Shire of Serpentine Jarrahdale IWMS

WGA AU | Wallbridge Gilbert Aztec - Photo: Shire of Serpentine Jarrahdale IWMS

The Project

With one of the fastest growing communities in Australia, The Shire of Serpentine Jarrahdale was one of the first districts in WA to investigate the adoption of an integrated water management strategy to support their 2050 vision into the future. The Integrated Water Management (IWM) Plan was delivered by WGA in three stages which involved linking the plan to existing strategies, identification of specific drivers, identification of all available water sources, demand analysis, and stakeholder consultation.

Technical Solutions

WGA identified a long list of water supply opportunities (a total of 22) which included sub-surface drainage capture, surface water and reuse of treated wastewater. The long list was refined to a prioritised short list of preferred options using a multi-criteria assessment tool

A key innovation in the development and application of the multi-criteria assessment tool was to separate the criteria and economics. This distinction was made to eliminate the risk that options would be ruled out purely based on cost because what might be expensive today may not be expensive in the next 10 years.

Client Focus

The tool has been developed to enable the Shire to re-visit and update their strategy over time. This project won the 2019 Australian Water Association (WA) ‘Innovating for Sustainable Water and Environmental Outcomes’ Award.


The Shire of Serpentine Jarrahdale IWMS is included in the following sectors & services.
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