Queensland Reconstruction Authority

Planning for stronger, more resilient floodplains

Part 1 – Interim measures to support floodplain management in existing planning schemes The scale and scope of the weather events which affected Queensland in 2010/2011 meant that to plan and build stronger, more resilient communities into the future, Councils need better information to make informed decisions about how and where we build. To assist Queensland’s Councils, the Queensland Reconstruction Authority (the Authority) has undertaken the largest floodplain mapping exercise in the State’s history. The maps contained in the toolkit - Planning for stronger, more resilient floodplains are drawn from evidence of past flooding, including soils, topography and satellite imagery. They are informed by the 2010/2011 summer disasters but do not represent the actual flood line for that period. Why? Because while the whole of Queensland was affected last summer, we know there have been larger floods in some areas in the past. What the maps do show are areas where inundation has previously occurred or may occur. At the conclusion of this mapping exercise, floodplain mapping will be available for the whole of Queensland. The State’s river systems do not stop at local government boundaries and so for the first time, these floodplain maps have been developed on a sub-basin wide basis. And with them, comes the opportunity for Councils to adopt the floodplain maps and supporting development controls into existing planning schemes. This Guideline provides Councils - especially those who lack the resourcing capacity to undertake detailed studies - with a ready- made toolkit to help assess future development applications and the opportunity to better align floodplain management and land use planning. Rockhampton Source: Queensland Image Library

Part 1 Consultation period On 17 September 2011, the Honourable Anna Bligh MP, Premier and Minister for Reconstruction, launched the guideline Planning for stronger, more resilient floodplains - Part 1 - Interim measures to support floodplain management in existing planning schemes. The Part 1 Guideline was open for consultation for 40 business days, closing on 11 November 2011.

During the consultation period, the Authority together with a representative from the Department of Environment and Resource Management (DERM) visited and briefed 34 Councils individually and undertook 29 industry briefings. These sessions were an invaluable exercise and in the case of each Council, allowed targeted consideration of the toolkit and its potential use.

A Consultation Report was prepared to provide an overview and analysis of the submissions and feedback received during the consultation period. The Authority duly considered the feedback received during the consultation period in the finalisation of this Guideline.

A copy of the Consultation Report is available at www.qldreconstruction.org.au.

The Authority acknowledges the following organisations that have provided their support to this important program of work: • Geoscience Australia • Banana Shire Council • Fitzroy Basin Association • Central Highlands Regional Council • Local Government Association of Queensland • Bureau of Meteorology • CSIRO

2 The journey towards stronger, more resilient Responsibilities floodplains interim National Most of our towns and cities are located on floodplains, both inland Moderate State and coastal. This is an historical fact, principally for reasons associated with water supply, transportation, waste disposal, advantageous High Regional points for river crossings, access to productive soils or recreation Quality Local purposes. Hence, these towns and cities will be subject to flooding Across the from time to time. State Low growth Put simply, if we are to use floodplains for these purposes, we need to towns Major acknowledge and plan for flooding in a way that improves resilience centres of our built form and encourages the safety and well being for our communities and individuals. Seeing significant change in Queensland’s floodplains will be Interim Floodplain generational – the full implementation of this improved resilience Assessment Overlay Flood Investigations at Sub-Basin Levels will be seen over time through specific shifts in local land use planning policy and development assessment decision-making that Planning controls take account of the vulnerabilities of development in the floodplain. Figure 1: Fit-for-purpose flood mapping However, through interim changes to the way development is addressed in these risk areas, real steps can be taken now to ensure new development in Queensland’s floodplains considers and responds to adverse flood events. Part 1 represents an interim response that can be applied across the entire State. Part 1 includes the development of an Interim Floodplain The key to ensuring our State copes with these flood events is Assessment Overlay incorporating a mapping product and supporting improving the resilience of our communities. In response, the planning scheme provisions. A major driver of this Guideline is the Authority has prepared the two-part Guideline Planning for stronger, ability to provide low growth Councils with workable products now, more resilient floodplains. in lieu of detailed flood investigations which will take significant time and resources to complete across the State. It is recognised that not all As demonstrated in Figure 1, an important aim of Planning for Councils will benefit from Part 1 as some Councils are well advanced with stronger, more resilient floodplains is to provide a fit-for-purpose flood mapping and planning scheme provisions. However, all Councils response to help Councils introduce consistent and specific planning can learn from recent events and incorporate the principles of floodplain controls to manage flood risks in the floodplain assessment area. management in the development and preparation of their new planning schemes.

Floodplain Management Stronger, more resilient floodplains

Context Understanding Analysis Implementation Delivery 1 2 3 4 2010/2011 • Scale of impact • Floodplain • Toolkit to • Process for events from the Mapping support Councils incorporating 2010/2011 event • Mapping toolkit into existing QldRA planning scheme • Structure of • Code provisions Roles and floodplains and Functions river systems • TSPP 2/11 • QDC

Planning for stronger, Key information is provided more resilient floodplains throughout this Guideline. It is marked with this symbol. It has been provided aims to help Councils courtesy of the Queensland Floods Science, Engineering and Technology introduce consistent and Panel Understanding Floods – Questions and Answers. specific planning controls A full copy of this document can be to manage flood risks. downloaded from: www.chiefscientist.qld.gov.au

3 The management of our floodplains is complex. Balancing the role of Part 1 has been developed to support Councils by offering interim fit- the floodplain from protection of agriculture and the environment, to for-purpose measures to ensure that potential flooding impacts are stimulating economic growth and supporting new population growth considered in the development assessment process. Part 1 has been is a difficult process to manage. Each has its role and arguably each is divided into four key parts: as important as the other. 1 Understanding To ensure that Queensland learns from the recent natural • Scale of impact from the 2010/2011 event disasters the Authority has partnered with the Department of • Structure of floodplains and river systems Local Government and Planning (DLGP) including Building Codes Queensland (BCQ), DERM and the Department of Community Safety 2 Analysis (DCS) to deliver a body of work supporting greater resilience and • Floodplain planning understanding of our floodplains and to better inform and influence 3 Implementation the land use planning process. • Floodplain Mapping An outcome of this partnership is the development of the two-part • Model Code Guideline, entitled Planning for stronger, more resilient floodplains. • Temporary State Planning Policy 2/11 The Guideline raises awareness and represents the start of a journey • Queensland Development Code to improve floodplain management throughout Queensland utilising the land use planning process. 4 Delivery • Proposed amendment process for existing planning Part 1 – Interim measures to support floodplain management in schemes existing planning schemes delivers a toolkit that includes interim As an interim solution, Part 1 does not offer a comprehensive solution planning scheme measures and supporting mapping to those Councils for managing new or existing development in floodplain areas. It who currently do not have any floodplain mapping. The mapping does however, offer those Councils and indeed applicants, additional has been produced with the support of DERM and the mapping scheme provisions to ensure that there is due consideration as to product provided represents an Interim Floodplain Assessment what and how a development proposes to respond to a potential Overlay (Floodplain Maps). The Guideline also identifies a clear flood impact. This toolkit does not replace or override any existing implementation path for those Councils that choose to adopt the engineering development standards, such as local road design interim code provisions and mapping. manuals or the Queensland Urban Drainage Manual. Critically, it Part 2 – Measures to support floodplain management in future also does not replace or diminish the need for disaster warning planning schemes provides more detailed floodplain assessment and response plans or evacuation procedures. Even after adopting guidance to Councils who are looking to prepare their new Planning the recommendations in this Guideline, people should not become Schemes under the Sustainable Planning Act 2009 (SPA). complacent to the risk of flood. In support of this process, the Authority has partnered with Banana Shire Council (BSC), a Council that was significantly affected by What is Part 2? events in December 2010/ January 2011. Together with the Fitzroy Part 2 of the Guideline builds upon the Part 1 work by providing Basin Association (FBA) the BSC will use both Part 1 and Part 2 to further guidance on integrating floodplain management principles help improve the management of floodplains through the land use and processes into future planning schemes. Across the State, planning process. Councils are currently in the process of preparing new planning schemes – either Queensland Planning Provision (QPP)-compliant Planning for stronger, more resilient floodplains is Planning Schemes in accordance with the requirements of the SPA, or a two-part Guideline to help introduce consistent under the superseded Integrated Planning Act 1997. Both planning and specific planning controls into the land use scheme formats will benefit from the Part 2 Guideline. planning framework. Part 2 – Measures to support floodplain management in future planning schemes delivers guidance on: 1. Undertaking flood investigations, including: Part 1 Part 2 • selecting the right investigation for each area • how to undertake the relevant flood investigation for your areas

