Floodplain management grants 2016–17

The funding for these projects comes the NSW Government Floodplain Management Program

Albury City Council

South Albury levee upgrade – feasibility study

The South Albury levee protects a significant residential and industrial area from flooding. Under existing conditions, the levee would overtop in a 100 year average recurrence index event and cause inundation of approximately four and a half square kilometres of urban landscape. Upgrade of this levee will improve flood protection for the area.

Bega Valley Shire Council

Towamba River, Lake Curalo and Twofold Bay flood study at Towamba and Eden

This study aims to quantify the flood risk in and around the Eden and Towamba communities for both inundation and emergency response. A complete catchment hydrologic model with detailed hydraulic models at Eden, Towamba, Rocky Hall, Twofold Bay fringe (including Lake Curalo and its tributaries) will be developed.

Blue Mountains City Council

Bullaburra to Linden floodplain risk management study and plan

Council will undertake the floodplain risk management study and plan for the study catchment of Bullaburra to Linden. The objective of the proposed study is to undertake a floodplain risk management study for prioritised catchments within the Glenbrook – Erskine Catchment to reduce the danger of flood damage to property and to personal safety and ensure that future development is controlled in a manner compatible with the flood risk.

Carrathool Shire Council

Hillston riverbank stabilisation feasibility study

This project aims to identify areas along the river bank at Hillston (which are adjacent to the Lachlan Street levee bank) that are in need of stabilisation. The previous Hillston floodplain risk management study identified particular sections of the river bank that were in need of stabilisation due to erosion from past floods. This project will identify and assess these erosion areas and develop options for their stabilisation. This project is necessary to ensure the ongoing stability of the newly upgraded levee.

Central Coast Council

Killarney Vale/Long Jetty catchments floodplain risk management study and plan

Following the Killarney Vale/Long Jetty catchments overland flood study, Council intends to undertake a comprehensive floodplain risk management study and plan. The plan will guide land use planning, development control and prioritise critical trunk drainage infrastructure for upgrade.

Northern Lakes floodplain risk management study and plan

Following the Northern Lakes flood study in 2015, Council intends to undertake a floodplain risk management study and plan. The plan will guide land use planning, development control and prioritise critical trunk drainage infrastructure for upgrade.

Cessnock City Council

Greta – flood study

This project will provide Cessnock City Council, Office of Environment and Heritage and State Emergency Service with up to date flooding information by replacing existing flood information with a new two dimensional model and associated report and flood level survey. Newly available LiDAR data will accelerate the process of updating the flood study for this area of Greta, which experienced severe storm damage in the April 2015 storm event.

South Cessnock – investigation and design earth bund structure

This project is the priority outcome determined in the recent flood risk management study and plan completed and adopted by Cessnock City Council. It will provide a design for construction of an earth bund to protect properties in South Cessnock. This part of the catchment had 20 properties that suffered flooding in storm events between the 5 and 20 average recurrence interval events.

Voluntary house raising scheme – Abermain-Weston

This project will provide protection to properties currently vulnerable in lower category storm events (5–10% annual exceedance probability) in the Swamp Creek catchment, where damage is quite extensive and there is a growing cost to the community.

Voluntary house raising scheme – Cessnock

This project aims to reduce flood damage to property in the area of South Cessnock where up to 20 properties suffer flooding in storm events from 5–20 year average recurrence index. Suitable properties will be able to apply for mitigation assistance through this scheme.

Fairfield City Council

Cabravale overland flood study

The Cabravale catchment is located in the south eastern part of the Fairfield local government area and covers over 11 square kilometres. There are approximately 10,000 properties within this catchment. A preliminary hydraulic analysis identified at least 293 properties in this catchment to be affected by 1 in 100 year flood and it has been recommended that a detailed study to be undertaken.

This overland flood study will provide a detailed analysis of this catchment that will enable quantification of the flooding behaviour, flood risk precincts and notations on parcels for S149 planning certificates.

Prairiewood detention basin upgrade feasibility study and detailed design

The Three Tributaries Floodplain Risk Management Study and Plan project has identified the safety and performance of Council's flood detention basins (including the Prairiewood basin) as an issue. Specifically, the Prairiewood basin will overtop and potentially fail in floods above and including the 20 year average recurrence index event, posing risk to people and properties downstream. This project will investigate the feasibility of the basin upgrade, including increasing the basin capacity or increasing the basin embankment height, and progress to detailed design if a feasible option is identified.

