Floodplain Management

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Penrith City Council (02) 4732 7777 (02) 4732 7958 council@penrithcity.nsw.gov.au 601 High St Penrith NSW 2750 Australia
Floodplain Management

Penrith City lies within the Hawkesbury - Nepean Catchment and is dominated by rivers, creeks, waterways and associated tributaries, the most significant being Nepean River and South Creek. Both systems are accompanied by wide open floodplains.

We have 40 creek systems and associated catchment areas, all draining into either the Nepean River or South Creek, and all have been identified as requiring comprehensive floodplain risk management studies and plans.

Councils are required to address flooding issues under the NSW Government's Flood Prone Land Policy. The NSW Government has released the updated NSW Flood Risk Management Manual dated June 2023. The new Manual was Gazetted on 30 June 2023 and is made available for public use. The Gazetted 2023 Flood Manual is an update of the NSW Floodplain Development Strategy (April 2005) and that specifies a staged process:

  1. Data collection
  2. Flood Study
  3. Floodplain Risk Management Study
  4. Floodplain Risk Management Plan
  5. Implementation of the Plan.

But we can't do it alone. Management of our floodplains is complex, sensitive and raises many challenges.

Floodplain management plans are being put together for areas most at risk of flooding, looking at the causes and extent of possible flooding and what can be done to help affected areas. Reducing the risk of future flooding requires managing flood-prone areas properly with responsible development and drainage infrastructure.

The Regional Flood Study, 2019 into flooding in our area has been prepared by Infrastructure NSW and is available at the Infrastructure NSW website.Infrastructure NSW (now called NSW Reconstruction Authority) is currently updating their regional Hawkesbury – Nepean River Flood Study which is in its final stage and soon be released by the NSW Government for public comment.

Council is a member of Floodplain Management Australia, as part of our commitment to sound floodplain management practices.

Floodplain Management Australia Logo

Council is developing Floodplain Risk Management Strategies and Plans for the City's flood affected areas. The Committee meets every 3 months and includes Councillors, community representatives, Council staff, representatives from state agencies such as NSW Reconstruction Authority, the Department of Planning and Environment and the State Emergency Services, and representatives from relevant neighbouring Councils. We have selected 4 community representatives for the committee, which will give the community an important voice as we develop and implement floodplain management plans. For more information, contact Council's Floodplain Engineering Coordinator on 4732 7947 or email .

We will make the draft Flood Studies and Floodplain Risk Management Plans available for public exhibition and comment. Council publishes the dates for public exhibitions and welcomes feedback. Visit our Have Your Say website for information about any currently on public exhibition.

To find out what controls may apply to your land, see Development Control Plans.

There have been changes to the Environmental Planning & Assessment Act 1979 in reference to Planning Certificates. Planning certificates formerly known as section 149 Certificates will now be known as section 10.7 Certificates. This change is effective as of Thursday 1 March 2018.

Under NSW legislation a contract for a sale of a property must include a current section 10.7 certificate from Council. A section 10.7(2) certificate shows the zoning of the property, its relevant state, regional and local planning controls and other property issues such as land contamination and road widening. A section 10.7(2)(5) certificate provides further detail and includes other information such as advice from other authorities, subdivision history, easements and flood related advice where that information is available. Council will put a flood notation on the s10.7 certificate for any property identified by flood studies as being below flood planning level and that may attract flood related development controls.

For more information about flood planning notations and what they mean for your property, read our Floodplain Management and Planning Notations Fact Sheet. If you’re considering purchasing land with a view to further development, we recommend you speak to Council first about any flood related or other development controls applicable to the property. There is no charge to speak with one of Council’s duty planners by phone or in person at our offices. For more information potentially affected properties, contact Council's Duty Planner on 4732 7777

For information about staying safe and what to do in the event of a flood please visit the State Emergency Service website.

The SES has also prepared specific flood emergency information for the Hawkesbury Nepean region.  It can be accessed on the SES Website.

Over the years, Council and relevant state agencies have undertaken various flood studies and flood assessment reports for various parts of our City. In July 2019, Infrastructure NSW released the Hawkesbury Nepean Valley Regional Flood study. The full study and its atlas of 382 maps can be viewed at Infrastructure NSW. 

In 2006 we completed an Overland Flow Flood Overview Study for our entire City, to:

  1. identify and map all major overland flow paths
  2. define local flood behaviour in the study area
  3. assess provisional flood hazard for properties at risk from flooding, and
  4. rank catchment areas in terms of severity of flooding to help prioritise catchment areas for further studies and risk management plans.

