Oxford Rural No.1 Water Supply Source Upgrade Project

The proposed strategy is to replace the existing Waimakariri River intake with new deep wells to provide a high quality water source that also provides for future growth on the scheme.

There is a project underway to upgrade the source for the Oxford Rural No.1 water supply scheme. The proposed strategy is to replace the existing Waimakariri River intake (which does not comply with the drinking water standards and is at capacity) with new deep wells to provide a high quality water source that also provides for future growth on the scheme.

Two wells have been drilled to date at the western end of Rockford Road. The first did not strike any water. The second well found a high quality water source. It has with a capacity of approximately 7 L/s, out of the total projected future demand of 30L/s. This well is in the process of being connected up to the scheme, and is expected to come online later this month.

With the new well only providing some of the required capacity, a new well (or wells) are still required. Council staff have been investigating options where to drill. 

Two options have been considered for the new well location:

Option 1 - West End of Rockford Road
An additional well or wells could be drilled in the area of the new 7 L/s well at the western end of Rockford Road. This would have the advantage that the least amount of pipework would be required to connect up to the existing reticulation. This has proven to be a lower yielding area on average and therefore there is a risk that multiple wells would be required to find the required amount of water. The likely expected cost to complete the upgrade for this option is in the order of $1.7 - $2.2M, based on the assumption that two additional bores will be required to find the remaining capacity.

Option 2 - McPhedrons Road near Watsons Reserve Road intersection
This location is further from the existing View Hill reservoir therefore will require more pipework to connect up to the existing system. It has the advantage that it is in a higher yielding area and therefore is more likely to achieve the required yield with only one more well needing to be drilled. The likely expected cost to complete the upgrade for this option is $1.7 – 2.3M based on the remaining required yield being achieved with one more bore.

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about the new well location options currently under consideration by Tuesday 5 April 2017.

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At present the total budget for the project is $2.4M. Once the outcome of the next bore is known staff will be in a position to review whether this budget is likely to be adequate to complete the project. Current projections show that the water rate will increase to $441 per unit of water when the project is complete, relative to the current rate of $400 per unit of water. If the budget is required to be increased these rating projections will need to be reviewed.

Council would like your feedback on the proposal to drill a new bore in the area of the McPhedrons Road / Watsons Reserve Road intersection with the aim of completing the source upgrade project.

All feedback submitted will be considered by the Council’s Utilities and Roading Committee prior to drilling commencing.