Floodplain management grants awarded and project summaries

Funding for these projects came from the NSW Government Floodplain Management Program.

The Floodplain Management Program funded 65 projects totalling $9,956,299. 

Overview

Project details

Ballina Shire Council

Alstonville, Lennox Head and Wardell overland flood study

This project will develop a 2-dimensional hydraulic model of the urban areas of Alstonville, Lennox Head and Wardell to analyse and map local overland flooding extents. The flood study and extents mapping will be used to implement development controls, inform land-use planning, and identify feasible infrastructure upgrades and structural protection measures available to reduce the impacts of overland flooding to Alstonville, Lennox Head and Wardell.

Bayside Council

Mascot, Rosebery and Eastlakes flood study review

The Mascot, Rosebery and Eastlakes catchment includes the suburbs of Mascot, Rosebery, Eastlakes and Pagewood. This catchment is affected by overland flooding and mainstream flooding.

Flood modelling for this catchment was completed based on parameters available in 2013. Since then, LiDAR information, building footprints, roads, and rainfall guidelines have changed significantly. This project will review and update the current flood study based on the latest information.

Bega Valley Shire Council

Wolumla flood study and floodplain risk management plan

Wolumla Creek is a tributary of the Bega River. Two regional roads transit the Wolumla Creek catchment. Detailed flood information is needed for emergency response and infrastructure planning.

An overland flow study covering the township of Wolumla will provide information on flood risk. The study area will encompass the Wolumla Creek catchment focusing on the localities of Wolumla, South Wolumla and Frog's Hollow.

The floodplain risk management plan will provide the council with some definitive actions to manage the flood risk within the catchment and deliver information to inform the council's future land-use and emergency response planning.

Blacktown City Council

Eastern Creek floodplain risk management study and plan

The Eastern Creek lower catchment comprises large areas significantly impacted by the Hawkesbury Nepean flooding. This area is of significant importance because it includes the North West growth area, the Western Sydney employment area and the Greater Penrith to Eastern Creek investigation area.

A floodplain risk management study and plan are the next steps for the Eastern Creek catchment, following the completion of the Eastern Creek flood study in 2019. This project will investigate a suite of flood management measures and evaluate options that could be implemented to manage the existing, future and continuing flood risk.

Broken Hill City Council

Broken Hill flood study

This project will complete a flood study of the Broken Hill local government area to determine and define the overall flood risk to the community. The flood risk will be identified through the development of a state-of-the-art flood model that will be used to determine:

• the degree of hazard the community is exposed to
• the scale of the population at risk
• gaps in flood information needed to manage flooding
• the potential need for flood mitigation works to reduce risks to the community in the area
• the potential for redevelopment and new development.

Byron Shire Council

Belongil and Tallow flood risk management study and plan update

The Belongil and Tallow Creek floodplain risk management study and plan are more than 5-years old and require updating, due to the development pressure in these catchments and recent flood events. This project will update the floodplain risk management study and plan to align them with current Australian standards.

Byron Shire overland flow path study

This project will undertake shire-wide overland flow path flooding and drainage studies to identify and prioritise flooding and drainage improvement mitigation upgrade works for the shire. The project will identify and prioritise potential mitigation works with the highest benefit-cost ratio to aid strategic land-use planning.

Camden Council

Investigation and design for building a levee from Saunders Road and along McCrae Drive

The draft Nepean River floodplain risk management plan recommends a flood protection levee west of McCrae Drive from Saunders Avenue to Cunningham Place as a high-ranked flood management measure for the Nepean River catchment. This project will investigate whether the proposed levee is a viable option to reduce flood levels for properties along McCrae Drive.

Update Nepean River flood study to include precinct development and urban land release

This project will update the Nepean River flood study to include changes in the catchment, such as precinct development and urban land release. The Nepean River flood study was based on LiDAR information captured in 2011, and there has been significant development in the catchment since then. The study will assess the cumulative impact of development on flooding, to address this issue in emergency management and land-use planning. It will help to understand the flood behaviour and risk and provide up-to-date flood information to the public.

Carrathool Shire Council

Hillston eastern levee upgrade feasibility study

The current Hillston floodplain risk management study and plan highlight the benefit of restoring and upgrading the eastern levee at Hillston; this option would potentially protect up to 73 buildings from above floor-level flooding during a 1% annual exceedance probability flood event. This site is also the location of a proposed heavy vehicle bypass. A feasibility study to investigate the possibility of incorporating a dual levee and heavy vehicle bypass at this location will be undertaken as part of the project.

Central Coast Council

Somersby and Kariong catchments overland flood study

The overland flood study area consists of the Somersby and Kariong catchments. The catchments drain to the Hawkesbury River via Mooney Mooney Creek and other smaller tributaries. Council currently has very limited flooding information for these catchments. This study will produce a 2-dimensional hydraulic model and inform planning decisions about the growth in this area, which has been identified as a regionally significant growth area.

City of Canterbury Bankstown Council

Floodplain risk management study and plan for sub-catchments of the Duck River

Duck River is one of the major tributaries of the Parramatta River and drains water from 2 sub-catchments: Wolumba and Duck River. The total catchment area is approximately 9.17 square kilometres and will accommodate substantial growth and development over the coming years. Significant floods have occurred in the Duck River catchment, including in March 2022.

This project will undertake Australian rainfall and runoff 2019 sensitivity analyses for the 2 sub-catchments and prepare a consolidated floodplain risk management plan for the Duck River catchment.

Clarence Valley Council

Esk River flood monitoring project

This project will install a remotely monitored flood gauge in the Esk River on Iluka Road.

Iluka Road provides the only access to the town of Iluka, and flooding of the Esk River has caused the road to be closed on multiple occasions. Council relies on community reports to know when the road has been cut by floodwater. The flood gauge will enable the council to advise the Iluka community about road closures.

Coffs Harbour City Council

Bonville Creek flood study

The Bonville Creek catchment covers an area of approximately 115 square kilometres. Two major tributaries join Bonville and Pine creeks from the south, and Middle Creek from the north. The existing flood study for the catchment was completed in 1995. There is ongoing development pressure in the catchment. This study will provide up-to-date, detailed and accurate flood mapping. This will provide a sound base for implementing flood planning controls and better inform strategic plans for improving flood immunity.

Coonamble Shire Council

Coonamble stage 4a levee – high bank stabilisation along Castlereagh River

This project will stabilise the high bank of the Coonamble levee adjacent to the Castlereagh River and the Sir Edward Hollstrom Bridge using oversized rock.

Cootamundra Gundagai Regional Council

Cootamundra/Gundagai shire villages (Coolac, Nangus, Tumblong and Darbalara) flood study

This project will develop a wide-scale flood study encompassing the whole of the Cootamundra/Gundagai local government area of the Murrumbidgee River floodplain. This will be used to develop individual flood studies for the villages of Coolac, Nangus, Tumblong and Darbalara and inform water levels for the hydraulic models for these studies.

Council of the City of Parramatta

Final expansion project for the City of Parramatta FloodSmart flood warning service

FloodSmart Parramatta provides the community with a flood warning service, but it does not cover the entire local government area. This project will complete the coverage of this service. It will also develop an innovative, dynamic tidal boundary process to enable real-time forecasting of the impacts from the tidal Parramatta River. The work will deliver flood modelling and 3 new warning areas, which will be operationalised within FloodSmart Parramatta.

Cumberland City Council

Duck Creek and Duck River overland flow study

An overland flood study for Duck River will complement other catchment overland flow studies that the council has undertaken.

This study will identify the properties within the Duck River catchment affected by overland flow, to enable actions to reduce the flooding impacts on human life and properties. The study will also ensure that residents are aware of the risks associated with flooding of their properties and will address these risks when residents are redeveloping their properties.

Eurobodalla Shire Council

Batemans Bay urban creeks floodplain risk management study and plan

The Batemans Bay urban creeks floodplain risk management study and plan will build on the outcomes of the adopted Batemans Bay urban creeks flood study and identify opportunities to mitigate and manage significant impacts of flooding. This will include climate adaptation strategies to manage inundation in the Batemans Bay area, consistent with the outcomes of the Eurobodalla open coast coastal management program.

Fairfield City Council

Bosnjak detention basin investigation and detailed design

The Bosnjak detention basin is located at Edensor Park; it has an upper and lower basin.

The Three Tributaries floodplain risk management study and plan identified that residual flooding could be removed by raising the lower basin wall to contain a one-in-100-year flood event.

Council will complete an investigation and design to determine the feasibility of the proposed detention basin upgrade options identified in the Three Tributaries floodplain risk management study and plan.

Federation Council

Federation villages flood warning system review

The floodplain risk management study and plan for Federation villages recommends that a project be undertaken to identify improvements to the flood warning system, to improve the current system for the villages of Boree Creek, Urana, Morundah and Rand.

All of these towns are located within the Billabong Creek catchment. Tributaries also impact, notably on Boree Creek, Urana and Morundah. An improved flood warning system will allow the town residents to prepare and respond in a manner which reflects the impending severity of flooding.

Morundah flood mitigation investigations, concept design and detailed design

The township of Morundah is subject to riverine flooding from Colombo Creek and major overland flow from local runoff. The previous flood study and floodplain risk management study and plan identified that 17 residential houses and 3 commercial/industrial buildings are flooded to above floor level in a 1% annual exceedance probability flood at Morundah. The floodplain risk management study and plan recommends a number of flood modification measures, including a levee improvement project, cross drainage culvert upgrades and an overland flow diversion bund. This project will undertake further investigations (including a levee structural integrity assessment), concept design and detailed design for these mitigation measures.

Urana and Boree Creek voluntary house raising/house purchase scoping study

The township of Urana is subject to riverine flooding from Urangeline Creek. The township of Boree Creek is subject to riverine flooding from Boree Creek. The Federation villages floodplain risk management study and plan identified that 26 houses at Urana and 34 houses at Boree Creek are flooded to above floor level in a 1% annual exceedance probability flood. The floodplain risk management study and plan recommends that a feasibility study investigate a voluntary house raising scheme for Boree Creek and a voluntary purchase scheme for both Boree Creek and Urana.

This project will assess the suitability of individual properties for inclusion in either a voluntary house raising or voluntary purchase scheme.

