Ngongotahā Flood Review Project

The Ngongotahā Flood Review Project is a joint Rotorua Lakes Council and Bay of Plenty Regional Council programme of action to implement the 24 recommendations of an Independent Review Panel relating to the Ngongotahā flood event of 29 April 2018.

The programme of work covers six areas:

  • Clarification of roles and responsibilities
  • Stream repairs and maintenance
  • Engineering, modelling and options
  • Civil defence and readiness
  • RMA planning and consents
  • Upper catchment considerations

Each area relates to a cluster of recommendations within the Panel's report.

The Independent Review Panel report can be accessed here.

Up to date information is available here

The Ngongotahā Flood Review Project is a joint Rotorua Lakes Council and Bay of Plenty Regional Council programme of action to implement the 24 recommendations of an Independent Review Panel relating to the Ngongotahā flood event of 29 April 2018.

The programme of work covers six areas:

  • Clarification of roles and responsibilities
  • Stream repairs and maintenance
  • Engineering, modelling and options
  • Civil defence and readiness
  • RMA planning and consents
  • Upper catchment considerations

Each area relates to a cluster of recommendations within the Panel's report.

The Independent Review Panel report can be accessed here.

Up to date information is available here

  • Ngongotahā Action Plan workstream update

    28 days ago

    The Ngongotahā Flood Review (NFR) project is aimed at reducing the risk and impact of future storm events in Ngongotahā. The Ngonogtahā Action Plan was developed by the Rotorua Lakes Council, Bay of Plenty Regional Council, the Community Reference Group and the wider community to achieve the project objectives.

    The NFR project is split into five work streams. Each one has objectives based on recommendations made by the Independent Flood Review Panel. Here’s a snapshot of what’s been completed since our last update in July.

    Stream repairs and maintenance

    • A detailed work programme has been developed for the next 12...

    The Ngongotahā Flood Review (NFR) project is aimed at reducing the risk and impact of future storm events in Ngongotahā. The Ngonogtahā Action Plan was developed by the Rotorua Lakes Council, Bay of Plenty Regional Council, the Community Reference Group and the wider community to achieve the project objectives.

    The NFR project is split into five work streams. Each one has objectives based on recommendations made by the Independent Flood Review Panel. Here’s a snapshot of what’s been completed since our last update in July.

    Stream repairs and maintenance

    • A detailed work programme has been developed for the next 12 months that includes general vegetation maintenance and planting, repairs to erosion sites, maintenance to overflow paths. A stream maintenance plan is also being prepared to include scheduling for inspections and maintenance standards.
    • A community planting day was held on August 24 with one thousand grasses and sedges planted along the Ngongotahā Stream.

    Engineering, modelling and options

    • The list of flood mitigation options has been reduced from 12 to 6. Modelling will soon commence to find out whether these options (by themselves or combined) will be effective.

    Civil defence and readiness

    • A Community Response Plan is in development for Paradise Valley. The focus has been on bringing residents together to form a working group for initial development of a plan.
    • On-going discussions are being had with various groups and individuals within Ngongotahā to encourage participation in developing a plan for Ngongotahā community.
    • A recent survey highlighted that just over half of those surveyed in affected areas in Ngongotahā and Paradise Valley did not have a family emergency plan or emergency kit prepared.
    • The Ngongotahā Stream Emergency Resilience and Evacuation Plan is available for consultation by the community.

    RMA planning and consents

    • We’ve reviewed the Engineering Code of Practice. Council is intending to adopt and adapt Waikato Regional Council’s Regional Infrastructure Technical Specifications (RITS).
    • Scoping is underway to review Council's 'rule book' (District Plan) to identify potential improvements regarding development near flood-risk areas.

    Upper catchment considerations

    • A drone survey was completed for the Taurangamiromiro Stream from Relph Road to the Lion Park.
    • Water quality monitoring has commenced at 9 sites and on-going monitoring will occur monthly over the next 12 months.
    • Large tree removal at Taurangamiromiro Stream to commence in October.
    • Future work – further surveillance and maintenance planning of the stream from the Lion Park down to SH5.
    • Continuing to work with landowners interested in land use change and riparian protection

    Clarification of roles and responsibilities

    • BOPRC and RLC signed an MOU in July clarifying their respective roles and responsibilities relating to the maintenance of Ngongotahā Stream.
    • Next steps involve building awareness of frontline staff.