• Baseline mapping • More detailed mapping 2. Land use strategies for development in existing infill and broad hectare areas, including: • Interim overlay provisions • QPP scheme provisions • undertaking a planning evaluation to balance flood hazard with other land use considerations to identify planning specific-flood risk • transition strategies for existing areas to respond to flood risk Existing Future • how a planning scheme can address the strategies 3. Example QPP-compliant planning scheme provisions developed from Scheme Scheme the land use strategies, including: • key considerations and example provisions for the strategic framework • model Zone codes that deliver the intent of the strategic framework and an Overlay code with additional provisions from the Model Code presented in Part 1. 4 4 1 Understanding Flooding snapshot 2010/2011 Overview of events 210 towns and suburbs were affected by flooding During July to December 2010, extremely heavy rainfall was 13 river catchments recorded their highest peak levels experienced across large parts of eastern Australia, with Queensland experiencing its wettest spring on record. This rain pattern was Total evacuation of a township, Theodore and influenced by the strongest La Niña affect in the Pacific Ocean since Condamine (twice) the mid 1970s and as a result, Queensland’s catchments were significantly saturated before major rain events occurred during Critical infrastructure was affected November 2010 to April 2011. Rockhampton airport was closed • On 25 December 2010, the Category 1 Tropical Cyclone Tasha Water purification systems were flooded hampering crossed the Queensland coast between Gordonvale and Ravenshoe clean up efforts and access to safe drinking water • Pre-existing weather conditions and sustained high rainfall between 23–28 December 2010 resulted in flooding in many parts of central 50,000 km of road requires rebuild or repair and southern Queensland Damage bill from summer 2010/2011 exceeds $6.8B • On 29 December 2010, Theodore was the first town to be fully evacuated in the history of Queensland. Condamine became the second township. Each was fully evacuated twice. • On 10 January 2011, the townships of Maryborough, Bundaberg and Gympie were affected by rising floodwaters, leading to the • On 13 January 2011, the Brisbane and Bremer Rivers peaked at widespread inundation of houses and businesses. Additionally, the 4.46 metres and 19.5 metres respectively. These were lower than Bruce Highway was cut in several locations 1974 flood levels but the flooding caused significant inundation in both cities • On 10 January 2011, exceptionally heavy rainfall intensified in Toowoomba, culminating in unprecedented flash flooding within • On 30 January 2011, Category 2 Tropical Cyclone Anthony crossed the Toowoomba’s Central Business District coast close to Bowen, battering the coastal strip between Townsville and Mackay, depositing significant rainfall on already saturated areas • On 10 January 2011, a further torrent of water hit the Lockyer Valley where the towns of Grantham, Murphy’s Creek, Postman’s • On 3 February 2011, Category 5 Severe Tropical Cyclone Yasi struck. Ridge, Withcott and Helidon were severely affected The largest severe cyclone to hit Queensland in recent times, it comprised a damaging core some 400 kilometres across with • On 11 January 2011, heavy rain continued in the Brisbane River associated severe weather activity across 1000 kilometres of coastline, catchment with flooding of Laidley and Forest Hill including a storm tide of more than five metres, peaking near Cardwell. • On 12 January 2011, the Bremer River in Ipswich had reached 18 metres while some low-lying Brisbane suburbs had already started to be inundated

2010/2011 Timeline of events

5 Flooding and floodplains Conversely, and as discussed in Section 3 – Implementation, flooding should be the most manageable type of natural disaster. Australia’s floodplains are the commercial, social and ecological arteries of the nation. As such they constitute a national asset: an History of floodplain management asset subject to damage when floods occur. Floodplain management in Australia has evolved through four Most of our towns and cities are located on floodplains, both inland successive phases: and coastal. This is an historical fact, principally for reasons associated with water supply, transportation, waste disposal, advantageous 1. structural works points for river crossings, access to productive soils or recreation purposes. Hence, these towns and cities subject to flooding from time 2. planning to time. 3. flood emergency management Over time, uses in these areas have also become entrenched and 4. all-embracing management in more recent times lifestyle, mobility and consumer sentiment has meant that these areas continue to be used for a range of During the structural works phase, predominantly in the 1970s, commercial, social and ecological purposes. While these uses remain, structural works (typically levees) were used to protect existing so too will the potential risks when floods occur. properties at risk. Little consideration was given to the use of levees and their potential impact on the environment, risk management Put simply, if we are to use floodplains for these purposes, we planning or even land use planning. However, in 1974 a series of need to acknowledge and plan for flooding in a way that improves severe floods in New South Wales, Victoria and Queensland caused resilience of our built form and encourages the safety and well being widespread and significant damage. The outcome was that a better for our communities and individuals. understanding and regulation of levees was required. In Australia, flooding can be caused by four different mechanisms: In the 1980s and 1990s the importance of flood emergency heavy rainfall, storm surge, tsunami and dam failure. Rainfall and management was brought into focus predominantly by the New storm surge flooding create the most common and significant threats South Wales Bogan River flood in April 1990 which required the to social and economic well being of flood-prone communities. forced evacuation of the town of Nyngan. Tsunami and dam failure can result in catastrophic damage and likely loss of life. The probability of this type of flooding in Australia is low. From the early 1990s the importance of an all-embracing approach to floodplain management was apparent with the States / Territories Thus, as devastating as recent events have been, they are not unique: being far more advanced than previously in an integrated approach to 77 floods were recorded in Australia in the last 35 years of the 20th floodplain management. century; eight major floods were recorded in Australia in the 19th century and six in the first decade of the 21st century. Nature will undoubtedly continue to surprise us. What exactly is floodplain management? Floodplains are generally the more fertile areas of the continent. A The objectives of floodplain management as determined by the significant proportion of Australia’s agricultural output is produced on Standing Committee on Agriculture and Resource Management floodplains including irrigated agriculture. Regular flooding of these (SCARM) are to: areas enhances agriculture by increasing soil moisture. • limit to acceptable levels the effect of flooding on the well-being, Cost of flooding health and safety of flood-prone land, individuals and communities In Australia, floods are the most expensive type of natural disaster • limit to acceptable levels the damage caused by flooding to private with direct costs for the period from 1967 to 2005 estimated at an and public property 1 average of $377 million per year (calculated in 2008 dollars). • ensure that the natural function of the floodplain – to convey and Until recently, the most expensive year for floods in Australia store floodwaters during a flood – is preserved was 1974, when floods affecting New South Wales, Victoria and • encourage the planning and use of floodplains as a valuable and Queensland resulted in a total damage bill in today’s figures of sustainable resource capable of multiple, but compatible, land uses $2.9 billion. The Queensland Government estimates costs for the of benefit to the community 2010/2011 floods will exceed this figure with the damage to local government infrastructure estimated at $2.5 billion and the total damage to public infrastructure across the State at $6.8 billion.

1 Floodplain Management in Australia, Best Practice Principles and Guidelines, SCARM Report 73, CSIRO Publishing

What factors contribute to floods? Rainfall is the most important factor in creating a flood, but there are many other contributing factors. When rain falls on a catchment, the amount of rainwater that reaches the waterways depends on the characteristics of the catchment, particularly its size, shape and land use. Some rainfall is ‘captured’ by soil and vegetation, and the remainder enters waterways as flow. River characteristics such as size and shape, the vegetation in and around the river, and the presence of structures in and adjacent to the waterway all affect the level of water in the waterway.

6 Floodplain Management Process Understanding how our river systems work here in Queensland acknowledges that an integrated approach to land use planning on floodplains is required to bring together the diverse issues and stakeholders that affect, or are affected by, floodplain management. This approach takes flooding hazard and risk into account, along with all other relevant planning factors. The end product of this process is an approach to floodplain management that facilitates the use of the floodplain for appropriate purposes; limits flood risk, and damage to socially acceptable levels; enhances the waterway and floodplain environment; and fosters flood warning, response, evacuation, clean-up and recovery in the onset and aftermath of a flood. Ultimately the preferred way to manage our floodplains is through an integrated and appropriate mix of measures which are specific for each floodplain area. Floodplain Management in Australia – Best Practice Principles recommends the adoption of an approach to floodplain management at a total catchment (sub-basin) level beyond the LGA boundaries. The comprehensive floodplain management process typically encompasses three sequential stages2: • Flood Study – a technical investigation to determine the nature and extent of flooding Figure 2: Peak heights during the 2010/2011 summer event. • Floodplain Risk Management Study – an options assessment which Source: Bureau of Meteorology evaluates management measures and options for the floodplain in respect to both existing and future development • Floodplain Management Plan – formal adoption of a plan of management for the floodplain. Six major floods The time scale for this process can be in excess of 2 years and includes extensive community consultation. It is well understood that comprehensive community consultation throughout the floodplain occurred in Brisbane management process leads to greater community acceptance of the outcomes. Without appropriate community consultation the estimate between 1885 and of flood risk can often be incorrect. This Guideline should be seen as part of a continuum towards best practice in mapping and managing 1910, followed by risk in floodplains. more than 60 years without a major 2 Mark Babister, WMA Water, Natural Disaster Insurance Review August 2011 flood

Size of Flood (chance Probability of Experiencing the How do we estimate the of occurrence in any Given Flood in a Period of 70 Years chance of a flood occurring? year) ARI/ (AEP) At least once At least twice Understanding the chance of different sized 1 in 10 (10%) 99.9% 99.3% floods occurring is important for managing flood risk. The chance of a flood event 1 in 20 (5%) 97.0% 86.4% can be described using a variety of terms, 1 in 50 (2%) 75.3% 40.8% but the preferred method is the Annual 1 in 100 (1%) 50.3% 15.6% Exceedance Probability (AEP). A flood with a 1% AEP has a one in a hundred chance 1 in 200 (0.5%) 29.5% 4.9% of being exceeded in any year. Currently, the 1% AEP event is designated as having Probabilities of experiencing a given size flood once or more in a lifetime. Modified from Floodplain Development Manual: the management of flood liable land, NSW Government, 2005 an ‘acceptable’ risk for planning purposes nearly everywhere in Australia. However, ARI – Average recurrence interval good planning needs to consider more than AEP – Annual Exceedance Probability just the 1% AEP flood.