Urana levee upgrade – investigations, concept design and detailed design

The township of Urana is subject to riverine flooding from Urangeline Creek and Billabong Creek. The previous flood study report and floodplain risk management study and plan identified that 26 residential houses and 14 commercial/industrial buildings are flooded to above floor level in a 1% annual exceedance probability flood at Urana. The floodplain risk management study and plan recommends that the existing levee be extended and upgraded, consistent with current urban levee standards. This project will undertake further investigations to confirm potential impacts of the work and the levee alignment, and then progress to concept design and detailed design.

Georges River Council

Georges River Council flood risk overland flow study for former Kogarah Council

This project will undertake an overland flow study for the former Kogarah Council locale to assist Georges River Council, and the wider community in understanding the overland flood depths for various rainfall probabilities.

This work will inform future flood management studies and utilise 2-dimensional mathematical flood models.

Griffith City Council

Hanwood stormwater pump and levee – stage 1B construction

Hanwood stormwater pump and levee is a 2-stage project. Stage 1 involves constructing a stormwater water pump and associated drainage pipe network. Stage 2 involves constructing a levee and raising of the road.

This project will extend the stormwater pipe network along Kidman Way, Hanwood, to support the operation of a stormwater pump. This work will ensure the efficient transfer of flood flows away from the Hanwood community.

Gunnedah Shire Council

Review and update of Blackjack Creek flood study

Blackjack Creek drains south-west Gunnedah and runs west of the urban area through Wandobah Reserve, crossing the Oxley Highway and the Mungindi railway before discharging to the Namoi River.

The flood study for this area will be updated to consider changes that have occurred. The study will be revised to ensure flood modelling is current and will show the distribution, extent, levels and velocity of floodwaters.

Hornsby Shire Council

Hornsby Shire local government area rural areas flood study

This project will complete a flood study that covers all the rural areas within the Hornsby Shire local government area. This is required to ensure the Hornsby community is aware of the flood risk, and that any development and redevelopment of the rural properties are in accordance with the NSW Government's flood prone land policy.

Kempsey Shire Council

Kempsey central business district floodplain risk management plan – improved flood immunity investigation and design stage 3

Kempsey Shire Council will complete the investigation and design for upgrades to the central business district levee protection system. The upgrades were identified in the central business district floodplain risk management plan and include works related to the levee and flood gate improvements.

Upper (Central) Macleay flood study

This project will deliver the Central-Upper Macleay flood study. The study area extends along the Macleay River's from the Kempsey/Armidale boundary to the upper stream boundary of the Lower Macleay flood study project.

This project will provide valuable information to Kempsey Shire Council, landowners, State Emergency Services and Transport for NSW for current and future planning. It will improve key stakeholder knowledge about flooding in the central to upper catchment and evacuation route planning.

Ku-ring-gai Council

Lane Cove southern catchments flood study

Lane Cove southern catchments include the suburbs (or parts of) Killara, Lindfield and Roseville. This will be the sixth major catchment flood study undertaken for the Lane Cove River catchment area. This project will provide sufficient data for a flood risk management study and plan, which will guide future flood risk management actions for the study area.

Lake Macquarie City Council

North Creek and Warners Bay flood study

Lake Macquarie City Council will undertake a comprehensive review of North Creek flood study. Significant development in this catchment has had considerable effects on the floodplain and flood behaviour. A large part of residential/commercial/industrial zoned land in the catchment has been developed, with continuing population growth. There is pressure to increase density of developments and/or rezone further land for urban usage.

This comprehensive and updated flood study will incorporate new data from rainfall records and historic floods and use LiDAR to assist with calibration and modelling.

Liverpool City Council

Harris Creek flood study

This project will prepare a flood study for Harris Creek, a major tributary of the Georges River, which flows through Liverpool. Harris Creek crosses Heathcote Road at Holsworthy, the access road to Holsworthy Army Barrack, Holsworthy Station, residential areas, and access to the South Coast via Princes Highway.

The flood study will involve detailed hydrologic and hydraulic modelling and preparation of flood inundation maps, including flood level contours, flood risk and flood hazard maps. This will assist the council with floodplain management of the area. The study will also inform the Australian Defence Force, State Emergency Services and the Roads and Maritime Services in emergency management planning.

Lockhart Shire Council

The Rock flood study review

This project will review and revise the existing flood study to calibrate the flood model. It will use data from recent floods and consider Australian rainfall and runoff 2019 requirements.

MidCoast Council

Design of flood evacuation routes in Wingham

This project will complete the investigation, design and community consultation stages for upgrades to three primary evacuation routes used by many property owners in Wingham.

These measures address the recommendations made in the Wingham floodplain risk management plan, in which improving evacuation access is classified as a high priority strategy.

Gloucester caravan park access upgrade feasibility study

This project is a feasibility study to identify evacuation routes and road raising options for the caravan park in Gloucester, to provide flood free evacuations in a 1% annual exceedance probability flood. It will consider socioeconomic and environmental factors, flood impacts and community acceptance.

The feasibility study was classified as a high priority in the Gloucester floodplain risk management study and plan.

Post 2021 flood review of MidCoast floodplain risk management study and plan documents

This study will undertake post-flood reviews of all the floodplain risk management studies and plans across the MidCoast local government area, excluding the floodplain risk management study and plan for Bulahdelah, which is currently being reviewed in light of the March 2021 floods.

This review will include recommendations on triggers and response planning assistance for State Emergency Services, recommendations for flood warning systems, and consideration of all flood-affected properties for addition to the list for voluntary purchase and house raising.

Mosman Municipal Council

Mosman local government area flood study

The Mosman flood study will provide an understanding of flood risk for the entire Mosman local government area and will investigate flood behaviour for a range of flood events.

An integrated flood study will allow the council to evaluate the scale and severity of any flooding issues to inform flood risk management, emergency management and land-use planning decisions, and improve protection of people and property from flooding.

Murrumbidgee Council

Darlington Point floodplain management – final levee upgrade activities

This project will install a pump station to keep water levels below capacity in the stormwater retention basin at Ross Street, Darlington Point. This will mitigate flooding inside the upgraded levee structure during a flood event.

Nambucca Valley Council

Flood awareness signage

A high priority of this area's floodplain risk management plan is to increase community understanding of flood risk. This project will provide signage and markers to indicate historic and potential flood levels affecting the towns of Macksville and Bowraville. This will help the community make informed decisions about flood risk.

Narrabri Shire Council

Gwabegar flood study

Narrabri Shire Council will complete an in-depth flood study on the village of Gwabegar following flood events in 2021 and inundation of parts of the village.

This study will capture data for the village of Gwabegar and the surrounding area, to better understand flood behaviour and consequences in the area.

Penrith City Council

Blackwell Creek catchment flood study

The Blackwell Creek catchment partly covers the suburbs of St Clair, Erskine Park and Kemps Creek and discharges to South Creek upstream of M4 crossing.

A detailed flood study for the catchment will be undertaken to define the flood behaviour under existing catchment and floodplain conditions. It will use industry standard hydrologic and hydraulic modelling practices to define the flood behaviour. The project will also survey hydraulic structures, culverts, storm water drainage pits and pipes for flood modelling.

Byrnes Creek catchment flood mitigation work – detention basin and drainage investigation and detailed design

Byrnes Creek floodplain risk management study and plan recommends a series of flood mitigation measures to alleviate the flooding problem within the study area. Two of these measures include the construction of new stormwater drainage pipeline at Mamre Road and a new detention basin at Collins Street Reserve, St Marys. This project will complete a detailed investigation, prepare concept design plans, undertake environmental assessment, carry out community consultation and prepare detailed design plans ready for construction.

Chapman Gardens basin augmentation, Kingswood – detailed investigation and detailed design

The College, Orth and Werrington creeks floodplain risk management study and plan recommends augmentation of the Chapman Gardens basin in Kingswood. This will be part of a combined measure to provide greater attenuation of flows during more significant floods in the catchment and reduce overland flow flooding across critical flood evacuation routes.

This project will involve completing a detailed investigation, preparing concept design plans, undertaking environmental assessment, carrying out community consultation and preparing detailed design plans for construction.

Upper Byrnes Creek catchment overland flow flood study

This project will undertake a detailed local overland flow study for the Upper Byrnes Creek catchment and adjoining Ropes Creek. The study area comprises 5.4 square kilometres within St Clair and Erskine Park. It contains a number of overland flow paths. Flow from the catchment area contributes to Byrnes and Ropes creeks.

This study will define the flood behaviour under current floodplain conditions, and all potential flooding mechanisms will be included in the analysis of flood behaviour, including local overland flow and creek flooding. The adopted flood study will form the basis for future flood planning in the study area.

Port Macquarie-Hastings Council

Camden Haven flood study update and extension

This project will update the existing Camden Haven flood study with data captured following the March 2021 floods. This will include a calibration and validation exercise, to ensure the flood study is producing accurate data that reflects the best knowledge of flood behaviour in the catchment.

The project also proposes to extend the study area into previously unmodelled catchments that experienced severe flooding in March 2021. These areas have significant levels of development and currently rely on anecdotal flood intelligence to determine building floor levels.

The revised study will be used to inform an update to the Camden Haven floodplain risk management plan.

Queanbeyan-Palerang Regional Council

Bungendore overflow channel

This project involves construction of an overflow channel on Turallo Creek in Bungendore. This measure allows floodwaters to bypass the Tarago Road bridge crossing of the creek during flood events.

The overflow channel will pass under Tarago Road, using culvert structure, and will provide flood storage during major events. This will decrease the flood impact on nearby properties.

Captains Flat flood warning system

For most residents in the Captains Flat township, the first warning of a flood is inundation of their property or loss of access along roadways.

This project will investigate and design a flood warning/alert system, tied to stream gauges in the Molonglo River, to provide advance warning to the community of impending flood events. Installation of a flood warning system is a recommendation from the Captains Flat flood risk mitigation plan.

Queanbeyan voluntary purchase and house raising feasibility study

This project will complete a feasibility study looking at the viability of voluntary purchase and house raising in the high hazard floodway area along the Queanbeyan River. The study is a recommendation of the Queanbeyan flood risk mitigation plan.

Randwick City Council

Clovelly floodplain risk management study and plan

The Clovelly catchment is a part of Waverley local government area flood study, which was completed in January 2021. The flood study identified 888 properties to be tagged as requiring future flood related development controls. It also identified that the flood risk in the catchment was mostly from overland flow.

The Clovelly floodplain risk management study will identify and assess a range of management options, both structural and non-structural, to reduce the risk of flooding within the catchment.

