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BUSHFIRE HAZARD ASSESSMENT AND MANAGEMENT
PLAN v1
J000542
LOT 9 ON RP225312
100 COOYAR STREET,
NOOSA HEADS, QLD
FOR
OZCARE
DECEMBER 2022
PO Box 9566 Pacific Paradise QLD 4564 / Email: [email protected]
ABN 60 625 108 625
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Full text of sections 2 to 42 (of 61)
Section 2
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
DOCUMENT CONTROL
Document: Bushfire Hazard Assessment & Management Plan
Client: Ozcare
Project Number: J000542
Project: Material Change of Use
Site: Lot 9 on RP225312
100 Cooyar St, NOOSA HEADS QLD 4567
File Ref: C:\ CLIENTS\OZCARE – 100 COOYAR STREET, NOOSA HEADS\04
REPORTING\02_BHAMP\Bushfire Hazard Assessment & Management Plan v1 –
100 Cooyar St NOOSA HEADS.docx
Version Date Distribution Author/s Approved
1 08/12/2022 Ashely Everton – Ethos J. Isaacs (B. Env Sc.) Joshua Lee
Urban Environmental Scientist; (B. Sc. AES, mEIANZ)
Joshua Lee - Director
(B. Sc. AES, mEIANZ,
mFPA, mESA)
- Director
DISCLAIMER
To the extent permitted by law, North Coast Environmental Services (including its employees, partners and consultants) excludes
all liability to any person for any consequences, including but not limited to all losses, damages, costs, expenses, and any other
compensation, arising directly or indirectly, from using this publication (in part or whole) and any information or material contained
in it.
© 2022 i
Section 3
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542 Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads Contents 1 INTRODUCTION 4 1.1 BACKGROUND 4 1.2 STATE PLANNING POLICY BUSHFIRE INTENSITY OVERLAY MAP 4 1.3 DEVELOPMENT PROPOSAL 4 2 SITE DESCRIPTION 5 2.1 GENERAL 5 2.2 TOPOGRAPHY 5 2.3 VEGETATION WITHIN THE SITE 6 2.4 VEGETATION EXTERNAL OF THE SITE 6 2.5 PAST FIRE HISTORY 7 3 HAZARD ASSESSMENT 8 3.1 HAZARD ASSESSMENT METHODOLOGY 8 3.1.1 LOCAL HAZARD AREA MAP 8 3.2 VEGETATION HAZARD CLASSES 9 3.2.1 VEGETATION HAZARD CLASS 22.1 – MELALEUCA OPEN FORESTS ON SEASONALLY INUNDATED LOWLAND COASTAL SWAMPS 9 3.2.2 VEGETATION HAZARD CLASS 29.2 – WOODLANDS ASSOCIATED WITH HEATHLANDS, SCRUBS AND SHRUBLANDS 9 3.2.3 VEGETATION HAZARD CLASS 34.5 – SEDGELAND DOMINATED WETLANDS 10 3.2.4 VEGETATION HAZARD CLASS 39.2 – LOW TO MODERATE TREE COVER IN BUILT UP AREAS 10 3.3 POTENTIAL BUSHFIRE INTENSITY CLASSES 13 3.4 BUSHFIRE HAZARD SUB-UNITS 13 3.5 OVERALL LOCAL HAZARD MAP 13 3.6 QUANTITATIVE MODELLING 16 4 BUSHFIRE RISK ASSESSMENT 20 4.1 METHODOLOGY 20 4.2 RISK FROM IDENTIFIED HAZARDOUS VEGETATION 21 5 BUSHFIRE IMPACT REDUCTION MEASURES 24 5.1 GENERAL 24 5.2 ASSET PROTECTION ZONES 24 5.2.1 GENERAL 24 5.2.2 AGED CARE FACILITY – ‘VULNERABLE USE’ SETBACK 24 5.3 WATER SUPPLY 25 5.4 FIRE BREAKS 25 5.5 VEHICULAR ACCESS 26 5.6 LANDSCAPING AND REGROWTH 27 5.7 GENERAL PROPERTY MAINTENANCE 28 5.8 BUSHFIRE EVACUATION 28 6 AUSTRALIAN STANDARD 3959:2018 CONSTRUCTION OF BUILDINGS IN BUSHFIRE PRONE AREAS (AS 3959:2018) SETBACKS 29 7 LEGISLATION AND OVERLAYS 31 © 2022 ii
Section 4
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542 Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads 7.1 NOOSA PLAN 2020 – NATURAL HAZARDS OVERLAY CODE 31 7.2 STATE PLANNING POLICY – NATURAL HAZARDS, RISK AND RESILIENCE 35 8 CONCLUSIONS 37 8.1 CERTIFICATION MATTERS 37 9 REFERENCES 38 APPENDIX 1 – SITE LAYOUT 39 APPENDIX 2 – EVACUATION PLAN 40 APPENDIX 3 – FIRE BREAK APPROVALS 41 APPENDIX 4 – RADINAT HEAT FLUX CALCULATIONS FOR PROPOSED SEPARATION 42 © 2022 iii
Section 5
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
1 INTRODUCTION
