![]() Both TasWater and SA Water’s PRAs included 18 large dams of varying types, sizes and ages. It has also worked with other Australian clients such as TasWater and SA Water. The business is part of Hydro Tasmania and has successfully applied the PRA process to Hydro Tasmania’s portfolio of 43 large dams and its small dam portfolio. Risk assessment (evaluating and aggregating risks against failure scenarios and developing upgrade concepts to reduce risks).Įntura says the aim is to design and deliver solutions to increase dam safety and reliability, improve dam performance, and extend the life of dam assets.Consequence assessment (assessing social, financial, environmental and other risks).Engineering assessment (identifying failure modes and assessing compliance with standards).Flood hydrology and site-specific seismic hazard assessment.PRAs can also identify knowledge gaps, reveal potential ‘quick wins’, and can be used to review surveillance and monitoring practices relevant to each dam’s risk position and key failure modes. They can then prioritise where and when to target dam safety works to reduce risk and optimise their investment – rather than allocating resources randomly or equally. This is where specialist power and water consulting business Entura believes that its dam portfolio risk assessment (PRA) comes into its own and can support dam owners, especially those with a large portfolio of assets, helping them to understand the risk position across their whole portfolio. Sometimes it is hard to see the bigger picture or determine where interventions will be most effective. This can be challenging for owners who manage a portfolio of dams of different ages, types and consequences. ![]() When resources are limited, they need to determine where and when their safety interventions will achieve the greatest reduction of risk. Richard Herweynen, Technical Director of Water at Entura, and Amanda Ashworth, Director of Strategy, Sales and Commercial, and Manager of the Entura clean energy and water institute, give an insight into their dam safety experiencesĭam owners carry a great responsibility to keep their dams safe.
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