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Retaining Wall Construction Risk Assessment

Retaining Wall Construction Risk Assessment

  • • 100% Compliant with Australian WHS Acts & Regulations
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Retaining Wall Construction Risk Assessment

Product Overview

Identify and control organisational risks associated with Retaining Wall Construction at the planning, design and governance level using this comprehensive management-focused Risk Assessment. This document supports executive Due Diligence, aligns with the WHS Act, and helps protect your business from operational liability and enforcement action.

Risk Categories & Hazards Covered

This document assesses risks and outlines management controls for:

  • Governance, WHS Duties and Legal Compliance: Assessment of PCBU obligations, officer due diligence, consultation duties and the integration of WHS responsibilities into retaining wall construction governance frameworks.
  • Design Management and Engineering Verification: Management of design risk, engineering sign-off, design change control and verification that retaining wall designs are suitable, buildable and safe for the intended life cycle.
  • Geotechnical Risk and Ground Stability Management: Assessment of soil conditions, slope stability, subsidence, surcharge loading and the use of geotechnical investigations to inform safe design and construction methodology.
  • Procurement of Materials, Blocks and Structural Components: Governance of supplier selection, specification compliance, certification of proprietary systems and quality assurance for structural elements, fixings and reinforcement.
  • Contractor, Designer and Engineer Competency Management: Systems for prequalification, licence and registration checks, competency verification and performance monitoring of all parties involved in retaining wall works.
  • Planning and Integration with Adjacent Structures and Services: Management of interfaces with buildings, roads, utilities and existing retaining walls, including service locating, asset protection and coordination with other projects.
  • Excavation, Temporary Works and Shoring Systems Management: Governance of excavation design, temporary support systems, benching and battering strategies, and independent review of high-risk temporary works.
  • Plant, Equipment and Lifting Systems Governance: Selection, inspection and maintenance of earthmoving plant, cranes, lifting gear and compaction equipment, including safe lifting plans for blocks and structural components.
  • Safe Systems of Work, Procedures and Documentation: Development, approval and review of SWMS, work procedures, permits, inspection checklists and record-keeping to demonstrate systematic WHS risk management.
  • Training, Induction and Competency Development: Planning of site-specific inductions, task training, verification of competency and ongoing skills development for workers and supervisors involved in retaining wall construction.
  • Consultation, Communication and Change Management: Protocols for consulting with workers, contractors, designers and clients, including toolbox talks, design review meetings and formal change management processes.
  • Site Access, Public Safety and Traffic Management: Management of access routes, segregation of plant and pedestrians, public interface controls, temporary fencing and traffic management around retaining wall works.
  • Environmental, Drainage and Stormwater Risk Management: Control of erosion, sediment, stormwater flows and drainage behind walls, including long-term performance considerations and integration with environmental approvals.
  • Health Risks, Fatigue and Psychosocial Factors: Assessment of workload, shift patterns, environmental exposure, stress and contractor pressures that may affect decision-making and safe supervision of works.
  • Emergency Preparedness, Wall Failure and Incident Response: Planning for partial or full wall failure, ground movement, service strikes and other emergencies, including escalation pathways and coordination with emergency services.

Who is this for?

This Risk Assessment is designed for Business Owners, Developers, Principal Contractors, Project Managers and Safety Leaders overseeing retaining wall construction projects and seeking to strengthen organisational WHS governance and compliance.

