Arnold v Minister Administering the Water Management Act 2000 [2014] NSWCA 386

Arnold v Minister Administering the Water Management Act 2000 [2014] NSWCA 386

The Water Management Act 2000 (NSW) does not impose a mandatory requirement for the Minister to rely on a sound numerical groundwater model when determining sustainable yield and recharge in making a water sharing plan. The use of the Ecoseal model, even though flawed, was rational and not manifestly unreasonable since expert advice suggested its value as an interim measure, and mitigating provisions were included in the plan. The Minister was not misled in the legal sense by advice about the model, as the statutory scheme did not require its soundness to be considered. The obligation to have due regard to socio-economic impacts did not necessitate a formal study or farm-by-farm analysis;...

Parties
Appellants: Alan Arnold and 107 others; First Respondent: Minister Administering the Water Management Act 2000; Second Respondent: State of New South Wales
Jurisdiction
Australia
Judgment Date
13 November 2014
Procedural Posture
Appeal / Final Determination
Outcome
Appeal dismissed with costs.
Legal Topics
Judicial Review, Water Management, Manifest Unreasonableness, Mandatory Relevant Considerations, Socio Economic Impact Assessment, Groundwater Modelling
Administrative Law Environmental Law Judicial Review Water Management Manifest Unreasonableness Mandatory Relevant Considerations Socio Economic Impact Assessment Groundwater Modelling

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Parties

Alan Arnold and 107 others

Appellants

Minister Administering the Water Management Act 2000

First Respondent

State of New South Wales

Second Respondent

Procedural Posture

Appeal / Final Determination

Legal Issues

  1. 1 Whether the Minister failed to comply with a mandatory requirement to consider sustainable yield and recharge, requiring a reliable numerical groundwater model.
  2. 2 Whether the Minister's decision to make the Water Sharing Plan was manifestly unreasonable due to reliance on a flawed groundwater model.
  3. 3 Whether the Minister's decision was invalid because misleading information was provided to him concerning the quality of the groundwater model.

Ratio Decidendi

The Water Management Act 2000 (NSW) does not impose a mandatory requirement for the Minister to rely on a sound numerical groundwater model when determining sustainable yield and recharge in making a water sharing plan. The use of the Ecoseal model, even though flawed, was rational and not manifestly unreasonable since expert advice suggested its value as an interim measure, and mitigating provisions were included in the plan. The Minister was not misled in the legal sense by advice about the model, as the statutory scheme did not require its soundness to be considered. The obligation to have due regard to socio-economic impacts did not necessitate a formal study or farm-by-farm analysis;...

Court Disposition

Appeal dismissed with costs.

Orders

  • Appeal dismissed with costs.