Methven reservoir funds

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Ashburton council has allocated additional funds of $221,700 for the upgrade of the Methven reservoir.

The reservoir provides an essential buffer for Methven’s treated water, and without it, the scheme would not be able to supply water at times of peak demand. Supply would also be lost if the treatment process needed to shut down for any reason.

Following recommendations by council staff, the additional funds will ensure the upgrade project can be completed and objectives such as the provision of an adequate and reliable source of water met.

The 810m3 concrete reservoir is the only water storage for the Methven supply and has been assessed as a seismic risk. The top water level has now been reduced to around 700m3 because of that risk.

There are also a number of significant leaks in the reservoir and the state of its interior is unknown.

To do a thorough investigation it is necessary to drain the reservoir, which is not a practical option without a backup.

Ashburton council has decided to install and a commission a new 500m3 seismically resilient tank.

Work will then be carried out on condition assessments and repairs to the existing main concrete water reservoir.

The additional tank will bring the total water storage volume up to 1200m3.

So far around $8,000 had been spent on the options study and related work, before the request for additional funds, said Ashburton District Council group manager service delivery Neil McCann.

The estimate to construct the new reservoir was approximately $720,000 and the repair of the existing tank was around $270,000.

The total of $990,000 was $220,000 more than the original budget, hence the request for additional funds, said Mr McCann.

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