When digging, excavating, or otherwise breaking ground, hitting an underground utility asset isn’t just a small issue, it can cause cascading problems. From safety hazards and fines through to project delays, and reputational damage, a utility strike can quickly spiral into much bigger problems. Understanding what’s really at stake helps project managers, contractors and asset owners make better decisions earlier.
This article explores why data quality is crucial, what kinds of costs arise from utility strikes, how thorough utility surveys help prevent the worst outcomes, and what steps to take to protect both timeline and budget.
Quality of Utility Data and Why It Matters
Before ground is broken, teams usually rely on existing utility drawings, asset registers and service records. But too often, these are outdated or incomplete.
Good quality data means:
- Accuracy: Are the positions, depths, materials of cables/pipes correctly recorded?
- Completeness: Are all underground services shown, including private or less obvious ones?
- Accessible & Up-to-date: Can surveyors, designers and contractors easily access the latest versions, and do they trust them?
When data quality is poor, the risk goes up. In Australia underground utility data is governed by the AS5488 Quality Levels.
Quality Level A – Highest Quality
Utilities are physically located and verified by non-destructive digging – essential for all construction involving utility assets.
Quality Level B – Significant Risk Reduction
Located using proven geophysical techniques such as electromagnetic locating. Expect tolerances of ±300mm horizontally and ±500mm vertically.
Quality Level C – Lower Quality
Based on assumptions or existing data. It can help during early planning but should never be used for excavation.
Quality Level D – Least Accurate
Derived from older plans or BYDA responses – location is indicative only.
Depending on the scope of your work, these data levels are very important. If you are looking to dig a small hole for a tree in your backyard, Quality Level D is probably fine in most circumstances. However, if you are on a construction site performing significant excavation, Quality Level A or B is an absolute necessity.
The Cost of a Utility Strike
Damage to underground electricity, gas, fibre or any other utility can be expensive to fix. Before You Dig Australia’s national assessment estimates the total direct and indirect costs of utility strikes sits at $5 billion per year across the country. These costs come in many forms and are often unpredictable. It includes direct costs such as repairs, but indirect costs such as project delays, contract disputes, and wider social and economic costs.
Some utility strikes can be localised, such as when a construction worker in Brisbane cut an underground power cable, leading to a significant power outage affecting local businesses and residences. The strike resulted in widespread power disruptions for several hours and traffic delays that went on for days. However, sometimes the problem is much larger, for example, when Tasmania was effectively isolated from the rest of the world after a large drill severed a major telecommunications line. The fallout was massive. Flights were delayed, banks and ATMs were shut down, businesses could not use EFTPOS, and homes lost phone and internet service for five hours.
How In-Depth Utility Data Stop Utility Strikes
The earlier and more thorough utility surveys are done, the more they reduce risk. Here’s how an in-depth utility survey helps, and why timing matters.
What an in-depth survey includes
- Active detection using tools like ground penetrating radar and electromagnetic locators rather than just relying on old records.
- Visual verification when required using non-destructive digging (NDD) to confirm the exact location of a utility.
- Precise positioning and depth creating georeferenced data that can be confidently overlaid on designs.
- Clear data visualisation allows easier ongoing maintenance and planning.
Why earlier is better
- Design stage benefits: If hidden or undocumented utilities are found early, designers can account for them in planning, reducing redesign later.
- Budget clarity: Early surveying gives better cost estimates and less contingencies are needed to cover unknowns.
- Reduced delays: Identifying conflicts before work begins helps avoid project delays, rework, and scheduling chaos.
- Safety & compliance: Meeting statutory or regulatory requirements is easier if utility risks are well understood up front.
Conclusion
A utility strike is far more than a broken pipe or a quick repair. It can delay project timelines, endanger workers and the community, and harm company reputation. Real world experience shows that indirect and social costs often dwarf the direct ones.
By investing in quality data early, using in-depth utility surveys, teams can avoid many of the worst outcomes. That means a safer worksite, fewer surprises, better budgeting, and smoother delivery.
If you’re managing a project, consider making a utility survey part of the initial scoping. The up-front cost is small compared to the true cost of an accident.