Smithfield West floodplain risk management study and plan

Smithfield West is located on the northern side of the Fairfield local government area and covers one and a half square kilometres. Overland flooding in this catchment has been documented on a number of occasions and has caused damage to properties. This floodplain risk management study and plan will identify flood mitigation options to reduce risk to life and damage to properties.

Georges River Council

Hurstville local government area – floodplain risk management study and plan

The Hurstville local government area floodplain risk management study and plan seeks to identify and develop strategies including engineering solutions and actions to minimise potential risks and reduce the impact of flooding within the Hurstville local government area.

Griffith City Council

Mirrool Creek flood warning system and emergency breaching protocol

The proposed project involves installation of flood warning devices at Barellan Road Bridge and Yenda East Mirrool regular site; integration of the flood warning system into the Bureau of Meteorology's flood forecasting system; and detailed hydrological modelling to formalise an emergency breaching protocol of Main Canal during major flood events.

The flood warning system at Barellan Road Bridge will provide one to two days flood warning time for Yenda residents, and the emergency breaching protocol will provide certainty and confidence about the timing to breach the Main Canal during major flood events.

Yenda East Mirrool Regulator Lawson Siphon – investigation and detailed design

Yenda East Mirrool Regulator Lawson Siphon is located east of Yenda at East Mirrool regular site where currently Mirrool Creek flows are transferred under the Main Canal by means of a siphon structure. The siphon structure has only 5% annual exceedance probability capacity, and in larger rain events, Mirrool Creek flooding overtops the embankments of Northern Branch Canal and floods the townships of Yenda, North Yenda and Myall Park.

The main objectives of the project is to investigate the geotechnical and environmental factors, and detailed design of a siphon system that allows at least one percent annual exceedance probability Mirrool Creek flow without constriction, and at the same time meet the irrigation water supply requirements of the Main Canal. The project will also require detailed design of a temporary by-pass system as the supply of the Main Canal cannot be interrupted.

Yoogali McCormack Road levee and DC605J culvert upgrade

The project involves detailed design and environmental and geotechnical investigation of a levee along the northern side of McCormack Road and western side of Main Drain J between McCormack Road and Griffith–Yanco Rail line, and upgrade of culverts at Yenda Road and Bosanquet Road at Yoogali.

Inner West Council

Hawthorne Canal floodplain risk management study and plan

The floodplain risk management study and plan will identify and compare flood management options, including an assessment of social, economic and environmental impacts. The plan aims to reduce flood hazard and risk to people and property in the existing community and to ensure future development is controlled with consideration of flood hazard and risk. The plan will be used for sub-catchment management planning.

Kempsey Shire Council

Macleay rural voluntary house raising – stage two

The Macleay rural voluntary house raising program involves working with property owners on the lower Macleay River floodplain to assist them with the raising of houses which are at a high risk due to flooding.

In 2008, the Lower Macleay Flood Damages Assessment Report identified and prioritised houses within the Lower Macleay Floodplain Risk Management Plan based on a survey of dwellings. Council will offer property owners identified in the report the opportunity to participate in the scheme in order of the identified risk for the dwelling.

Ku-ring-gai Council

Lovers Jump Creek flood risk management study and plan

The Lovers Jump Creek Catchment area is one of Ku-ring-gai's most significantly flood affected areas with ridge top development and steep terrain contributing to significant flood risk arising from flash flooding along overland flow paths and streams in the area. The nature of the flash flooding hazard is significant in the speed with which it occurs, leaving little to no time to implement damage reduction controls or evacuate.

Council will prepare a flood risk management study and plan. The study and plan will develop appropriate management actions to reduce flooding across the catchment.

Kyogle Council

Tabulam Village floodplain risk management study and plan

The village of Tabulam is flood prone and major flooding has impacted on the village and its residents in the past. Development of the Tabulam floodplain risk management study and plan will assist in identifying the way to manage the risk of flooding impacts within the village area. This will provide guidance for the control measures required for the existing developed area and identify risks involved in new development. Beneficial control measures will be identified and implemented.

