustic detection, and thermal imaging to locate leaks accurately without destructive excavation. Once we identify the source, we provide a detailed report so your plumber or contractor knows exactly where to work.
Our CCTV pipe inspection service feeds a high-resolution camera through your pipelines to capture detailed images of blockages, cracks, root intrusion, and structural defects. This is the most reliable way to assess the internal condition of drainage and sewer lines before a property purchase, during a defect investigation, or as part of a stormwater compliance assessment. We provide recorded footage and a written report for your records.
Wollongong's Trusted Utility Locating Specialists
Dowd's Pipe and Cable Locating is a certified underground utility locating service based in Wollongong, NSW. For over 25 years, we have helped builders, developers, and civil contractors locate pipes, cables, and underground services safely and accurately across Wollongong, Sydney, the Illawarra, the South Coast, and the Southern Highlands. We are fully accredited with DBYD, Telstra, NULCA, and Certloc, and we carry $20M public liability insurance. Our AS 5488 compliant reporting gives you the documentation you need to dig safely and meet your legal obligations.
Why Builders and Developers Choose Dowd's
When your project timeline depends on knowing what is underground before you break ground, you need a locator who understands construction. We work with builders, developers, project managers, and civil contractors every day, and we know that on a construction site, delays cost money and utility strikes cost even more.
Here is what sets us apart:
- 25+ years of hands-on experience in underground utility detection, civil construction, and subdivision works across the Illawarra and greater Sydney.
- Same-day and next-day callouts available so your excavation schedule does not stall waiting for a locator.
- AS 5488 compliant reporting with GPS coordinates, colour-coded site markings, and detailed PDF reports you can attach to your construction management plan.
- Fully insured with $20M public liability and professional indemnity coverage. We meet the insurance requirements of Tier 1 and Tier 2 builders.
- Accredited and certified with Dial Before You Dig (DBYD), Telstra, NULCA, Certloc, and JB Hunter Technology.
- Free, no-obligation quotes with transparent pricing. Volume and account rates available for builders running multiple projects.
We hold current industry accreditations, follow strict safety protocols, and maintain up-to-date training to ensure every project meets Australian standards. Our reputation for quality workmanship, integrity, and genuine customer service is what sets us apart — we never cut corners and always prioritise your site’s safety.
How We Help You Meet Your Compliance Obligations
Under the NSW Work Health and Safety Act 2011, principal contractors and persons conducting a business or undertaking (PCBUs) have a legal duty to identify underground services before any excavation work begins. This is not optional. Failing to locate underground utilities before digging can result in SafeWork NSW enforcement action, improvement notices, and significant fines.
Australian Standard AS 5488 (Classification of Subsurface Utility Information) sets the framework for how underground utilities should be identified, verified, and documented. The SafeWork NSW Code of Practice for Excavation Work also requires that all reasonable steps are taken to locate underground services, including obtaining DBYD plans and engaging a professional utility locator where conditions require it.
When you engage Dowd's, you receive documentation that demonstrates you have taken reasonable steps to identify underground services. This protects you, your workers, and your project from the legal and financial consequences of an unplanned utility strike.
Why Underground Utility Locating Services Matter
Digging without proper knowledge of what’s below the surface isn’t just risky — it’s expensive. Striking an electrical conduit or gas main can cause serious injury, disrupt essential services, and create legal or financial liabilities for contractors and property owners.
Across regions like Wollongong, Sydney, and the Southern Highlands, where older infrastructure often intersects with new developments, the risk of utility strikes is particularly high. By investing in professional locating services, you safeguard your project, meet compliance obligations, and avoid costly downtime.
Understanding Underground Utility Locating
Underground utility locating involves detecting, mapping, and marking buried infrastructure before any excavation or construction work begins. This includes identifying:
- Electrical cables
- Gas pipelines
- Telecommunications lines
- Water and sewer mains
- Fibre optic networks
At Dowd’s Pipe and Cable Locating, we use a combination of GPR scanning, electromagnetic tracing, and thermal imaging, to pinpoint these utilities accurately — even in complex or congested areas. We then mark them with colour codes, GPS coordinates, and detailed reports to ensure your team knows exactly what’s beneath the surface before you dig.
