Excavation Risk Assessment Template 2026
OHSA-compliant hazard identification and risk assessment (HIRA) for excavation work. Covers Trench collapse/cave-in, Falling into excavations, Underground service strikes, and more.
Instant Generation
AI creates your complete excavation HIRA in under 2 minutes.
OHSA Compliant
Meets Construction Regulations 2014 requirements for risk assessments.
Risk Matrix Included
Automated risk scoring with likelihood × severity calculations.
Excavation HIRA Categories
Hazard Categories Covered
- Excavation Collapse
- Underground Services
- Plant and Machinery
- Water Hazards
- Access and Egress
Specific Hazards Addressed
- Trench collapse/cave-in
- Falling into excavations
- Underground service strikes
- Flooding and water ingress
- Vehicle and plant accidents
- Hazardous atmospheres
- Manual handling injuries
- Noise and vibration
Risk Matrix Methodology
Our excavation HIRA uses a 5×5 risk matrix combining likelihood and severity to calculate risk scores. The AI automatically applies hierarchy of controls to reduce residual risk.
High Risk (15-25)
Work cannot proceed. Immediate controls required.
Medium Risk (8-14)
Additional controls needed before work starts.
Low Risk (1-7)
Work may proceed with standard precautions.
Key Excavation Risks & Controls
Excavation collapse
Our AI applies hierarchy of controls: elimination, substitution, engineering controls, administrative controls, and PPE.
Damage to underground services
Our AI applies hierarchy of controls: elimination, substitution, engineering controls, administrative controls, and PPE.
Vehicle/pedestrian accidents
Our AI applies hierarchy of controls: elimination, substitution, engineering controls, administrative controls, and PPE.
Flooding and instability
Our AI applies hierarchy of controls: elimination, substitution, engineering controls, administrative controls, and PPE.
Required PPE for Excavation Work
Excavation Risk Assessment Requirements in South Africa
Excavation and earthworks are governed by the OHSA Construction Regulations 2014 (Regulation 13) and to the SANS 10400-B for foundation work. Excavation work is consistently in the top 5 causes of construction fatalities in South Africa, primarily from trench collapses and striking underground services. Government infrastructure tenders for roads (SANRAL), water (DWS), and municipal services always require detailed excavation method statements. Key requirements include: service detection methodology (using GPR, EM locators, and plans), shoring/battering calculations signed by a competent person (or Pr.Eng for >3m deep), dewatering plans, and spoil management. CIDB classes CE or GB apply. Geotechnical reports are typically provided by the client in tender documents, and your method statement must reference and respond to the reported soil conditions. Compaction testing per TMH1 (Technical Methods for Highways) is mandatory for all fill work on road and infrastructure projects.
Key Risk Assessment Focus Areas for Excavation
Focus 1: Trench collapse: the primary excavation fatality risk. Specify soil classification, maximum unshored depth, and engineer-designed shoring for all trenches >1.5m
Focus 2: Striking underground services (electricity, gas, water, fibre): service detection protocol must include physical hand-dig exposure of any detected service
Focus 3: Vehicles and plant operating near excavation edges: specify minimum setback distances (1m for light vehicles, 2m for heavy plant) and edge protection barriers
Focus 4: Persons falling into excavations: barricade all excavations when unattended, provide safe access ladders every 9m for trenches, and ensure adequate lighting for night work
Focus 5: Flooding: specify emergency pump capacity, weather monitoring trigger levels, and evacuation procedure for rapid water rise in excavations
Common Mistakes in Excavation Risk Assessments
Relying only on plans to locate underground services without physical verification — plans are often inaccurate by up to 2m
Entering trenches >1.5m without shoring in place — the most common fatal mistake in SA excavation work. "The soil looks stable" is not a risk assessment
Not specifying compaction layer thickness and testing frequency — achieving overall compaction without layer-by-layer testing does not meet COLTO or TMH1 standards
Failing to address dewatering disposal — pumping turbid water into stormwater drains or watercourses triggers NEMA Water Act offences
Using road base material requirements for pipe bedding — these are different specifications and mixing them up is a common tender error
Key Legislation for Excavation Risk Assessments
| Regulation / Standard | Requirement |
|---|---|
| OHSA Construction Regulations 2014, Reg 13 | Excavations: requires competent person supervision, shoring for >1.5m in unstable ground, barricading, edge protection, safe access, daily inspections, and engineer design for >3m deep. |
| TMH1 (Technical Methods for Highways) | Standard test methods for road materials including compaction testing (Mod AASHTO), California Bearing Ratio (CBR), grading analysis, and Atterberg limits. |
| COLTO Standard Specifications | Committee of Land Transport Officials specifications for roadworks and earthworks. Defines material classes, compaction requirements, and construction tolerances used in all SANRAL tenders. |
| NEMA National Water Act 36 of 1998 | Dewatering discharge and turbid water management near watercourses requires a Water Use Licence or General Authorisation. Construction stormwater management plan required. |
Excavation Risk Assessment FAQ
At what depth must shoring be installed in trenches?
What compaction standard is required for road earthworks?
Do I need a geotechnical report for my tender submission?
What is the service detection standard for excavation?
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