Lake Macquarie City Council

Swansea local adaptation and flood preparedness plan

Swansea is one of the Lake Macquarie City Council communities most affected by lake flooding. With projected sea level rise, its vulnerability will increase, exacerbated by tidal inundation and rising groundwater. More than 1594 residential and commercial properties are affected, as well as community centres, emergency response stations and infrastructure such as, water, sewer, roads, sporting fields and drains.

Lake Macquarie City Council will work with the community to develop a planning strategy to reduce the current and future risk, along with a works program and emergency flood management for the next decade. The project will assess the long-term cost and feasibility of maintaining key infrastructure, and consider the practical options for modification, protection and retreat options.

Voluntary house raising scheme – Lake Macquarie foreshore

The project will offer an incentive for voluntary house raising of up to $30,000 for at least three homes per annum over three years in low-lying areas around the foreshores of Lake Macquarie affected by lake flooding and sea level rise. Priority will be given to homes with floors below frequent floods (10 year average recurrence index). Council will seek to intervene at times of minor renovations, sale to a new owner, or in areas undergoing local adaptation planning to take advantage of raised awareness by owners and the convenience of the timing.

Liverpool City Council

Liverpool overland flow path study for rural catchment areas

The precincts of Austral, Leppington North and East Leppington are the latest areas in the Liverpool local government area for residential developments. The proposed development will transform the current rural landform into urban residential precincts. The State Emergency Services has raised concerns of overland flooding in this area. The project will involve undertaking an overland flow path study of the rural catchment with two dimensional TUFLOW model with finer model resolution.

Moorebank voluntary acquisition scheme

The scheme involves progressive acquisition of 175 properties within the floodway of the Georges River, in the vicinity of Rickard Road and Newbridge Road, Chipping Norton. To date Council has purchased 116 properties. The remaining 59 properties are required to be purchased to complete the scheme.

This project plans to purchase two properties at 36 and 38 Rickard Road, Chipping Norton. Following purchase, all structures from the property will be removed and the site will be converted into open spaces.

Lockhart Shire Council

Government dam upgrade/levee – Lockhart

This project involves the construction/upgrade of a levee and diversion channel in the vicinity of the government dams at the Lockhart North Common as well as land to the north east of the town. The levee will protect the adjoining south side residential areas from Brookong Creek flooding. The design is for an approximately 850 metre levee, with 30 metre spillway to discharge into Brookong Creek, as well as a 395 metre diversion channel to the north east. The number of residential and commercial properties flooded over floor is expected to be reduced by 22. In addition to this, many regions that are currently flood affected are expected to become flood free, thus reducing the number of flood affected lots by 75.

Maitland City Council

Flood study for the Lochinvar Creek

Maitland has a high population growth rate which adds to development pressures, resulting in the need for a better understanding of the floodplains. This project involves undertaking a detailed flood study. The study will focus on the local catchments of the Lochinvar Creek for two-three dimensional models. This study will enable a better understanding of the implications of local and regional run-off, particularly in relation to flash flooding. The study will also incorporate flood mapping for floods up to a Probable Maximum Flood.

Flood study for the Wallis, Fishery and Swamp Creeks

This project involves undertaking a more detailed flood study in the local catchments of the Wallis, Fishery and Swamp creeks for two three dimensional models. This study will enable a better understanding of the implications of local and regional run-off, particularly in relation to flash flooding.

Mid-Coast Council

Karuah River and Stroud floodplain risk management study and plan

This floodplain risk management study and plan will provide the selected actions and strategic direction to allow progress on risk management and on ground works. In particular, flood planning levels will be produced to inform future development controls and flood response actions.

Manning River floodplain flood risk management study and plan

This project involves the preparation of floodplain risk management plan for the Manning River floodplain from downstream of Wingham to the coast including the township of Tinonee, Taree, Cundletown, Harrington and Manning Point and the adjacent rural and semi-rural area of the floodplain. This will help Council to improve its management of flood prone areas by reducing the impact of flooding and flood liability on individual land owners and occupiers of flood prone property, and reducing private and public losses resulting from floods. This study will identify various risk management options with cost benefit analysis, carry out required modelling for management options and community consultation.

