SunWater Statements – Moolabah Weir St George

08 Feb 2012

Update as at 4:45 pm

At 2pm two SunWater engineers arrived at the Moolabah Weir site to undertake an initial assessment of the damage to the weir.

Their assessment is that the weir is currently stable and is able to withstand the current flood loading and the likely hood of a sudden failure still remains low.

In the unlikely event of the Moolabah Weir failing, there would be no (downstream flooding) impact on the St George or Dirrianbandi townships, there would however be an impact on the Moonie Highway which is currently flooded and closed.

An exclusion zone downstream of the weir remains in place as a precautionary measure.

SunWater engineers will now work with local emergency services to formalise communication arrangements regarding actions at the weir.

Local SunWater staff will be positioned at the weir and undertaking 24 hour surveillance, and will provide status updates to SunWater engineers.

SunWater remains in regular contact with the Local Disaster Management Group and emergency services.

Additional updates will be provided should the situation change.

 

Update as at 1:15 pm

Over the last 16 hours SunWater has observed some extra movement in the concrete slabs on the Moolabah Weir spillway.

SunWater engineers are in transit to the site.

Further information will be available once engineers have had an opportunity to assess the situation.

Currently, local SunWater staff are at the site and will provide information to the SunWater engineers.

An exclusion zone downstream of the weir remains in place as a precautionary measure.

In the unlikely event of the weir failing, water would flow down the already flooded Thuraggi water course. The water would flow over the Moonie Highway that is currently flooded and closed.

SunWater remains in regular contact with the Local Disaster Management Group and emergency services.

 

Update as at 9am

Yesterday afternoon (07/02/12) SunWater staff observed some movement of some of the concrete slabs on the Moolabah Weir Spillway near at St George, and immediately advised the Local Disaster Management Group (LDMG).

SunWater is deploying engineers from Brisbane to inspect the weir and to undertake further assessment and undertake a safety inspection of the weir.

SunWater has advised that there is a low but finite probability of the weir failing. As a precautionary measure last night the LDMG issued a limited evacuation order to properties downstream of the weir.

In the unlikely event of the weir failing, water would flow down the already flooded Thurraggi water course. The water would then flow over the Moonie Highway that is currently also flooded and closed.

Once Beardmore Dam drops back to Full Supply Level the flows to Thuraggi will fall over a few days. SunWater will then commence dropping the storage to reduce the loading and also undertake a further safety inspection.

If the weir is then deemed safe following the inspection it may be possible to refill the storage on the tail of the event.

Moolabah Weir is located in St George on the Thuraggi Water Course upstream of the Moonie Highway bridge. The weir has a storage capacity of approximately 2,000 ML of water under normal circumstances.

 

Media Enquiries

Olga Kakourakis
Corporate Relations
Phone +61 7 3120 0043
Mobile 0423 824 860
Email Olga.Kakourakis@sunwater.com.au

Subscribe so you can receive SunWater's Latest News sent directly to your email address.