7 Understanding the River Systems Major river basins usually comprise multiple rivers that converge on the river after which the river basin is named. For example, the Understanding Australia’s river systems is integral to developing an Fitzroy River Basin includes the prominent rivers of Dawson and appropriate interim land use planning and mapping solution (Refer Nogoa, which drain into the Fitzroy River. Therefore, each river basin to Figure 3). This exercise has been instrumental to guide and direct is usually comprised of one or more sub-basins. Again, for example, how to best map, plan and therefore manage appropriate land use the Fitzroy River Basin is further divided into the following sub-basins: responses. • Isaac River Sub-Basin In Australia there are twelve drainage divisions. Drainage divisions do not stop at state or territory boundaries and they continue until they • Nogoa River Sub-Basin terminate at the sea, ocean or inland lake. • Comet River Sub-Basin Queensland hosts part of five (5) of these drainage divisions • Dawson River Sub-Basin including: • Mackenzie River Sub-Basin • Northeast Coast Division (1) • Fitzroy River Sub-Basin • Gulf of Carpentaria Division (9) Just like the major river basins, sub-basins do not correlate with LGA • Murray Darling Division (4) boundaries. • Bulloo – Bancannia Division (11) By understanding how our major river systems are governed, it can • Lake Eyre Division (10) help identify the best way to adopt a standardised approach to land use planning provisions. Given the importance of what happens Within each drainage division there are several major river basins. within a sub-basin, it is recommended that the best management Like the national drainage divisions, there are no river basins in of floodplains is for planning to be undertaken at a sub-basin level. Queensland that correlate with Local Government Areas (LGA). This means that every LGA is likely to have more than one sub-basin Therefore, the majority of Local Government Areas will contain within their LGA boundaries and the size of the sections of sub- several major river basins. There are 246 major river basins nationally, basins they contain will vary. This underlines the need for floodplain 75 of which are located in Queensland: management to be a collaborative exercise across LGA. The Part • Northeast Coast Division – 46 River Basins 2 Guideline considers this in further detail and provides specific guidance on the sub-basin wide approach to floodplain management. • Gulf of Carpentaria Division – 19 River Basins • Murray Darling Division – 5 River Basins • Bulloo – Bancannia Division – 1 River Basin • Lake Eyre Division – 4 River Basins Drainage Divisions Local Government boundaries do not correlate with river River Basins systems or basin boundaries.

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Original Size is A1 Datum: Horizontal - Geocentric Datum of Australia 1994 (GDA94) Y ve

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Interim Floodplain Assessment Overlay C m e Kogan

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Projection: Horizontal - Geocentricr Datum of Australia 1994 (GDA94) a e d Macalister © The State of Queensland (Department of Environment and Resource Management) 2011. Imagery © ESRI 2009. e Con Major Watercourses WARROOGraticule: Graticule lines are at 30 minute intervals v e e i k Produced for the Queensland Reconstruction Authority by the Department of Environment and Resource Management, November 2011. R k e W Technical enquiries: n i

PLANNING n l The Manager k o GIS Mapping Services (Client Outcomes), Spatial Information Group l i Department of Environment and Resource ManagementGauging Ba e SCHEMEGPO Box 2454, Brisbane QLD 4001 TARA Gauging Cr Co Map No.: g Station ee While every care is taken to ensure the accuracy of this data, the Department of Environment and Resource Management, and/or k k o e Station U PLANNING o n n R contributors to this publication, makes noNo.422220A representations or warranties about its accuracy, reliability, completeness or suitability for any re i particular purpose and disclaims all responsibility and all liability (including without limitation, liability in negligence) for all injuries, v C du expenses, losses, damages (including indirect or consequential damage) and costs which might be incurred as a result of the data No.422325A SCHEME ll e a a r l being inaccurate or incomplete in any way or for any reason. 1303.OVil ree k M ur C 148°30'0"E 149°0'0"E 149°30'0"E 150°0'0"E 150°30'0"E 151°0'0"E 8 Importantly, the preparation of the Floodplain Maps looks to the 2 Analysis establishment of a consistent approach across the State acknowledging that continued improvement and refinement of the mapping would The recent flood events seen across the State have highlighted the occur as more detailed and better information is collated. importance of considered land use planning that responds to the risks In terms of a maturity model for flood mapping, the Floodplain Maps presented by natural hazards and particularly flooding. are at level one and provide a framework for communities to decide As per current best practice principles the approach to floodplain priorities for more detailed flood investigations (Refer toFigure 4). management is best undertaken at a total catchment (sub-basin) level. This sub-basin approach is needed in order to manage effectively the Flood Mapping Maturity Levels result of existing development and the cumulative effects of future development on stormwater and mainstream flooding. It includes Level 0 No Flood Mapping both the upstream and downstream implications of proposed land use developments and floodplain management activities. Level 1 Sub-Basin ‘Interim Floodplain Assessment Overlay Mapping’ This approach requires collaboration from many stakeholders to support the ultimate goal of integrated management of our Level 2 Confirmed (by local govt) Floodplain Assessment floodplains and therefore should extend beyond the development Overlay Mapping assessment process. Level 3 Flood Investigations (sub-basin wide approach) Traditionally a flood study is a comprehensive technical investigation Level 4 Flood Risk Management Study of flooding behaviour that defines the extent, depth and velocity of Level 5 Implemented Floodplain Management Plan floodwaters for floods of various magnitudes. There are two principle components to a conventional flood study: The dataset to inform the Floodplain Maps was developed using the Hydrologic analysis or estimation of flood discharges for floods of various magnitudes. following overall principles: Hydraulic analysis or determination of the extent, depths and • suitability for a Statewide approach; velocities of flooding. • a consistent approach; This level of detail is not always required or necessary to facilitate • repeatable if more accurate data is available in the future and improved floodplain management particularly in areas where there is limited population and/or growth. The Part 2 Guideline • evidential and justifiable. provides further detail on an alternative fit-for-purpose approach The mapping produced through this approach has resulted in 116 of the understanding the need to ensure land use planning gives due 130 sub-basins across Queensland being mapped to at least Level 1 on consideration to flood hazard and flood risk particularly in the the flood maturity mapping model. Combined with existing mapping in preparation of future planning schemes. the other sub-basins this will represent full coverage of all relevant areas In recognition of the time and cost to prepare detailed flood mapping of the State. and studies by Councils, the Authority, with the support of DERM, commenced a State-wide mapping exercise to establish interim mapping of floodplains at a sub-basin level. Acknowledging the need to improve the availability and quality of flood mapping across the State focus was initially applied to large areas of the State where no flood mapping existed. The mapping exercise has resulted in the development of a State-wide product known as the Interim Floodplain Assessment Overlay (Floodplain Maps). Stronger, more resilient floodplains

Level 1

Interim Level 3 Level 0 Floodplain Level 2 Level 4 Level 5 No Flood Assessment Confirmed Flood Flood Risk Floodplain Mapping Overlay by Local Investigations Management Management (Floodplain Government (Sub-basin Studies Plan Maps & Code Level) Provisions)

Mitigation Works

Figure 4 – Flood Maturity Mapping Model Where appropriate

9 Floodplain Mapping Methodology Stream Orders A range of existing Statewide datasets were used in determining the Floodplain Maps. The mapping is not based on a particular Annual Starting at the headwater, the stream Exceedance Probability (AEP) event or Defined Flood Event (DFE) such as is assigned number one to be made a ‘1% /Q100’, nor does it represent the Probable Maximum Flood (PMF) 1st order. As several 1st order streams which is commonly derived through detailed flood studies to identify the converge the resultant stream becomes extent of the floodplain. The mapping also does not include or specify a 2nd order. Two 2nd order streams flood level or flood flow velocity. converging form a 3rd order, etc. This is known as the Strahler Method. The Instead, the mapping is generally based on various landform datasets number of orders in Queensland’s Sub- that represent or indicate previous inundation. It is a spatial extent Basins vary. The Dawson River sub-basin based on these datasets to determine an area of interest for potential for example is classified to a 9th order. flooding impacts. Given the mapping is based on a landform, the Flooding can occur in the headwater cartographic protocol of using a broken yellow line to indicate the streams (ie. 1st order), but is more likely floodplain extent has been used, rather than a solid blue line commonly to be significant in higher order streams. used to denote water features. For each sub-basin the appropriate The mapping was produced through a rigorous step-by step process that stream orders have been selected to use interrogated the available datasets: in developing the Floodplain Mapping. Step 1 – Identify each sub-basin and best available imagery Step 2 – Assess stream drainage classification levels in the basin Land zone 1 Step 3 – Identify areas that indicate alluvial systems, estuarine and marine deposits Step 4 – Identify stream gauges and their highest recorded levels Step 5 – Incorporate available 2011 flood lines Step 6 – Contours introduced as a constraint on soils and satellite flood general term: estuarine (tidal flats and beaches) lines datasets Quaternary estuarine and marine deposits subject to periodic Step 7 – Identify the IFAO extent using a visual estimation of the above inundation by saline or brackish marine waters. Includes data. mangroves, saltpans, off-shore tidal flats and tidal beaches. Importantly, the methodology provides for a consistent Statewide Soils are predominantly Hydrosols (saline muds, clays and approach to floodplain mapping, even in areas where high resolution sands) or beach sand. aerial photography, contour information or flood studies do not exist. Land zone 3 Imagery

Aerial imagery across the State is captured using different general term: alluvium (river and creek flats) modes. The most common is through Landsat 5. Landsat 5 is the fifth satellite of the Landsat program. It was launched on 1 Quaternary alluvial systems, including floodplains, alluvial March 1984, with the primary goal of providing a global archive plains, alluvial fans, terraces, levees, swamps, channels, closed of satellite images. The program is managed by United States depressions and fine textured palaeo-estuarine deposits. Geological Survey (USGS), and data from Landsat 5 is collected Also includes estuarine plains currently under fresh water and distributed from the USGS’s Center for Earth Resources influence, inland lakes and associated dune systems (lunettes). Observation and Science. Australia like many countries has Excludes talus slopes, colluvial deposits and pediments. an agreement with the USGS where new satellite imagery Includes a diverse range of soils, predominantly Vertosols and is downloaded every 16 days and provided to Geoscience Sodosols, also with Hydrosols in higher rainfall areas. Australia. The imagery has a pixel resolution of 30 metres. In addition to Landsat more detailed aerial photography captured at the time of a flood over a town and cities has been used SALI Soil Limitation Mapping where available. During the summer 2010/2011 events, approximately 100 towns were captured with high resolution Refers to a soil type which has a limitation of flooding. Soil aerial imagery. qualities and limitations are properties that can be assessed on an individual soil material basis and can affect the viability and sustainability of land uses. This is the largest mapping exercise currently underway in Australia. The Contours mapping has been undertaken at a Contour data with 10 metre vertical intervals available over sub-basin level. Many Councils have the whole State has been used. In some selected cases to aid the visual interpretation, other available contour information more than one sub-basin within their has been used. Local Government Area.

