Bulk Earthworks SWMS

Bulk earthworks is large-scale cut-and-fill: stripping, excavating, hauling, placing and compacting earth across a site. It is high risk construction work under the WHS Regulation because cut faces and excavations exceed 1.5 m and the work is dominated by the movement of powered mobile plant — excavators, dozers, scrapers, dump trucks and rollers operating together (s291), so a SWMS is mandatory (s299). The dominant hazard is plant-pedestrian interaction: a bulk-earthworks site concentrates the largest fleet of powered mobile plant on any project, and a ground worker struck by a reversing dump truck or a slewing excavator counterweight is the characteristic fatality. Running with it are plant rollover on batter traverses and haul roads, contact with overhead powerlines by tipping bodies, cut-face and bench instability collapsing onto plant or workers, and the health and environmental hazards of respirable crystalline silica from silica-bearing rock, dust to workers and neighbours, and noise. The SWMS controls plant-pedestrian separation, exclusion zones, haul-road design, batter stability, silica and dust suppression. It supports the earthworks specification to AS 3798 and does not replace the geotechnical design. It is supplied in eight jurisdiction editions, each citing its own Act, Regulation and regulator.

Hazards identified

8 hazards covered, sorted by priority.

Control measures

Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.

1. 1Elimination — Design haul routes and work areas so plant and people are physically separated and reversing is minimised (one-way loops, drive-through loading)
2. 2Substitution — Substitute remote/GPS machine control and camera/proximity systems for reliance on line-of-sight where practicable
3. 3Engineering — Exclusion zones (typically 30 m for haul units, 15 m for excavators/dozers unless positive comms) and physically delineated pedestrian walkways separated from haul routes
4. 4Engineering — Haul roads designed with windrows, grades and passing bays, and overhead-powerline exclusion zones with goalposts/tiger-tails
5. 5Engineering — Water carts and dust suppression on haul roads and working faces to control silica and dust
6. 6Administrative — Positive communication protocol (call, acknowledge, isolate, approach), documented RIIMPO competency per plant type, and a traffic-management plan
7. 7Administrative — Batter and bench design by a competent person, with inspection after rain, and silica exposure/health monitoring where silica-bearing rock is worked
8. 8Administrative — Spotter/dogger controls for blind-side movements and a fatigue-management plan for operators
9. 9PPE — Type R day/night high-visibility clothing (mandatory for all ground personnel) and Type 1 hard hat
10. 10PPE — Hearing protection and P2 respiratory protection where dust/silica exposure is credible

Applicable Codes of Practice

High-Risk Construction Work triggered

Worked example

At 6:30 am a bulk-earthworks crew from Terra Civil starts a cut-to-fill operation with excavators loading a fleet of dump trucks. The supervisor's first concern is keeping people and machines apart: the haul road is a one-way loop, pedestrian walkways are delineated and fenced off from it, and no ground worker enters the 30 m haul-unit exclusion zone without positive comms. Loading is drive-through so trucks rarely reverse. A surveyor who needs to set out near an active excavator uses the call-acknowledge-isolate-approach protocol, and the operator stops and locks out the slew before the surveyor approaches. The cut face is benched to the geotechnical design and re-checked after overnight rain. A tipping truck near the boundary is kept clear of the overhead line by goalposts and a spotter. Because the rock is silica-bearing, water carts run continuously and the exposed crew are in P2 respirators and on health monitoring. Everyone on the ground is in day/night high-visibility. The shift closes with the faces stable and the plant parked in the designated laydown.

Related legislation

• WHS Act 2011 (model)
• WHS Regulation 2025
• Managing the Risks of Plant in the Workplace Code of Practice
• AS 3798 Earthworks for commercial and residential developments

Frequently asked questions