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Akaroa
· The
relevant consenting authorities are processing the outstanding resource
consents for the construction of the Akaroa Treated Wastewater Irrigation
Scheme ATWIS project. One of the most significant is the irrigation of the
treated wastewater to land, which is being processed by ECAN. ECAN advised us
that the consent would be notified, and we accepted it.
· Council
has tendered the scheme's design.
· The
land management plan for Robinsons Bay and Hammond Point is nearly complete,
and the Council will tender the implementation to start establishing the
native trees in the lower areas of Robinsons Bay, along with fencing and
track construction.
· Survey
and geotechnical investigations will commence in May 2024. They will span
from the current Akaroa treatment plant to Duvauchelle Show Grounds. We have
commenced advertising the need to temporarily shift vessels from the
Southeast corner of the boat park to facilitate these investigations.
· A
detailed design of the scheme will be carried out over the coming year,
subject to the acceptance of acceptable resource consent conditions.
Construction is expected to commence in early 2026. Construction of the
scheme will take two years.
Duvauchelle
· The
project team is preparing an application for resource consent to discharge
treated wastewater to land. The application will be lodged with ECan by
mid-November 2024.
· Staff
are recommending decommissioning the existing Duvauchelle wastewater
treatment plant. The basis for this decision is as follows:
o It
is more cost-effective to operate a single new modern plant.
o The
existing plant will require significant renewals in the future
o The
slope stability risk from the cliff face beside the plant affects its
operation.
o Flow
modelling has been completed with the combined scheme of the storage facility
at Robinson Bay and three tree trip irrigation areas in the Duvauchelle
forest block, Robinsons Bay, and Hammon Point to determine the amount of
storage required to manage the expected flows.
· An
assessment of the proposed spray irrigation at the golf club has identified a
number of risks that would need to be addressed in the design and/or managed.
The Akaroa Golf Club would need to manage a number of these risks and operate
the irrigation within stringent consent conditions. The cost of installing
and operating a complaint irrigation system is significantly higher than the
approved budget. Council staff are currently assessing options to address
these challenges. This information has been presented to the club.
· Internal
discussions are currently underway to transfer the responsibility of the
forest block behind the golf club to from the Parks Unit to Three Waters for
the proposed drip irrigation within the forestry block. The majority of
existing trees are exotic and have been identified and recommended in a tree
assessment report to be removed and replanted due to H&S risk and
suitability for the new scheme. The area will be replanted with native trees
in a series of staged removal and replanting operations, similar to the other
two irrigation schemes.
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