Hazards & Risks Covered

Hazard Risk Description
1. Governance, WHS Duties and Legal Compliance
  • • Failure to identify and discharge PCBU and officer due diligence duties under the WHS Act 2011 for retaining wall construction
  • • Inadequate understanding of obligations under state and territory WHS Regulations, Building Code of Australia and local council requirements for earth retaining structures
  • • Absence of clear WHS objectives, targets and performance indicators specific to excavation and retaining wall projects
  • • Inadequate allocation of resources (time, budget, competent people) for safe design, planning and supervision of retaining wall works
  • • Poor integration of WHS governance into procurement, design, construction and handover processes
  • • Lack of documented WHS roles, responsibilities and accountabilities for key duty holders (PCBU, principal contractor, supervisors, designers, engineers, subcontractors)
2. Design Management and Engineering Verification
  • • Retaining wall or earth retaining structure designed by non‑competent or unqualified personnel
  • • Insufficient geotechnical investigation leading to under‑designed wall and potential collapse or excessive movement
  • • Omission of drainage design, backfill specifications or surcharge load considerations in design documentation
  • • Lack of independent design review and certification for high or complex retaining walls
  • • Design not considering constructability, sequencing, temporary works and access for plant and people
  • • Design changes on site not re‑assessed or certified by a suitably qualified engineer
3. Geotechnical Risk and Ground Stability Management
  • • Unidentified ground conditions such as reactive clays, loose fill, soft soils, voids or uncontrolled fill leading to wall or excavation failure
  • • Inadequate assessment of slope stability, existing retaining structures or adjacent excavations
  • • Failure to manage groundwater, seepage or perched water pressures behind or below the retaining wall
  • • Uncontrolled surcharge loads (stockpiles, vehicles, buildings) near the crest of excavations or wall alignment
  • • Absence of a formal system for monitoring ground movement, cracking or wall deflection during and after construction
4. Procurement of Materials, Blocks and Structural Components
  • • Use of retaining wall blocks, geogrids, reinforcement or drainage materials that do not meet design or manufacturer specifications
  • • Substitution of specified systems (e.g. keystone block retaining wall systems) with cheaper or incompatible products without engineering approval
  • • Inadequate quality control of prefabricated components leading to dimensional errors or material defects
  • • Lack of traceability for structural components and geosynthetic products
  • • Improper storage of blocks, geogrids and drainage materials leading to degradation or damage before installation
5. Contractor, Designer and Engineer Competency Management
  • • Engagement of contractors or designers without demonstrated competency in retaining wall construction or earth retaining structures
  • • Supervisors lacking technical understanding of retaining wall systems, geogrids, drainage and backfill requirements
  • • Inadequate verification of licences, registrations and professional indemnity insurance for engineers and specialised contractors
  • • Insufficient resources for competent supervision during critical construction stages such as founding, reinforcing and backfilling
  • • Reliance on ad‑hoc labour hire without appropriate induction or verification of skills
6. Planning and Integration with Adjacent Structures and Services
  • • Retaining wall alignment conflicting with underground or overhead services, leading to service strikes or compromised footing design
  • • Inadequate assessment of impact on nearby buildings, pavements, fences and existing retaining walls
  • • Lack of coordination with other construction activities resulting in overloading, undermining or damage to newly built walls
  • • Poor planning for access, laydown areas and traffic movements around excavations and wall construction zones
7. Excavation, Temporary Works and Shoring Systems Management
  • • Systemic failure to identify excavations associated with retaining walls as high risk construction work under WHS Regulations
  • • Lack of engineered design for deep cuts, benching, shoring or soil nail systems required for wall construction
  • • Inadequate inspection and maintenance regime for temporary works supporting cuts and adjacent structures
  • • Absence of procedures controlling access to excavation edges for plant, vehicles and pedestrians
  • • Poorly communicated limitations on excavation depth, batter slopes and benching arrangements
8. Plant, Equipment and Lifting Systems Governance
  • • Selection of inappropriate plant for excavation, lifting and placing heavy wall blocks or reinforcing elements
  • • Inadequate plant maintenance systems leading to mechanical failure near excavations and retaining walls
  • • Absence of engineered lifting plans for handling large keystone blocks, panels or precast units
  • • Poor control of plant movements near excavation edges, leading to ground collapse or wall instability
  • • Lack of operator competency verification and high‑risk work licences where required
9. Safe Systems of Work, Procedures and Documentation
  • • Absence of project‑specific safe work procedures for retaining wall and earth retaining structure activities
  • • Over‑reliance on generic SWMS that do not reflect site‑specific geotechnical, design or access constraints
  • • Failure to integrate design assumptions and limitations into operational procedures used by supervisors and crews
  • • Poor control and communication of revisions to procedures and work instructions
  • • Insufficient documentation of critical hold points, inspections and sign‑offs for retaining wall stages
10. Training, Induction and Competency Development
  • • Workers and supervisors not trained in the specific risks associated with retaining wall and excavation projects
  • • Inadequate induction covering ground instability, wall collapse, plant‑person interface and emergency response
  • • No structured competency assessment for key tasks such as block placement, compaction and drainage installation
  • • Limited understanding of manufacturer installation requirements for proprietary keystone block systems
  • • Failure to provide refresher training following incidents, near misses or design changes
11. Consultation, Communication and Change Management
  • • Poor communication of design details, limitations and critical stages between engineers, supervisors and work crews
  • • Lack of formal consultation with workers on practical issues affecting safe retaining wall construction
  • • Uncontrolled changes to methods, sequencing or materials not communicated to all stakeholders
  • • Language, literacy or cultural barriers leading to misunderstanding of critical safety instructions
  • • Inadequate handover communication between shifts or different contractors working on the same wall
12. Site Access, Public Safety and Traffic Management
  • • Unauthorised access by public or non‑essential workers to excavation and retaining wall construction areas
  • • Vehicle and plant interaction with pedestrians near wall alignments and excavation edges
  • • Insufficient separation between public roads, footpaths, neighbouring properties and construction activities
  • • Inadequate lighting, signage and barriers around partially completed walls and open excavations after hours
13. Environmental, Drainage and Stormwater Risk Management
  • • Inadequate management of stormwater leading to erosion, scouring or undermining of retaining wall foundations
  • • Clogging or failure of drainage systems behind walls causing hydrostatic pressure build‑up and potential collapse
  • • Uncontrolled discharge of sediment‑laden water from excavations affecting downstream areas or public infrastructure
  • • Lack of maintenance planning for long‑term performance of subsoil drains, weep holes and surface drainage
14. Health Risks, Fatigue and Psychosocial Factors
  • • Fatigue arising from extended work hours, high physical workload and exposure to weather during excavation and wall construction
  • • Heat stress or cold exposure affecting decision‑making and physical capability in outdoor retaining wall works
  • • Psychosocial stressors including time pressure, conflicting priorities with other trades and community complaints
  • • Manual handling injuries from repetitive handling of smaller blocks, tools and drainage components without adequate task design
15. Emergency Preparedness, Wall Failure and Incident Response
  • • Lack of planning for sudden wall movement, collapse or excavation failure involving workers or the public
  • • Inadequate emergency access for rescue services around excavations and retaining wall sites
  • • Poor communication systems for raising the alarm and coordinating response in remote or dispersed work locations
  • • Absence of scenario‑based emergency drills addressing wall collapse, engulfment or plant rollover near excavations
16. Monitoring, Inspection, Audit and Continuous Improvement
  • • Failure to detect early signs of wall distress, ground movement or drainage problems during and after construction
  • • Inconsistent or informal inspections of critical retaining wall construction stages
  • • Lack of structured WHS performance monitoring for retaining wall projects
  • • Inadequate follow‑up on non‑conformances, incidents, near misses or audit findings

