Excavator Use — Plumbing Trenches SWMS
Excavator use for plumbing involves operating mini-excavators and excavators to dig trenches for water supply, sewer, stormwater and gas pipe installation. This is high-risk construction work when the
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Excavator use for plumbing involves operating mini-excavators and excavators to dig trenches for water supply, sewer, stormwater and gas pipe installation. This is high-risk construction work when the excavator is operating near an open trench with workers, or when trenches exceed 1.5 metres depth. The primary risks are mechanical plant interaction with workers in and near the trench, underground service strike, and trench collapse caused by excavator-induced vibration or overloading of trench edges.
This activity constitutes high-risk construction work (HRCW) under Schedule 1 of the WHS Regulation 2025 (NSW). Section 299 of the Regulation requires that a SWMS be prepared before this work commences, be readily accessible at the workplace while the work is being carried out, and be given to the Principal Contractor if one has been appointed for the project. The PCBU directing the work bears a non-delegable duty under Section 19 of the WHS Act 2011 (NSW) to ensure, so far as is reasonably practicable, the health and safety of workers. This SWMS satisfies the documentation component of that duty by systematically identifying hazards, assessing risks, and specifying controls in hierarchy-of-control order. It is authored by a Certified Industrial Hygienist (CIH, MAIOH) against the current regulatory baseline, including the 34 Codes of Practice that become legally binding under Section 26A from 1 July 2026.
Hazards identified
9 hazards covered, sorted by priority.
Fatal — crushing This hazard requires specific controls documented in the SWMS hazard register with both inherent and residual risk ratings.
Fatal — explosion, electrocution
Fatal — burial of workers in trench
Fatal — operator crushing This hazard requires specific controls documented in the SWMS hazard register with both inherent and residual risk ratings.
Fatal — electrocution This hazard requires specific controls documented in the SWMS hazard register with both inherent and residual risk ratings.
Fatal — struck by This hazard requires specific controls documented in the SWMS hazard register with both inherent and residual risk ratings.
Noise-induced hearing loss This hazard requires specific controls documented in the SWMS hazard register with both inherent and residual risk ratings.
Respiratory irritation This hazard requires specific controls documented in the SWMS hazard register with both inherent and residual risk ratings.
Fatigue, loss of concentration, errors
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Dial Before You Dig (DBYD) and potholing before machine excavation
- 2Exclusion zone — no workers within excavator swing radius while operating
- 3Spotter when workers need to be near operating excavator
- 4Excavator minimum setback from trench edge per soil type (1 metre for firm soil, 2 metres for soft)
- 5Overhead power line identification and safe approach distances per AS/NZS 4576
- 6Pre-start inspection of excavator daily (hydraulics, tracks, bucket pins, seatbelt, ROPS)
- 7Operator holds current Verification of Competency (VOC) or High Risk Work Licence
- 8Barricading and traffic management around excavation zone
- 9Hearing protection for workers near operating excavator
- 10Maximum operating hours — 10 hours per shift with regular breaks (psychosocial control)
- 11Clear hand signals or radio communication between operator and ground crew (psychosocial control)
- 12All workers must hold a valid White Card (General Construction Induction Training, CPCCWHS1001) before entering any construction workplace in Australia.
- 13Conduct a daily pre-start toolbox talk covering the day's work scope, identified hazards, required PPE, emergency procedures, and any changes since the previous shift. Record attendance and topics in the SWMS consultation section.
- 14PPE baseline for all workers: safety eyewear compliant with AS/NZS 1337.1, Class I or Class II safety footwear with protective toecap per AS/NZS 2210.3, high-visibility clothing where required by site rules, and task-specific RPE, hearing protection, and gloves as identified in the hazard register.
- 15Display the emergency plan at the work area showing first aid kit location, emergency contacts (000, site emergency number, nearest hospital with address), evacuation routes, and assembly point. Review with all workers at pre-start.
- 16Consult workers on WHS matters affecting them per Section 47 of the WHS Act 2011 (NSW). Record the consultation — who was consulted, what issues were raised, what was decided — in the SWMS consultation section. If an HSR has been elected, obtain their acknowledgement.
Applicable Codes of Practice
This Code becomes legally binding under Section 26A of the WHS Act from 1 July 2026. PCBUs must either comply with this Code or demonstrate that their alternative approach achieves an equivalent or higher standard of health and safety. SafeWork NSW inspectors can issue improvement notices specifically for non-compliance.
This Code becomes legally binding under Section 26A of the WHS Act from 1 July 2026. PCBUs must either comply with this Code or demonstrate that their alternative approach achieves an equivalent or higher standard of health and safety. SafeWork NSW inspectors can issue improvement notices specifically for non-compliance.
This Code becomes legally binding under Section 26A of the WHS Act from 1 July 2026. PCBUs must either comply with this Code or demonstrate that their alternative approach achieves an equivalent or higher standard of health and safety. SafeWork NSW inspectors can issue improvement notices specifically for non-compliance.