Lurline Bay, Matraville, Malabar, Yarra Bay flood risk management study and plan

This project will deliver the Lurline Bay, Matraville, Malabar, and Yarra Bay flood risk management study and plan. During periods of heavy rainfall across the study area, there is potential for the capacity of the stormwater system to be exceeded. Flooding across the study area may damage property and vehicles and pose a risk to life during large floods. The flood risk management study and plan will identify and assess a range of management options to reduce the risk of flooding in the catchment.

Shoalhaven City Council

Lower Shoalhaven River floodplain risk management study and plan review

The Lower Shoalhaven River catchment has records of significant flood damages and associated loss of lives. The current floodplain risk management study and plan was adopted in 2011. Since then, the topography and land use of the Lower Shoalhaven River floodplain has changed, partly due to new developments and rehabilitation of the Terara levee.

The recently completed flood study will form the basis of the floodplain risk management study and plan. The study and plan will include identifying and analysing flood risk and assessing management options.

Revision of Broughton Creek flood study

The flood study will investigate Broughton Creek and its tributaries that drain from the north and west of Berry to the Lower Shoalhaven River. In the past, flooding in the catchment has caused property damage and posed a hazard to residents. The current floodplain risk management study and plan was adopted in 2012. It predates 2 major upgrades of the Princes Highway, significant and ongoing urban expansion and the introduction of Australian rainfall and runoff 2019.

This project will provide a contemporary definition of flood behaviour in the Broughton Creek catchment, focusing on riverine and overland flooding. It will significantly increase the reliability of flood information for strategic land-use planning across the study area.

St Georges Basin floodplain risk management study and plan review

The St Georges Basin floodplain risk management study and plan will investigate and recommend actions to mitigate and manage current and future flood risks. This catchment has records of significant flood damages and associated loss of lives.

Council has completed the St Georges Basin flood study, based on the latest technology, survey information and the Australian rainfall and runoff 2019 methodology. The flood study will form the basis of the floodplain risk management study and plan, including identification and analysis of flood risk and assessment of management options.

Snowy Valleys Council

Tumbarumba flood study

This project will complete a comprehensive flood study for the Tumbarumba township, to identify and map areas at risk due to flooding from local creek systems. This study will enable the flood risks to be determined.

Sutherland Shire Council

Kurnell floodplain risk management study and plan

Kurnell is a low-lying residential suburb on the southern foreshore of Botany Bay, it has a history of overland flooding and tidal inundation. This project will update the 2009 flood study, based on current best practice and available data. It will also update the 2013 floodplain risk management study and plan, focusing on property and behaviour modification measures.

Tenterfield Shire Council

Tenterfield flood study updated

This project will update the existing flood study and the floodplain risk management study and plan to take into account flooding events in Tenterfield in 2019 and 2021 and the new Australian rainfall and runoff (2019) information.

Tweed Shire Council

Dorothy-William streets levee area pump station

Local stormwater flooding behind the Dorothy-William streets levee system in Murwillumbah affects private property, public infrastructure (sewer) and the use of community facilities. This flooding is associated with elevated river levels outside the levee, preventing stormwater from draining away. This is a common levee problem but is particularly pronounced in this area.

The Murwillumbah central business district levee and drainage study recommends installing a pump station behind the levee. This project will install the pump station to minimise private property damage, disruption of community facilities and environmental/amenity issues associated with sewer infiltration.

Wagga Wagga City Council

Humula and Mangoplah flood studies

The villages of Humula and Mangoplah are located on the banks of tributary creeks of the Murrumbidgee River. They are subject to flood risks from localised overland flows and swollen creeks bursting their banks.

These flood studies will produce information on flood levels, velocities, flows, and hydraulic and provisional hazard categories for a full range of flood events.

Waverley Council

Floodplain risk mitigation plan – Waverley Council

Waverley Council covers an area of 9 square kilometres. There are significant redevelopment pressures from planned high rise, commercial development and rebuilding of older houses.

This project will identify planning controls and capital works programs to protect property and the community from future flooding issues.

Wentworth Shire Council

Wentworth flood study

This project will produce a state-of-the-art flood study for Wentworth and the surrounding areas. It will cover the Darling River south of Ellerslie, the Murray River downstream of Trentham Cliffs and the Darling Anabranch River downstream of Tara Downs Station, through to Warrananga station on the Murray River.

Wollondilly Shire Council

Shire-wide flood study – additional detail studies

This project involves the detailed examination of flooding in specific areas: Tahmoor, The Oaks and Appin, to produce information for use in a floodplain risk management study. To complement this work, this project will undertake detailed studies for the urban portions of Bargo, Yanderra, Buxton, Thirlmere, South Picton, Oakdale, Mount Hunter, Warragamba and Silverdale, where an estimated 1,500 properties have now been identified as flood affected. This will produce information for floodplain risk management studies in the future.

Stonequarry Creek floodplain risk management plan – investigation of floodway Clearance and voluntary purchase

This project combines two actions from the adopted Stonequarry Creek (Picton) floodplain risk management plan to enhance the flood resilience of Picton central business district:

• a feasibility study for the potential removal of buildings to clear a floodway for the conveyance of water from Stonequarry Creek through the Picton central business district, to determine if it is a viable option
• the investigation of a potential voluntary purchase scheme for Picton.

Stonequarry Creek floodplain risk management plan – investigation of western basins viability

This project will complete a feasibility study for a potential detention basin on Stonequarry Creek west of Picton, to determine if a basin or combination of basins is viable. This is an action from the adopted Stonequarry Creek (Picton) floodplain risk management plan, which aims to enhance the flood resilience of the Picton central business district.

It is important to determine if the detention basin option is viable. This study will better inform the Picton community of the options available to address the flood risk in the area.

Wollongong City Council

Lake Illawarra flood study and floodplain risk management study and plan

Lake Illawarra is a shallow coastal lagoon located between the ocean and the cliffs of the Illawarra escarpment. The Lake Illawarra catchment has an area of approximately 270 square kilometres, rising from sea level to 760 metres at Mount Murray.

This project will update the previous flood study (2001) and floodplain risk management study and plan (2012) to account for new Australian rainfall and runoff information (2019), catchment details and entrance management updates.

This project is a joint project with Wollongong City and Shellharbour City councils as the catchment managers on the north and south side of the lake.

Funding for these projects came from the NSW Government Floodplain Management Program.

The Floodplain Management Program funded 50 projects totalling $10,036,980.

Overview

Project summaries

Bathurst Regional Council

Bathurst flood plan update

The primary flood areas through Bathurst are along the Macquarie River, extending from the White Rock/Perthville tributary locations to Eglinton. The current plan was developed in 1993 to determine levee locations and enable management in the interim. The entire levee system has been constructed, and the Bathurst development area has extended beyond the original plan's footprint.

This project will update the flood plan, validate the levee system, implement modern industry standards, understand flood risk from overland flow and enable council to make informed decisions on managing flood risk in developed and soon-to-be developed areas.

Bayside Council

Feasibility study and concept design of floodplain risk management options – Botany Bay Foreshore Beach catchment

This study will investigate the feasibility and prepare a concept design for the 3 structural mitigation options which were identified in the Botany Bay and Foreshore Beach floodplain risk management study. The consultant identified 3 options which could substantially improve existing flood risk and reduce future flood damage:

• a detention basin option in Booralee Park
• a drainage amplification option in William Street
• a drainage upgrade in Dent Street with tidal backflow devices option.

Bega Valley Shire Council

Bega and Brogo rivers floodplain risk management plan emergency access upgrade stage 2

This project involves completing the remaining road raising, culvert augmentation and intersection adjustments at Newtown Road and Tathra Road, to secure flood free all-weather access to the adjacent South East Regional Hospital.

Bland Shire Council

Ungarie voluntary house raising/purchase feasibility assessment

Ungarie has major flood inundation issue with over 80 residential and 20 commercial properties subject to flooding by Humbug Creek. The floodplain risk management study and plan highlighted the highest priority action to deal with this as being voluntary house raising or voluntary house purchase. A feasibility study is the next step to be completed. This feasibility study will investigate eligible houses and develop a fully prioritised scheme ready for implementation.

Blue Mountains City Council

North Katoomba and North Leura flood study and floodplain risk management study and plan

The catchments of North Katoomba and North Leura have a strong need for a floodplain risk management study, as undeveloped land is being developed at a high rate. Council is not currently able to provide flood related planning statements on section 10.7 planning statements, and there is a need for these to support development applications. Overland flow flooding is known to occur in several locations in the catchments. This project will include a flood study and a floodplain risk management study and plan for these areas.

Bourke Shire Council

Louth levee feasibility study

This project will undertake investigation and concept design for levee upgrade works for the Louth levee. The objective is to identify constraints and costs associate with levee upgrade works.

Burwood Council

Burwood Council local government area wide flood risk management study and plan

The Burwood Council local government area consists of 4 stormwater catchments. These include:

• Powells Creek and Saleyards Creek
• Dobroyd Canal
• Exile Bay, St Lukes and William Street
• Cooks River.

This flood risk management study and plan will encompass the above 4 mentioned catchments, it will evaluate the flood risks and eventually prioritise flood risk management works to alleviate flooding and its effects.

Byron Shire Council

Debris control measures for Federation Bridge

Federation Bridge is the major bridge in Mullumbimby crossing the Brunswick River. Federation Bridge's pile design makes the structure vulnerable to the collection of debris, which causes a major blockage to floodway flow in the Brunswick River at Mullumbimby. This was a contributing factor to the increase in flood levels within Mullumbimby during the 2017 flood event. This project will undertake the investigation, design and construction of bridge control measures to reduce the potential of river blockage at Federation Bridge.

Camden Council

Detailed overland flow study of Narellan Creek catchment/Nepean River

This project will undertake a detailed overland flow study, to classify and quantify the overland flow in the Narellan Creek catchment. A detailed overland flow study is required to understand the overland flow behaviour in the catchment, to provide overland flow information to the public, for council issuing planning certificates, application of development controls and emergency management planning in existing and future developments.

Carrathool Shire Council

Hillston riverbank stabilisation works construction – stage 4

Sections of the Lachlan riverbanks at Hillston are unstable and eroding, threatening the structural integrity of the existing levee banks that protect the township. A feasibility study identified sections of the bank that require stabilisation, and the subsequent detailed design of the riverbank stabilisation works is complete. This project is for construction work to stabilise the two areas (HL1 and HL2).

Rankins Springs flood study/floodplain risk management study and plan

The township of Rankins Springs has been subject to flash flooding events. This project will develop a full 2 dimensional flood model for the area and then develop a floodplain risk management study and plan, to develop a list of floodplain management measures, planning controls and emergency response measures designed to lessen the impact of future floods.