10 Stream Orders Example - Dawson River Sub-Basin What are Land Zones? The Floodplain Maps for the Dawson River Sub-Basin were derived using the following datasets: Land zones represent major • Landsat imagery differences in geology and in the • Stream orders 5 – 9 associated landforms, soils, and • Pre-cleared vegetation mapping of Landzones 1 & 3 combined with physical processes that gave rise to soil flooding limitation mapping distinctive landforms or continue to • Gauging stations shape them (Sattler and Williams • Flood extent for 2011 generated from aerial photography 1999). Land zones are generally • Aerial photography taken at or near flood peak derived by amalgamating a range • 10 metre contours of geological, land system and/or soil mapping units at 1:100 000 to 1:250 000 scale. Methodology for Once the floodplain maps have been captured they are provided to Councils as: Survey and Mapping of Regional Ecosystems and Vegetation • a Mapbook covering the whole sub-basin which includes a series Communities in Queensland. Version Land zone 1 of A3 Mapsheets at 1:50 000 scale in both electronic and hard copy 3.1. Updated September 2005. format; Queensland Herbarium • digital data compatible with geographic information systems (GIS) and • interactive lot and plan search.

Queensland Reconstruction Authority

Interim Floodplain Assessment Overlay Maps Dawson River Sub-Basin

Northeast Coast Drainage Division

148°30'0"E 149°0'0"E 149°30'0"E 150°0'0"E 150°30'0"E 151°0'0"E STYX RIVER Gauging Station k ee BROADSOUND r No.129001A

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23°30'0"S Station 23°30'0"S No.130113A Emerald MISC OTHER Gauging Bouldercombe Blackwater re ek h C Station No.130003B ISLANDS t Comet r Gauging o Bluff

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LEGEND MAP INFORMATION i No.422308C n n e C Gauging o reek Imagery: ESRI ArcGIS Online Imagery Basemap D gwood Cr INTERIM FLOODPLAIN ASSESSMENT OVERLAY Drainage Divisions g C e e k r SCHEME k Cadastre: Digital Cadastral Database (DCDB) is current at November 2011. Positional accuracy representing the Station e ee e Gauging Station r DAWSON RIVER SUB-BASIN 'maximum error' has been calculated at ± 57 metres. k Drainage Basins anga C No.422219A Warra Coor 2011 V1.1 Floodplain Assessment Overlay: For more information regarding the capture of this line please see the Foreword at the front of the Condamine No.422336A sub-basin atlases. !\ Gauging Station Dawson RiverWatercourses: Sub-BasinThe average accuracy of the data is plus or minus 25 metres in the horizontal position. 0 1 2 3 4 5 10 15 20 25 30 35 40 k

Planning Scheme Boundaries e Drainage Sub-Basin: Dawson River e

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r a Macalister e d © The State of Queensland (Department of Environment and Resource Management) 2011. Imagery © ESRI 2009. e Con e Major Watercourses WARROOGraticule: Graticule lines are at 30 minute intervals iv e k Produced for the Queensland Reconstruction Authority by the Department of Environment and Resource Management, November 2011. R k e W Technical enquiries: n i

PLANNINGThe Manager n l k GIS Mapping Services (Client Outcomes), Spatial Information Group o l i a e SCHEMEDepartment of Environment and Resource ManagementGauging B TARA GPO Box 2454, Brisbane QLD 4001 Gauging C Map No.: r Co Station e g While every care is taken to ensure the accuracy of this data, the Department of Environment and Resource Management, and/or k e o e Station U PLANNING k o n n R contributors to this publication, makes noNo.422220A representations or warranties about its accuracy, reliability, completeness or suitability for any re i particular purpose and disclaims all responsibility and all liability (including without limitation, liability in negligence) for all injuries, d Version 1.1 v C No.422325A u expenses, losses, damages (including indirect or consequential damage) and costs which might be incurred as a result of the data SCHEME e ll la a r being inaccurate or incomplete in any way or for any reason. 1303.OVil ree k M ur C 148°30'0"E 149°0'0"E 149°30'0"E 150°0'0"E 150°30'0"E 151°0'0"E

Tomorrow’s Queensland: strong, green, smart, healthy and fair

148°30'0"E 149°0'0"E 149°30'0"E 150°0'0"E 150°30'0"E 151°0'0"E STYX RIVER Gauging Station k e BROADSOUND re No.129001A

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PLANNING o Concili ati n Cree Biloela k ee k SCHEME Cr mbi t Rolleston Gauging Station Kroo

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s r ive SCHEME o R R o k n bi nso ree n C St Jo 25°30'0"S h 25°30'0"S Gauging n Cre k ek e e r Station y C d Ba No.130375A Redbank n ff le k a Cree S

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LEGEND n MAP INFORMATION n e C Gauging Do INTERIM FLOODPLAIN ASSESSMENT OVERLAY reek Imagery: ESRI ArcGIS Online Imagery Basemap gwood Cr Drainage Divisions g C e k r e SCHEME Cadastre: Digital Cadastral Database (DCDB) is current at November 2011. Positional accuracy representing the Station e eek e Gauging Station r DAWSON RIVER SUB-BASIN 'maximum error' has been calculated at ± 57 metres. k Drainage Basins anga C No.422219A Warra Coor 2011 V1.1 Floodplain Assessment Overlay: For more information regarding the capture of this line please see the Foreword at the front of the Condamine No.422336A sub-basin atlases. !\ Gauging Station Watercourses: The average accuracy of the data is plus or minus 25 metres in the horizontal position. 0 1 2 3 4 5 10 15 20 25 30 35 40 k

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PLANNING n l The Manager k o GIS Mapping Services (Client Outcomes), Spatial Information Group l i a e SCHEMEDepartment of Environment and Resource ManagementGauging B TARA GPO Box 2454, Brisbane QLD 4001 Gauging C Co Map No.: r g Station ee While every care is taken to ensure the accuracy of this data, the Department of Environment and Resource Management, and/or k k o e Station U PLANNING o n n R contributors to this publication, makes noNo.422220A representations or warranties about its accuracy, reliability, completeness or suitability for any re i particular purpose and disclaims all responsibility and all liability (including without limitation, liability in negligence) for all injuries, d v C No.422325A u SCHEME expenses, losses, damages (including indirect or consequential damage) and costs which might be incurred as a result of the data ll e la a r being inaccurate or incomplete in any way or for any reason. 1303.OVil ree k M ur C 148°30'0"E 149°0'0"E 149°30'0"E 150°0'0"E 150°30'0"E 151°0'0"E 3 Implementation The TSPP therefore gives effect for a Council to designate a NHMA (Flood) through a minor planning scheme amendment process. The Planning for stronger, more resilient floodplains is a journey mapping may be adopted either in the current form provided by the towards achieving better floodplain management through the land Authority, or as amended by the Council following local verification use planning process. Whilst not all Councils require assistance in of the mapping, provided that the amendment does not deviate from achieving this objective, some do and may benefit from the use of this the intent of the interim provisions and the purpose as outlined in Guideline. this Guideline and the TSPP. A Temporary Local Planning Instrument (TLPI) may also be an option for adoption of the mapping and code Floods are the most manageable of all natural disasters. Unlike other provisions however, the preference is for a minor scheme amendment natural disasters, generally there is an understanding of where floods process be followed. will occur and estimates of the likelihood of flooding, flood behaviour The TSPP commenced on 14 November 2011 and remains in effect and the consequences of flooding in some cases. On the other hand for a period of 12 months. It is expected that these amendments the unpredictability of Severe Tropical Cyclone Yasi meant it was not will be taken into consideration in the review of the SPP1/03 and an known when and where it would make landfall until just hours before amendment of SPP1/03 will be undertaken prior to the expiry of the it crossed the coast. Therefore, through a combination of learning TSPP. from the Yasi experience and analysing its aftermath, we can plan more efficiently for similar events and, at the same time, create more resilient communities. Interim Toolkit supporting the TSPP New Construction Standards Part 1 of this Guideline provides a voluntary interim toolkit which includes:- The Australian Building Codes Board has developed a draft national • Floodplain Maps prepared by the Authority in both digital and Standard for Construction of Buildings in Flood Hazard Areas (draft hard copy; and Standard), which is scheduled to be introduced into the Building Code of Australia (BCA) in 2013, following appropriate consultation. • the Model Code. The scope of the draft Standard is limited to class 1 (houses and It is acknowledged that not all local governments require this interim townhouses), class 2 (units and flats), class 3 (hotels, motels and toolkit. Councils with adequate provisions and mapping will not need backpackers), class 4 (caretakers dwelling), class 9a (health care) this Guideline. The response needs to be fit-for-purpose recognising and class 9c (aged care) buildings. It provides specific performance the differing needs of each local government. However, even for requirements and deemed-to-satisfy (DTS) provisions for the those Councils who feel that there are adequate provisions within design and construction of new buildings in a flood hazard area, as their existing scheme, the floodplain maps may help to: designated by the relevant authority (ie. Local Government). • inform the strategic planning process for the preparation of DLGP is proposing early adoption of the draft Standard as a new their new QPP compliant planning scheme; and mandatory part of the Queensland Development Code (QDC). Additional non-mandatory provisions, which are currently outside • identify areas that may require more detailed flood the scope of the draft Standard, are also proposed to be included investigations, particularly those areas where there is in the QDC to be adopted by Councils on a voluntary basis through existing or proposed critical infrastructure, transport and a planning scheme, Temporary Local Planning Instrument, or by communications linkages and other places of high economic resolution. It is proposed that the new QDC will apply to new buildings importance. and additions to existing buildings, but not generally to building alterations (for example, internal repairs such as adding a bathroom or For those Councils wishing to adopt the interim provisions, this can be removing a wall). done through incorporating a new section into the existing planning scheme, titled “Flood Hazard Overlay- Floodplain Assessment” and incorporating as a minor amendment to the planning scheme. Alternatively, a Council may use a TLPI however the minor Temporary State Planning Policy amendment process is preferred. The Authority partnered with DLGP to implement a new Temporary It is also important to note the adoption of the Floodplain Maps is not State Planning Policy 2/11 (TSPP) – Planning for stronger, more intended to alter the level of assessment for development within the resilient floodplains – which creates the statutory mechanism by overlay area. which a Council may look to adopt the Interim Floodplain Assessment Overlay as part of their existing planning scheme. The adopted Floodplain Maps are proposed to be used as a trigger for already Assessable Development to be assessed against the The TSPP suspends the effect of paragraphs A3.1 and A3.2 of Annex 3 Model Code. Any changes to the levels of assessment will require of State Planning Policy 1/03 Mitigating the Adverse Impacts of Flood, specific consideration by Council and DLGP as part of the amendment Bushfire and Landslide, which identifies the process by which a Council process. may designate a Natural Hazard Management Area (Flood) (NHMA). The effect of the TSPP is to allow amendments to an existing planning instrument under the SPA for a NHMA (Flood) to include: Mapping • land inundated by a Defined Flood Event (DFE) and identified in As outline in Section 2 of this Guideline the floodplain maps have a planning instrument; or been derived from a state-wide methodology using state-wide datasets. The datasets are available to Councils via a secure FTP • the Interim Floodplain Assessment Overlay mapping and Model service from the Spatial Information Group within DERM. The Code provided by the Queensland Reconstruction Authority; or data consists of a number of whole of state datasets and contour • the Interim Floodplain Assessment Overlay mapping and Model datasets specific to each sub-basin. There are staff members Code as amended by the relevant Local Government. within each Council who currently have access to the DERM FTP service via a secure login and password. Please contact DERM at [email protected] to request access to the datasets via the FTP service.