It identified 40 creek systems and their catchment areas that will ultimately require Floodplain Risk Management Studies and Floodplain Risk Management Plans.

ACCESSIBILITY
Please contact Council on 4732 7777 if you have any issue accessing the information within the documents above or with the video below. Due to the nature of the information contained within these documents, it is not possible to make it fully accessible.

Our progress so far:

The College, Orth and Werrington Creeks Catchment Floodplain Risk Management Study and Plan is now complete and was adopted by Council on 21 February 2021, after public exhibition of the draft study.

The College, Orth and Werrington Creeks Catchment area is approximately 12 square kilometers and covers the suburbs of Werrington, Werrington County, Cambridge Park, Kingswood and Caddens. The study catchment is generally bounded by the M4 Motorway in the south and Dunheved Road in the north. A copy of College, Orth and Werrington Creeks Study Area Map is available for downloading to gain more information about the catchment area.

You can download the College, Orth and Werrington Creeks Floodplain Risk Management Study and Plan from the following links:

This follows the adoption of the College, Orth and Werrington Creeks Catchment Overland Flow Flood Study in 2017, which can be downloaded from the following links:

You can also download the full 441 page College, Orth and Werrington Creeks report (pdf 225.6MB) and the 349 page College, Orth and Werrington Creeks appendices document (pdf 94.1MB). Please note that due to the nature of these flood study documents it isn't possible to provide them in an accessible PDF format. Please email:  or call4732 7777 if you require assistance accessing the report.

In 2020, Penrith City Council completed a detailed overland flood study for the Emu Plains study area, which includes the suburbs of Emu Plains, Emu Heights and Leonay. Council is now preparing a Floodplain Risk Management Study and Plan for the catchment, and is calling for community input. The Study and Plan will inform us about the flood management measures needed and help us plan for and manage known flood risks. Sound flood management based on local knowledge will help Council reduce flood damage, enhance resilience and improve social and economic opportunities.

Council has appointed an engineering consultant to prepare the Study and Plan. The project will be overseen by the Penrith Floodplain Risk Management Committee and has received financial and technical support from the State Government under its Floodplain Management Program.

This study is focused on local overland flooding rather than flooding from the Nepean River. A separate Nepean River Floodplain Risk Management Study and Plan is being completed in parallel to the Emu Plains project.

An information sheet about the Risk Management Study and Plan can be downloaded here.

Previously Council has completed Emu Plains Overland Flood Study. The flood study report has three volumes and can be downloaded from the following links:

Emu Plains Overland Flood Study Vol 1

Emu Plains Overland Flood Study Vol 2

Emu Plains Overland Flood Study Vol 3

For more information about the flood study please contact Council’s Engineering Services on 4732 7777 or by email:  

The Little Creek Catchment Floodplain Risk Management Study and Plan is now complete and was adopted by Council on 21 February 2022, after public exhibition of the draft study and plan.

The Little Creek catchment area is approximately 4.8 square kilometers and covers the suburbs of Colyton, Oxley Park, St Marys and North St Marys. The study catchment is generally bounded by the M4 Motorway in the south and Christie Street in the north. A copy of Little Creek Study Area Map (pdf 77.5MB) is available for downloading to gain more information about the catchment area.

You can download the Little Creek Catchment Floodplain Risk Management Study and Plan from the following links:

This follows the adoption of the Little Creek Catchment Overland Flow Flood Study in 2017, which can be downloaded from the following links:

You can also download the full 427 page Little Creek Catchment Flood Study report including all appendices (pdf 342.1MB). including all appendices. Please note that due to the nature of these flood study documents it isn't possible to provide them in an accessible PDF format. Please contact Council on 4732 7777 or by email:   if you require assistance accessing the report.

Penrith City lies within the Hawkesbury - Nepean Valley of which the catchment area is about 21,000km2 extending as far as Goulburn in the south, Lithgow in the west and Newcastle in the north. Over the years Council and various state agencies have undertaken flood studies and investigations for the Hawkesbury Nepean River.

In May 2017, the NSW Government announced the Hawkesbury-Nepean Flood Risk Management Strategy to reduce the potential flood risk to life, the economy and social amenity in the Hawkesbury-Nepean Valley. The NSW Government’s Flood Strategy is designed to deliver nine key outcomes. One of the outcome of the Flood Strategy relates to accessing contemporary flood risk information, and the key output is the contemporary Hawkesbury-Nepean River Flood Study.

