WaterNSW are controlling the water level at Warragamba following recent inflows

After a prolonged period of drought that saw Warragamba Dam levels drop below 45 per cent, WaterNSW has continued to make controlled, operational releases from Sydney's largest supply dam.

Now at 98.6 per cent of storage capacity, the recent inflows have provided a major boost to Greater Sydney's future water supply.

Filling up: Water is slowly being released from Warragamba Dam as levels reach 98.6 per cent of storage capacity. Picture: Chris Lane.

Filling up: Water is slowly being released from Warragamba Dam as levels reach 98.6 per cent of storage capacity. Picture: Chris Lane.

WaterNSW has discharged more than 116 gigalitres (GL) of water from Warragamba since the initial spill event in mid-August, with the storage currently sitting 0.74 metres below Full Supply Level.

Levels in the dam will be progressively lowered to 1 metre below FSL creating 74GL of storage capacity and allowing for optimal conditions to operate dam infrastructure.

WaterNSW staff are closely monitoring the dam and catchment. They are also working closely with the Bureau of Meteorology to watch for future rainfall.

Inflows into Warragamba continue at a rate under 2GL per day, while 3.5GL of water is being released daily.

Small releases are made when the dam reaches 100% to avoid the main radial gates repeatedly opening and closing, and to provide a small buffer for future rain events.

Warragamba is the primary supply for the Great Sydney region and not a flood mitigation dam, its primarily objective is to capture and store the maximum volume of water for Greater Sydney.

To release more water prior to a forecast rain event would be a breach of the key operational objective of the dam.

If flooding occurs, the SES are the combat agency in NSW and takes the lead in managing flood impacts.

Official warnings and flood advice are provided by BoM, on their website, and the NSW SES on radio stations and their social media.

The community are encouraged to understand the risk and obtain up to date information on preparing for floods by visiting: https://www.ses.nsw.gov.au/hawkesbury-nepean-floods/.

More information on how WaterNSW operates Warragamba dam when it's at or close to Full Supply Level can be found here.

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