In Australia, it’s not just good practice — it’s the law. Contractors must take reasonable steps to locate underground services before excavation, which includes consulting plans, using professional locators, and complying with AS 5488 Subsurface Utility Information standards.
Types of Underground Utilities We Locate
Our work spans a wide range of sites — from residential builds in Nowra to major civil infrastructure projects in Sydney. Using advanced detection equipment, we locate and map:
We trace electrical cables and high-voltage systems using electromagnetic locators, ensuring accurate identification of buried power lines to prevent electrocution and service disruption.
Electrical Cables & Power Infrastructure
Striking a gas line poses serious safety hazards. Our equipment detects buried gas infrastructure with precision, protecting workers and nearby communities.
Gas Pipelines
With fibre and NBN installations expanding across the Illawarra and Southern Highlands, accurate mapping of communications cables helps avoid costly breakages.
Telecommunications & Fibre Networks
We use GPR (Ground Penetrating Radar) to locate water mains, stormwater pipes, and sewer lines — essential for both residential excavation and council works.
Water & Sewer Pipes
The Risks of Not Locating Underground Utilities
Digging without proper knowledge of what is below the surface is not just risky. It is expensive, it is dangerous, and it can shut down your project. Here is what can happen when underground utilities are not properly located before excavation:
- Serious injury or death from contact with live electrical cables or ruptured gas mains
- Project shutdowns and delays while emergency repairs are completed and safety investigations are conducted
- Legal liability and fines for non-compliance with the WHS Act 2011 and AS 5488 requirements
- Repair costs that far exceed the price of professional locating, plus potential liability for third-party damages and service disruptions
In areas like Wollongong and Sydney where older infrastructure frequently intersects with new developments, even a small excavation can uncover complex underground networks. Professional locating is not an optional extra. It is a fundamental part of responsible construction practice.
Benefits of Professional Utility Locating
Working with experienced professionals like our team at Dowd’s delivers a range of benefits:
- Enhanced safety – Prevents accidents and keeps workers and communities safe
- Reduced project costs – Avoids emergency repairs and costly delays
- Legal compliance – Meets AS 5488 and duty-of-care obligations
- Data accuracy – Provides verified mapping for confident project planning
In short, utility locating isn’t an expense — it’s an investment that saves time, money, and lives.
What You Receive After Every Job
We believe professional utility locating should produce professional deliverables. After every job, you receive:
- Colour-coded site markings showing the location, depth, and direction of all detected utilities
- A detailed PDF report with GPS-referenced utility positions and AS 5488 Quality Level classifications
- Photographic documentation of site markings and any exposed utilities
- A clear summary of findings and recommendations for safe excavation
For larger projects, we can also provide CAD-compatible files and GIS data for integration with your project management systems. Talk to us about your specific reporting requirements.
The Importance of Hiring A Utility Service Locator
The dangers of cutting into live power cables are very real and not to be taken lightly. That’s why it’s crucial to determine where the cables are located before beginning any excavation work.
We use innovative technology to establish where electricity cables lie and will provide you with a report of their direction and depth to give to your contractor.
The cost to repair the damage is expensive and it will bring your project to a halt. That can be avoided by hiring us to locate your pipes and cables before breaking ground.
We’ll determine where cables, lines and pipes are, what direction they run, and how deep they are.
This knowledge will allow you to plan your project around this information to minimise or eliminate the risks altogether. If you’d like to speak to a utility locating expert, give us a call on 0434 635 134 today to speak to a member of our friendly staff!
Using State-of-the-Art Technology
Our knowledgeable team will locate a variety of electrical, telecommunication, gas and water lines. We’ll provide you with a report stating the directional path and depths to give to your contractor.
Our innovative equipment also allows us to discover hidden leaks or damage. That could end up saving you time and money because repairmen would know exactly where to work.
For your peace of mind, we’re accredited and certified with Dial Before You Dig (DBYD), Telstra accredited, National Utility Locating Contractors Association and JB Hunter Technology.
To ensure complete accuracy, we combine several industry-leading technologies tailored to the conditions of each site.
GPR uses radar pulses to create a detailed image of what lies beneath the surface. It detects both metallic and non-metallic utilities, including PVC pipes, concrete conduits, and fibre optic lines. GPR is effective through concrete slabs, asphalt, soil, and sand, and is ideal for mapping complex underground networks on congested sites. Our GPR equipment performs accurately in the clay soils, sandstone substrates, and coastal sands common across the Illawarra and South Coast.