The NSW Reconstruction Authority has now released an updated flood study for the Hawkesbury-Nepean River that is titled Hawkesbury-Nepean River Flood Study, May 2024. The Flood Study reports can be viewed at https://flooddata.ses.nsw.gov.au/flood-projects/hawkesbury-nepean-river-flood-study-2024. The Hawkesbury-Nepean River Flood Study, May 2024 represents the most up-to-date and robust regional flood information for the Hawkesbury-Nepean River (between Bent Basin Road near Wallacia through to Brooklyn). In response, Council at its Ordinary Meeting on 9 December 2024, resolved to adopt the Hawkesbury-Nepean River Flood Study, May 2024 for all its future flood planning purposes. The adopted Hawkesbury-Nepean River Flood Study, May 2024 supersedes all previous flood studies and will be used for Council’s future flood planning purposes, including development assessment.

If you have any specific questions about the Hawkesbury-Nepean River Flood Study, May 2024 or the NSW Government’s work in the Hawkesbury-Nepean Valley, please visit to NSW Reconstruction Authority’s Webpage.

For more information about Nepean River flooding or Council’s floodplain management works contact Council's Floodplain Management Section by email: or on 4732 7777

The Penrith CBD Floodplain Risk Management Study and Plan is now complete and was adopted by Council on 23 March 2020, after public exhibition of the draft. The Penrith CBD Catchment Study Area is located on the southern side of the railway line and is generally bounded by The Northern Road to the east, Jamison Road to the south and Mulgoa Road to the west. The study covers an area of approximately 340 hectares (or 3.4 square kilometers) and comprises the Penrith Central Business District and surrounding suburbs.

Download the Penrith CBD Floodplain Risk Management Study and Plan Volume 1 Report and Penrith CBD Floodplain Risk Management Study and Plan Volume 2 Maps.

Completion of the Floodplain Risk Management Study and Plan follows Council’s adoption of the Penrith Central Business District (CBD) Catchment Overland Flow Flood Study

Council is preparing a Floodplain Risk Management Study and Floodplain Risk Management Plan for the Peach Tree and Lower Surveyors Creeks Catchment, which includes the suburbs of South Penrith, Jamisontown and parts of Penrith. The study will help us to better understand, plan for and manage the risk of flooding across the catchment.  

Council has engaged engineering consultants Catchment Simulation Solutions to prepare the study and plan. The study is overseen by the Penrith Floodplain Risk Management Committee and is prepared with financial and technical support from the NSW Government under its Floodplain Management Program. 

The floodplain risk management study and plan has progressed to its final stage and the draft report will be on public exhibition from Thursday 27 February to Thursday 27 March 2025 at  www.yoursaypenrith.com.au/PeachTreeFRMS&P. Submissions close at 5pm, Thursday 27 March 2025. 

This study follows the adoption of the Peach Tree and Lower Surveyors Creeks Flood Study in 2019, which you can download from the following links:  

Peach Tree and Surveyors Creeks Flood Study Volume 1 Main Report 

Figure 62 - Peak Water Levels for the 1% AEP Flood 

Figure 66 - Flood Planning Area  

You can also download: 

the full 324 page Peach Tree and Surveyors Creeks Flood Study Volume 2 Figures 

719 page Peach Tree and Surveyors Creeks Flood Study Volume 3 - Appendices

The South Creek Floodplain Risk Management Study and Plan is now complete and was adopted by Council on 27 April 2020, after public exhibition of the draft.

The South Creek study area covers that part of the South Creek floodplain in the Penrith LGA that is roughly bounded by Elizabeth Drive to the south, The Northern Road to the west, Ropes Creek/LGA boundary to the east and Blacktown Road/Richmond Road to the north. The study area covers the suburbs of Berkshire Park, Llandilo, Werrington, Werrington County, St Marys, Oxley Park, Claremont Meadows, St Clair, Erskine Park, Twin Creeks, Mount Vernon and Luddenham.

A map of the catchment area is available for downloading.

You can download the South Creek Floodplain Risk Management Study and Plan here:

Completion of the Floodplain Risk Management Study and Plan follows Council’s adoption of the South Creek Flood Study report and South Creek Flood Study maps. However, in 2022, the Infrastructure NSW as part of the South Creek sector review updated Council’s 2015 South Creek Flood Study. The updated flood study is now called Wianamatta South Creek Flood Study, 2022.

The flood study report is available for download from the NSW Flood Data Portal.

