Skip to content
SES - NSW State Emergency Service NSW Government - Office of Environment and Heritage

NSW Flood Data Portal

Flood study

Nundle and Woolomin Flood Study and Floodplain Risk Management Study and Plan

The study area consists of the small township of Nundle and the village of Woolomin within the Tamworth Regional Council Local Government Area. Nundle is located on the right bank of the Peel River about 45 kilometres south-east of Tamworth. Woolomin is located on the right bank of the Peel River at its junction with Duncans Creek about 32 kilometres south-east of Tamworth. River flows at Nundle are unregulated, but Peel River flows at Woolomin have been regulated by Chaffey Dam since its construction in 1979. The dam comprises an earth and rockfill embankment and a concrete lined morning glory spillway, and has an existing water supply capacity of 62 GL. With a growing understanding of the risk posed by extreme floods, interim works involving a 1.8m parapet wall were completed in 2004, and an auxiliary spillway was completed in 2011.

The principal outcomes of this study include:

  • Consultation with the Nundle and Woolomin communities (Chapter 3);
  • Preparation of a Flood Study which defines flood behaviour in the Peel River and tributaries at Nundle and Woolomin, for the 20 year, 50 year and 100 year average recurrence interval (ARI) events and the probable maximum flood. The November 2000 flood is estimated as about a 100 year ARI event at Nundle and about a 20 year ARI event at Woolomin. A sensitivity test was also conducted to assess the potential impacts of climate change (Chapter 4);
  • Definition of the flood problem by construction of a property database, which records information on existing potentially flood affected properties within the study area up to the PMF. Some 10 dwellings in Nundle and 37 dwellings in Woolomin are expected to be flooded above floor level in the 100 year flood. The average annual cost of flood damages is assessed as $130K for Nundle and $270K for Woolomin (Chapter 5);
  • A detailed evaluation of potential floodplain management measures to reduce flood damages to existing and future development, including flood mitigation dams, levees, a bypass channel, creek clearing, voluntary house purchase, voluntary house raising or redevelopment, infrastructure protection, planning controls, improvements to the flood warning system, improvements to emergency management capability and plans, and improvements to public flood readiness (Chapter 6);
  • A recommended Floodplain Risk Management Plan (FRMP) (Chapter 7).

Additional Information

Field Value
Title Nundle and Woolomin Flood Study and Floodplain Risk Management Study and Plan
Publication Date 1 May 2012
Themes Land and Resource Management
Spatial Extent
Map data © OpenStreetMap contributors
Council/LGA Tamworth Regional Council
Author/ Prepared by Bewsher Consulting
Publish date 30 May 2019
Update date 27 June 2019
River Basin 419 - Namoi
Approval State Approved
Submitted for approval 30 May 2019
Submitted by Akhil Sud
Approved 27 June 2019
Approved by dstazic
Identifier fa0e287b-8ac9-43ea-a9d3-86d7886ca25b