Central Coast Council

Review and update of 1994 Tuggerah Lakes flood study

Tuggerah Lakes occupies an area of approximately 80 square kilometres and comprises of Tuggerah Lakes, Budgewoi Lake and Lake Munmorah and the immediate floodplain.

A flood study for Tuggerah Lakes was completed in 1994, and a floodplain management study and plan were completed in 2014. This review will provide updated information and modelling results to understand the interaction between lake flooding and opening of the entrance channel.

Cessnock City Council

Black Creek stage 2 floodplain risk management study and plan

A floodplain risk management study and plan will be developed for the lower Black Creek catchment. A flood study was completed for the area in 2015, providing council with important flood mapping data. The study identified the extent of flooding however, the associated risks and appropriate mitigation strategies remain unknown.

The floodplain risk management study and plan for the Black Creek catchment will investigate flood risks and develop options to manage those risks. A strategy comprising of suitable implementation actions will also be developed.

Greta floodplain risk management study and plan

The Greta flood risk management study and plan will address flood risk in the Anvil Creek catchment, which includes the townships of Greta and East Branxton. These townships have a history of significant flooding. The study will examine options to manage flood risk, in particular for the 18 properties that reported to have experienced over floor flooding.

City of Canada Bay Council

Exile Bay floodplain risk management study and plan

The floodplain risk management study and plan will assess the impacts of floods on the Exile Bay catchment community and identify management measures to treat flood risks.

Powells Creek east floodplain risk management study and plan

The flood risk management study and plan will assess the impacts of floods on the Powells Creek east catchment community and identify management measures to treat flood risks.

City of Canterbury Bankstown Council

Cooks River overland flow study – review and update

This project will update the overland flow study in the Cooks River catchment to address inconsistencies and compatibility issues identified in the existing flood model. Council seeks to undertake the following works:

• catchment delineation and topography update
• TUFLOW model development and calibration
• assessment of mainstream and overland flood behaviour, using Australian rainfall and runoff 2019 methodology
• flood mapping update.

Coffs Harbour City Council

Coffs Harbour City Council flash flood warning system upgrade

This project will upgrade and improve the Coffs Harbour City Council flood warning system, by providing a robust and easy to use web-based decision support system for council and the NSW State Emergency Service. The alerting mechanism of the system will also be upgraded to provide targeted alerts, with improved lead-time to the NSW State Emergency Service and expanded to include an opt-in system for the community.

Moonee Creek flood study review

Four main tributaries make up the catchment including Moonee Creek, Sugarmill Creek, Cunninghams Creek and Skinners Creek. The existing Moonee Creek flood study was completed in 1998. Since then, significant development has occurred within the floodplain and there is significant development pressure. The study will provide current, detailed, and accurate flood mapping that the council requires to better understand flood behaviour in the catchment. Better flood mapping provides a sound base for implementation of council's flood planning controls and better informs strategic plans for improving flood immunity.

North Boambee Valley detention basin

The North Boambee Valley Detention Basin was a recommended flood mitigation measure of the 2016 Boambee-Newports Creek floodplain risk management plan, council will implement this mitigation measure. The basin will reduce flooding to premises and dwellings in the downstream catchment, and reduced flood damages in the commercial areas of Isles Drive, Mansfield Drive and Cook Drive, and provide improved flood access to the hospital.

Coolamon Shire Council

Coolamon flood study and floodplain risk management study and plan

The first stage of the project is the development and completion of a flood study for the township of Coolamon. On completion and adoption of the flood study a floodplain risk management study and plan will be undertaken.

Fairfield City Council

Mimosa Road detention basin upgrade – construction

Fairfield City Council will carry out the upgrade works for Mimosa Road detention basin. This basin is located at Powhatan Street Reserve in Greenfield Park. The basin is on Orphan School Creek and is surrounded by residential development, it is also immediately upstream of Greenfield Park shopping centre.

The upgrade will increase the basin capacity from a 20-year average recurrence interval to 100-year average recurrence interval. It will also improve the basin embankment to satisfy dams safety requirements for this declared basin and hence lower/minimise the risk of embankment failure.

Greater Hume Shire Council

Culcairn flood mitigation works – construction

Culcairn lays predominately on the northern side of Billabong Creek, with the greatest degree of flood liability being due to Billabong Creek and the associated anabranch breakouts. Detailed design of a series of works has been completed that will mitigate flooding for the majority of Culcairn, for flood events up to and including a 1% annual exceedance probability. These include works to block anabranch flows through the township via two low level levees, a road lowering, and a compensatory levee upgrade on a private property to offset the afflux caused by these works at this property.

Hawkesbury City Council

Redbank Creek flood study and floodplain risk management study and plan

This project aims to improve understanding of flood behaviour and impacts and better inform management of flood risk in the Redbank Creek area. The project will include assessment of flooding conditions, by developing a comprehensive model within the Redbank Creek catchment where no flood studies have been conducted. The flood study will provide the technical foundation for the development of the subsequent floodplain risk management study and plan.

Kempsey Shire Council

Flood warning action implementation – Macleay River

The project aims to provide a more robust and improved flood warning network for the Macleay River. The project will include:

• review and installation of additional gauges in the middle of the catchment
• correlation of existing Kempsey and Smithtown gauges
• clarification of active gauges and incorporation into the ENVIRONMON system
• an improved ENVIRONMON system with enhanced capabilities.

The outcome will be a full working network of gauges and consistency with the current intermittent flood infrastructure.

MidCoast Council

Taree central business district levee feasibility study and heritage impact assessment

This project is a feasibility study for constructing a levee to protect the Taree central business district against a 1% annual exceedance probability flood event. This feasibility study will examine various levee options and consider heritage, socio-economic and environmental factors, flood impacts and community acceptance.

Upgrade of Croakers Creek flood gate

The Croakers Creek flood gate was constructed in the late 1920s and has exceeded its planned design life. It requires an upgrade or replacement to provide flood mitigation to the area. Such an upgrade will reduce the impacts of existing flooding, flood liability on communities, as well as private and public losses resulting from floods.

The Oxley Island Drainage Union, which was established in 1930 to run the flood gate and drainage network, will partner with council on this project.

Nambucca Valley Council

Upgrade to Councils flood warning system stage 2 – installation of 1 rainfall gauge at Warrell Creek

This project will install an additional flood gauge in the Nambucca River gauge system at Warrell Creek. The absence of a flood gauge at this location was identified as a deficiency in the flood warning system during the preparation of the flood risk management study and plan. It was recommended that this issue should be rectified as a priority.

Narrabri Shire Council

Boggabri floodplain risk management study and plan

Council will undertake the Boggabri floodplain risk management study and plan to follow on from the Boggabri flood study. The Boggabri flood study is the comprehensive technical investigation of flood behaviour, which provides the main technical foundation for the development of a robust floodplain risk management plan. This project will allow council to gain insight into the measures necessary to mitigate the flood risk within the town.

Narrandera Shire Council

Barellan levee detailed design

In 2018 the Barellan floodplain risk management study and plan identified a number of levee options in response to the township of Barellan being evacuated due to a flood event in 2012. This project is the detailed design of the Barellan levee, which is the next stage in the process of protecting the Barellan township from being flooded again.

Narromine Shire Council

Narromine levee 2021 feasibility study

Council proposes to extend the existing levee to provide increased protection from a possible 1% flood event to both commercial and residential areas of Narromine town. This project will undertake a feasibility study for the levee construction/extension and associated remediation works in Narromine.

Northern Beaches Council

Narrabeen Lagoon entrance clearance

The Narrabeen Lagoon entrance clearance project reduces the risk of flooding to low-lying areas surrounding Narrabeen Lagoon. Over time, the entrance of Narrabeen Lagoon becomes naturally in-filled with marine sand, which significantly increases the risk of flooding to public and private property in the floodplain. These works will result in the removal of up to 45,000 cubic metres of sand from the entrance of Narrabeen Lagoon. This will significantly reduce the flood risk to approximately 1500 dwellings, as well as numerous roads located on the foreshores.

Orange City Council

The Orange ultimate flood modification scheme: feasibility and design project

Ploughmans Creek floodplain risk management study and plan. It will assess the feasibility of constructing Orange's ultimate flood modification scheme, including preparation of concept designs for eight individual flood modification schemes:

1. Cutcliffe Park detention basin
2. Kenna Street stormwater drainage upgrade
3. Orange Agricultural Institute dam modification
4. Moulder Park detention basin
5. Ridley Oval detention basin
6. Glenroi Oval detention basin
7. East Orange Creek channel works
8. Blackmans Swamp Creek channel widening.

Penrith City Council

Emu Plains catchment floodplain risk management study and plan

A floodplain risk management study and plan for the Emu Plains catchment is required. This project will investigate flood management measures, which are suitable for managing the existing flood risk and develop a floodplain risk management plan for the study area.

Oxley Park levee – investigation and detailed design

This project consists of the investigation and detailed design of a flood protection levee, to prevent floodwaters from entering properties during major flooding of Ropes Creek up to and including 1% annual exceedance probability events. Preliminary modelling, as part of South Creek floodplain risk management study and plan, shows that the proposed levee will aid in the mitigation of flood risk and damage to properties fronting Melbourne Street and Hobart Street in Oxley Park.

Rickabys Creek catchment flood study

This project will undertake a detailed flood study for the Rickabys Creek catchment to define the flood behaviour under existing catchment and floodplain conditions. The project will also include the survey of hydraulic structures/culverts and stormwater drainage pits and pipes for flood modelling. Flow from the catchment area contributes to the Nepean River.

Port Macquarie-Hastings Council

Wrights Creek flood risk management study and plan

This project involves the formulation of a flood risk management study and plan, which aims to manage the flood risk within the highly urbanised and hydraulically constrained Wrights Creek catchment.

Queanbeyan-Palerang Regional Council

Floodplain risk management strategy for the Queanbeyan central business district

A comprehensive floodplain risk management strategy is required for the Queanbeyan central business district, as recommended by the recently completed Queanbeyan floodplain management study and plan. This would address issues such as the suitability of 'shelter-in-place" as a flood risk management strategy, the management of overland flow and gradual infill development, and the suitability of improvements to the flood warning system.