The St Marys (Byrnes Creek) Catchment Floodplain Risk Management Study and Plan is now complete and was adopted by Council on 23 March 2020, after public exhibition of the draft. The St Marys (Byrnes Creek) catchment covers an area of approximately 310 hectares (or 3.1 square kilometers), generally bounded by the M4 Motorway to the south, St Marys levee to the west and discharging into South Creek to the north. It includes the St Marys levee, which was originally built to minimise the flooding impact from South Creek.

Download the St Marys (Byrnes Creek) Catchment Floodplain Risk Management Study and Plan Volume 1 Report and St Marys (Byrnes Creek) Catchment Floodplain Risk Management Study and Plan Volume 2 Maps.

Completion of the Floodplain Risk Management Study and Plan follows Council’s adoption of the St Marys (Byrnes Creek) Catchment Overland Flow Study.

In 2023 Penrith City Council completed and adopted a detailed overland flow flood study for the Cranebrook Catchment after public exhibition of the draft study. The Cranebrook catchment study area includes the suburbs of Cranebrook, Northern Penrith and parts of Castlereagh and Cambridge Gardens. The study area is approximately 1,330 Ha (13.3km2) and is bound by the Nepean River and Penrith Lakes in the west, Western Railway Line in the south and The Northern Road in the east. The study area is impacted by flows from the Nepean River that breaks into the study area, creating a large overland flow path.

You can download the Cranebrook Overland Flow Flood Study from the following links:

Please note that due to the nature of these flood study documents it isn't possible to provide them in an accessible PDF format. Please contact Council on 4732 7777 or by email: if you require assistance accessing the report.

Council has secured grant funding from the NSW Government under its 2021/22 Floodplain Management Program to undertake a comprehensive flood study for the Rickabys Creek Catchment. The catchment includes the suburb of Londonderry and sections of Agnes Banks, Castlereagh, Cranebrook, Llandilo and Berkshire Park. 

This study will update Council’s existing flood information and help us plan for, predict and manage the risk of flooding across the catchment. To prepare the study, Council has engaged Catchment Simulation Solutions Pty Ltd, an independent consultant specialising in flooding investigations. 
 
If your property is located within the study area and has experienced flooding, we invite you to complete our survey and share your local knowledge and personal experience. By doing so, you will help us to improve our understanding of flood behaviour, identify flooding ‘trouble spots’ and aid in the development of a computer flood model. 

Find out more and complete our survey at Your Say Penrith between Thursday 8 June and Thursday 6 July 2023. 

Penrith City Council is preparing a Flood Study for the Blackwell Creek catchment. The primary objective of this study is to define the flood behaviour under various design flood conditions such as the 1% AEP flood (100-year flood) and identify flood risk areas. The study area is located between South Creek and Ropes Creek and includes the residential suburbs of St Clair and Erskine Park. The study area includes part of the Western Sydney Employment Lands located between Erskine Park and the Warragamba Pipeline.      Council has engaged an engineering consultant to prepare the flood study. If you currently live or own a property in the study area, or have some information about flooding in the catchment, please complete the questionnaire provided in Council’s Your Say Penrith website.

Penrith City Council is preparing a Flood Study for the Upper Byrnes Creek catchment. The primary objective of this study is to define the flood behaviour under various design flood conditions such as the 1% AEP flood (100-year flood) and identify flood risk areas. The study area is located between South Creek and Ropes Creek and includes the residential suburbs of St Clair, Erskine Park and Colyton.    Council has engaged an engineering consultant to prepare the flood study. If you currently live or own a property in the study area, or have some information about flooding in the catchment, please complete the questionnaire provided at Council’s Your Say Penrith website.

Council is preparing an overland flow flood study for the Claremont Creek catchment which includes parts of Claremont Meadows, Orchard Hills, Caddens and Kingswood. To prepare the study, Council has engaged an independent consultant specialising in flooding investigations, Catchment Simulation Solutions Pty Ltd. The study will be overseen by the Penrith Floodplain Risk Management Committee and is receiving financial and technical support from the State Government under the Floodplain Management Program.

Future flood studies

We have committed to undertake Floodplain Risk Management Studies and Floodplain Risk Management Plans for all 40 catchment areas identified in the Penrith Overland Flow Flood Overview Study. The catchment areas have been grouped into 25 study areas and prioritised based on their severity of flooding, size of catchment areas, proximity to catchments in the group, hydraulic connectivity and dependency of other adjacent catchments. For more information contact Council's Engineering Services on 4732 7777.