Flood Study Program
To date flood studies have been undertaken or are in progress for the following locations:
- Isaac River catchment - the Isaac River Flood Study was undertaken by KBR and completed in 2021. It covers a large rural area in central Isaac, west of the Connors Range.
- Clermont - the Clermont, Flood Model and Hazard Mapping Study was delivered by GHD in 2023 covers the town of Clermont and its immediate rural areas. Note: Superseded by Upper Nogoa (Clermont) 2026.
The below image(PNG, 69KB) shows the extent of flood impacted land (probable maximum flood areas) across the Isaac Region and the relevant flood studies that have been undertaken across these areas. Council will continue to review the extent of our Flood Program in the future.
Upper Nogoa and Mackenzie River Catchments Flood Study
Upper Nogoa and Mackenzie River Catchments FloodStudy
Including Upper Nogoa (Clermont)
Date of Issue: August 2026
Consultant: Kellog Brown Root (KBR)
Grant Assistance: Queensland Resilience Authority program, ‘Disaster Recovery Funding Arrangements: Flood Risk Management’.
Communities: Clermont and Middlemount
Water Courses:
- Nogoa River – Theresa Creek, Sandy Creek, Wolfgang Creek
- Mackenzie River – Oaky Creek, Ropert Creek, Cooroora Creek and Honeycombe Creek
View the Upper Nogoa and Mackenzie River Catchments Hydraulics Flood Study >> Upper-Nogoa-and-Mackenzie-River-Catchments-Hydraulics-Flood-Study_1.pdf(PDF, 96MB)
View the Study Area(PDF, 700KB)
View interactive flood mapping online >> Public > Flood Mapping (Online)
Styx River and Plane Creek South Flood Study
Styx River and Plane Creek South Flood Study
Date of Issue: May 2024
Consultant: Kellog Brown Root (KBR)
Grant Assistance: Preparing Australian Communities – Local Stream (Federal Government)
Communities: St Lawrence, Clairview, Flaggy Rock, Ilbilbie, Carmila, Greenhill
Water Courses:
- Styx River with Tooloombah Creek, Deep Creek, Wangrabry Creek and Wellington Creek
- St Lawrence Creek with Connie Creek and Freshwater Creek
- Waverley Creek with Amity Creek
- Clairview Creek with Middle Creek, Colabash Creek and Cattle Creek
- Plane Creek South sub basin includes Marion Creek, Stony Creek, Gillinbin Creek, West Hill Creel, Spider Creek, Carmila Creek, Flaggy Rock Creek, Oaky Creek and Dry Creek
View the Styx River and Plane Creek South Flood Study(PDF, 192MB)
View the Study Area(JPG, 3MB)
View interactive flood mapping online