Stream gauge installation on the Queanbeyan River

The project involves installation of a telemetered stream gauge on the Queanbeyan River at the Queens Bridge. The installation of the telemetered stream gauge will allow New South Wales State Emergency Service and others to remotely monitor the water level in the river in real time. A radar-based distance sensor will be installed on the side of the Queens Bridge to measure water levels in the Queanbeyan River.

Shellharbour City Council

Detailed design of detention basin – DB4 at Oak Flats interchange, Shellharbour

The Horsley Creek catchment area has a long list of hazardous flood events. Council will carry out the detailed design and construction works of detention basin DB4.The detention basin DB4 is proposed near the intersection of East West Link Road and Princess Highway, in the upper reaches of the Horsley inlet. This will include a review of environmental factors, survey, geotechnical investigations and structural design at the site.

Snowy Valleys Council

Tumut flood study

This project will develop a full 2 dimensional flood model for the Tumut township and will include elements of both riverine and major overland flow flooding. The township is located adjacent to the Tumut River below Blowering Dam. The Goobarragandra River (an unregulated river) meets the Tumut River upstream of the town. A full range of design events will be assessed and mapped to assist Snowy Valleys Council to update their local environmental plan and development control plan documents and assist in the determination of development proposals in the township.

Strathfield Council

Saleyard Creek floodplain management

Strathfield Council will develop a floodplain risk management study for the Saleyards Creek and Powells Creek precinct, that involves:

1. an update to the flood study to include Australian rainfall and runoff 2019 design rainfall data and approach
2. an update of the modelling to include the Sydney Water channel refurbishment downstream of Pomeroy Street
3. a model update to include the North Strathfield rail underpass.

Tweed Shire Council

Tweed Heads south levee overtopping and drainage study

This project will provide a local flood risk management study for the South Tweed business district and residential area. The study will examine flooding, drainage and the hydraulic characteristics of the local levee and drainage systems, in order to identify potential flood risk mitigation and improvement measures. It will also include analysis of future flooding risks such as sea level rise and climate change. The findings of the study will inform development controls in the region and provide a local floodplain risk management strategy, including measures to be implemented within the area to reduce the impacts of flooding.

Wagga Wagga City Council

Glenfield drain and Flowerdale storage flood mitigation works – feasibility study

Glenfield drain is undersized in relation to the current contributing urban catchment, potentially because of new development since the drain was designed and constructed, as well as capacity reductions caused by erosion and slumping of channel banks.

In addition, elevated water levels in the Flowerdale storage area can significantly reduce the ability of the stormwater in the residential area immediately east of it to drain effectively.

Through this project, further investigation and design will be undertaken for the various measures along Glenfield drain before implementation occurs.

Lake Albert flood mitigation options – feasibility study

Further investigations into the Lake Albert enhanced flow scheme is a high priority flood mitigation option from the Wagga major overland flow flood risk management study and plan. It seeks to reduce flood damages to properties along Crooked Creek, Stringybark Creek, and downstream of Lake Albert Road. This project will conduct a feasibility assessment of the recommended options and then develop preliminary designs of the preferred scheme.

Uranquinty levee upgrade – investigation and design

The Uranquinty floodplain risk management study and plan has several significant recommendations for the village of Uranquinty. The option of upgrading the levee system around Uranquinty, to provide a 1% annual exceedance probability event level of protection, is the highest priority recommendation. This project will undertake an investigation and detailed design for the upgrading of the Uranquinty levee system to ensure protection of the town in flood events up to and including 1% annual exceedance probability.

Willoughby City Council

Scotts Creek floodplain risk management study and plan

A floodplain risk management study and plan will be undertaken for Scott's Creek, to improve understanding of flood behaviour and inform flood risk management in the study area. The study will cover overland flow across the catchment and new areas with no existing flood information. Measures will be developed to manage existing, future and residual flood risk. The floodplain risk management study will provide a basis for informing the development of a floodplain risk management plan which will provide measures to reduce the risk and extent of flooding.

Wollondilly Shire Council

Stonequarry Creek (Picton) – floodplain risk management plan project 1 – enhancing flood resilience in Picton central business district

This project has 4 main elements:

• modification of the community's response to a flood event by ensuring that the community is fully aware that floods are likely to interfere with normal activities in the floodplain
• improvement to the flood monitoring and warning system to maximise the available flood warning
• investigate 2 potential flood mitigation works to confirm their viability.

Wollongong City Council

Brooks Creek floodplain risk management study and plan

The aim of the study is to review the current Brooks Creek flood study, in light of new Australian rainfall and runoff 2019 and to use this data to prepare a floodplain risk management study and plan to help manage flooding in the catchment.

Minnegang, Hospital and Kully Bay floodplain risk management study and plan

The Minnegang Creek, Hospital Creek and Kully Bay catchments are within the suburbs of Lake Heights, Warrawong and Port Kembla, and discharge into Lake Illawarra. There are significant development pressures within the Kully Bay catchment, while the Minnegang Creek catchment includes properties at high risk of flooding and dam break.

This project will:

1. update the flood study using Australian rainfall and runoff (2019)
2. review the 2004 Minnegang Creek floodplain risk management plan
3. develop a new floodplain risk management plan for the Kully Bay catchment and Hospital Creek catchment.

Funding for these projects came from the NSW Government Floodplain Management Program (FMP) and the Floodplain Grants Scheme (FGS), which is funded by Resilience NSW.

The FMP funded 26 projects totalling $5,361,586 and the FGS funded 10 projects totalling $2,345,330.

Overview

Project summaries

Bland Shire Council

Ungarie floodplain risk management study and plan – stage 4

This project will deliver an early warning system for Ungarie, to give advanced notice of the need for evacuation due to a flood event. This is a recommendation made in the Ungarie floodplain risk management study and plan.

Canterbury-Bankstown Council

Cooks River catchment flood study stage 1

Seven councils have agreed to undertake a collaborative catchment-wide flood study in the Cooks River catchment. This project involves the collation, review and assessment of:

• the quality and adequacy of existing drainage network data
• completed flood study models
• completed flood studies
• floodplain risk management measures and controls for the catchment.

Floodplain risk management study and plan for sub-catchments of the Prospect Creek

A floodplain risk management study and plan will be developed for the 4 sub-catchments of Prospect Creek within the Canterbury-Bankstown local government area. This will enable the council to identify measures to reduce the impact of flooding in the catchment.

Cessnock City Council

Swamp-Fishery Creek flood warning system

This project involves the installation of 2 basic (siren based) flood warning systems within the Swamp-Fishery Creek catchment to alert residents that live within flood prone areas in Abermain and Weston of rising creek levels and flood emergencies. The primary purpose of these warning systems is to protect life.

The council will install an automated rain gauge in the upper Swamp Creek catchment to inform council, emergency service and government organisations during high rainfall or storm events.

Cessnock urban area stage 1 flood warning system

This project involves the installation of flood warning infrastructure at strategic locations within the Cessnock urban area, to protect life and property and to inform council and emergency service organisations during flood events.

The locations recommended for flood warning infrastructure as part of stage 1 works are subject to hazardous flooding and have been determined to be the highest flood risk areas in terms of risk to public safety and property.

City of Parramatta

A'Becketts Creek flood model and floodplain risk study and plan

A'Becketts Creek is an important local waterway running through the highly developed suburbs of Holroyd, Granville and Clyde. When the creek floods, this can cause significant damage to property and present a risk to life. Council will carry out a flood risk management study and plan, which will include updating the flood modelling to represent the current state of the catchment. This will enable the council to identify a suite of management options to reduce flooding, as well as provide flood mapping to allow new development to be safely built on the floodplain.

Coonamble Shire Council

Coonamble levee – stage 5 – land matters

This is the final stage of the Coonamble levee upgrade and will formalise land easements and acquisitions to ensure future access to the levee is secured.

Cootamundra Gundagai Regional Council

Cootamundra floodplain risk management study and plan

This project will review the previous Cootamundra floodplain risk management study and plan that was completed in 2001. It will utilise the newly developed flood model for Cootamundra to develop a strategy to address the significant flood risks that remain in Cootamundra and will culminate in the completion of a new floodplain risk management study and plan for the township. 

Forbes Shire Council

Forbes floodplain risk management plan

This project involves the preparation of a floodplain risk management study and plan, which will assess the economic impact of flooding on existing urban development, review options for flood mitigation and prepare a plan of works and measures for managing the present and future flood risk in Forbes.

Goulburn Mulwaree Council

Marulan flood study and floodplain risk management study and plan

Goulburn Mulwaree Council will complete a flood study, to define mainstream and overland flood behaviour at Marulan, which is situated within the upper level catchments of the Wollondilly River and Shoalhaven River. Council will also develop a floodplain risk management plan to inform their planning and engineering processes.

Griffith City Council

Hanwood stormwater pump and levee – stage 1 construction

This project involves the construction of a stormwater pump and associated drainage pipe system at Mallee Street to drain water from the east side of Kidman Way. It will also link the pump into council's supervisory control and data acquisition system. This project will provide much needed flood relief to residents and the wider community.

Hay Shire Council

Hay and Maude floodplain risk management study and plan project

This project involves the review of the existing Hay to Maude riverine flood model and update as required. This will be followed by completion of an overland flow flood model and the development of separate floodplain risk management studies and plans for each town.

Hilltops Council

Detailed design, land purchase and structural works for Young flood mitigation detention basin (Basin B2) – stage 4

This project will develop a detailed design for the upgrade of Young's stormwater drainage system, to alleviate the impacts of overland flooding to residential and commercial properties within the township of Young.

The design report will also identify land that needs to be purchased for the construction of the detention basin and indicates cost associated with land acquisition.

Young flood mitigation works (Basin B6) – stage 4

Hilltops Council has recently completed the Young stormwater upgrade scheme concept design study – stage 3. This study identified the need for construction of 8 stormwater detention basins along the Railway Drain and Chance Gully catchments to reduce the risk of flooding in Young. Council will undertake acquisition of land and detailed design for Basin B6 through this project. 

Ku-ring-gai Council

Lane Cove northern catchments flood study

This project will produce a flood study to understand the flood behaviour and flood risk within the Lane Cove - northern catchments area. Steep terrain and ridge-top development have led to the major flood risk within Ku-ring-gai, arising from flash flooding along headwater streams and drainage depressions. These events typically occur with little to no warning and can involve high hazard, fast flowing water at some locations.

Lachlan Shire Council

Goobang Creek flood study

This project involves the completion of a flood study of Goobang Creek to understand the impact of floods, flood water characteristics and consider potential measures required for flood mitigation. This will include the collection of both historical and real-time information to determine the effects of flooding events.