Narrandera Shire Council

Review of Narrandera floodplain risk management study and plan

This project will review the Narrandera floodplain risk management study and plan that was completed in 2009. Council has undertaken a review/update of the hydraulic model for the Murrumbidgee River using accurate LiDAR information. This revised model determined that the design flood levels for Narrandera have changed and this information needs to be incorporated into a review of the Narrandera floodplain risk management study and plan.

Penrith City Council

Peachtree and Lower Surveyors Creeks flood study

This project will undertake a local overland flow flood study for the Peachtree and Lower Surveyors Creeks (tributaries of Nepean River) catchment area. The study area comprises the 12.5 square kilometres bounded by the M4 Motorway in the south and extend up to the confluence of Peachtree Creek and Nepean River. The study will define the flood behaviour under current floodplain conditions. All potential flooding mechanisms will be included in the analysis of flood behaviour including overland flow and creek flooding.

Port Macquarie–Hastings Council

Boundary Street flood access detailed design

The Hastings River floodplain risk management study and plan indicated the need to upgrade Boundary Street to a 1:20 year flood level of two and a half metre Australian height datum to provide improved evacuation for the community.

The road upgrade is also influenced by the capacity of the existing drainage corridor that links a small wetland area to the Hastings River floodplain. This drainage corridor crosses Boundary Street and it has been identified that it is necessary to formalise this corridor to minimise the impact of flooding. Raising the level of Boundary Street to the 20 year recurrence flood level would provide around 10 hours additional evacuation time during the 100 year annual recurrence flood event.

North Brother local catchments flood study

The project comprises a flood study of numerous unnamed local catchments stemming from the slopes of North Brother Mountain within the Camden Haven area. Urban developments located within the local catchments are at risk of flooding during rainfall events due to the nature of the local catchment characteristics, the nature and location of existing developments and due to the limited capacity of the urban drainage networks to cope with runoff events.

The aim of the project is to quantify the flood hazard to the community and ultimately lead to the instigation of a floodplain risk management study and associated management options in the future.

Queanbeyan–Palerang Regional Council

Finalisation of the Queanbeyan floodplain risk management study and plan

With the significant flood risk present in Queanbeyan central business district, Council aims to update and finalise the draft Queanbeyan floodplain risk management study and plan. This will provide Council and the community with a strategic plan to manage the public and private losses resulting from flood and assist Council to meet its statutory responsibilities.

Rockdale City Council

Bardwell Creek two dimensional flood study review

Council is seeking to undertake a two dimensional flood study review for the Bardwell Creek Catchment. The part of the catchment to be studied is restricted to those areas located within the Rockdale local government area. The study will include extents, velocities and flows for a range of flood events; hydraulic categories for the 1% annual exceedance probability and probable maximum flood events as a minimum; preliminary true hazard categorisation; flood emergency response classification of communities for the full range of flood events; preliminary residential flood planning level and flood planning area; the sensitivity of flood behaviour to changes in flood producing rainfall events due to climate change; and flood damages under existing condition.

Cadia Street branch management options – feasibility review

Council will undertake a review of the management options for stormwater infrastructure augmentation/enhancement in the Cadia Street branch of the Muddy Creek Drainage Catchment. The section of the Cadia Street branch to be studied is restricted to those areas of the branch upstream of Wolseley Street, Bexley.

Shellharbour City Council

Horsley Creek voluntary purchase scheme

The Horsley Creek voluntary purchase scheme aims to buy 14 houses and one unit block. The removal of these homes will remove the high risk to life that currently sits with the residents and their potential rescuers at these locations. The land, once restored, will be rezoned to a flood compatible use. This scheme has been identified in the draft Horsley Creek floodplain risk management study and plan as the only feasible option for these residents.

Shoalhaven City Council

Lower Shoalhaven River floodplain risk management study and plan review

The Lower Shoalhaven River floodplain risk management study and plan review will remodel this catchment which includes the townships of Nowra, Bomaderry, Shoalhaven Heads and Greenwell Point, in much finer resolution. It is hoped that new mitigation options will be identified and supported.

St Georges Basin floodplain risk management study and plan review

The St Georges Basin floodplain risk management study and plan review will remodel this catchment which includes the townships of St Georges Basin, Sussex Inlet, Sanctuary Point and Tomerong. The current model does not provide detailed flow behaviour within the townships. A two dimensional flood model will therefore be created to address this and allow Council to interrogate flood data using waterRIDE.

