Rain expected to fill Warragamba and Sydney’s supply dams

Rain expected to fill Warragamba and Sydney’s supply dams

19 March 2021

Forecast heavy rain over coming days is set to push all of Sydney’s water supply dams close to capacity, with many potentially spilling over the weekend, including Warragamba.

Sydney’s major supply storage, Warragamba Dam, currently sits at 97.5% of capacity as part of a total metropolitan dam supply network at 94.6%.

The Bureau of Meteorology is forecasting a coastal trough, which developed along the North Coast yesterday, bringing with it heavy rain across the Greater Sydney catchment Friday night and Saturday.

Public access to WaterNSW dam sites and associated public areas is off limits until further notice as a safety precaution.

WaterNSW modelling suggests, at its current level, more than 90mm of rain across the Warragamba catchment will result in sufficient inflow to push the storage level above capacity and trigger a spill.

WaterNSW has established a dedicated 24-hour incident management team that is working closely with the Bureau and the NSW State Emergency Service to monitor weather and inflows to dams.

WaterNSW will continue to work closely with Sydney Water and NSW Health throughout the rain event, to watch for potential water quality impacts on untreated supply.

For weather forecasts and flood warnings visit http://www.bom.gov.au/

For emergency information visit https://www.ses.nsw.gov.au/ or contact 132 500

For information on WaterNSW dams visit our alerts page or contact 1300 662 077

Media contact – Tony Webber - 0428613478

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94.0
Tuesday 19 October
0.2
2,426,378 ML
2,581,850 ML
9,092 ML
1,299 ML
4,444 ML
Tuesday 19 October