Ground Penetrating Radar (GPR)
Electromagnetic (EM) detection uses transmitters and receivers to trace metallic utilities such as power cables, telecommunication lines, and metal pipes. This method delivers high precision for metallic services and is our primary tool for cable locating. We use multi-frequency EM detection to separate individual services in areas where multiple utilities run in close proximity, including Endeavour Energy power lines, Jemena gas mains, and Sydney Water assets.
Electromagnetic Locating
When plans and electronic detection are not enough to confirm exact utility locations, we use vacuum excavation (also known as potholing or non-destructive digging) to safely expose buried services without damage. This non-destructive technique is the final verification step before large-scale excavation and is often required to achieve the highest AS 5488 Quality Level for subsurface utility engineering (SUE) projects.
Vacuum Excavation & Potholing
Step-by-Step Process for Underground Utility Locating
We follow a proven five-step process on every project to ensure accurate, compliant, and safe results.
1. Site Assessment & Records Review
We review DBYD utility plans, liaise with asset owners including Sydney Water, Endeavour Energy, and Jemena, and identify known underground services before arriving on site.
2. Electronic Detection
Using GPR and electromagnetic locators, we scan the area to detect all metallic and non-metallic utilities.
3. Physical Verification
We expose critical utilities using vacuum excavation for visual confirmation where required
4. Marking & Documentation
Utilities are marked on site using standard colour codes and GPS coordinates. We supply detailed site maps and photographic documentation.
5. Final Report & Compliance
We classify utility data according to AS 5488 Quality Levels and deliver a comprehensive PDF report with GPS coordinates, site markings, and recommendations. This documentation is ready to attach to your construction management plan, SWMS, or DA submission.
Cost Guide for Underground Utility Locating Services
The cost of professional utility locating varies depending on project size, terrain, site access, and the complexity of underground infrastructure. Below is a general guide for our service areas:
| Service Type | Typical Cost (excl. GST) | Inclusions |
|---|---|---|
| Residential utility locating | $350 – $550+ | Basic scan using GPR or electromagnetic detection |
| Commercial & civil locating | $700 – $1,500+ | Multi-technology detection, mapping & reporting |
| Large-scale infrastructure locating | $1,500 – $3,000+ | Full AS 5488 compliance, GPS mapping, vacuum excavation |
These prices are indicative and vary based on access, site conditions, and reporting requirements. We are always upfront about costs and happy to provide a tailored quote after a brief discussion about your project. For builders and developers running multiple projects, we offer volume and account pricing.
Case Study: Commercial Project in Sydney
A civil construction company in Sydney contacted us before commencing trenching for a new industrial complex. The site contained decades-old underground infrastructure with limited documentation — a high-risk scenario for excavation work.
Project Overview
We began with a comprehensive GPR and electromagnetic scan, identifying multiple overlapping utilities, including power conduits, fibre optic lines, and stormwater pipes. Due to conflicting data, we performed potholing to physically verify key service locations.
Our Process
Within two days, we delivered a detailed subsurface utility map compliant with AS 5488 standards. This allowed the contractor to modify trench alignments, avoiding three major utilities and saving potential repair and downtime costs.
Outcome
The project proceeded safely, without a single utility strike — a perfect example of how proactive locating prevents expensive setbacks.
Certified Locators You Can Trust
Our team of certified utility locators brings over 25 years of experience in underground service detection across the Illawarra, Southern Highlands, and Sydney. We maintain current certifications with DBYD, Telstra, NULCA, Certloc, and JB Hunter Technology. All our equipment is regularly calibrated and our technicians hold current safety inductions, including Railway Inducted Worker (RIW) certification for rail corridor work.
We carry $20M public liability insurance and professional indemnity coverage. We are happy to provide certificates of currency on request, and we meet the insurance requirements of Tier 1 and Tier 2 builders.
When you choose Dowd's Pipe and Cable Locating, you are working with professionals who take pride in doing the job right. Safely, accurately, and on time.
Safety Protocols We Follow
Safety is at the core of everything we do. From initial site assessment to final reporting, we follow strict procedures that protect workers, clients, and the public.