    Connecting the Ngongotahā Community

    • Meetings have been held with local community groups to share what we've been doing.
    • Two planting days were held on the 2nd & 24th of August
  • Ngongotahā Community Reference Group

    by Amoran, 5 months ago

    As part of this project a Community Reference Group has been formed to assist both councils to collaborate and effectively connect with the affected community and iwi, and to ultimately ensure that any action plan options chosen, are balanced, practical, affordable, deliver the risk reduction that the local people need and don't create new issues or flooding

    The Community Reference Group will perform and support the following:

    • Filter/narrow down the flood reduction/mitigation options that are realistic, pragmatic, appropriate and acceptable to the Ngongotahā catchment community
    • Assist interpreting and communicating flood modelling and mitigation options so they are understandable...

    As part of this project a Community Reference Group has been formed to assist both councils to collaborate and effectively connect with the affected community and iwi, and to ultimately ensure that any action plan options chosen, are balanced, practical, affordable, deliver the risk reduction that the local people need and don't create new issues or flooding

    The Community Reference Group will perform and support the following:

    • Filter/narrow down the flood reduction/mitigation options that are realistic, pragmatic, appropriate and acceptable to the Ngongotahā catchment community
    • Assist interpreting and communicating flood modelling and mitigation options so they are understandable to the wider public
    • Being a conduit for BOPRC & RLC to connect with the wider community
    • Assisting in engagement with the wider community on the proposed programme of works and help in seeking wider community input

    More information on the Community Reference Group and the role here.


  • Project Background

    5 months ago
    Following a significant rain event on 29 April 2018, the Ngongotahā Stream overtopped its banks and flooded parts of the Ngongotahā township near Rotorua. The Rotorua Lakes Council and Bay of Plenty Regional Council have worked together since then, alongside other agencies, to assist the community to recover from this event. The councils commissioned an independent review of the flood event to understand the cause of the flooding and how similar flood impacts may be avoided in the future. This report was presented to the councils’ elected members on 10 December 2018.

    To facilitate the implementation of the 24 recommendations...

    Following a significant rain event on 29 April 2018, the Ngongotahā Stream overtopped its banks and flooded parts of the Ngongotahā township near Rotorua. The Rotorua Lakes Council and Bay of Plenty Regional Council have worked together since then, alongside other agencies, to assist the community to recover from this event. The councils commissioned an independent review of the flood event to understand the cause of the flooding and how similar flood impacts may be avoided in the future. This report was presented to the councils’ elected members on 10 December 2018.

    To facilitate the implementation of the 24 recommendations of the Independent Review of the Ngongotahā Flood Event report, four senior managers of the two councils will jointly lead a series of actions over coming months. They have appointed an independent project management expert , to ensure the key work streams are identified, evaluated, sequenced and stay on task. That progress with each workstream is well communicated.

    A key recommendation of the four senior managers was to form a Community Reference Group who can assist the councils to collaborate and effectively connect with the affected community and iwi, and to ultimately ensure that any structural works option chosen, are balanced, practical, affordable and deliver the risk reduction that the local people need.

  • Ngongotahā flood event

    by Amoran, 5 months ago

    On Sunday 29 April 2018, the Rotorua district was subject to a severe weather event. The rainfall depth over a six-hour period in the areas around the Ngongotahā catchment reached 145mm, with 62.5mm of rain falling in one hour.

    The Ngongotahā Stream reached its highest recorded level and overflowed its banks in several places. While flooding occurred throughout the Rotorua district, the Ngongotahā catchment experience was extreme and resulted in floodwaters inundating many homes and several businesses. Over that time 38 houses were declared insanitary and required extensive repair work. Some businesses were closed for days while they undertook repairs.

    ...

    On Sunday 29 April 2018, the Rotorua district was subject to a severe weather event. The rainfall depth over a six-hour period in the areas around the Ngongotahā catchment reached 145mm, with 62.5mm of rain falling in one hour.

    The Ngongotahā Stream reached its highest recorded level and overflowed its banks in several places. While flooding occurred throughout the Rotorua district, the Ngongotahā catchment experience was extreme and resulted in floodwaters inundating many homes and several businesses. Over that time 38 houses were declared insanitary and required extensive repair work. Some businesses were closed for days while they undertook repairs.

    More information about the Flood Recovery can be found here.

  • Work completed to date

    by Amoran, 5 months ago
    Remedial works

    In the weeks and months following the flood, both Councils faced significant repairs to infrastructure.

    This included stopbanks, roading and stormwater network as well as the banks of the Ngongotahā Stream.


    In the weeks and months following the flood, both Councils faced significant repairs to infrastructure.

    This included stopbanks, roading and stormwater network as well as the banks of the Ngongotahā Stream.