Queenstown's water supply secured for another 100 years

The Conglomerate Dam upgrade is complete, securing Queenstown’s water supply for the next 100 years.

TasWater CEO Mike Brewster announced the completion of the major project today with a small ceremony on the dam wall.

“It was vital for us to complete the upgrade of Conglomerate Dam, not only to ensure the dam wall remains safe into the future but also for the surety of this important water supply for the residents of Queenstown,” Mr Brewster said.

“We brought on Tasmanian contractor Hazell Bros to complete the works who also hired local subcontractors, keeping jobs in the West Coast community. The upgrade design work was also undertaken by Tasmanian firm Entura.

“It’s a credit to our staff and the staff of our contractor Hazell Bros that this project was completed without a single injury to anybody onsite.”

TasWater Project Manager Darren McAdie says the upgrade has been a major undertaking with the dam wall approximately 16 metres in height and the berm structure extending on the downstream slope to approximately 32 metres in height.
“We have transported 22,000 tonnes of rock, sourced locally with a local contractor, as well as 4,500 tonnes of sand and gravel to the site since May last year,” Mr McAdie said.
“We are grateful to the local residents for their patience with the trucks coming and going through town while we upgraded the dam to meet modern dam design standards.”
Conglomerate Dam holds about 53 megalitres of water - roughly about the same as 21 Olympic-sized swimming pools – and supplies TasWater’s 1610 customers in Queenstown. The storage capacity of the dam has not been increased as part of the upgrade as it has sufficient capacity to meet current and future demand.
The project also included significant works to the dam spillway and improvements to the remote monitoring systems so any sudden changes in the dam will trigger safety alarms in TasWater’s Operations Control Centre.
Significant upgrades are continuing in other parts of the West Coast including a multi-million dollar water and sewerage system upgrade in Rosebery, a major upgrade to the Tullah sewage treatment plant and continuing upgrades to the water and sewerage mains in Queenstown.