Product Overview

Summary: This Excavation Safety Safe Operating Procedure sets out a clear, step-by-step approach to planning, executing and monitoring excavation works in line with Australian WHS requirements. It helps businesses control the significant risks of trench collapse, underground services strikes and mobile plant interactions, while keeping projects on schedule and compliant.

Excavation work is one of the highest-risk activities on Australian construction and civil works sites, with trench collapses, underground service strikes and plant-pedestrian interactions regularly featuring in serious incident statistics. This Excavation Safety Safe Operating Procedure provides a structured, practical framework for managing those risks from concept design through to backfilling and reinstatement. It translates legislative and code of practice requirements into clear actions for supervisors, operators and workers on the ground, ensuring that critical controls such as shoring, benching, exclusion zones and service locating are consistently applied.

The SOP helps businesses move beyond ad-hoc practices by setting a consistent standard for how excavations are planned, authorised, set up, monitored and closed out. It clarifies who is responsible for risk assessments, permits, inspections and emergency arrangements, and provides guidance on working around existing structures, public areas and live services. By implementing this procedure, organisations can reduce the likelihood of cave-ins, service outages, injuries and regulatory enforcement, while demonstrating due diligence under WHS laws and client requirements across Australian construction, infrastructure and maintenance projects.

Key Benefits

• Ensure consistent compliance with Australian WHS legislation and excavation-related Codes of Practice across all worksites.
• Reduce the risk of trench collapse, ground instability and underground service strikes through structured planning and control measures.
• Standardise supervision, permitting and pre-start checks so that critical excavation controls are never missed or left to chance.
• Improve coordination between plant operators, groundworkers and subcontractors to minimise plant–pedestrian interactions and near misses.
• Demonstrate due diligence to regulators, clients and principal contractors through a documented, defensible excavation safety process.

Who is this for?

• Site Supervisors
• Construction Project Managers
• Civil Engineers
• WHS Managers
• Excavator and Plant Operators
• Groundworkers and Labourers
• Utilities Coordinators / Dial Before You Dig Contacts
• Principal Contractors
• Local Government Works Supervisors
• Civil Contractors Business Owners

Hazards Addressed

• Trench collapse and cave-ins leading to engulfment or crush injuries
• Ground instability and loss of support adjacent to structures, roads or services
• Contact with underground utilities (electricity, gas, water, communications, sewer)
• Struck-by incidents involving mobile plant, swinging loads and buckets
• Falls into open excavations by workers or members of the public
• Atmospheric hazards in excavations (oxygen deficiency, toxic or flammable gases)
• Water ingress, flooding and drowning risks in deeper excavations
• Manual handling strains from shoring, trench shields and materials handling
• Noise, vibration and dust exposure from excavation equipment
• Vehicle and traffic interface hazards around roadside and public-area excavations

Included Sections

• 1.0 Purpose and Scope
• 2.0 Definitions and Regulatory Context
• 3.0 Roles and Responsibilities
• 4.0 Pre-Planning and Design Considerations for Excavation Work
• 5.0 Site Assessment and Excavation Risk Assessment
• 6.0 Locating and Protecting Underground Services (Dial Before You Dig and Verification)
• 7.0 Excavation Permits and Authorisation Process
• 8.0 Selection of Excavation Method, Shoring, Benching and Batter Design
• 9.0 Plant, Equipment and Tools Requirements
• 10.0 Personal Protective Equipment (PPE) Requirements
• 11.0 Establishing Exclusion Zones, Barricades and Signage
• 12.0 Traffic and Pedestrian Management Around Excavations
• 13.0 Step-by-Step Excavation Operating Procedure
• 14.0 Working in and Around Existing Structures and Services
• 15.0 Atmospheric Testing and Ventilation for Confined or Deep Excavations
• 16.0 Water Management, Dewatering and Weather Considerations
• 17.0 Inspection, Monitoring and Recording of Excavation Stability
• 18.0 Backfilling, Compaction and Site Reinstatement
• 19.0 Emergency Response and Rescue from Excavations
• 20.0 Training, Competency and Induction Requirements
• 21.0 Documentation, Records and Review of Excavation Activities

Legislation & References

• Work Health and Safety Act 2011 (Cth and relevant state/territory variants)
• Work Health and Safety Regulation 2011 (including provisions for excavation work)
• Safe Work Australia – Code of Practice: Excavation Work
• Safe Work Australia – Code of Practice: Construction Work
• AS 2159: Piling – Design and installation (relevant where excavations interface with foundations and piling)
• AS/NZS 3012: Electrical installations – Construction and demolition sites
• AS 1742: Manual of uniform traffic control devices (for roadside and public-area excavations)
• AS/NZS 1715: Selection, use and maintenance of respiratory protective equipment
• AS/NZS 1801: Occupational protective helmets
• Dial Before You Dig / Before You Dig Australia service requirements and utility owner guidelines