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Project three - Re-consenting, then upgrades to the Takapau Wastewater System

Background

The Takapau Wastewater Treatment Plant has a consent expiring in October 2021. The plant performs to reasonable standard however requires some improvements. It has a basic oxidation pond treatment and currently discharges to the Makaretu River via a wetland, however Council has heard from the community that there is an appetite to explore a land-based discharge system.

Existing Wastewater Network

Map base v2 1 Takapau Existing

Option One

  • Undertake minor upgrades to the current wastewater treatment plant.
  • Establish new land site and add value through treating land with wastewater (e.g can grow something, or irrigate)
  • Add storage and cease river discharge

Benefits:

  • Cease river discharge
  • New land discharge with the ability to potentially have some form of reuse
  • Improved treatment levels

Map base v2 11 Takapau Option 1

Option two

  • Undertake minor upgrades to the current wastewater treatment plant.
  • Continue to discharge to the river in wet high flows
  • Discharge to land int he dry

Benefits:

  • New land discharge
  • Improved treatment levels

Map base v2 3 Takapau Option 2

Option three

  • Undertake minor upgrades to the current wastewater treatment plant.
  • Discharge to a land based discharge system.
  • Cease discharge to the river.

Benefits:

  • Cease river discharge
  • New land discharge via high rate disposal
  • Improved treatment levels

Map base v2 1 Takapau Option 3

Approximate Project Two Cost

The costs go through a refining process as the design progresses. We are currently at a very early pre-concept design phase, and expect the costs to be in the vicinity of $2m for Project Two.

How might this project be staged?

The way we stage this work will impact the immediate effect on Central Hawke’s Bay’s rates.

  • All at once within 2 – 3 years
  • Staged within 5 years
  • Staged within 10 years
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