12 Planning scheme provisions – Model Code

To support the Floodplain Maps a Model Code has been prepared to support the assessment of development on land wholly or partially within the area shown on the Floodplain Maps. The Model Code is provided in Schedule 1. Councils may decide on the types of development to which the Model Code applies. The purpose of the code is to manage built form outcomes in the floodplain so that risks to life and property during future flood events are minimised, and to ensure that future development does not increase the potential for flood damage on site or any other property. For clarity and consistency, all development-related terms defined elsewhere in other Queensland legislation (such as the Sustainable Planning Act 2009, Dangerous Goods Safety Management Act 2001) have the same meaning in this Guideline and its Schedules. To demonstrate the practical application of this toolkit (including the Floodplain Maps and the Model Code) in a development assessment context, a number of case studies are provided following Schedule Brisbane River in flood 1974 Source: Queensland State Archives 1 of this Guideline. These identify how certain types of assessable development may be assessed against the Model Code. Minor Vs Major Amendment The TSPP allows for Councils to undertake a Planning Scheme amendment that can be considered as a Minor Amendment, in order to adopt the interim provisions as outlined in this Guideline. The Honourable Paul Lucas MP, Attorney-General, Minister for Local Government and Special Minister of State has agreed that where a Council uses the TSPP and this Guideline that the amendments will be considered under the Minor Scheme Amendment process under Statutory Guideline 02/09. However, where a Council seeks to undertake further amendments to the Planning Scheme, beyond the scope of those outlined in this Guideline, the amendment may be classified as a “Major Amendment”. Any change deemed to substantially deviate from the intent may need to undergo the Major Amendment process before being adopted into a Planning Scheme. To provide clarity, the Authority advises that an example of where an Brisbane River in flood 2011 Source: Queensland Reconstruction Authority amendment may not be considered as Minor would be a change to the Performance Outcomes identified in the Model Code. Councils can choose to amend the Acceptable Outcomes where it is necessary to deal with a localised issue. The Authority has established an arrangement with DLGP to support those Councils wishing to utilise this toolkit and amend their existing planning schemes. DLGP will lead the proposed amendments The Minister has and work closely with the Authority. The Authority and DERM will continue to provide support to Councils who are looking to refine agreed that where a the floodplain maps based on local verification. Guidance can also be provided to those Councils who are looking to further refine the Council uses the TSPP Model Code provisions to suit their local circumstance. Further advice on how Councils can utilise this toolkit is provided in and this Guideline that Section 4 - Delivery. the amendments will be considered under the Minor Scheme Amendment process.

13 4 Delivery

The following flow chart has been prepared to help Councils decide if the interim solution should be considered and adopted within their existing planning scheme.

Does the existing Integrated Planning Act 1997 Planning Scheme identify a Natural Hazard Management Area (Flood)?

YES NO

Does Council consider the Council will benefit from existing Planning Scheme using this toolkit to prepare provisions are sufficient to amendments for inclusion enhance the safety of people in its existing Planning and minimise damage to Scheme/s. property during flood events?

YES

No further action required.

Understanding the operation of the toolkit Incorporation into existing Planning Schemes

The toolkit includes the Floodplain Maps that for already assessable Existing Planning Schemes in Queensland utilise a number of development will trigger assessment against the additional provisions approaches to trigger additional provisions for certain areas and included in the Model Code. The toolkit can be incorporated into sensitive development within the LGA. Table 1 below provides a the planning scheme as a new section titled “Flood Hazard Overlay simplified explanation of how the toolkit might be incorporated into - Floodplain Assessment”. In other words, development identified different planning schemes across the State. within the specific mapped area (Floodplain Maps) will trigger an additional set of provisions (Model Code) that will be used to assess development applications within the overlay area. The terminology Existing planning scheme Incorporation method for the new section of the planning scheme will however be dependent on the existing structure of the scheme/s. Planning Scheme uses overlays which, Include an additional overlay in when assessing development in a the ‘Overlays’ part of the Planning The toolkit is not intended to change the level of assessment for particular (mapped) area to which the Scheme entitled ‘Flood Hazard development within the mapped overlay area. However, Councils overlay applies, triggers an additional Overlay - Floodplain Assessment’ set of provisions or regulation. which will include reference to the can use the toolkit to change levels of assessment to respond to Floodplain Maps and the additional localised issues or if their existing planning scheme/s change the level For example some Planning Schemes provisions included in the Model of assessment for overlay areas. Similarly, if an existing planning may include existing overlays such Code. as Acid Sulphate Soils Overlay, 625000 650000 675000 700000 725000 750000 775000 800000 825000 850000 875000 900000

er ek Yeppoon iv re R C ie nz ile The Caves Rosslyn e M k c e South Yaamba a lv Mulambin M e w schemeBROADSOUND SHIRE T already nominates Building Work as assessable development r (Pre-Amalgamtion) Fi ive LIVINGSTONE SHIRE tzroy R

7425000 (Pre-Amalgamtion) 7425000 Cawarral PEAK DOWNS SHIRE Emu Park (Pre-Amalgamtion) ISAAC REGIONAL Mount Chalmers WATERPARK CREEK B la SUB-BASIN ck wa te Keppel Sands r C NOGOA RIVER re e Conservation Overlay and Road and SUB-BASIN k Rockhampton WATERPARK a Rive L BASIN ogo r o N r r a in e C re MACKENZIE RIVER e k ROCKHAMPTON REGIONAL gton C FITZROY SHIRE SUB-BASIN in re r ek p (Pre-Amalgamtion) Kabra S

7400000 Stanwell 7400000 Fi then the Council tmayzr elect to apply this Guideline to Building Work in oy Macken FITZROY RIVER R i z v CURTIS ISLAND i e e SUB-BASIN r R SUB-BASIN i Creek v Blackwater th Bluff e or r Comet w k Bouldercombe c u D Rail Noise Impacts Overlay. rst Creek hu d n Westwood a S ek Dingo re C EMERALD SHIRE e Charlevu Mount Morgan (Pre-Amalgamtion) Gogango Bajool

Marmor B Duaringa C la 7375000 o c MOUNT MORGAN SHIRE 7375000 m k Boolburra e w k Raglan a e (Pre-Amalgamtion) t t e R e r iv r C e C e

r n r o e Pe B e arl C their existingk reek planning scheme. ek Cre C ek Ambrose rva ha re Mine rley C lan Cr g eek a R Mount Larcom Dululu DUARINGA SHIRE (Pre-Amalgamtion)

k Wowan e r re e v k C i e GLADSTONE REGIONAL e e R r

7350000 r 7350000 u e C s M e e g im D ntr rin osa C Ce p re S e k CALLIOPE SHIRE (Pre-Amalgamtion) Calliope River

Hu mb old t Creek

er iv Rannes Do n R CALLIOPE RIVER Woorabinda SUB-BASIN Be CENTRAL HIGHLANDS REGIONAL Goovigen ll Creek CALLIOPE 7325000 Baralaba BASIN 7325000 C Jambin en Planning Scheme does not include Include an additional code in the t ral Blac Creek kb oy C r e C e a l k l id e C Spring Creek re BOYNE RIVER ek Callide SUB-BASIN 7300000 7300000 Biloela oo reek Rolleston Kr mbit C ek k re e C an ‘Overlays’ section, rather uses the “Codes” Part of the Planning Scheme COMET RIVER re on C ati r cili SUB-BASIN o on te C Banana e M

