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Project One - Upgrades to the Waipukurau/Waipawa/Otane Wastewater System

Council is considering three options to bring the Waipukurau/Waipawa/Otane Wastewater Systems up to standard - to meet compliance along with the environmental and cultural aspirations of the community.

Read more about the project and options here.

Background

In 2019, Central Hawke's Bay District Council formally responded to an environment court order concerning the Waipawa Wastewater Plant and outlined a proposed long term plan for the future of Waipawa, Waipukurau and Otane’s wastewater. Following two independent reviews, we know that the current Waipawa and Waipukurau plants will never be able to achieve compliance. This means that in order to meet regulations, major upgrades will need to take place. Otane’s current Wastewater Treatment Plant also required an upgrade to meet consent. To help guide our direction, a formal analysis took place through 2018 and 2019 which resulted in the decision that Otane’s wastewater should be conveyed toward Waipawa for treatment and discharge.

Through all of this, Council has been working closely with community members to develop options which focus on generational thinking to ensure a positive balance between the environmental health of our District, the strength of our infrastructure to enable Central Hawke’s Bay to Thrive, and affordability for all of our people.

The Existing Network

Map base v2 9 WWO Existing


Option one

  • A new Wastewater Treatment Plant is built in Waipawa
  • Otane’s wastewater is conveyed via pipeline to Waipawa’s Wastewater Treatment Plant
  • Waipawa/Otane Discharge to Walker Road Land – Rapid Infiltration beds
  • A new Wastewater Treatment Plant is built for Waipukurau
  • Waipukurau’s Discharge to Ford Road (TBC) to Land – Rapid Infiltration beds

Benefits:

  • No more direct river discharge (apart from major rain events)
  • No more discharge to the Papanui Stream
  • A high level of treatment prior to land discharge
  • Has the ability to grow as the community grows
  • Able to entice industry growth

Result:

  • 2 new Wastewater Treatment Plants
  • 2 new discharges

Cost:

  • Circa $54m

Map base v2 10 WWO Option 1


Option 2

  • A standalone, new Wastewater Treatment Plant is built in Waipawa.
  • Discharge to Land at Walker Road through a Rapid Infiltration Bed
  • Otane and Waipukurau’s wastewater conveyed via pipeline to the Waipawa Wastewater Treatment Plant.
  • Stage over 7-10 years

Benefits:

  • No more direct river discharge (apart from major rain events)
  • One plant in a rural out of urban zone location
  • No more discharge to the Papanui Stream
  • A high level of treatment prior to land discharge
  • Has the ability to grow as the community grows
  • Able to entice industry growth
  • Transition away from a plant in Waipukurau

Result:

  • 1 new Wastewater Treatment Plant
  • 1 new discharge

Cost:

  • Circa $49m

Map base v2 11 WWO option 2

Option 3:

  • Minor Upgrades to Waipawa’s existing Wastewater Treatment Plant
  • Otane’s wastewater is conveyed via pipeline to Waipawa’s Wastewater Treatment Plant
  • Waipawa/Otane Discharge to Land at Walker Road via a RIB
  • Minor Upgrades to Waipukurau’s existing Wastewater Treatment Plant
  • Waipukurau’s Discharge to Land at Ford Road (or similar) via a RIB

Benefits:

  • No more direct river discharge (apart from major rain events)
  • No more discharge to the Papanui Stream

Result:

  • 0 new Wastewater Treatment Plants
  • 2 new discharges

Cost:

  • Circa $30m

Map base v2 12 WWO Option 3

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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