Need to add specific hazards for your workplace?

Don't worry if a specific hazard isn't listed above. Once you purchase, simply log in to your Client Portal and add your own custom hazards at no extra cost. We take care of the hard work—creating the risk ratings and control measures for free—to ensure your document is compliant within minutes.

Legislation & References

This document was researched and developed to align with:

  • Work Health and Safety Act 2011
  • Work Health and Safety Regulations 2017
  • AS/NZS ISO 31000:2018: Risk management — Guidelines
  • Code of Practice: Construction Work: Guidance on managing WHS risks associated with construction activities, including structural and excavation work.
  • Code of Practice: Excavation Work: Requirements for planning, ground stability, shoring and supervision of excavation activities relevant to retaining wall construction.
  • Code of Practice: Managing the Risk of Falls at Workplaces: Controls for working at heights and near edges associated with stepped sites and retaining structures.
  • AS 4678: Earth-retaining structures — Design, construction and performance requirements for structural retaining systems.
  • AS 2159: Piling — Design and installation requirements where piles or ground anchors are used in retaining wall systems.
  • AS/NZS 1170 (Series): Structural design actions — Loadings relevant to retaining wall design, including surcharge and environmental loads.
  • AS 3798: Guidelines on earthworks for commercial and residential developments, including compaction and backfilling adjacent to retaining walls.
  • AS/NZS ISO 45001:2018: Occupational health and safety management systems — Requirements for systematic WHS governance and continual improvement.
Standard Risk Assessment Features (Click to Expand)
  • Comprehensive hazard identification for all activities
  • Risk rating matrix with likelihood and consequence analysis
  • Existing control measures evaluation
  • Residual risk assessment after controls
  • Hierarchy of controls recommendations
  • Action priority rankings
  • Review and monitoring requirements
  • Consultation and communication records
  • Legal compliance references
  • Sign-off and approval sections

$79.5

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