K Thangool P i a K n a BAUHINIA SHIRE lan eek g ri et Cr a bo e Cre e Cr Cre B e ribo eek (Pre-Amalgamtion) ek a k Ka eek n rth Cr a No Bauhinia ia BANANA SHIRE n m a G a Moura C Z (Pre-Amalgamtion) re r ek e v k i l e l e k e r e a e C North East Coast r C C r n e o o e l o 7275000 k 7275000 e M Division u s e n re o h T C F Kia is n h g a C ‘Codes’ Part of the planning scheme entitled ‘Flood Hazard - Floodplain C r e re e e k k

ek e y C r ock R ek re C e m FITZROY so Moonford e r n BASIN e Lo iv Pum R p Cre n ek w o r B 7250000 ek 7250000 re C stle Performance a ly C C ul le G m y at k is c C o to identify area codes that are based Assessment Code’ which will act r MONTO SHIRE

R e River Rawbelle e arna k C r (Pre-Amalgamtion) vo n Creek BANANA k ee Cr r e b m e y ola N o og M o R iv e r Rawbelle

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r 7225000 o 7225000 w n UPPER BURNETT RIVER R i v e SUB-BASIN r on mapping and trigger additional as an area code and will include ree Bullaroo C k Creek angara Wal stle Ca Cre ined ek Ru Spring Creek Outcomes

P a lm T r Cracow R ee 7200000 o C 7200000 b re in ek so n C reek NORTH BURNETT REGIONAL Sa provisions for development within reference to the Floodplain Maps that rd ine Creek

St Jo BOORINGA SHIRE hn MARANOA RIVER C re (Pre-Amalgamtion) e SUB-BASIN on EIDSVOLD SHIRE k ws R iver Da (Pre-Amalgamtion) BURNETT + BASIN 7175000 7175000

B affle Creek Redbank that area. will trigger the additional provisions TAROOM SHIRE Taroom (Pre-Amalgamtion)

C n Cre o to e c t k k u a H Acceptable t oo C re ek 7150000 7150000

ek Cre june Creek In june Injune In Bungaban C BOYNE - AUBURN RIVERS ree included in the Model Code. k SUB-BASIN MUNDUBBERA SHIRE

reek (Pre-Amalgamtion) n C k aba e ng re Ah See Creek u C B e th n or ju N In er iv A R u b urn

k e e Creek r J n

7125000 C u o 7125000 a s For example some Planning Schemes k e n ree s n h C r d o mbah o a ro J Eu H h C

r Solutions e e k

BUNGIL SHIRE Baxter Gully k (Pre-Amalgamtion) e e r Wandoan C t n a r Cad G arg k MARANOA REGIONAL a Cree Jimmie Ho

7100000 r 7100000 se C may include existing area codes such r Gully e e B k k u e ng (e e ew a r Guluguba or s C g t

B o e r r e a a i b Acacia Cree C n e c le re h o e ) k W WESTERN DOWNS REGIONAL k ee k Cr CHINCHILLA SHIRE Cattle Creek h Juanda (Pre-Amalgamtion)

k e e D r a C rga a l C b ree le S 7075000 k u to 7075000 c Y k y k as Biodiversity Code, Heritage Place ek a e k r e e Murray Darling e d r r k e C C r C e i BALONNE RIVER e

l BENDEMERE SHIRE r r C r i r

BALONNE-CONDAMINE e u

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t a n k r SUB-BASIN y d r u l (Pre-Amalgamtion) o u BASIN B B o B w og D LEGEND MAP INFORMATION reek y C dle Imagery: Flying date of aerial photography: Unknown u Draft Flood Hazard Lines Photo details: ESRI ArcGIS Online Imagery Basemap MURILLA SHIRE N Pixel Sample Distance: Unknown CONDAMINE RIVER DRAFT FLOOD HAZARD LINES Drainage Divisions (Pre-Amalgamtion) Cadastre: Digital Cadastral Database (DCDB) is current at July 2011. SUB-BASIN Positional accuracy representing the 'maximum error' has been calculated at ± 57 metres. DAWSON RIVER SUB-BASIN Drainage Basins Drainage Sub-Basin: Dawson River Drainage Sub-Basins Dulacca All enquiries: FloodplainDrainage Basin: Fitzroy MapsDrillham Model Code Provisions The Manager GIS Mapping Services (Client Outcomes) Cadastre Drainage Division: North East Coast 7050000 Department of Environment and Resource Management Miles 7050000 GPO Box 2454, Brisbane QLD 4001 Datum: Horizontal - Geocentric Datum of Australia 1994 (GDA94) Pre-Amalgamation Local Government Boundaries Vertical - Australian Height Datum (AHD) 1971 Columboola Code and Aviation Area Code. While every care is taken to ensure the accuracy of this data, the Department of D Environment and Resource Management, and/or contributors to this publication, u Projection: Horizontal - Map Grid of Australia (MGA94), which is a standard Universal Transverse l Current Local Government Boundaries a makes no representations or warranties about its accuracy, reliability, completeness or Mercator (UTM) projection in Zone 55 with Central Meridian 147° East c suitability for any particular purpose and disclaims all responsibility and all liability c a (including without limitation, liability in negligence) for all injuries, expenses, losses, Major Watercourses Graticule: Grid lines are at 25 kilometres intervals C damages (including indirect or consequential damage) and costs which might be r e incurred as a result of the data being inaccurate or incomplete in any way or for any reason. e ek k e Chinchilla Cr © The State of Queensland (Department of Environment and Resource Management) 2011. 0 12345 10 15 20 25 30 35 40 45 ys arle Kilometres h © Microsoft Corp 2009. C SCALE 1:500000 Produced by the Department of Environment and Resource Management, July 2011. Jandowae Original Size is A1 625000 650000 675000 700000 725000 750000 775000 800000 825000 850000 875000 900000 Flood Hazard Overlay Floodplain Assessment Table 1: Incorporation into existing planning schemes.

14 Process

If Councils decide this toolkit is applicable to their local government area, Councils can follow the steps below to adopt the Floodplain Maps and Model Code within their existing Planning Scheme.

Step 1 – Council Step 2 – Council Step 3 – Resolve to amend existing Step 4 – Nomination obtains the commences planning scheme to incorporate of NHMA (Flood) toolkit review and Floodplain Maps and Model Code under the TSPP Authority will either as provided or as amended visit the Council

Step 5 – Consider Step 6 – Forward Step 7 – Council designation of floor amendment package adopts amendments levels under the Building to DLGP (Regional into existing Regulation 2006. Services Division) scheme/s.

Assessment of any new development applications triggered in the area nominated by the planning scheme mapping against the model code.

Step 1: Council obtains toolkit DERM have developed template mapsheets and this can be provided to Councils for preparation of their new planning scheme reference The Authority will provide each Council with the toolkit, containing:- map. This will also include the symbology to be used for the a. Guideline categories identified above. An example of this mapping is included at Schedule 2. b. Model Code Councils are also encouraged to review the Model Code for c. Floodplain Mapping appropriateness in the local context, and to make amendments to i. Hard copy mapbook the wording if required. Councils should note the comments provided regarding the Minor Scheme amendment process. ii. Digital copy mapbook iii. Digital datasets Step 3: Council resolution d. Templates for scheme amendment process Council resolves to undertake a minor scheme amendment to either: a. Adopt mapping and model code as provided by the Authority Step 2: Council commences review process unchanged; or Once the toolkit is obtained, Councils are encouraged to commence b. Adopt model code as provided by the Authority and adopt reviewing both the mapping and the model code provisions. The locally amended mapping; or Authority will also visit each Council once the mapping has been completed. c. Adopt mapping as provided by the Authority and adopt amended Model Code; or In reviewing the mapping, Councils are encouraged to utilise existing flood studies, records, photographs and local knowledge to visually d. Adopt locally amended mapping and amended Model Code. inspect and ground truth the floodplain mapping. Councils can choose to adopt either of the options or a combination In finalising any amendments made to the mapping, Council is to of the above to all planning schemes applicable in their jurisdiction. use the following mapping specification/ categories to ensure that A template Council resolution is available from the Authority that the source of the information is clearly identified and distinguishable includes the appropriate terminology to assist Council in preparing against the various methodologies that have been used: the resolution required to resolve to adopt the mapping and model a. Floodplain Assessment – for use where Council does not code. propose to amend the floodplain mapping prior to inclusion in Where amendments are proposed either under b), c) or d) above, the planning scheme. Council should outline the basis for the amendments (ie. based on a b. Locally Verified – for use where local information exists and localised flood study) as identified through Step 2 above. the parts of the floodplain mapping has been refined to reflect During the amendment process to either the floodplain mapping / this. This local information can include mapped floodlines, model code provisions, the Authority can assist Councils in making historic flooding and information sourced from consultants. any refinements. The mapping refinement process is further outlined c. Flood Study – for use where an existing flood study exists that in Schedule 2 of this Guideline. has been used to review the floodplain mapping.

