Wyangala storage volume offers drought options in Lachlan

Wyangala storage volume offers drought options in Lachlan

25 October 2019

The comparatively large volume of water in Wyangala dam offers WaterNSW a range of drought contingency measures to extend dam water supply to Lachlan valley communities.

With Wyangala Dam storage at 20% of capacity – compared to Burrendong at 4.1% - there remains flexibility to make significant water savings by implementing operational changes no longer possible in other drought-impacted valleys.

All major towns in the Lachlan valley potentially have access to alternative supply sources and WaterNSW is working closely with local councils to extend supply from the dam to give communities ample time to ensure standby supply is ready.

Operational changes and other drought measures already ensure that supply is guaranteed until at least June 2020, even under a continuation of extreme drought, and further operational changes would extend that date to October 2020.

Options such as deferred delivery of stock and domestic supply and efficient delivery of allocations and basic landholder rights means town water can currently be supplied entirely with dam water beyond mid-2020 even with zero inflows.

Carryover has already been reduced to 57% availability and flows into regulated Willandra Creek will be cut in December to reduce transmission losses.

WaterNSW met with Lachlan valley councils last week (Thursday, 17 October) and will participate in a NSW Government drought information session in Condobolin on Tuesday, 29 October (5-7pm at Condobolin Sports Club).

WaterNSW will also consult with its local River Operations Stakeholder Consultative Committee on 29 October regarding options to further extend water availability for critical needs with minimal impact on local and regional economic activities.

The NSW Government has announced $659 million to raise Wyangala dam wall.

In 2018-19 inflows in the Lachlan system totalled 107 gigalitres (GL), well below the long-term annual average of 1,212 GL, but at least double that of drought-affected northern valleys.

Read more information on WaterNSW drought operations.

Media Contact – Tony Webber – 0428 613 478

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Thursday 03 December