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Background to Chaffey Dam













To meet current Australian National Committee on Large Dams (ANCOLD) and Dams Safety Committee safety standards for high hazard dams, State Water is committed to improving the flood capacity of Chaffey Dam and reducing the risk of dam failure in the event of a flood event.

In 2004 an initial upgrade was undertaken by State Water to raise the dam crest.

In 2009 State Water commenced installation of an auxiliary spillway to immediately improve the safety of the dam. These works were completed in February 2011.

The next stage of the project comprises the augmentation and safety upgrade of the existing dam and will result in an increase to the Full Supply Level (FSL) of 6.5 m and an increase in the permanent storage capacity of the dam from 62 GL to 100 GL.




As part of the Environmental Impact Assessment (EIA) for the Project, WorleyParsons has prepared the Chaffey Dam Augmentation and Safety Upgrade Environmental Impact Statement (EIS).


The EIS is currently being assessed by the Department of Planning and Infrastructure. The Minister for Planning and Infrastructure is the relevant consent authority.



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