The works will be undertaken during the dry season. With current dam water volumes at approximately 51 per cent (21 per cent prior to implementing the temporary full supply level) and well below the dam gates, the probability of the gates needing to be operated before or after the gate faces are removed is low.
As of the week commencing 21 June 2021, the top of the concrete spillway crest reflects the maximum height of the dam wall and will operate much like other Sunwater fixed crest dams such as Kroombit and Cania.
In the case of a significant weather event while the gates are off, once the storage level reaches the fixed crest, excess water flows over the spillway with no action necessary by the dam operator.
In accordance with dam safety regulations, the dam’s Spill Operations Manual and Emergency Action Plan is being updated to reflect the removal of the gates from service and temporary increase to storage, prior to their implementation, and communicated to stakeholders in advance.