Department of Labour v Deon Riwhi Williams

JurisdictionNew Zealand
CourtDistrict Court
JudgeJudge Gt Winter
Judgment Date10 February 2011
Docket NumberCRN 09092506443
Date10 February 2011


CRN 09092506443

Department of Labour
Deon Riwhi Williams

Defendant charged with failing to take all practicable steps as an employee to ensure the safety of other employees pursuant to s19 Health and Safety in Employment Act 1992 (duties of employees) — defendant drove a truck which skidded on narrow wet track and crashed into house other employees working under — trace amounts of methamphetamine in defendant's system — whether there was a causative link between methamphetamine use and failure to take all practicable steps — whether defendant should have foreseen consequences of methamphetamine use.

Held: While causing harm to any person was not a necessary ingredient for a breach of s19 HSEA to be proved, there had to be a causative link between the action of the accused and the failure to take the practicable steps on the one hand and the harm or likelihood of harm on the other. That meant there had to be a causative link between W's methamphetamine use and the failure to take the practicable step of not driving the dump truck on the one hand and the deaths and injuries that were caused. Section 2A(2) HSEA (all practicable steps) emphasised that a step was only reasonably practicable in respect of any harm if the person with the obligation to eliminate or reduce the risk knew or ought to have known of the circumstances that created it.

In these types of cases, the informant needed to prove that consumption of methamphetamine prior to operating a dump truck could lead to harm. There had to be some evidence of impairment and effect to prove that the defendant was alert to what practicable steps he could take, including not operating the dump truck. No evidence had been provided concerning: standard operating procedures for machinery of this type; the topography or direct engineering evidence concerning the height or slope of the track. There was also no evidence of impairment or effect, in fact quite the opposite. The informant had conceded that the very low level of methamphetamine may not have impaired W's ability to operate the dump truck.

There was no causative link established between W's methamphetamine use, the failure to take practicable steps and the harm caused. A reasonable man with knowledge of W and his characteristics would not have foreseen that W was incapable of safely operating the machine. W was not alerted to the circumstances that having a very low level of methamphetamine in his system have have created a risk of harm. It was therefore not a practicable step for him to have refused to drive a vehicle when he turned up for work. Accordingly as W could not have known or foreseen the relevant circumstances giving rise to the risk of harm, he had no obligation to take the reasonably practicable step to avoid that risk of harm by not driving the dump truck.

Charge dismissed.

DECISION OF Judge Gt Winter


The 26 June 2009 was an important day for the Manurewa Marae and its trustee Tame Wiremu. Mr Wiremu and his young nephew the defendant, Deon Williams worked that day to prepare the grounds around a relocated house, the proposed home for a long awaited medical centre.


Waepeke Ruihana Tupaea, Marsh Terahi Peihopa, Jamie Lee Jeffrey and Peter Francis Tarrant were about and underneath the relocated house while Mr Wiremu and his nephew were shifting soil so it could be used for landscaping.


Mr Wiremu was operating a digger and loading a rubber tracked dump truck driven by his nephew. The 12 tonne dump truck had been hired the previous week. Described as a specialised piece of plant it required the use of both hand levers and a joystick to control its direction and movement.


Mr Wiremu had chosen the narrow path to be used by the dump truck. 1 At its narrowest point there was approximately 4.5 metres between the 1.6 metre high vertical cut edge above the house and the outer boundary of the route which was formed by some trees. The slope of the path as it passed the house was a significant 15.5 degrees. Taking into account the width of the machine this meant that the maximum clearance the dump truck had along this path was only 1.86 metres. 2


Deon Williams continued to use this path and had completed about 12 trips before the weather over the Manukau Harbour changed for the worse. At about 2:00 pm Mr Wiremu decided because of the deteriorating weather conditions that he and his young nephew would finish for the day after Deon emptied one last load from his dump truck.


The defendant started driving his heavily laden dump truck along the narrow path towards the rear of the house. It was by then raining heavily.


As the defendant was driving near the house on this wet incline, the dump truck lost traction, skidded down the slope on the wet soil and crashed into the side of the house. The house started to slowly fall away towards the sea and eventually collapsed to the ground from a height of 1.6 metres.


