Dannevirke Impounded Water Supply

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To be consulted on later in 2023...

It is all too easy to take water for granted. After all, getting clean, reliable drinking water is as easy as turning on a tap, that is, until things go wrong. It is often only when failures occur that we are reminded of how much we take our access to safe drinking water for granted.

In recent years, disruptions to Dannevirke’s water supply have caused increasing frustration, and rightfully so. Possible leakage of the Dannevirke Impounded Supply (often referred to as the ‘dam’ or ‘reservoir’) was detected in May 2021. Initial inspections and repairs to the liners were carried out, but loss of water from the Impounded Supply continued.

In September 2022, Council approved approximately $1.1 million to plan for permanent repairs and functional improvements to the Impounded Supply. Council hired a program manager as part of this, to oversee planning, construction, and coordination with suppliers for Dannevirke’s water supply amidst ongoing challenges.

To successfully fix the current issues with the water supply, Council needs to consider several issues including:

  • Installing a pre-treatment facility to minimise the risk of water quality issues and associated boil water notices when the Tamaki River is dirty,
  • additional water storage, to minimise the risk of water supply issues and associated restrictions when the Tamaki River is in low flows
  • additional water sources
  • replacement of the dam cover
  • repairs to the dam liner and underlying ground and drains
  • installation of the required monitoring gear
  • resolving the current hydraulic issues
  • meeting additional legislative requirements, following adoption of the new Building (Dam Safety) Regulations 2022.

At the end 2022/23 financial year, Council staff submitted a report to Council regarding the possible options for the course of action with initial estimates for the project between $18m to $20m (not included in the proposed Annual Plan). Additional information was requested by your Council, and this will assess the various options, taking into account factors such as cost, impact to water service delivery, timeframes, and cultural considerations. Consultation with the community is planned following this additional information going to Council.

Stay tuned for more information and consultation later this year...

To be consulted on later in 2023...

It is all too easy to take water for granted. After all, getting clean, reliable drinking water is as easy as turning on a tap, that is, until things go wrong. It is often only when failures occur that we are reminded of how much we take our access to safe drinking water for granted.

In recent years, disruptions to Dannevirke’s water supply have caused increasing frustration, and rightfully so. Possible leakage of the Dannevirke Impounded Supply (often referred to as the ‘dam’ or ‘reservoir’) was detected in May 2021. Initial inspections and repairs to the liners were carried out, but loss of water from the Impounded Supply continued.

In September 2022, Council approved approximately $1.1 million to plan for permanent repairs and functional improvements to the Impounded Supply. Council hired a program manager as part of this, to oversee planning, construction, and coordination with suppliers for Dannevirke’s water supply amidst ongoing challenges.

To successfully fix the current issues with the water supply, Council needs to consider several issues including:

  • Installing a pre-treatment facility to minimise the risk of water quality issues and associated boil water notices when the Tamaki River is dirty,
  • additional water storage, to minimise the risk of water supply issues and associated restrictions when the Tamaki River is in low flows
  • additional water sources
  • replacement of the dam cover
  • repairs to the dam liner and underlying ground and drains
  • installation of the required monitoring gear
  • resolving the current hydraulic issues
  • meeting additional legislative requirements, following adoption of the new Building (Dam Safety) Regulations 2022.

At the end 2022/23 financial year, Council staff submitted a report to Council regarding the possible options for the course of action with initial estimates for the project between $18m to $20m (not included in the proposed Annual Plan). Additional information was requested by your Council, and this will assess the various options, taking into account factors such as cost, impact to water service delivery, timeframes, and cultural considerations. Consultation with the community is planned following this additional information going to Council.

Stay tuned for more information and consultation later this year...

Page last updated: 27 Apr 2023, 10:55 AM