1 Boral Construction Materials Group Limited (the defendant) pleaded guilty to one offence under s 8(1) of the Occupational Health and Safety Act 2000 (the Act). The charge alleged that the defendant failed to ensure the health safety and welfare, "of its employees, and in particular Matthew Coote". The failure to ensure safety was the subject of two particulars. The first particular (particular (a)) focused on the failure, "to provide and maintain a safe system of work in relation to the process of accessing the dust extraction unit requiring work at a height of approximately 15 metres ... This included a failure to have an adequate system in place for the selection of contractors and plant". The second particular (particular (b)) alleged a failure, "to provide adequate information, instruction, training and supervision", in relation to the "process of accessing the dust extraction unit requiring work at a height of approximately 15 metres".
2 The dust extraction unit was located about 15 metres above ground level on an asphalt batching plant. The plant was operated by Bitupave Limited, trading as Boral Asphalt. The defendant's employees performed work at the plant. One of its employees was Matthew Coote who was a Grade 4 plant operator at the premises. The classification of Mr Coote's work as "Grade 4" meant that he was regarded as a senior employee although he had no supervisory or management functions.
3 At some stage in June 2006, a duct comprising part of the dust extraction unit became blocked. On 17 June 2006, Mr Coote was instructed to clear the blockage. This involved cutting the duct with an oxyacetylene cutter and a rod in order to clear the blockage. The blocked duct could not be accessed via the unit. Boral Asphalt had originally intended to hire an 80 foot boom lift to perform the task, however, it was unavailable on 17 June. An alternative work method was decided upon which involved using a work box suspended by a crane.
4 Boral Asphalt engaged S&P Jackson Pty Limited trading as North Coast Cranes (North Coast Cranes) to provide the necessary plant to facilitate access by Mr Coote to the blocked duct. North Coast Cranes supplied a 15 tonne Tadano crane and a work box. It also supplied a crane driver (Mark French) and a dogger (Brendan Currie). The work method decided upon was that Mr Coote and Mr Currie would be suspended above ground in the work box supported by the crane. Mr Currie's presence in the work box was required so that he could assist Mr French in manoeuvring the work box.
5 After Mr Coote and Mr Currie had been suspended 15 metres above ground in the work box for approximately one hour, Mr Currie instructed the crane driver to lower the work box about one metre in order to enable Mr Coote to access another section of the duct. When Mr French attempted to lower the suspended work box, either the hydraulics or the controls of the crane failed causing the work box to fall to the concrete pavement at ground level. On its descent the work box collided with part of the plant and a fence which reduced the impact of the fall. According to the agreed facts, the work box did not "freefall" because of mechanical resistance in the crane working mechanism. Nevertheless, as a result of the fall, Mr Coote sustained serious injuries, including soft tissue, ligament and cartilage damage on his knees and ankles. He was off work for four months after which he returned to work on "suitable duties".
The risk to safety
6 The agreed facts record that there was a failure either of the hydraulics or the controls of the crane. The cause of the failure, however, was not ascertained. The prosecutor, therefore, did not rely on a risk to safety arising from defective crane mechanisms, or that the incident (and resultant injuries suffered by Mr Coote) was a manifestation of the relevant risk to safety. The risk to safety was characterised by the prosecutor in written submissions in two ways, as, "the risk to safety of employees working at heights", and, "the risks from the use of a work box suspended from a mobile crane". These risks were both said by the prosecutor to be "well known". In oral submissions during the sentence hearing, Mr Magee of counsel on behalf of the prosecutor, informed the Court that no reliance was sought to be placed on the use of the work box as an inappropriate method of work. Nor was the prosecutor contending that the crane was inherently unsafe or inadequately maintained. Instead, the prosecutor relied on a number of systems failures on the part of the defendant. These systems failures were said to be found, primarily, in the procedures for choosing contractors to supply plant or equipment. Although the defendant did have a preferred supplier (North Coast Cranes), it did not require the supplier to provide documents confirming that the plant to be supplied was in a safe and serviceable condition, or adequately maintained, or that adequate inspections had been performed. It was not suggested by the prosecutor that the crane and work box (the relevant plant supplied) did not meet any of these specifications.
7 Other systems failures set out in the agreed facts were also relied upon by the prosecutor. These will be discussed in more detail later in the sentencing reasons. For present purposes, the prosecutor, in addressing the Court, acknowledged that the defendant's systems failures as particularised in the charge, were not of themselves, "... directly causative of the incident", adding by way of qualification that the defendant's failures were, nevertheless, "reflective of the nature of the type of injuries that could have been sustained.
8 The defendant, in submissions, sought to emphasise two matters, first, that the proximate cause of the risk to safety was not established, and secondly, that the charge, as particularised, did not include an allegation that the "plant" was defective or otherwise unsafe.