Lismore City Council

Review and update Lismore flood risk management plan

Lismore experienced a major flood event in March 2017, which peaked at 11.59m Australian height datum (Lismore Rowing Club gauge) and saw the central business district levee overtopped for the first time since it was completed in 2005. Rous County Council recently prepared a flood risk management study following the 2017 event. This project will update Lismore's flood risk management plan, based on the findings of the flood risk management study.

Lockhart Shire Council

The Rock west drainage works

This project involves the construction and enhancement of the 1220 metres of drain and associated culvert structures from Public Watering Place land through Nicholas Street, Yerong Street and Urana Street to Braithwaites Creek. The drainage system will collect water from the east side of The Rock from under the rail line and Olympic Highway and transfer it to Burkes Creek.

Mid-Western Regional Council

Mid-Western Regional Council floodplain risk management study and plan

This project will deliver a comprehensive floodplain risk management plan for Mudgee, to identify potential flood mitigation works to reduce the damage from storms. Investigations will include the feasibility of a flood bypass and identification of houses appropriate for voluntary purchase.

Moree Shire Council

Pallamallawa northern levee design review

The project will revise the current levee design in line with the recommendations from the December 2018 report and present the findings to the affected land owners and the wider community. The modifications identified need to be assessed against a comprehensive benefit/cost report for the community, the Floodplain Risk Management Committee and council to consider.

Murray River Council

River Estate and Jamieson Avenue (Barham) levee upgrade – detailed design

The Barham levee options assessment final report recommended upgrades for segments of the levee. This project involves the detailed investigation and design for the upgrade of the River Estate levee and Jamieson levee components of the Barham levee system.

Narrandera Shire Council

Narrandera voluntary house raising/purchase feasibility assessment

The recently completed Narrandera floodplain risk management study and plan recommended that a feasibility assessment be undertaken to determine community support for a voluntary house raising/purchase scheme, for properties located in high hazard areas on the Murrumbidgee River floodplain. A total of 14 properties, located in the high hazard floodway, will be assessed for voluntary purchase and a further 3 properties will be assessed for voluntary house raising. These residences are affected in the 1% annual exceedance probability flood event and flooding cannot be mitigated by other means.

Newcastle City Council

Flood study for Cottage, Styx and Throsby Creeks, Newcastle

This project will update the flood model for the Cottage, Styx and Throsby creeks catchments using updated topography, Australian rainfall and run-off methods and current modelling techniques.

Northern Beaches Council

Middle Harbour flood study

A flood study will be completed for Belrose, Davidson, Frenchs Forest, Forestville and Killarney Heights, in the west of the Northern Beaches local government area. This covers approximately 1200 hectares and the area drains west towards Middle Harbour. This study will map the overland flow paths and identify flood prone properties to enable planning controls to be introduced.

Parkes Shire Council

Cookamidgera flood study and floodplain risk management plan

A flood study and floodplain risk management plan is required for the Cookamidgera village and Flagstone Creek catchment area, to determine mitigation measures to reduce the severity of flooding impacting urban and rural properties. This project will include protection measures of residential and commercial properties, as well as identifying 'dry areas' for use for shelter or evacuation points during flood events.

Bogan Gate and Gunningbland floodplain risk management plan

In Gunningbland and Bogan Gate properties are routinely affected by flooding. A flood study and floodplain risk management study and plan is required for the Gunningbland Creek catchment area and Bogan Gate township, to quantify the risk and determine options that may be implemented to reduce the impact of floodwater on these communities.

Trundle flood mitigation feasibility study

This project will provide further investigation, design and feasibility information for lifting or lowering of existing road levels and increasing culvert or pipe capacity through infrastructure. The project will ensure improved flood access to Trundle Hospital and Bogan Gate.

Penrith City Council

Peach Tree and Lower Surveyors Creeks catchment floodplain risk management study and plan

Peach Tree and Lower Surveyors creeks catchments have been identified as having a significant flooding problem. This project involves the completion of a floodplain risk management study and development of a floodplain risk management plan for the Peach Tree and Lower Surveyors creeks catchments.

St Marys flood protection levee upgrade – investigation and detailed design

The existing St Marys flood protection levee was built over 25 years ago to protect the area from the South Creek 1% annual exceedance probability flood. The South Creek floodplain risk management study and plan, completed in February 2020, recommended that the levee be upgraded. This project includes a detailed investigation of the levee, auditing of the levee to identify any structural defects, preparation of detailed design plans for the construction of the upgrade works and completion of a detailed investigation and design to install a suitable flood gate at the Byrnes Creek culvert.

Doonmore Street, Penrith retarding basin – detailed investigation and detailed design

This project involves a detailed investigation, preparation of concept design plans, environmental assessment, community consultation and detailed design plans for a retarding basin at the corner of Doonmore Street and Derby Street, Penrith.

Richmond Valley Council

Update the Richmond River flood study

This project will produce a single consistent flood model for the Richmond Valley local government area from Casino to Broadwater. This involves rebuilding the Richmond River flood model (2010) for use in modern flood model software, inclusion of calibrated modelling for the Casino township, and the merging of the Evans River flood study (2014) and the Pacific Highway Woolgoolga to Ballina road upgrade flood modelling. This will result in the elimination of disparity between the Richmond River and Casino models where they interface and overlap.

Shellharbour City Council

Review of Horsley Creek floodplain risk management study and plan

There is major catchment and land use changes expected within this study area, due to Albion Park Rail Bypass. Through this project council will update the design flood estimation techniques across the Horsley Creek catchment.

Tamworth Regional Council

Manilla South Street levee

Properties on the southern side of South Street, Manilla are subject to flooding. This project involves the detailed design and feasibility study for a levee along South Street, to protect these properties.

Flood warning – Nundle and Woolomin

Flash flooding at Nundle and Woolomin allows little warning time. This project aims to create a flood intelligence model, based on key rainfall and river gauges, and to implement a system to notify people affected. The model outputs would be communicated to the local state emergency service and automatically by phone to affected people. The project will see the installation of an additional stream gauge and rainfall gauge on Duncans Creek. A public address system will also be installed to notify visitors to the Nundle caravan park.

Wollongong City Council

Review of Wollongong City floodplain risk management study and plan

The Wollongong City catchment area includes the suburbs of Wollongong, Coniston, Port Kembla, and drains towards Wollongong golf course and JJ Kelly Park, before discharging into Port Kembla Inner Harbour via the Gurungaty Waterway. Council will review the floodplain risk management study and plan, to inform strategic planning in the catchment and ensure appropriate planning controls are implemented.

McMahon Street detention basin detailed design

Cabbage Tree Creek has experienced significant flooding in storm events. Council is currently completing a concept design for a detention basin at McMahon Street, Fairy Meadow, to mitigate flood risk on some severely flood affected properties. The modelling undertaken as part of the concept design development has shown significant benefits for a large distance downstream from the construction of a basin. This project will see the development of a detailed design for the detention basin.

Funding for these projects came from 2 programs: the NSW Government Floodplain Management Program (FMP) and the Floodplain Grants Scheme (FGS), which is funded by the NSW Office of Emergency Management.

The FMP funded 50 projects totalling $7,264,249 and the FGS funded 4 projects totalling $1,881,585. Seven projects valued at $1,626,190 were activated from the reserve list in February 2020.

Overview

Project summaries

Bayside Council

Feasibility study/concept design of drainage network upgrade for 3 catchments

The Mascot, Rosebery, Eastlakes floodplain risk management study (2018) analysed the drainage network in Hollingshed Street and Baxter Road areas. It found that the capacity of this system was exceeded in flood events as small as the 0.5 exceedance per year. The capacity of this drainage network relative to the land use in the area was identified as a key cause of the flood problem.

Investigation into duplicating the drainage network was undertaken and the preliminary findings show that this will eliminate flooding for 32 properties in a 1% annual exceedance probability (AEP) event and 64 properties in a 10% AEP event.

This project will produce a concept design and feasibility study for duplication of the drainage network and undertake community consultation to show the local community how Council is resolving flooding issues in this catchment.

Review of floodplain risk management studies to form a consolidated plan

This project will undertake a review of the Australian Rainfall and Runoff 2016 sensitivity for the 3 catchments and produce a consolidated flood risk management plan for Bayside west (west of the Cooks River). The study area includes the Sans Souci drainage catchments, Bonnie Doon drainage catchments, Bardwell Creek drainage catchments and Scarborough Ponds drainage catchments.

This study will provide the basis for Council decision making through identification and prioritisation of flood risk management activities that influence future development and reduce flood risk in the community.

Bega Valley Shire Council

Bega and Brogo rivers catchment flood warning system scoping and feasibility

This project will complete a scoping and feasibility study for flood warning system improvements within the Bega and Brogo river catchments. This will include a review of the existing flood warning systems and identification of opportunities for their improvement and augmentation.

The scoping and feasibility study will identify a range of options and quantify the cost-benefits of each identified option. Council will also explore the application of IoT (internet of things) technologies as a low-cost option for improving flood warning.

Wolumla Creek flood study at Wolumla and surrounds

A flood study of the Wolumla Creek catchment will be undertaken to support future land use and emergency management planning. The Wolumla Creek catchment is transversed by 2 major regional roads and Council wishes to quantify any access and emergency response issues from flooding. An overland flow study will be undertaken around the township of Wolumla to provide planning information.

Berrigan Shire Council

Tocumwal/Barooga floodplain risk management study and plan

This project will review the flood study completed for this stretch of the Murray River in 2010, then update it to current best practice. A floodplain risk management study for Tocumwal and Barooga and their environments will then be undertaken. Although these towns are currently protected by a system of levees, the structural integrity of some sections is questionable and there are extensive areas outside these levees that have significant development pressure.

Bland Shire Council

Wyalong and West Wyalong overland flow flood study

This project will develop a flood model for the Wyalong and West Wyalong urban areas. The flooding experienced in these townships is primarily produced by intense local rainfall events that result in overland flow through the towns surcharging the drainage system and re-establishing historical flow paths. A full range of design floods will be assessed and mapped to assist in Bland Shire Council's update to their local environment plan and development control plan documents.

Blayney Shire Council

Blayney flood retarding basins study

This project will allow Council to undertake the initial investigation and assessment required for the preparation of a concept design and cost estimates for the installation of flood retarding basins to protect the community from overland flooding.