15 Step 4: NHMA (Flood) Step 6: Minor scheme amendment package to In accordance with the TSPP, Council may resolve to adopt either all or DLGP only part of the mapped floodplain area as an NHMA (Flood) for the The Council forwards to DLGP a minor scheme amendment package(s) purposes of applying the relevant building provisions specified under for each of the planning schemes where amendments are proposed. the Building Act 1975. If the amendment package is proposed under option a in Step 3 For example, Council may wish only to designate those mapped areas above, DLGP will fast-track the amendment if no change is proposed within towns as an NHMA (Flood) – this way, the building assessment to either the mapping or the Model Code provisions. provisions will only apply to development within those urban areas, rather than applying in all areas that are mapped. If Council elects to proceed with option b), c) or d) from Step 3 above, DLGP will refer the amendment package to Authority for review. For clarity, areas that are mapped within the planning scheme but not designated as the NHMA (Flood) will still trigger the development The Authority will liaise with DERM to confirm any amendments assessment provisions (i.e. the Model Code) where they are called or refinements to the IFAO mapping and update the State-wide up in the planning scheme, but will not trigger the relevant building information with the proposed amendments. assessment provisions. The Authority will review any such amendments within 5 business days of receipt from DLGP. DLGP will then provide to the Minister for consideration, the Step 5: Setting floor levels minor scheme amendment package within 10 business days from To bring the relevant building assessment provisions into effect, either receipt of a package provided under option a) or following Councils also need to give consideration to determining appropriate confirmation from the Authority that the amendments are floor levels for habitable rooms in accordance with section 13 of the appropriate. Building Regulation 2006. This combination of both the mapped NHMA (Flood) area(s) in the planning scheme and the adoption of floor levels for habitable rooms Step 7: Incorporation into planning schemes will trigger the relevant building assessment provisions for the areas Once consideration has been made by the Minister and approval mapped as the NHMA (Flood). granted, Council will need to resolve to incorporate the approved planning scheme amendments into the applicable planning schemes. This floor level may be based on an historic flood (such as the highest Once adopted, any new applications triggered in the area nominated recorded) in a particular location, or other level as determined to by the new planning scheme mapping will be assessed against the be appropriate by the Council. Council will also need to ensure this new code. Councils are encouraged to continue to amend their floor level includes a ‘freeboard’ level – an additional height above schemes when further information such as through the completion of the flood level to provide a factor of safety – of 300mm above the more detailed flood investigations. selected flood height level. Table 2 may assist in determining how to adopt a level within a local government area. Please note that this above advice relates to the building assessment Council’s may undertake provisions currently in force in Queensland. The Implementation section of this Guideline noted the early adoption of the draft minor scheme amendments National Standard for Construction of Buildings in Flood Hazard Areas into the QDC. This is expected in early 2012. Once the relevant as required to reflect provisions are adopted into the QDC, there may be changes to the way in which the relevant building assessment provisions related to updated flood mapping. flood will be triggered.

DATA APPLICATION Historical Where historical flood data exists, it may be possible to Flood Data use this information to help inform the adoption of a level. Floods can vary in size Historical data may include: ••formally recorded gauge height records for a number of Flood magnitudes are usually classified by their height, and floods; the Bureau of Meteorology uses three general categories of ••formally surveyed peak flood levels throughout the area flooding related to water level: of interest; ••photographs of a historical flood; Major: This causes inundation of large areas, isolating towns ••‘high-water’ marks recorded on public or private and cities. Major disruptions occur to road and rail links. property; and Evacuation of many houses and business premises may be ••interviews with long-term residents. required. In rural areas, widespread flooding of farmland is Existing A number of river systems in Queensland have been the Flood Studies subject of a flood study. In many cases, these studies were likely. either limited in their scope or performed a number of years ago. Ideally, they should be updated with current data Moderate: This causes the inundation of low lying areas and techniques and/or extended to cover the full range of requiring the removal of stock and/or the evacuation of some floods and incorporate catchment development changes as well as future scenarios. houses. Main traffic bridges may be closed by floodwaters. Topography There may be circumstances where the topography Minor: This causes inconvenience such as closing of minor suggests floods are not an issue (i.e. large elevated areas such as plateaus with no significant watercourses). Care roads and the submergence of low level bridges and makes should be taken in making such a determination, as land the removal of pumps located adjacent to the river necessary. subject to flood hazards is not always obvious. Table 2: Data sources to support adoption of floor levels.

16 Built Form Managing flood risk can be delivered through both planning scheme and non-planning scheme measures. During Summer 2010/2011 we witnessed just how well our built form performed. It was evident that the traditional ‘Queenslander’ style home provided the best built form outcome. This is expected given that the traditional ‘Queenslander’ was designed to allow the cool breezes to circulate through the house in the hot summer and to let flood waters flow underneath. Since the Summer events we have seen many residents respond by lifting their homes to build in a level of immunity. This has been evident from the north in Hull Heads, to Condamine/ Dalby in the south-west to areas within Brisbane and Ipswich. The proposed amendments to the building standards will further support non-scheme measures which will further improve our communities ability to prepare, recover and respond to further flood impacts.

New house in Condamine (left) and house that has been raised in Dalby (right) after 2010 flood Source:- Queensland Reconstruction Authority

Above images sourced from:- Queensland Image Library and Getty Images Components of Flood Risk

Flood Risk How do we manage flood risks? Flood risk includes both the chance of an event taking place and its potential impact. Chance Consequence Land use planning informed by floodplain of a flood of a flood management plans can reduce risk for new development areas. Flood risk is harder to manage in existing developed areas; however modification measures such as dams or levees can change the behaviour of Exposure Vulnerability floodwaters. Similarly, property modification of a property/ communities to of a property/ communities to measures can protect against harm caused flood waters flood waters by floods to individual buildings, and response modification measures help communities deal with floods. Further Source:- Queensland Floods Science, Engineering and Technology Panel guidance on the management of flood risk is Understanding Floods – Questions and Answers provided in the Part 2 Guideline - Measures to support floodplain management in future planning schemes.

17 Schedule 1 – Model Code

1. Application This Code is an applicable code for assessable development prescribed by a level of assessment table in a zone , overlay and/or local plan and involving land wholly or partially within the area identified in the Flood Hazard Overlay- Floodplain Assessment maps provided at xxxxxx. This Code is a Queensland Planning Provision (QPP)-compliant Code. For the avoidance of doubt, the following QPP-specific terms in this Code have the following meanings under Integrated Planning Act 1997 (IPA)-compliant planning schemes:

QPP Compliant Term Corresponding IPA- compliant Term Overall Outcome Overall Outcome Performance Outcome Specific Outcome Acceptable Outcome Acceptable Solution/Probable Solution Zone Area, Precinct, Domain or District or other term commonly understood as a zoning mechanism

Compliance with the Acceptable Outcomes should not be regarded as satisfying all elements of the Performance Outcomes. The Code must be considered together with other relevant Planning Scheme codes that are applicable to the subject development.

2. Purpose The purpose of the Code is to manage development outcomes in the floodplain so that risk to life, property, community and the environment during future flood events is minimised, and to ensure that development does not increase the potential for flood damage on site or to other property.

3. overall Outcomes The purpose of the Code will be achieved through the following overall outcomes: a) Development maintains the safety of people on the development site from flood events and minimises the potential damage from flooding to property. b) Development does not result in adverse impacts on people’s safety, the environment or the capacity to use land within the floodplain.

4. Performance Outcomes and Acceptable Outcomes

Performance Outcomes Acceptable Outcomes

PO1. Development siting and For Material Change of Use layout responds to flooding AO1.1 New buildings are: potential and maintains personal safety at all times. 1 •• not located within the overlay area, or; •• located on the highest part of the site to minimise entrance of floodwaters; or •• elevated; and •• provided with clear and direct pedestrian and vehicle evacuation routes off the site. Note: If part of the site is outside the Flood Hazard Overlay area, this is the preferred location for all buildings.

For Reconfiguring a Lot AO1.2 New lots are: •• located outside the overlay area; or •• where possible, located on the highest part of the site to minimise entrance of floodwaters. Note: If part of the site is outside the Flood Hazard Overlay area, this is the preferred location for all lots (excluding park or other relevant open space and recreation lots). Note: Buildings subsequently developed on the lots created will need to comply with the relevant building assessment provisions under the Building Act 1975.

18 Performance Outcomes Acceptable Outcomes

Cont’d. PO1. Development siting AO1.3 Road and/or pathway layout provides a safe and clear evacuation path: and layout responds to flooding •• if a flood level is adopted2, by locating entry points into the reconfiguration above the flood potential and maintains personal level and avoiding culs-de-sac or other non-permeable layouts; or safety at all times. •• by direct and simple routes to main carriageways.

AO1.4 Signage is provided on site (regardless of whether land will be public or private ownership): •• indicating the position and path of all safe evacuation routes off the site; and •• if the site contains or is within 100m of a floodable waterway, hazard warning signage and depth indicators are also provided at key hazard points, such as at floodway crossings or entrances to low-lying reserves.

PO2. Development is resilient to For Material Change of Use (Residential Uses) flood events by ensuring design AO2.1 Residential dwellings are not constructed as single-storey slab on ground. and built form account for the potential risks of flooding. Note: The highset ‘Queenslander’-style house is a resilient low-density housing solution in floodplain areas. Higher density residential development should ensure only non-habitable rooms (e.g garages, laundries) are located on the ground floor.

AO2.2 Residential buildings: • use screening to ensure that the understory is not visible from the street; and • orient to the street by ensuring that the stairs to the dwelling and at least one habitable room overlook the street; and • have ground floors that allow for the flow through of flood water. Note: Commercial activities on the ground floor are acceptable where the ground floor has been specifically designed in accordance with the relevant building assessment provisions to include resilient materials and to be structurally appropriate. Note: The highset ‘Queenslander’-style house is a resilient low-density housing solution in floodplain areas. Higher density residential development should ensure only non-habitable rooms (e.g. garages, laundries) are located on the ground floor.