9 Before dealing further with these matters it is necessary to resolve an issue between the parties as to the characterisation of the risk to safety. According to the defendant, the prosecutor in submissions, had impermissibly sought to characterise the relevant risk to safety on a broader basis than was envisaged, both by the charge and in the agreed facts. It emerged from the prosecutor's oral submissions during the sentence hearing that reliance was in fact being placed on three separate risks to safety arising from the work performed at height on 17 June 2006. The first of these risks was described as the "broad risk" which was the risk of a fall from height. The second risk, described as the "narrow risk", was said to arise from working at height in plant. The third formulation of the risk by the prosecutor was the risk of working at height in a work box suspended from a mobile crane. According to the prosecutor, the defendant's systems were inadequate (as alleged by particular (a) of the charge) in that they failed to address each of those three categories of risk.
10 As a general observation, I note that neither the charge, nor the agreed facts, contain any clear expression of the prosecutor's formulation of the risks to safety. The only reference in the charge to a risk is the allegation that "as a result of the defendant's failures Matthew Coote was placed at risk of serious injury". The agreed facts provide substantial elaboration of the failures alleged against the defendant, but they do not refer at all to a risk to safety, either in isolation or in connection with any of the defendant's acts or omissions set out in the document.
11 A close inspection of the agreed facts reveals that most of the acts and omissions are described in that document in the context of the work being performed on 17 June 2006, that is, in the work box suspended from the crane supplied by North Coast Cranes. According to the agreed facts, particular (a) encompasses multiple failures on the part of the defendant. These multiple failures I have summarised in the following way:
· the failure to undertake a risk assessment with regard to, "the use of a crane and work box";
· the failure to "source" adequate information to enable work to be performed safely from the suspended work box;
· the failure to supply North Coast Cranes with detailed specifications of the work to be performed, instead relying on North Coast Cranes to supply, "the appropriate plant";
· the failure to obtain service and maintenance records from North Coast Cranes "in relation to the crane provided";
· the failure to have an adequate system for selecting "suppliers of plant, and ensuring that those suppliers provided safe plant";
· the failure to maintain an adequate preferred supplier list in that it did not ensure, "those suppliers", provided safe plant;
· the failure to obtain a safe work method statement from North Coast Cranes in relation to the proposed method, "to be used to lift the work box" and manoeuvre it into position";
· the failure to develop in conjunction with North Coast Cranes a work procedure for the transfer of material to and from the work box.
12 The notion of causation in the context of an offence under s 8(1) of the Act involves the making of a logical, commonsense connection between an act or omission and a resultant risk to safety: see for example Crown in Right of the State of New South Wales (Department of Education and Training) v O'Sullivan (2005) 143 IR 57 at [45]. The elaborate and extensive reformulation of particular (a) set out in the agreed facts largely illustrates this. The causative facts must necessarily be referable to the circumstances underpinning the offence. In the present matter, the defendant, on the day of the offence, engaged its preferred supplier, North Coast Cranes, to provide plant and equipment to enable Mr Coote to access the blocked duct. The plant and equipment supplied was the crane and suspended work box. The work was performed utilising that plant and equipment. The risk to Mr Coote's safety arose while he was attempting to access the blocked duct from the suspended work box at a height of 15 metres. The cause of that risk (although not the direct or proximate cause) is found in the defendant's deficient systems of work constituted by the various acts and omissions as set out in the agreed facts (extrapolated and expanded upon by agreement, from the particulars in the charge).
13 I intend therefore to proceed in these sentencing reasons on the basis that the relevant risk to safety at the time of the offence was the risk of a fall from height while working in a work box suspended from a crane at a height of 15 metres. I should add for completeness that particular (b), as revealed in the agreed facts, focuses exclusively on the risk to Mr Coote's safety, as well as the safety of other employees, by reference to the actual work being performed on the day of the offence (accessing the blocked duct from the suspended work box).
Systems of work in place prior to the offence
14 The defendant's systems failures at the time of the offence (as extracted from the agreed facts) have been set out above and need no repetition. They were extensive and revealed serious deficiencies.
15 It is acknowledged, however, that at the time of the offence the defendant, as a member of a large corporate group, known as the Boral Group, operated under a comprehensive and established system of safety designed for application to all related divisions and corporate entities belonging to the group.
16 This system was set out in the affidavit of Terence Jackson, an employee and regional manager of Boral Asphalt. Mr Jackson explained that within the Boral Group there exists a demarcation of roles and functions with the members of the Group all conducting operations in accordance with the same systems.
17 Prior to the offence, the Coffs Harbour Asphalt batching plant (where the incident occurred) had in place a risk management process consisting of three elements, which were: