Beyond the BYDA Plan: Managing Subsurface Risk
Expert Service Locating
April 15, 2026
6 min read
BYDA plans show intended placement, not verified position. Here is why on-site locating is the step that turns an indicative corridor into a line you can dig to.
For project managers and civil contractors, the unseen can be the most costly part of a job. A trench that looks routine on paper can become a high stakes problem once excavation begins. Utility strikes affect safety, program timelines and service continuity, so professional locating has shifted from a discretionary safety check to a practical risk management step.
The limitations of BYDA plans
Every professional excavation should start with a Before You Dig Australia (BYDA) enquiry. The dangerous assumption is that those plans are completely accurate. BYDA research points to more than 15,000 utility strikes each year across the country, largely because plans are indicative. They show intended placement, but they may not capture later movement, repairs or undocumented infrastructure changes.
Bridging the information gap
True underground service locating begins where the paper trail ends. It bridges the gap between the intended map and the buried reality, which can significantly reduce the likelihood of strikes, particularly on high risk services such as gas mains or fibre optic infrastructure where indirect impacts are significant. Privately owned services often do not appear on BYDA plans at all, so on-site tracing and marking is what turns an approximate corridor into a marked line your crew can work to.
What a strike actually costs
A single utility strike carries costs well beyond the repair bill. Professional locating helps protect the project bottom line by reducing exposure to:
- Direct costs: emergency repair fees, civil penalties, and damage to heavy excavation equipment.
- Indirect costs: project downtime, which can cost thousands of dollars per hour in idle labour, plus outages that affect the wider community.
- Reputational damage: a high strike frequency can disqualify contractors from higher tier government and commercial tenders.
Protecting more than the budget
Accidental damage to sewage or chemical lines can lead to long term soil contamination and remediation costs that dwarf the original project budget. Radar based methods are also used to identify unmarked archaeological or culturally significant sites without disturbing the ground. Reducing uncertainty early helps limit downtime, rework and unplanned coordination later.
Source: BYDA Economic Assessment of Utility Strikes in Australia Report 2024.
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