Upper Nogoa and Mackenzie River Catchments Flood Study

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There are many areas impacted by flood across the Isaac Region. Isaac Regional Council is continuing to work towards understanding our flood risk better to improve the resilience of our communities and the availability of flood information to our community.

Each flood event is different. The rain falls in different locations and at different intensities. What happened in the last flood will not necessarily be replicated in the next flood. However, with each flood event we can better prepare the community through more accurate predictive modelling of future flooding.

Council’s Flood Study Program seeks to improve our understanding of the flood risks to our communities in order to manage risk and support emergency preparedness and infrastructure planning.

UPPER NOGOA AND MACKENZIE RIVER CATCHMENTS FLOOD STUDY

Council has engaged engineering consultants KBR to prepare the flood study which is being funded with support from the Queensland Resilience Authority program, ‘Disaster Recovery Funding Arrangements: Flood Risk Management’.

The flood study focuses on understanding flood hazards across the study area under existing and projected climate conditions for several key rainfall events. The results of the study will provide a better understanding of the flood risk posed to property and people and will support the improved management of these risks in the future.

The study was commissioned in October 2025 and is currently public consult phase until the 21 August 2026.

The Fact Sheet: Upper Nogoa / Mackenzie River Catchments Flood Study is attached for your information.

To View the Flood Study

The Study

A copy of the Upper Nogoa and Mackenzie River Catchments Hydraulics Flood Study is attached to this page

Mapping

The flood events modelled be viewed under the flood study tab in council’s online mapping service at https://www.isaac.qld.gov.au/Residents/Planning-and-Development/Online-Mapping.

The online mapping service allows you to search your property and view any potential flood hazards as produced by this flood study. You are also able to view whether your property is currently identified as being impacted by flood hazards in accordance with the Isaac Regional Planning Scheme Flood Plain Hazard Overlay.

The review resulted in minor changes to the flood extent modelled in the 2024 Clermont Flood Study, as summarized below:

  • Minor changes have been made to the previously adopted flood modelling, with modelled flood impacts increasing for some properties and decreasing for others.
  • The study area has been expanded to include rural and rural residential land on the western edge of Clermont, west of the racecourse along Clermont–Alpha Road and Alpha Bypass Road.

PUBLIC CONSULTATION

Feedback on the Flood Study can be provided in the following ways until the 21 August 2026.

  • A hard copy of the flood study can be viewed at the Clermont and Middlemount Libraries
  • Email at liveability.sustainability@isaac.qld.gov.au(External link)
  • Telephone on 1300 472 227
  • To discuss your experience in-person please contact the project team via the above methods to arrange an appointment.

HOW CAN YOU HELP?

Did you know that you can help Council with our flood planning? Council is seeking any information that property owners or stakeholders may have about historic flood events throughout the study area.

Specifically, we would love to hear from you if you took any photos, made a flood marker of have a rain gauge that recorded flooding within the study area. This kind of information will help by providing inputs into modelling to ensure that the calibration of our flood modelling is as accurate as possible.

Information can be provided in the following ways:

  • By completing the survey at the bottom of the page

There are many areas impacted by flood across the Isaac Region. Isaac Regional Council is continuing to work towards understanding our flood risk better to improve the resilience of our communities and the availability of flood information to our community.

Each flood event is different. The rain falls in different locations and at different intensities. What happened in the last flood will not necessarily be replicated in the next flood. However, with each flood event we can better prepare the community through more accurate predictive modelling of future flooding.

Council’s Flood Study Program seeks to improve our understanding of the flood risks to our communities in order to manage risk and support emergency preparedness and infrastructure planning.

UPPER NOGOA AND MACKENZIE RIVER CATCHMENTS FLOOD STUDY

Council has engaged engineering consultants KBR to prepare the flood study which is being funded with support from the Queensland Resilience Authority program, ‘Disaster Recovery Funding Arrangements: Flood Risk Management’.

The flood study focuses on understanding flood hazards across the study area under existing and projected climate conditions for several key rainfall events. The results of the study will provide a better understanding of the flood risk posed to property and people and will support the improved management of these risks in the future.

The study was commissioned in October 2025 and is currently public consult phase until the 21 August 2026.

The Fact Sheet: Upper Nogoa / Mackenzie River Catchments Flood Study is attached for your information.

To View the Flood Study

The Study

A copy of the Upper Nogoa and Mackenzie River Catchments Hydraulics Flood Study is attached to this page

Mapping

The flood events modelled be viewed under the flood study tab in council’s online mapping service at https://www.isaac.qld.gov.au/Residents/Planning-and-Development/Online-Mapping.

The online mapping service allows you to search your property and view any potential flood hazards as produced by this flood study. You are also able to view whether your property is currently identified as being impacted by flood hazards in accordance with the Isaac Regional Planning Scheme Flood Plain Hazard Overlay.

The review resulted in minor changes to the flood extent modelled in the 2024 Clermont Flood Study, as summarized below:

  • Minor changes have been made to the previously adopted flood modelling, with modelled flood impacts increasing for some properties and decreasing for others.
  • The study area has been expanded to include rural and rural residential land on the western edge of Clermont, west of the racecourse along Clermont–Alpha Road and Alpha Bypass Road.

PUBLIC CONSULTATION

Feedback on the Flood Study can be provided in the following ways until the 21 August 2026.

  • A hard copy of the flood study can be viewed at the Clermont and Middlemount Libraries
  • Email at liveability.sustainability@isaac.qld.gov.au(External link)
  • Telephone on 1300 472 227
  • To discuss your experience in-person please contact the project team via the above methods to arrange an appointment.

HOW CAN YOU HELP?

Did you know that you can help Council with our flood planning? Council is seeking any information that property owners or stakeholders may have about historic flood events throughout the study area.

Specifically, we would love to hear from you if you took any photos, made a flood marker of have a rain gauge that recorded flooding within the study area. This kind of information will help by providing inputs into modelling to ensure that the calibration of our flood modelling is as accurate as possible.

Information can be provided in the following ways:

  • By completing the survey at the bottom of the page

  • Flood Survey

    Did you know that you can help Council with our flood planning? As a landholder in the study area, Council is seeking any information you may have about historic flood events throughout the study area.

    Specifically, we would love to hear from you if you took any photos, made a flood marker, or have a rain gauge that recorded flooding within the study area. This kind of information will help by providing inputs into modelling to ensure that the calibration of our flood modelling is as accurate as possible.

    If you have access to any information that you believe may be able to assist, you are encouraged to undertake the survey within.

    Take Survey
    Share Flood Survey on Facebook Share Flood Survey on X (formerly Twitter) Share Flood Survey on Linkedin Email Flood Survey link
Page last updated: 10 Aug 2026, 10:55 AM