Bourke Shire Council

Bourke levee risk management study and plan

The town of Bourke is protected by a ring levee. The levee was constructed in 2 stages, from 1994 to 1997. In February 2009, heavy rain resulted in damage to the levee and local flooding within the levee.

This project will comprehensively investigate issues related to flooding and the levee, assess the risks posed and make recommendations and a plan for future actions.

Brewarrina Shire Council

Brewarrina levee risk management study and plan

This project will comprehensively investigate issues related to flooding and the levee, assess the risks posed and make recommendations and a plan for further actions.

The objectives of the study are to:

• quantify the potential risk to the township from river flooding
• gain an understanding of and document the current deficiencies in the levee
• develop a plan to fully investigate the levee's deficiencies.

Cabonne Council

Detailed investigation and design of Molong town levee

This project will undertake a detailed investigation into the options outlined in the Molong town levee feasibility study. The finalised study contains 3 levee alignment options, with a further 3 options relating to annual recurrence intervals of 5 years, 20 years and 50 years. The aim of this project is to explore the options and identify the best possible plan. Community consultation will occur to confirm the supported option, then a detailed design for that option will be completed.

Campbelltown City Council

Campbelltown southern catchments flood study

The creeks comprising the Campbelltown southern catchments are Spring Creek, Mansfield Creek and six unnamed creeks which flow into the Georges River. This catchment contains the suburbs of Rosemeadow, St Helens Park and parts of Ambarvale, Bradbury and Airds. Rosemeadow and St Helens Park are nearly entirely residential and are the highest populated suburbs without a flood study in the local government area. This flood study is being undertaken to better understand current flooding issues as a result of overland flow and to minimise damage to residential properties. This will also ensure a consistent approach to floodplain risk management can be applied across the urban areas of the Campbelltown local government area.

Dumaresq Street drainage upgrade detailed design

This project will investigate the feasibility and provide a detailed design for major drainage upgrades along Dumaresq Street. It is vital that the significant flooding issues identified in the floodplain risk management study and plan are addressed, to ensure the optimal solution can be implemented and minimise risk to life and property.

Ingleburn central business district drainage upgrade detailed design

This project will investigate and deliver a detailed design of major drainage upgrades through the Ingleburn central business district, as recommended in the Bow Bowing Bunbury Curran Strategic Floodplain Risk Management Study and Plan. Flooding in the precinct creates a significant risk to life and property. Detailed design of the drainage line is essential to ensure an optimal development outcome is achievable throughout the precinct in the future.

Canterbury-Bankstown Council

Milperra drain masterplan works – stage 11 part 2

This project will be the final stage of the Milperra drain masterplan, which will reduce flooding problems that are experienced within this catchment. The final stage of this project includes the rehabilitation of 1 kilometre of Milperra drain, between Ashford Avenue and Henry Lawson Drive, to a more natural creek system with improved flood capacity.

Carrathool Shire Council

Hillston riverbank stabilisation works detailed design – stage 3

The recently completed Hillston riverbank stabilisation feasibility study identified 2 areas requiring bank stabilisation work. This project will deliver a detailed design for the riverbank stabilisation works, including a preliminary design and tender documents that can be used to proceed with the stabilisation of these areas in the future.

City of Lithgow Council

Lithgow floodplain risk management study and plan

The Lithgow floodplain risk management study and plan will assess the impact of flooding on both the existing and future urban development areas of Farmers Creek and Marrangaroo Creek catchments. This project will examine options to reduce flood impacts to an acceptable level.

Clarence Valley Council

Alice Street levee rehabilitation – investigation and design

A section of the levee between Queen and Alice Street has been identified as being at risk due to scouring and undercutting, potentially causing slips that will risk the stability of the levee. This project will carry out a geotechnical assessment on the stability of the flood levee and riverbank and recommend options to improve riverbank stability in this area.

Wooli flood study and management plan – review and update

This project will update the 1999 Wooli floodplain risk management plan to incorporate recent flood events and best practice modelling to predict flood levels. The updated flood study and plan for Wooli will allow for informed decisions on managing flood risk.

Coffs Harbour City Council

Coffs Creek floodplain risk management study and plan review

This floodplain risk management study and plan will review flooding in Coffs Harbour and assess the performance of the recently constructed detention basin for various flooding scenarios. There are parts of the catchment that the detention basins do not benefit, such as the northern tributaries areas, this study will investigate mitigation options in these areas and options to compliment the detention basins.

Coffs Harbour City Council northern local government area flood study

There are significant development and redevelopment pressures in the Coffs Harbour northern coastal catchments, which would benefit from improved flooding information and a contemporary flood study. There have also been major changes in the catchment dynamics due to the upgrade of the Pacific Highway.

This project will deliver a flood study for a large portion of the northern local government area to determine flood behaviour and risk. The flood models will be used to assess possible flood impacts for developments.

Investigation and design of Park Beach floodplain options 1, 2 and 4

The Park Beach floodplain risk management plan identifies 4 project options for consideration to reduce the flood effects on the low-lying area. This project will investigate and design the 3 highest benefit options to determine their feasibility and complete detailed designs.

The projects that will be considered include: Macauleys Headland pipeline upgrade; Railway Culvert upgrade (North) and Railway Culvert upgrade (South) and Hogbin Drive improvements.

Cootamundra-Gundagai Regional Council

Gundagai voluntary house raising/purchase feasibility assessment

This project will undertake a feasibility assessment to determine if there is community support for a voluntary house raising/purchase scheme for properties located in high hazard areas on the Murrumbidgee River and Jones Creek floodplains. A total of 26 houses have been identified as potentially being eligible for voluntary house raising and a further 22 houses for possible voluntary purchase.

Fairfield City Council

Georges River floodplain risk management study – phase 1

The Georges River is one of the major catchments in the Greater Sydney Region, with a history of flooding both at local and regional levels. The catchment is home to 1.4 million residents over 950 square kilometres and it will be required to accommodate significant growth and development over the coming years.

The Georges Riverkeeper floodplain risk management subcommittee formed in 2018 to undertake a regional approach to floodplain risk management in the Georges River. Eight councils will work together to develop a collaborative catchment-wide floodplain risk management study.

This project will be the first step in developing a collaborative catchment-wide floodplain risk management strategy. Phase 1 covers the collation of flood modelling, flood risk, floodplain risk management and emergency response data across the catchment. This data will be reviewed for gaps, consistency, adequacy and reliability.

Federation Council

Corowa, Howlong and Mulwala flood study

This project will develop a flood model of the Murray River floodplain that covers the major towns of Corowa, Howlong and Mulwala and the rural floodplain areas in between these centres. There is significant development pressure in this stretch of the Murray River and Council intend to define the existing flood risks due to both riverine and major overland flow flooding in this area.

Greater Hume Shire Council

Jindera and Pioneer streets diversion drain works

Four Mile Creek is the main waterway through Jindera, it has a series of tributary waterways which discharge into it. These tributary waterways include the Watson Street Drain, Pioneer Drive Drain, Molkentin Middle and Molkentin East waterways and they generally have limited incised channel capacity. In large floods, there is consequently substantial out of channel flooding.

This project will complete the investigation and design of potential diversion drainage works at Jindera and Pioneer streets (west of Jindera), that may divert floodwater and eliminate future flood damage to properties and businesses in the township.

Walla Walla Queen Street waterway catchment diversion drain

This project will construct a diversion channel, with small levee banks, along a privately-owned airstrip to direct stormwater flow to the east of Walla Walla. The drain will run east along the airstrip discharging stormwater to a culvert under Morgans Road, Railway and Chinatown Lane. This diversion will help reduce flooding along Queen, Railway, Commercial and Market streets in Walla Walla.

Griffith City Council

Yoogali McCormack Road levee and DC605J culvert upgrade – stage 1 construction

This project involves the upgrade of culverts and construction of levee banks along McCormack Road between Burley Griffin Way and Bosanquet Road intersections. The new culverts will provide additional in-bank capacity and the levee will contain waters within the existing drainage channels. These measures will prevent floodwaters exceeding the drain capacity and entering Yoogali during major floods, providing a 1% annual exceedance probability flood immunity to the residents of Yoogali.

Hawkesbury City Council

Combined MacDonald River, Colo River, Webbs Creek and Greens Creek flood study and floodplain risk management study and plan (FRMS&P)

Hawkesbury Council will investigate flooding and flood risk management measures for the Colo River, MacDonald River, Webbs Creek, Greens Creek and their respective tributaries. This will provide Council and its community with essential information for land use planning and emergency management decision making, as the area continues to experience growth.

Review of Hawkesbury floodplain risk management study and plan 2012

Infrastructure NSW has developed a regional flood study for the Hawkesbury-Nepean Valley. The regional flood study provides the most up-to-date flood information for the Hawkesbury-Nepean Valley based on current modelling techniques.

This project aims to update the Hawkesbury floodplain risk management study and plan using the regional flood study data and to review management options for flood-prone land.

Hilltops Council

Stormwater upgrade detailed design, land purchase and structural work stage 4

Hilltops Council is approaching completion of the Young stormwater upgrade scheme concept design study – stage 3. This study identified the need for construction of eight stormwater detention basins along Railway drain catchment and Chance Gully catchment to reduce the risk of flooding in Young. Council now wishes to undertake acquisition of land, detailed design and construction of the basins. This project is for the construction of basin B1 out of four basins. This will reduce the impact of flooding in existing residential development, as well as in the central business district of Young.

Kempsey Shire Council

Lower Macleay floodplain flood risk management study and plan

Council will prepare a flood risk management study to identify, assess and evaluate flood risk management options. Based on the outcomes and findings of the flood risk management study, a Lower Macleay floodplain flood risk management plan will be prepared to assist Council with strategic and statutory flood planning requirements.

Ku-ring-gai Council

Middle Harbour – northern catchments flood study

Steep terrain and ridge-top development have led to major flood risk within Ku-ring-gai, from flash flooding along headwater streams and drainage depressions. This project will develop a flood study that will provide sufficient data to undertake a flood risk management study and plan to guide future flood risk management actions.

Kyogle Council

Bonalbo flood study

Council will undertake a flood study to improve their understanding of flood behaviour and impacts, and to make better informed management decisions in relation to flood risk in Bonalbo. This study will also provide a sound technical basis for any further flood risk management investigations in the area.