The community is currently partaking in a community resilience project with Griffith University. This information will enhance this project.

Snowy Monaro Regional Council

Berridale flood study/floodplain risk management study and plan

Flood inundation regularly impacts Berridale traffic flow, residences and businesses. The combined flood study/floodplain risk management study and plan will provide valuable flood information, investigate a range of flood management options, and assist Council and the community to develop an informed plan for managing Berridale flood risks. The Berridale flood study will provide flood levels to the Australian height datum.

Cooma/Bredbo/Michelago flood study, floodplain risk management study and plan

The Cooma–Monaro area is experiencing population growth, with this growth forecasted to continue. The townships of Michelago,

Bredbo and Cooma have experienced flooding in the past and Council is looking to quantify the flood risks and investigate potential flood risk management measures. The information from this project will inform many aspects of Council's forward plans and help Council, government agencies and our community to make more informed flood risk management decisions.

Snowy Valleys Council

Adelong floodplain risk management study and plan

This project represents the next stage in the floodplain risk management process with the development of a floodplain risk management study and plan for Adelong. The previous flood study identified significant flooding risks which will be investigated and mitigation options developed as part of this project.

Tweed Shire Council

South Murwillumbah voluntary purchase scheme

A voluntary purchase scheme is in place for high hazard flood affected homes along the Tweed River frontage of River Street, South Murwillumbah. The existing earthen levee provides limited low level protection from small flood events. Properties have been purchased in the region over the past twenty years. Only a few eligible properties remain, and it is difficult to predict when these will be purchased, given the voluntary nature of the program and the owner's willingness to sell their property. Once removed, the properties will become public open space to be enjoyed by the wider Tweed community.

Upper Hunter Shire Council

Aberdeen flood warning system

The development of a flood warning system for Aberdeen has been identified as an immediate priority in the Aberdeen floodplain risk management plan due to the magnitude of flood evacuation issues that exist and the rapid rate of rise of the Hunter River at this location. There is no warning system currently in place.

The Aberdeen floodplain risk management study has identified that up to 250 people may require evacuation during a major flood event. Significant numbers of dwellings located behind the levee have escape routes that are cut off by high hazard flooding in a five percent annual exceedance probability event. These dwellings suffer over floor flooding in a one percent annual exceedance probability event.

The proposed flood warning system will provide the State Emergency Service with more timely and accurate information to predict flood levels and issue flood warnings and enable the timely implementation of local emergency management measures including evacuations.

Waverley Council

Waverley local government area flood study

The Waverley local government area flood study will provide a better understanding of the extent of the flood issue, better inform our community of the risks and allow planning controls to be established for the protection of property and our community into the future.

Willoughby City Council

Flat Rock Creek floodplain risk management study and plan

A considerable number of properties in the catchment are affected by mainstream and overland flooding which poses a significant flood risk due to the nature of the flash flooding in such an urbanised catchment.

Council will prepare a floodplain risk management study and plan for the Flat Rock Creek Catchment to determine management options and measures in order to manage the current severity of flooding and the risk and damages associated with flooding throughout the catchment.

Wollongong City Council

Concept design of the Bellambi Gully West Street basin

The combined catchments of Whartons, Collins and Farrahars creeks, Bellambi Gully and Bellambi Lake floodplain risk management study and plan identified that a detention basin west of West Street could have significant benefits to reduce flood risk. This project will further investigate the feasibility, benefits and optimised design of the floodway. This should reduce flooding to a number of downstream properties.

Concept design of McMahon Street basin

The Fairy/Cabbage Tree Creek floodplain management study and plan identified that a detention basin in the McMahon Street reserve could significantly reduce flood risk. This project will investigate the feasibility, benefits and optimised design of the basin. This should reduce flooding to a number of downstream properties.

Investigation and concept design – Ursula Road scheme

This project will undertake investigation and concept design for the Ursula Road scheme. It aims to prevent flood waters from discharging through residential properties and prevents above floor inundation which has been experienced frequently by residents along Ursula Road and its surroundings in the past.

Page last updated: 31 October 2016