- All technicians wear full PPE and operate within exclusion zones
- Only calibrated, well-maintained equipment is used on every job
- Ongoing communication with site supervisors ensures all stakeholders are informed of detected utilities and potential risks
- We hold current SafeWork NSW inductions and comply with all WHS Act 2011 requirements
- Our procedures align with the SafeWork NSW Code of Practice for Excavation Work and AS/NZS 4853 for electrical safety near underground assets
By maintaining these standards, we help our clients meet their legal obligations under NSW Work Health and Safety regulations while ensuring the safety and success of every project.
Common Challenges & How We Solve Them
Congested Urban Infrastructure
In areas like Sydney CBD and Wollongong, multiple services overlap in tight corridors. We perform grid-based GPR scans and multi-frequency electromagnetic detection to separate individual utilities with precision, even in highly congested environments.
Non-Metallic Pipes
Plastic water pipes, PVC conduits, and concrete stormwater drains cannot be detected by electromagnetic methods alone. We use sondes, tracer wires, acoustic detection, and GPR scanning to accurately map non-metallic utilities that other locators may miss.
Poor or Missing Records
Older sites often have incomplete or inaccurate DBYD utility plans. We treat every site as if the records are unreliable, combining multiple detection methods and physical verification to build an accurate picture of what is actually underground, not just what the plans say should be there.
Areas We Service
We are based in Wollongong and proudly service a wide area across NSW. Whether you are running a single residential build or managing a multi-site development program, we bring 25+ years of underground locating experience directly to your site.
Wollongong, Illawarra and South Coast
Our home base is the Illawarra region and we extend our services right down the South Coast. We cover Wollongong, Unanderra, Shellharbour, Nowra, the Shoalhaven region, Ulladulla, and all towns in between. We are familiar with the local ground conditions across the Illawarra escarpment, including the sandstone, shale, and coastal sand substrates that affect GPR performance. We work regularly on sites within Wollongong City Council, Shellharbour City Council, and Shoalhaven City Council areas, and we understand the local infrastructure networks managed by Sydney Water and Endeavour Energy.
Sydney Metropolitan Area
We cover the greater Sydney metro area including Sydney CBD and inner suburbs, Penrith and Western Sydney, the Northern Beaches, Campbelltown and Macarthur, and the Western Sydney growth corridors. With major development activity across Western Sydney, including new residential estates and infrastructure projects, accurate utility locating is essential to keep construction programs on track.
Southern Highlands
For projects in the Southern Highlands, we offer utility locating services in Moss Vale, Bowral, Goulburn, and surrounding areas. The elevated terrain and rock substrates in this region require specialist GPR settings, and our experience with local ground conditions ensures accurate results.
Get a Free Quote Today
Professional underground utility locating is not an expense. It is an investment that saves time, money, and lives. Before you dig, contact Dowd's Pipe and Cable Locating for a site assessment and free quote.
Call 0434 635 134 or email accounts@pipeandcable.com.au. We offer same-day and next-day callouts across Wollongong, Sydney, and the NSW South Coast.
For builders and developers running multiple projects, ask about our volume pricing and preferred supplier arrangements. We are here to make underground safety simple, fast, and reliable for every project you run.
Real Customer Reviews
Declan moved things around to fit me in at short notice for an urgent water leak. He located the leak through concrete within minutes. He provides a highly efficient and professional service. I will be using Dowds Pipe and Cable Utility Locating for all of my future work.
Declan came out to scan our concrete slab at our new premises ahead of drilling into the concrete, his findings totally put our mind at ease for the job ahead. Declan is professional, friendly and always a pleasure to deal with. Highly recommended for Utility Services Locating!
Great service and value for money, highly recommended Dowds Pipe and Cable Utility Locating.
Very friendly and helpful utility locating service. Declan took the time explaining things over the phone to me in a very clear, informative, and professional way. Thanks
Utility Locating Services FAQs
What are underground utility locating services?
Underground utility locating services identify hidden pipes, cables and conduits beneath the ground using advanced technologies like Ground Penetrating Radar (GPR) and electromagnetic detection. Dowds Pipe and Cable Locating helps prevent costly damage and ensure excavation safety.
Why is underground utility locating important before digging?
