Review of the Narromine Floodplain Risk Management Study and Plan

Narromine Shire Council has engaged consultants to undertake a review of the Narromine Floodplain Risk Management Study and Plan which was prepared for the township in 2009.The purpose of the review is to assist Council in refining strategic plans for mitigating and managing the effects of existing flood risk (associated with existing development on flood prone land), future flood risk (associated with any new development on flood prone land) and continuing flood risk (the risk remaining in both existing and future development areas after floodplain risk management measures are implemented).

The review is jointly funded by Council and the NSW Department of Planning, Industry and Environment and aims to build community resilience towards flooding through informing better planning of development, emergency management and community awareness. Council has established a Floodplain Risk Management Committee which is comprised of relevant council members, state government agencies and community representatives.

The review will utilise the results of the Narromine River Bank Levee Feasibility Study which was completed in 2013. Figure 1 attached shows the indicative extent of the 1 in 100 year flood on the Macquarie River at Narromine under present day conditions as defined by this study.

A brief summary of the floodplain risk management measures which form the Narromine Floodplain Risk Management Plan (2009), including their estimated cost is provided below, while an electronic copy of the Narromine Floodplain Risk Management Study and Plan (2009) and Narromine River Bank Levee Feasibility Study (2013) can be found below.

Please note the documents below are large documents over 25MB each. They will take some time to download. 

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Floodplain Management Measures Forming the Narromine Floodplain Risk Management Plan (2009)

Option  Estimated Cost  Priority Assigned to Implementation of Measure  Status of Measure 
PM1 – Implement the recommended development controls based on draft Flood Policy for Narromine.  Council staff’s Cost  High  Implemented 
RM1 – Ensure flood data in this Floodplain Risk Management Study and draft Plan is available to NSW SES for inclusion in flood emergency response.  Council and NSW SES Costs  High  Implemented 
RM2 – Implement flood awareness and education program for residents and owners of commercial and industrial developments.   NSW SES and Property/Business Owner Costs  High  Implemented 
FM1 – Feasibility Study of river bank levee.(1,2)  $80,000(1)  High  Completed 
FM2 – Preparation of detailed design and construction of levee (dependent on the results of the above study).  $1.6 Million(3)  Medium  Yet to be commenced 
 FM3 – Feasibility Study of upgrading the hydraulic capacity of culverts beneath the Parkes Narromine Railway.(4) $50,000(3)  Medium  Yet to be commenced 
FM4 – Prepare detailed design and construct culvert works (scheme is dependent on the results of the above study and whether river bank levee scheme is implemented. The river levee would reduce ponding upstream of the railway and possibly reduce the need for improved culverts).(4)  $0.8 Million(3)  Medium  Yet to be commenced 
Total Cost of Implementing Flood Mitigation Measures FM1, FM2, FM3 and FM4  $2.53 Million(3)     

1. FM1 was completed in 2013. The results of the study are presented in Narromine River Bank Levee Feasibility Study (2013)

2. Scope of floodplain risk management measure refined as part of Narromine River Bank Levee Feasibility Study (2013) and the Narromine Town Levee Concept Design (2016).Figure 1 shows the currently proposed alignment of the river bank levee.

3. Following the adoption of the revised Plan, Narromine Shire Council can seek funding from the NSW State Government under its Floodplain Management Program to cover the majority of the cost of implementing the recommended set of measures.

4. Refer Figure 1 for location of the proposed upgraded culverts.

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