Lake Macquarie City Council

Filling the early warning gap – flood warning system stage 3 and 4

This project will address a significant gap in Lake Macquarie's flood monitoring and notification system and build Council and stakeholder capacity to respond to floods. This will be achieved by:

1. Upgrading selected rainfall and water level sites to report in real-time and install new water level gauges in Stony and Cockle creek catchments.
2. Upgrading the current predictive flood model and Lake Macquarie FloodWatch webpage for Lake Macquarie, Dora Creek, Stony Creek and Cockle Creek.
3. Developing, implementing and evaluating a community engagement strategy in consultation with relevant emergency services to raise awareness of the flooding hazard in Lake Macquarie City.

Liverpool City Council

Review of Cabramatta Creek flood study

Cabramatta Creek catchment is one of the most rapidly developing catchments in New South Wales with vast areas having been rezoned for residential and industrial developments, new suburbs built, new motorway (M7) constructed and other infrastructure provided. All of these activities have the potential to exacerbate existing flooding problems experienced in the lower catchment.

This study will involve a review of existing data and flood models, detailed hydrologic and hydraulic modelling incorporating the latest available digital elevation model, and flood risk category mapping for various design flood events up to the probable maximum flood.

Lockhart Shire Council

The Rock west drainage works

This project involves the construction and enhancement of 1220 metres of drain and associated culvert structures from public watering place land through Nicholas Street, Yerong Street and Urana Street to Braithwaites Creek. The drainage system will collect water from the east side of The Rock from under the rail line and Olympic Highway and transfer it to Burkes Creek. The implementation of this drainage system will complement the Streven Street drainage project in The Rock. It is expected that this project will reduce the number of over floor flood-affected residences by 18 and mitigate flooding to 26 residences.

Mid-Coast Council

Upper Myall and Bulahdelah area flood study

This project will revise the Myall River flood study for the upper Myall and the township of Bulahdelah to:

1. Improve modelling to accurately describe velocity distributions and flood extents.
2. Include Australian Rainfall and Runoff 2016.
3. Incorporate sea level rise benchmarks and other climate change considerations.
4. Examine in detail the effects of additional river crossing and floodplain embankments.

Moree Plains Shire Council

Feasibility study of flood risk management plan recommended options

This project will review the impact of privately-owned rural levees on the northern floodway, further assess the 1955 flood and model if there is a feasible geometry/alignment for the proposed town levee. The outcome will be a more comprehensive understanding of the impact of the rural levees, the floodway hazards and the positive and negative impacts of mitigating the effects of flooding with adjustments to the existing rural levees and the design consideration for the possible town levee option.

Muswellbrook Shire Council

Muscle Creek flood warning system – development phase

This project will investigate and develop a flood warning system for Muscle Creek. The warning system will assist in the management of roads, rail and bridges to ensure emergency access across Muscle Creek and the timely evacuation of impacted residents.

Narrabri Shire Council

Wee Waa levee upgrade investigation and design – stage 3

This project will investigate the alignment and design of a levee upgrade for Wee Waa, which will provide a 1% annual exceedance probability protection to the township. This project is identified as the number one priority in the risk study and plan.

Narrandera Shire Council

Narrandera main canal embankment levee investigation

The recently completed Narrandera flood risk management study and plan review has recommended that an investigation to assess the requirements for upgrading the southern main canal embankment be undertaken. This project will involve geotechnical assessments, reviewing previous conceptual designs, negotiations with the canal owners at Murrumbidgee Irrigation and other assessments to determine the feasibility of upgrading the canal bank to urban levee standards.

Narrandera overland flow detention basin strategy feasibility assessment

This project will investigate the feasibility of a proposed detention basin strategy to mitigate the flood risks in areas subject to major overland flow in Narrandera. The recently completed Narrandera flood risk management plan review recommended this option to protect properties located in North Narrandera along a major overland flow path. This project will compare 3 different detention basin options and develop the preferred option to concept design stage.

Parramatta City Council

Expansion of the FloodSmart Parramatta flood warning service

FloodSmart Parramatta provides emergency response partners and residents with tailored flood risk information. The current system only covers part of the City of Parramatta local government area with other high-risk areas still without a warning service. This project will expand the service along Clay Cliff Creek across Camelia down the tidal river and along Vineyards Creek and Subiaco Creek. This will involve adding 2 new water level gauges, extending the flood model and developing the systems to provide the data and warnings to partners and the public.

Penrith City Council

Cranebrook overland flow flood study

This project will undertake a detailed local overland flow study for Cranebrook and North Penrith. The study area comprises 12.9 square kilometres bound by the Nepean River and Penrith Lakes in the west, Great Western Railway Line in the south and the Northern Road in the east. This study will define the flood behaviour under current floodplain conditions.

Port Stephens Council

Lower Hunter floodplain cumulative development impact study and plan

This project will use existing models to assess the sensitivity of the floodplain to filling. The assessment will analyse the cumulative impact on flood characteristics including infrastructure upgrades (road and rail), on future development. The impact assessments will examine a range of floods, determine acceptable levels of fill in specific areas and recommend consistent strategies, policies and development controls to manage the filling.

Queanbeyan-Palerang Regional Council

Bungendore flood risk management implementation measure 1

The Bungendore floodplain risk management study identified a series of works to mitigate flooding within the town. This project covers the first mitigation measure and is located at the confluence of the Turallo, Halfway and Millpost creeks in Bungendore. This project will removal dense vegetation (including noxious and exotic weeds), re-shape the confluence of Turallo, Halfway and Millpost Creeks and rehabilitate the confluence area, channel bed and banks.

Review of Bungendore floodplain risk management study and plan (2014)

Over the last 10 years the area has experienced residential growth, this flood study review will ensure that flood impacts, and associated liabilities are appropriately managed. This will help to ensure future residential, commercial, industrial and critical infrastructure is placed appropriately.

Randwick City Council

Birds Gully and Bunnerong Road floodplain risk management study and plan

The Birds Gully and Bunnerong Road flood study identified that 1517 properties are inundated in a 1% annual exceedance probability flood. This project will undertake a floodplain risk management study and plan to investigate, evaluate and recommend a suite of mitigation and management options to reduce and manage flooding problems in the catchment.

Feasibility study to upgrade the main culverts at Gardeners Road

The Kensington Centennial Park floodplain management study and plan identified the need for a feasibility study on upgrading the culverts under Gardeners Road. The goal of this project is to determine the feasibility of increasing the pipe capacity under Gardeners Road to reduce the risk of flooding upstream of Gardeners Road.

Shellharbour City Council

Review of Elliot Lake – Little Lake floodplain risk management study and plan

Council will undertake the process of updating the design flood estimation techniques across the catchment. The Elliot Lake – Little Lake catchment has been selected, as there are very little major catchment and land use changes expected within this study area. Council will also take the opportunity to update the adopted flood model to incorporate additional overland flow paths that were not included in the previous study.

Sutherland Shire Council

Sutherland Shire overland flood study

Many parts of the Sutherland Shire are subject to overland flooding. Council has completed overland flood studies for high-risk catchments, however, Council has only a limited knowledge of overland flow behaviour and flood risk across the remainder of the Shire. Council will undertake a flood study using the latest flood modelling techniques to provide preliminary information on flood behaviour, hydraulic categories, flood hazard and flood risk for these areas.

Temora Shire Council

Temora floodplain risk management study and plan

This project will develop a floodplain risk management study and plan for the township of Temora. It will identify and assess a variety of flood risk management measures aimed at effectively managing the full range of flood risks. A floodplain risk management plan will then be developed that identifies a list of recommended floodplain management measures to implement over time.

Tenterfield Shire Council

Urbenville and Woodenbong flood study

Urbenville and Woodenbong currently do not have up-to-date flood information. This project will comprehensively map the flood behaviour of the area, using Lidar and providing detailed flood information to inform Council's planning departments and assist in ensuring future developments adequately consider flood risk.

Tweed Shire Council

Detailed design of Murwillumbah central business district levee spillway

During the March 2017 flood, the earthen section of the Murwillumbah central business district levee was overtopped in a few localised low points. The overtopping occurred in an unexpected location and in an uncontrolled nature. The Murwillumbah central business district levee and drainage study recommended the remediation of the levee low points and installation of a formalised spillway to achieve safe and controlled overtopping of the levee during events equal to or greater than the levee crest. This project will complete a detailed design for a spillway and levee rehabilitation.

Update and expansion of the Tweed Valley flood study

The current Tweed Valley flood study was completed in 2009 and covered only the more populated areas of the Tweed. Historical records and anecdotal evidence suggest that there are many more properties in the Tweed Shire's rural areas and villages that are exposed to flooding. This project proposes to expand the Tweed Valley flood study into the upper catchment to cover the villages of Chillingham, Tyalgum, Kunghur, Uki, Stokers Siding, Bilambil and the rural areas in between. Flood intelligence in these areas will allow Council to identify high-risk areas/properties.

Upper Hunter Shire Council

Review and update of the Aberdeen floodplain risk management study and plan

Upper Hunter Shire Council completed the Aberdeen floodplain risk management study and plan in 2015. At the time this plan was prepared, Council and the consultant were aware of discrepancies between the Aberdeen flood study and the Muswellbrook flood study. These discrepancies were not able to be resolved at that time and the risk management plan was prepared based on the modelling information provided in the Aberdeen flood study. Subsequent studies for the upgrade of the Aberdeen levee indicate that the design flood flows and levels in the earlier Aberdeen study are overestimated. This project will undertake a review of the flood modelling for Aberdeen.

Upper Lachlan Shire Council

Scoping study – 4 villages flood warning alert system

Council will undertake a scoping study for a total flood warning system to identify a range of options and to quantify the cost-benefits of each identified option. This project will determine the best option for a flood warning system for the 4 villages of Crookwell, Gunning, Collector and Taralga.

Wagga Wagga City Council

Wagga Wagga flood warning system improvements investigation

This project will review and assess the current flood warning system, scope deficiencies and make recommendations on additional infrastructure needs and any other improvements.

Wingecarribee Shire Council

Review of the Wingecarribee River flood study

This study will model the tributaries and the river to produce depth, velocity and hazard maps with detailed overland flow. The information will be used in development assessment, planning capital works, updating the current development control plans and local environmental plan.

Wollongong City Council

Review of Allans Creek floodplain risk management study and plan

This project will review the existing floodplain risk management study and plan, to determine flood mitigation measures to manage flood risk. The review will update technical data relating to the nature and extent of flooding in the catchment.

Review of Fairy/Cabbage Tree creeks floodplain risk management study and plan

The main objective of this project is to develop a floodplain risk management plan that addresses the existing, future and continuing flood risk for both existing and future development.