Locating underground services before digging helps avoid striking live utilities such as gas, water or electrical lines. Dowds Pipe and Cable Locating ensures your site is safe and compliant with Australian Standard AS5488.
How accurate are professional utility locating services?
Professional utility locating is highly accurate when done with GPR and EM technology. Dowds Pipe and Cable Locating provides centimetre-level precision and detailed mapping to prevent excavation errors.
What is the difference between utility locating and Dial Before You Dig?
Dial Before You Dig provides utility plans, but those are only indicative. Dowds Pipe and Cable Locating physically verifies and pinpoints exact utility locations on-site using specialist locating equipment.
What technology does Dowds Pipe and Cable Locating use?
Dowds Pipe and Cable Locating uses Ground Penetrating Radar (GPR), electromagnetic induction and radio frequency tracing to locate underground assets without excavation or damage.
Can GPR detect both metallic and non-metallic utilities?
Yes. GPR detects both metallic and non-metallic utilities including PVC, concrete, and fibre optic conduits. It provides a complete picture of what's underground, not just metal objects.
What depth can utility locators detect underground services?
Most GPR systems can detect utilities from surface level to depths of up to 3 metres depending on soil conditions. Dowds Pipe and Cable Locating assesses each site to determine optimal scan depth and clarity.
Can utility locating detect voids or buried structures?
Yes. Advanced radar imaging can identify underground voids, foundations, tanks and other anomalies in addition to pipes and cables, giving a comprehensive subsurface map.
Is underground utility locating required by law in Australia?
While not always mandated, Australian Standard AS5488 recommends locating all underground utilities before excavation. Hiring Dowds Pipe and Cable Locating helps you stay compliant and avoid liability.
What happens if you hit an underground service?
Striking a buried service can cause serious injury, property damage and project delays. Using Dowds Pipe and Cable Locating before digging eliminates this risk through verified on-site mapping.
Does utility locating help meet WHS requirements?
Yes. Conducting underground utility scans supports workplace health and safety obligations under Australian law by minimising excavation hazards.
How much does underground utility locating cost?
The average cost of underground utility locating ranges from $350 to $1,500+ per site depending on area size, depth and access. Dowds Pipe and Cable Locating provides upfront, no-obligation quotes.
What factors affect the cost of a locating job?
Pricing depends on factors like terrain, soil type, site access, and number of utilities to be mapped. Dowds Pipe and Cable Locating offers tailored pricing based on site complexity.
How long does a utility locating job take?
Most residential jobs take 1-2 hours, while commercial sites may require half a day or more. Dowds Pipe and Cable Locating provides same-day reporting and clear utility maps.
Do you provide maps or digital reports after scanning?
Yes. Dowds Pipe and Cable Locating supplies clear digital maps and marked site plans showing all located utilities for future reference and compliance documentation.
What types of properties need utility locating?
Utility locating is essential for construction sites, residential developments, roadworks, landscaping and plumbing projects. Dowds Pipe and Cable Locating works with builders, councils and homeowners alike.
Can you locate utilities under concrete or asphalt?
Yes. Using GPR technology, Dowds Pipe and Cable Locating can scan beneath concrete slabs, driveways and asphalt surfaces without causing any damage.
Do you locate stormwater and sewer pipes?
Absolutely. Dowds Pipe and Cable Locating identifies stormwater, sewer and drainage lines quickly and accurately before any excavation or repair work.
Can you locate telecommunications and electrical cables?
Yes. Our accredited team locates live and decommissioned electrical cables, Telstra lines and fibre optic conduits using EM and GPR equipment.
Why should I hire Dowds Pipe and Cable Locating instead of doing it myself?
Professional locators use certified equipment and training to guarantee accurate, compliant results. Dowds Pipe and Cable Locating prevents costly mistakes that DIY methods can't detect.
Are your technicians accredited or insured?
Yes. All technicians at Dowds Pipe and Cable Locating are fully insured, accredited and trained to industry standards, ensuring professional results and safety compliance.
Do you service residential and commercial clients?
Yes. Dowds Pipe and Cable Locating handles projects of all sizesâ from small backyard jobs to large commercial and infrastructure developments.
How can I book a utility locating service?
You can call Dowds Pipe and Cable Locating on 0434 635 134 to book a service or request a free quote. We respond quickly and can often schedule same-week appointments.