The foundational Code for all construction SWMS. Covers HRCW categorisation, SWMS preparation requirements, principal contractor duties, and general construction safety. Becomes legally binding under Section 26A from 1 July 2026.
The universal risk management Code applicable to all workplaces. Establishes the risk management framework (identify, assess, control, review) that underpins every SWMS. Legally binding from 1 July 2026.
Applies to the manual handling components of this activity. Covers risk factors (repetitive movement, sustained posture, force, vibration) and control strategies.
High-Risk Construction Work triggered
Excavator Use — Plumbing Trenches involves work that meets the definition of HRCW Category 14 — work on or near a trench or shaft — under Schedule 1 of the WHS Regulation 2025 (NSW). The specific task elements that trigger this category include on or near an open trench or excavation with mechanical plant.
This activity triggers an HRCW category under Schedule 1 of the WHS Regulation 2025. Section 299 of the Regulation imposes the following obligations on the PCBU: the SWMS must be prepared before the high-risk construction work commences; it must be kept readily accessible at the workplace while the work is carried out; it must be reviewed and revised as necessary to ensure it remains current; and it must be given to the Principal Contractor (if appointed) before the work commences. Under Section 300, a PCBU who fails to prepare a SWMS for HRCW, or who allows HRCW to proceed without a current SWMS, commits an offence. The maximum penalty for a body corporate is 50 penalty units ($36,025 in NSW) per offence, and for an individual 25 penalty units ($18,012.50). These are regulatory penalties — they apply in addition to any prosecution under the WHS Act for a Category 1, 2, or 3 offence if an incident occurs. Category 2 offences (failure to comply with a health and safety duty that exposes a person to a risk of death or serious injury) carry a maximum penalty of $1,500,000 for a body corporate and $300,000 and/or 5 years imprisonment for an individual. From 1 July 2026, Section 26A of the WHS Act further requires that PCBUs comply with all applicable Codes of Practice — this SWMS already cites the relevant Codes.
Who this is for
- →Licensed plumbers performing excavator use — plumbing trenches on construction sites across NSW and other Australian jurisdictions.
- →Apprentices and trainees in the plumbing trade working under the direct supervision of a qualified tradesperson, using this SWMS as part of their competency development.
- →Subcontractors engaged by a Principal Contractor who require a documented SWMS for excavator use — plumbing trenches before commencing work on a managed construction site.
- →Self-employed tradespeople operating as a PCBU who need to demonstrate compliance with WHS Act s.19 primary duty of care for their own work activities.
- →WHS managers, site supervisors, and safety coordinators reviewing subcontractor SWMS documentation during pre-start and ongoing compliance checks.
What you receive
- ✓Editable Microsoft Word document (.docx) fully compatible with Microsoft Word 2016 and newer, Google Docs, and LibreOffice Writer.
- ✓Title page with editable fields for PCBU name, ABN, site address, project name, principal contractor details, and document revision date.
- ✓Signed approval block with signature lines for PCBU representative, Principal Contractor (if applicable), and nominated site supervisor.
- ✓Hazard register containing 9 hazards specific to excavator use — plumbing trenches — each with a documented consequence, inherent risk rating (using a 5x5 likelihood-consequence matrix), hierarchy-of-control measures, and residual risk rating after controls are applied.
- ✓Control measures listed in hierarchy-of-control order (elimination, substitution, isolation, engineering, administrative, PPE) with cross-references to the specific WHS Regulation section, Code of Practice, or Australian Standard that mandates or recommends each control.
- ✓Worker consultation record section per WHS Act s.47 for documenting consultation with workers and HSRs on the content of this SWMS.
- ✓Worker sign-on register (blank, single page, expandable) for recording daily worker acknowledgement of the SWMS content, hazards, and required controls.
- ✓Applicable legislation and Codes of Practice schedule pre-populated for NSW with a state-variance reference table covering VIC (OHS Act 2004), QLD, SA, WA, TAS, NT, and ACT.
- ✓Emergency procedure template with fields for emergency contacts, nearest hospital, first aid officer, evacuation assembly point, and incident reporting procedure.
- ✓Revision log for documenting SWMS reviews, amendments, and version history as required by WHS Regulation r.300.