Waepeke Ruihana Tupaea and Marsh Terahi Peihopa were working under the house when it collapsed and they were killed. Jamie Lee Jeffrey and Peter Francis Tarrant who were working about the house at the time were badly injured.


Approximately 31/2 hours after the incident the defendant volunteered a sample of his blood. An analysis of that sample revealed trace levels of methamphetamine at 0.05 mg per litre of blood. The defendant gave that blood sample to an experienced medical practitioner and police doctor Lynnette Mary Ashby. Doctor Ashby has been practicing medicine for 16 years and counts among her formal qualifications a post-graduate diploma of community emergency medicine.


Doctor Ashby could smell no alcohol or solvents on the defendant. Deon Williams presented with a Glasgow Coma score of 15/15. His blood pressure was normal. His mini mental state examination was executed well. His neurological examination was normal. In particular all coordination tests were normal. He had no signs of physical injuries. The doctor concluded that Deon Williams was completely unaffected by drugs or alcohol that would interfere with his ability to be in control of a motored vehicle or machine. It was the police doctor's opinion that Deon Williams presented to her as a normal functioning person unimpaired by drugs or alcohol.


I accept Dr Ashby's opinion. It is consistent with the evidence of the defendant's uncle 3 that at work Deon did not look to be under the influence of any sort of drugs or alcohol. It is also consistent with the defendant's unremarkable driving of this tracked dump truck earlier that day.


It is this tragedy, the deaths of Mr Tupaea and Mr Peihopa and the serious injuries to Mr Jeffrey and Mr Tarrant that bring Deon Williams to court charged with one offence under s 19(b) of the Health and Safety in Employment Act 1992 (“the Act”). It is alleged he was an employee who failed to take all practicable steps to ensure that his actions while at work did not cause harm to others.

The Law

The Act came into force on 1 April 1993 and reformed the law relating to Health and Safety of employees and other people at work. In relation to the proper approach to the Act the Court of Appeal in Central Cranes Ltd v Department of Labour said: 4

It is clear that the Act adopts a preventative approach to maintaining and promoting health and safety in the workplace. Its principal object is to provide for the prevention of harm … The Act does not then adopt a prescriptive approach to the duties of those made responsible for safety in the workplace. It provides a comprehensive set of guidelines but leaves detail of acceptable practices to be worked out and implemented by regulations and codes of practice within the various industries.


Mr Wiremu's company, Wiremu Asphalt Contractors Limited employed the defendant. The company was prosecuted under the Act and convicted upon a guilty plea. It was ordered to pay $22,100 in reparation. The prosecution of an employer does not in any way diminish or affect the responsibility of employees to keep a workplace safe and I lay that circumstance to one side.


Section 19 of the Act creates a statutory duty on every employee to take all practicable steps to ensure their safety while at work. All employees must ensure that no action or inaction of theirs while at work causes harm to any person. Proof of defendant intention is not necessary.

Practicable steps

The phrase is defined in s 2A of the Act as:

  • (1) In this Act, all practicable steps, in relation to achieving any result in any circumstances, means all steps to achieve the result that it is reasonably practicable to take in the circumstances, having regard to:

    • (a) The nature and severity of the harm that may be suffered if the result is not achieved; and

    • (b) The current state of knowledge about the likelihood that harm of that nature and severity will be suffered if the result is not achieved; and

    • (c) The current state of knowledge about harm of that nature; and

    • (d) The current state of knowledge about the means available to achieve that result, and about the likely efficacy of each; and

    • (e) The availability and cost of each of those means.

  • (2) To avoid doubt, a person required by this Act to take all practicable steps is required to take those steps only in respect of circumstances that the person knows or ought reasonably to know about

  • [Emphasis added]


The question of what is practicable is a matter of fact and degree in each particular case 5 but it is not a counsel of hindsight and perfection. 6 The question of

what is practicable is to be resolved at a point in time before the incident occasioning the harm. The section requires an objective assessment of what practicable steps are required to be taken by those who know or ought reasonably to know of the circumstances creating the risk.

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