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Deep Excavation (over 1.5m) and Ground Stability Risk Assessment

This risk assessment covers deep excavation over 1.5 metres and the ground-stability issues that can arise during planning, excavation and worker entry.

Activities covered include

  • Plan excavation work and locate underground services
  • Respond to water ingress, weather and changing ground conditions
  • Prepare emergency response and rescue arrangements

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Deep Excavation (over 1.5m) and Ground Stability Risk Assessment
  • 100% Compliant with Australian WHS Acts & Regulations
  • Fully Editable MS Word & PDF Formats Included
  • Pre-filled Content - Ready to Deploy Immediately
  • Customisable - Easily Add Your Logo & Site Details
  • Includes 2 Years of Free Compliance Updates

Product Overview

This risk assessment covers deep excavation over 1.5 metres and the ground-stability issues that can arise during planning, excavation and worker entry. It supports planning and risk management by addressing services, ground conditions, plant, water, atmospheric hazards, inspections and rescue readiness.

Activities & Risks Covered

This assessment addresses activities and risks including:

  • Plan excavation work and locate underground services
  • Assess ground conditions and select an appropriate excavation design
  • Set up exclusion zones, edge protection and site controls
  • Operate excavation plant and manage vehicle interactions
  • Manage excavation progress and worker entry
  • Respond to water ingress, weather and changing ground conditions
  • Identify atmospheric hazards and contaminated ground
  • Manage adjacent structures, traffic and external loads
  • Inspect excavation controls and communicate changed conditions
  • Prepare emergency response and rescue arrangements

Who is this for?

For contractors, workers, supervisors and businesses carrying out deep excavation and ground-stability work.

Activities & Hazards Covered

Activity Potential Hazards
Planning, permits and service locating
  • Striking underground essential services during excavation
  • Excavation method not matched to soil conditions or depth
  • Unidentified adjacent structures, trees, drainage or previous ground disturbance affecting stability
  • Unauthorised excavation starting without current information
Ground assessment and excavation design
  • Ground collapse from unsuitable trench profile or unsupported faces
  • Failure of excavation walls due to poor soil, fissures, vibration or seepage
  • Instability of nearby buildings, pavements or structures
Site set-up, exclusion zones and edge protection
  • People or vehicles entering the excavation area inadvertently
  • Falls into the excavation
  • Members of the public exposed to excavation hazards
  • Plant or materials placed too close to edges causing collapse
Excavation plant and mobile equipment operation
  • Workers struck by excavators, trucks or attachments
  • Ground collapse triggered by plant operating too close to the edge
  • Plant rollover due to unstable ground or hidden voids
  • Collision between plant, workers and other vehicles
Excavation progress and worker entry
  • Workers engulfed or trapped by trench collapse
  • Workers entering unsupported or partially supported sections
  • Slips, trips and falls on uneven ground, spoil or wet surfaces
  • Falling objects or dislodged material striking workers below
Water ingress, weather and changing ground conditions
  • Collapse from rain, seepage, groundwater or flooding
  • Workers trapped by sudden in-rush of water or mud
  • Reduced footing stability and plant bogging near the excavation
  • Controls becoming ineffective after weather changes
Atmospheric hazards and contaminated ground
  • Low oxygen or build-up of harmful gases in deep or poorly ventilated excavation
  • Exposure to contaminated soil, chemicals or vapours
  • Fire or health effects from solvents or fuel vapours
  • Workers not recognising atmospheric danger
Adjacent structures, traffic and external loads
  • Collapse caused by nearby traffic, cranes, stockpiles or building loads
  • Undermining footings, slabs, retaining walls or services
  • Vibration affecting excavation stability
Inspections, supervision and communication
  • Control measures deteriorating without being noticed
  • Workers using outdated information after conditions change
  • Miscommunication between plant operators, workers and supervisors
Emergency response and rescue readiness
  • Delayed rescue following collapse, engulfment or service strike
  • Unplanned entry by rescuers creating additional casualties
  • Poor access for emergency services
  • Inadequate first response to gas, electrical or flooding incident

Need to tailor this risk assessment?

Use the BlueSafe Portal to add site-specific activities, hazards, controls, responsibilities and review details before the assessment is put into use.

Acceptance Guaranteed: If your client or principal requests changes during document review, BlueSafe will help revise the document at no extra cost and support resubmission until it is accepted.

Legislation & References

The template records model guidance used to inform the documented controls. Applicable WHS/OHS laws and adopted Codes vary by state or territory, so confirm the current local requirements when tailoring the assessment:

  • Model guidance: Model Code of Practice: Excavation work — 2.3. Controlling the risks; p. 17.
  • Model guidance: Model Code of Practice: Construction work — 6.2 Workplace specific induction training; p. 41.
  • Model guidance: Model Code of Practice: Managing risks of plant in the workplace — Plant hazard identification — Traffic movements in the workplace; p. 17.
  • Model guidance: Model Code of Practice: Managing the work environment and facilities — 2. The work environment; p. 13.
  • Model guidance: Model Code of Practice: Managing the risk of falls at workplaces — 3.2 Identifying the hazards; p. 16.
  • Model guidance: Model Code of Practice: Work health and safety consultation, cooperation and coordination — 3. What is effective consultation?; p. 13.
  • Model guidance: Model Code of Practice: First aid in the workplace — 3. First aid equipment, facilities and training; p. 12.
  • Model guidance: Model Code of Practice: How to manage work health and safety risks — 3. Step 2 — How to assess risks; p. 15.

Standard Risk Assessment Features (Click to Expand)
  • Activity-specific hazard identification and control measures
  • Initial and residual risk ratings
  • Assigned responsible persons for each activity
  • Risk matrix and assessment classification
  • Review, monitoring and sign-off fields
  • Site-specific customisation before use

Suitable for Industries

Building and ConstructionCivil Construction and EarthworksMining and Resources

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