For Material Change of Use (Non-Residential Uses) AO2.3 Non residential buildings and structures: • orient to the street by activating the street frontage through ground floor commercial uses or urban design treatments such as recess wall treatments, screening and or landscaping; and • allow for flow through of flood waters on the ground floor. Note: Businesses should ensure that they have the necessary continuity plans in place to account for the potential need to relocate property prior to a flood event (e.g. allow enough time to transfer stock to the upstairs level of a building or off site). Performance Outcomes Acceptable Outcomes Note: The relevant building assessment provisions under the Building Act 1975 apply to all building PO1. Development siting and For Material Change of Use work within the Flood Hazard Overlay area and must take account of the flood potential within the layout responds to flooding AO1.1 New buildings are: area. potential and maintains personal Note: Resilient building materials for use within the Flood Hazard Overlay area should be 1 •• not located within the overlay area, or; safety at all times. determined in consultation with Council, in accordance with the relevant building assessment •• located on the highest part of the site to minimise entrance of floodwaters; or provisions. •• elevated; and PO3. Development directly, For Material Change of Use, Reconfiguring a Lot and Operational Works •• provided with clear and direct pedestrian and vehicle evacuation routes off the site. indirectly and cumulatively avoids AO3.1 Works in urban areas3 associated with the proposed development do not involve: Note: If part of the site is outside the Flood Hazard Overlay area, this is the preferred location for all any significant increase in water buildings. flow, velocity or flood level, and •• any physical alteration to a watercourse or floodway including vegetation clearing; or does not increase the potential for •• a net increase in filling. flood damage either on site or on For Reconfiguring a Lot 3 other properties.1 AO3.2 Works in areas other than an urban area either: AO1.2 New lots are: •• do not involve a net increase in filling greater than 50m3; or •• located outside the overlay area; or •• do not result in any reductions of on-site flood storage capacity and contain within the •• where possible, located on the highest part of the site to minimise entrance of floodwaters. subject site any changes to depth/duration/velocity of flood waters; or Note: If part of the site is outside the Flood Hazard Overlay area, this is the preferred location for all •• do not change flood characteristics outside the subject site in ways that result in: lots (excluding park or other relevant open space and recreation lots). o loss of flood storage; Note: Buildings subsequently developed on the lots created will need to comply with the relevant building assessment provisions under the Building Act 1975. o loss of/changes to flow paths; o acceleration or retardation of flows; or o any reduction in flood warning times elsewhere on the floodplain.

19 PO4. Development avoids the For Material Change of Use release of hazardous materials into AO4.1 Materials manufactured or stored on site are not hazardous in nature; or floodwaters. 2 AO4.2 If a flood level is adopted , material manufacturing equipment and containers are located above this level, or AO4.3 If a flood level is not adopted, material manufacturing equipment and containers are located on the highest part of the site to enhance flood immunity. Note: Refer to the Dangerous Goods Safety Management Act 2001 and associated Regulation, the Environmental Protection Act 1994 and the relevant building assessment provisions under the Building Act 1975 for requirements related to the manufacture and storage of hazardous substances.

PO5. Community Infrastructure is For Material Change of Use able to function effectively during AO5.1 No Acceptable Outcome specified. and immediately after flood events.

1 Council may chose to require the applicant submits a site-based flood study that investigates the impact of the development on the floodplain and demonstrates compliance with the relevant Performance Outcomes. 2 As resolved by Council under section 13 of the Building Regulation 2006. 3 As defined in the Sustainable Planning regulation 2009.

20 Case Study 1 PO4. Development avoids the For Material Change of Use release of hazardous materials into AO4.1 Materials manufactured or stored on site are not hazardous in nature; or Material Change of Use – Residential (Six Townhouses) floodwaters. 2 AO4.2 If a flood level is adopted , material manufacturing equipment and containers are located above this level, or Proposed Development: Site Location: AO4.3 If a flood level is not adopted, material manufacturing equipment and containers are located 6 x 3 storey townhouses with ground floor car on the highest part of the site to enhance flood immunity. Substantially within IFAO Floodplain Mapped Area accommodation Note: Refer to the Dangerous Goods Safety Management Act 2001 and associated Regulation, the Environmental Protection Act 1994 and the relevant building assessment provisions under Other Planning Considerations: Assessment against IFAO Model Code: the Building Act 1975 for requirements related to the manufacture and storage of hazardous Within relevant Zone in Planning Scheme that envisages higher density substances. This proposed development complies with the residential development Model Code, as: PO5. Community Infrastructure is For Material Change of Use • Council sought a flood/hydraulic study identifying a flood able to function effectively during AO5.1 No Acceptable Outcome specified. and immediately after flood events. level for the site, which the applicant provided • Buildings are elevated above this level and development has a simple direct evacuation route off site • Dwellings are not single storey slab on ground – habitable rooms are elevated through ground floor used as car accommodation • Site is in urban area and no alteration to watercourse or filling is proposed • No hazardous materials to be stored on site • Not a Community Infrastructure item

Application is supported by Council

Case Study 2 Reconfiguring a Lot – Residential (1 into 8)

Site Location: Proposed Development: Part of site within IFAO Floodplain Mapped Area Residential Subdivision 1 into 8 lots Other Planning Considerations: Assessment against IFAO Model Code: Within relevant Zone in Planning Scheme that envisages residential This proposed development complies with the Model Code, subdivision as: • Council requested verification of flood level through flood/ hydraulic study during application stage, which applicant provided • All proposed new lots located outside of IFAO Floodplain Mapped Area, with a balance park within the overlay area – while not mandatory, this is the most appropriate design outcome to ensure house lots will not be inundated • Road layout is direct and simple to allow for evacuation during flood • Appropriate signage is provided indicating evacuation routes • Site is in urban area and no alteration to watercourse or filling is proposed

Application is supported by Council

21 SCHEDULE 2 - Refinement (Local Verification) Process

Central Highlands Planning Schemes

On 7 November 2011, the Central Highlands Regional Council (CHRC) resolved to progress minor scheme amendments to all four of their existing planning schemes being the former Emerald, Bauhinia, Peak Downs and Duaringa Planning Schemes. The Authority, together with the Department of Environment and Resource Management (DERM), worked with the Council to undertake refinement to the Interim Floodplain Assessment Overlay (IFAO) relevant to the sub-basins within their local government area. Using local information such as data collated from the highest recorded flood event of December 2010, amendments to the mapping were completed. Categories for the mapping were developed to ensure that the source of the information is clearly identified and distinguishable against the various methodologies that have been used (Refer to section 4 - Delivery of the Guideline). For CHRC two categories were required being the Floodplain Assessment and Locally Verified. The Floodplain Assessment line was derived from the IFAO and identified as a blue hatch on the map. Where amendments to the IFAO were made based on local verification, it is identified asa green line (Refer to map examples below). In addition to the Flood Hazard Overlay maps for each scheme, CHRC had historical data for the township of Emerald which enabled the adoption of flood levels. These levels are reflective on a specific map for the Emerald townships ensuring that future Building Work would consider new floor levels based on the highest recorded event. The Authority and DERM worked with Department of Local Government and Planning (DLGP) to ensure that the resultant maps reflected the symbology consistent with Queensland Planning Provisions. DLGP’s Regional Services Division led the approval process for each of the minor scheme amendments. In December 2011, the Minister for Local Government’s approved the proposed minor scheme amendments. On 23 December 2011, Central Highlands Regional Council (CHRC) gazetted the amendments and became the first Council to utilise the Part 1 toolkit. Together with the Model Code provisions, all four of CHRC’s existing schemes now include the Flood Hazard Overlay - Floodplain Assessment maps and supporting code provisions.

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Legend R

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DCDB Parcel Boundaries L

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Verified Data R

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Minimum Habitable Finished Floor Level in D areas not shown in a Flood Hazard Overlay Area are to comply with the Building Act 1975 Floodplain Assessment Overlay Area Minimum Habitable Finished Floor Level is to be 0.3 m above the Defined Flood G

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Level as per Queensland Development Code E

G Minimum Habitable Finished Floor Level +0.3 m O R

Y above existing ground surface 176.9 176.4 176.6 177.9 Minimum Habitable Finished Floor Level +0.6 m 178 176.7 176.5 above existing ground surface 177.2 178.1 H

I G 177.3 178.2 H 177.9 Minimum Habitable Finished Floor Level W 178.3 A 177.4 178 Y in designated band 177.6 176.8 177.1 177.8 177.5 176.8 176.7 177 178.8 176.9 178.6 178.4 178.9 176.6

H 177.7 176.8 176.7 178.5 O

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P 176.9 177.2 I

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177.5 179.1 178.7 177.3 179 177.6

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Flood Hazard Overlay - Floodplain Assessment for the former Emerald Planning Scheme 179.5 178.1

179.4 178.3 178.2

Emerald 178.4 N HIGHWAY 179.8 179.3 CAPRICOR 179.6 178.5 180.5 Source: Central Highlands Regional Council D 178.7 A 178.6 O 180.6 180.3 R A 179.1 180.4 M 179.2 L 179.9 E 179.7 C S A P R 180.1 IC 180.7 180 O R 180.2 N 180.8 180.9 HIG 179.4 HW AY 180.7

181 180.6

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181.5 1 Based on the experiences learnt from the CHRC exercise, DERM have 0 180.8 2

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now established mapsheet templates that Councils can obtain to 182 _ C R

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prepare the proposed planning scheme maps. DERM together with j D A o O r

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the Authority have also developed a Mapping Specification providing z a H

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suitable for inclusion within the planning scheme. L C

Council has adopted AHD height (m) as represented by \ s p

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habitable floor level for the shown banded area in Emerald Town e g a m

relevant to the provisions of the Building Act 1975. i p M \ \ Digital Cadastral Database (DCDB) supplied Councils are encouraged to contact DERM [email protected]. FLOOD HAZARD OVERLAY by the Department of Environment and Resource Management November 2011.

- FLOODPLAIN ASSESSMENT While every care is taken to ensure the accuracy of this data, the Department of Environment and Resource Management, gov.au to discuss the proposed preparation of maps and to obtain a EMERALD SHIRE PLANNING SCHEME and/or contributors to this publication, makes no representations ´ or warranties about its accuracy, reliability, completeness or suitability for any particular purpose and disclaims all responsibility OVERLAY MAP NO. NDIS - 3 Scale 1:35,000 and all liability (including without limitation, liability in negligence) 500 250 0 500 1,000 1,500 for all injuries, expenses, losses, damages (including indirect or consequential damage) and costs which might be incurred as a copy of the Mapping Specification. Metres result of the data being inaccurate or incomplete in any way or for any reason. Original Size is A3

© The State of Queensland (Department of Environment and Resource Management)

22 Rockhampton Source: Queensland Image Library

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