Bore investigation continues to identify backup sources

While a test bore behind the Tenterfield Transport Museum produced good flows, the bore exploration process continues with council keen to hedge its bets.
While a test bore behind the Tenterfield Transport Museum produced good flows, the bore exploration process continues with council keen to hedge its bets.

Infrastructure works to secure the water supply to Tenterfield township continue with the test bore construction phase expected to conclude before the end of this month, when some of the more desirable bores will be converted to production bores.

Tenterfield Shire Council said the scope of the water security works currently being undertaken includes the establishment of multiple water supply bores, construction of one or more rising mains from the bore sites to the water treatment plant, and the provision of an emergency water treatment facility to treat the ground water in case the Tenterfield Dam runs dry.

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"Whilst it is pleasing that a good source of water has been identified in the vicinity of the Tenterfield Transport Museum, it is essential to establish at least two or more water sources each geologically separated in case of unexpected bore failure," council said in a statement.

"The process that council follows to establish a production bore includes the identification of potential borehole sites by virtual drilling, test bore construction, installation of bore casing, 72 hour test pump followed by water level recovery monitoring.

"As part of this process, council is also required to monitor the impact on nearby bores and wells.

"Should the test bore be considered to be beneficial, an application is made to the Natural Resources Access Regulator (NRAR) for a Works Approval to construct a production bore. Prior to issuing works approvals, NRAR takes into account any impact that may be caused to nearby bores.

"Whilst the town can survive on a flow rate of 10.5 litres per second during drought conditions, for water security it is essential that council is able to access at least this flow from multiple sources, so that in the event of failure council can switch from one water aquifer system to another."

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