Product Overview

Summary: This Underground Utility Detection Safe Operating Procedure sets out a clear, repeatable method for locating and confirming buried services before any excavation or intrusive ground works commence. It helps Australian businesses prevent utility strikes, protect workers and the public, and demonstrate due diligence under WHS and damage‑prevention obligations.

Underground utility strikes are one of the most costly and dangerous incidents on Australian construction and maintenance sites. Contact with buried electricity, gas, water, sewer, communications or fibre assets can result in electrocution, explosions, major service outages, environmental contamination and significant regulatory scrutiny. This Underground Utility Detection Safe Operating Procedure provides a structured, end‑to‑end process for planning and carrying out utility location activities before any excavation, drilling, piling or penetration work begins.

The SOP guides your team through pre‑work planning (including BYDA enquiries, reviewing utility plans and site history), on‑site verification using appropriate locating technologies (such as electromagnetic locators and ground penetrating radar), and the use of potholing and non‑destructive digging to positively identify asset position and depth. It clearly defines responsibilities between project managers, supervisors, plant operators and specialist locators, and embeds WHS risk management, permit to dig processes, and communication protocols with asset owners. By implementing this procedure, organisations can significantly reduce the likelihood of damaging critical infrastructure, protect workers and the public from serious harm, and provide a defensible record of risk control in line with Australian WHS legislation and industry best practice.

Key Benefits

• Reduce the risk of striking underground electricity, gas, water, sewer and communications services before and during excavation.
• Ensure consistent, documented utility detection practices across all projects and contractors.
• Demonstrate compliance with WHS duties and damage‑prevention expectations from asset owners and regulators.
• Improve coordination between project teams, specialist locators, plant operators and service authorities.
• Minimise costly project delays, unplanned outages, repair costs and reputational damage arising from utility strikes.

Who is this for?

• Civil Construction Supervisors
• Site Managers
• Project Engineers
• Dial Before You Dig (DBYD) / BYDA Coordinators
• Utility Locators
• Surveyors
• Excavator and Plant Operators
• WHS Managers and Advisors
• Facilities and Asset Managers
• Local Government Infrastructure Officers

Hazards Addressed

• Electrocution from contact with underground electrical cables
• Explosion or fire from ruptured gas mains
• Flooding or ground instability from damaged water or sewer mains
• Service outages affecting communications and essential infrastructure
• Struck‑by and entanglement hazards when plant hits unknown services
• Environmental contamination from damaged sewer or fuel lines
• Ground collapse or subsidence due to uncontrolled excavation around assets
• Exposure to biological hazards from ruptured sewer systems

Included Sections

• 1.0 Purpose and Scope
• 2.0 Definitions and Abbreviations (e.g. BYDA, EM Locator, GPR, SUI Classes)
• 3.0 Roles and Responsibilities (PCBU, Project Manager, Supervisor, Locator, Plant Operator)
• 4.0 Applicable Legislation, Standards and Codes of Practice
• 5.0 Pre‑Work Planning and BYDA Enquiries
• 6.0 Review of Utility Plans, Site History and Risk Assessment
• 7.0 Permit to Dig / Ground Disturbance Authorisation Process
• 8.0 Required Competencies, Training and Verification of Competency (VOC)
• 9.0 Required Equipment and Calibration (EM locators, GPR, NDD trucks, hand tools)
• 10.0 Site Preparation, Service Mark‑Up and Exclusion Zones
• 11.0 Step‑by‑Step Underground Utility Detection Procedure
• 12.0 Potholing and Non‑Destructive Digging (NDD) Verification Requirements
• 13.0 Control Measures for High‑Risk Services (HV cables, high‑pressure gas, trunk mains)
• 14.0 Communication with Asset Owners and Permit Conditions
• 15.0 Integration with Excavation and Trenching Activities
• 16.0 Hazard Identification, Risk Assessment and Control (SWMS/JSEA)
• 17.0 Personal Protective Equipment (PPE) Requirements
• 18.0 Emergency Response Procedures for Utility Strikes
• 19.0 Environmental Protection and Waste Management (spoil, contaminated water)
• 20.0 Documentation, Records, Drawings and As‑Constructed Updates
• 21.0 Monitoring, Inspection, Auditing and Continuous Improvement
• 22.0 Review and Revision History

Legislation & References

• Work Health and Safety Act 2011 (Cth) and equivalent state and territory WHS Acts
• Work Health and Safety Regulations 2011 (Cth) and equivalent state and territory regulations
• Safe Work Australia – Excavation Work Code of Practice
• Safe Work Australia – Construction Work Code of Practice
• AS/NZS 5488:2013 – Classification of subsurface utility information (SUI)
• AS 1742.3 – Manual of uniform traffic control devices – Traffic control for works on roads (for works in or near road reserves)
• Dial Before You Dig / Before You Dig Australia (BYDA) – Duty of Care Guidelines and Best Practice for Damage Prevention
• AS/NZS 3000:2018 – Electrical installations (Wiring Rules) – relevant to underground electrical services
• AS 2885 series – Pipelines – Gas and liquid petroleum (for high‑pressure gas transmission corridors)