Worked example
A team of two licensed tradespeople and one apprentice is subcontracted to perform excavator use — plumbing trenches at a veterinary clinic construction in Cabramatta, western Sydney. The project is managed by a Principal Contractor under a $2.1 million head contract. Before mobilising to site, the licensed plumber downloads this SWMS and customises it: entering the PCBU name and ABN, the site address, and the Principal Contractor details on the title page. The 9 hazards are reviewed against the specific site conditions — struck by excavator bucket or slew, underground services strike, trench collapse are confirmed as relevant. The work triggers HRCW Category 14 under Schedule 1 of the WHS Regulation 2025, requiring this SWMS to be prepared before work commences and provided to the Principal Contractor. At the Monday pre-start meeting, the licensed plumber briefs the crew on the SWMS content, walks through the hazard register, confirms PPE requirements, and has all workers sign the sign-on register. The signed SWMS is stored in the site shed and a digital copy emailed to the PC's document controller. On Wednesday, an unexpected underground service is discovered — the SWMS is amended to add the new hazard, the crew is re-briefed, and all workers re-sign the updated version. The revision is logged in the revision history.
Related legislation
- Work Health and Safety Act 2011 (NSW) — Section 19 primary duty of care; Section 27 officer due diligence; Section 47 consultation with workers; Section 272 offences relating to duties.
- WHS Regulation 2025 (NSW) — r.298 (meaning of HRCW and when SWMS required), r.299 (preparation and content of SWMS), r.300 (review, update, and availability of SWMS).
- WHS Regulation 2025 (NSW) — Schedule 1 (18 categories of high-risk construction work).
- Code of Practice: Construction Work (SafeWork Australia, 2018) — principal contractor duties, SWMS requirements, site management obligations.
- WHS Act 2011 (NSW) — Section 26A (amendment commencing 1 July 2026): 34 approved Codes of Practice become legally binding duties.
- Building Code of Australia (National Construction Code, 2022) — applicable volumes and parts for the class of building work.
- Plumbing and Drainage Act 2011 (NSW)
- WHS Regulation 2025 (NSW) — r.309 (high-risk construction work licences) and Schedule 3 (classes of high risk work requiring a licence).
Frequently asked questions
What specific hazards does this Excavator Use — Plumbing Trenches SWMS cover?
This SWMS identifies and assesses 9 hazards specific to excavator use — plumbing trenches, including struck by excavator bucket or slew, underground services strike, trench collapse, and excavator rollover. Each hazard is documented with a realistic worst-case consequence, an inherent risk rating using a 5x5 likelihood-consequence matrix, specific control measures ordered by the hierarchy of controls, and a residual risk rating after controls are applied. The controls reference the applicable WHS Regulation section, Code of Practice, or Australian Standard so you can demonstrate regulatory compliance.
Is this SWMS written for WHS Regulation 2025 or 2017?
This SWMS is written against WHS Regulation 2025 (NSW) — the current regulation that commenced on 22 August 2025 and replaced the superseded WHS Regulation 2025. All regulation references (r.298, r.299, r.300, Schedule 1) cite the 2025 Regulation. Many competitor SWMS templates still reference the 2017 Regulation — those templates are referencing repealed legislation and should not be used without updating the regulatory citations.
Can I use this SWMS in states other than NSW?
Yes, with amendments. The SWMS includes a state-variance reference table covering all Australian jurisdictions. For Queensland, South Australia, Tasmania, NT, ACT, and Western Australia, the core WHS framework is similar (model WHS Act) and the amendments are minor — primarily regulator contact details and penalty unit values. Victoria requires more significant amendment because it operates under the OHS Act 2004 and OHS Regulations 2017, uses different terminology (Compliance Codes rather than Codes of Practice), and does not have Section 26A. The state-variance table identifies the key differences for each jurisdiction.
How do I customise this SWMS for my specific project?
Open the DOCX in Microsoft Word and complete the title page fields — PCBU name, ABN, site address, project name, and Principal Contractor details. Review the 9 hazards against your actual site conditions: confirm which hazards apply, add any site-specific hazards not already listed (e.g. proximity to a school, heritage constraints, contaminated ground), and adjust control measures to reflect your available equipment, crew competencies, and site access arrangements. Replace the emergency contacts with the actual site emergency number, nearest hospital, and your first aid officer. Add your company logo to the document header. Have the PCBU sign the approval block, brief all workers on the content, and collect sign-on register signatures before work commences.
Which HRCW categories does excavator use — plumbing trenches trigger under Schedule 1?
This activity triggers Category 14 — Work on or near a trench or shaft. Because the work is HRCW, a SWMS must be prepared before work commences (r.299), kept available on site (r.300), and provided to the Principal Contractor if requested. The SWMS documents each triggered HRCW category and the specific task elements that meet the Schedule 1 definition, so you can demonstrate to SafeWork NSW inspectors exactly why a SWMS was prepared and how the hazards are controlled.
Is this SWMS compliant with the Section 26A changes commencing 1 July 2026?
Yes. From 1 July 2026, 34 approved Codes of Practice become legally binding under Section 26A of the WHS Act (NSW). A PCBU must either comply with each applicable Code or demonstrate an equivalent or higher standard. This SWMS already cites the relevant Codes that will become binding — no amendment is required for the July 2026 transition. The applicable Codes are listed in the legislation schedule with their Section 26A status clearly marked.
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