1.1 Background
This Bushfire Hazard Assessment and Management Plan has been prepared to assess and manage
the degree of potential bushfire hazard and associated risk acting on Lot 9 on RP225312 located at
100 Cooyar Street, Noosa Heads, QLD (herein referred to as ‘the site’). The site is the subject of a
Material Change of Use (MCU) development application to be submitted to Noosa Shire Council.
This assessment is to be used to assist Council with their decision-making process.
1.2 State Planning Policy Bushfire Intensity Overlay Map
The site is mapped under the State Planning Policy (SPP) (refer to Plate 1) as containing the
following Potential Bushfire Intensity areas:
High Potential Bushfire Intensity area;
Medium Potential Bushfire Intensity area; and
Potential Impact Buffer.
Plate 1 – SPP Bushfire Intensity Mapping Overlay
1.3 Development Proposal
It is understood the proponent seeks to conduct extensive renovations to the existing Aged Care
Facility onsite. No increase in the number of people living or congregating on premises is proposed.
The Plan of Development has been provided as Appendix 1.
The proposed development is a residential care facility and community care centre hence meets the
definition of a vulnerable use pursuant to Table 3 in the Department of Infrastructure, Local
Government and Planning’s Natural Hazards, Risk and Resilience –– Bushfire (December 2019)
State Planning Policy – state interest guidance material.
© 2022 4
Section 6
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
2 Site Description
2.1 General
The site is zoned as Community Facilities within the Noosa Plan 2020 and covers approximately 2.5
ha in the southern extent of the Noosa Heads area. The site currently supports Ozcare Noosa Heads
Aged Care Facility.
In general, the facility occupies the majority of the site hosting numerous buildings, carpark,
courtyards, and maintenance shed with only scattered mature trees present. Native bushland is
present within the northern and western site extents.
The site is bordered by Noosa National Park to the north and east, while residential and community
allotments are present to the southwest and west.
A cleared fire break is present to the immediate northeast and southeast of the site contained within
NSC land (refer BF01 & Section 5.4). Ozcare has entered into an Infrastructure Agreement with NSC
which enables Ozcare to maintain the firebreak in perpetuity at their expense (refer Appendix 3).
Plate 2 depicts the site’s position in the landscape and the extent of existing development.
Plate 2 – Site Context (Source: Nearmap 2022)
2.2 Topography
The slope of the land is a major determinant of fire behaviour, particularly the slope of the land
under vegetation that contributes to bushfire hazard. Fire burns faster as it travels up slope, via
preheating of unburnt fuels ahead of the fire, increasing the rateof spread and fireline intensity.
Conversely, fires move more slowly as they travel downslope. Fireline intensity (kW/m) is a function
of the rate of spread (QFES 2019).
The site is located on relatively flat terrain with a slight slope toward the northern and eastern
boundaries between 1-3 degrees.
© 2022 5
Section 7
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
The site reaches a topographic high of approximately 21m AHD about the western boundary and
declines through slopes of 1-3 degrees to the east to a low of 15m AHD.
No waterways are mapped or were observed onsite.
Plate 3 depicts topography conditions within and adjacent to the site.
Plate 3 – Site Topography (Source: Noosa IntraMaps)
2.3 Vegetation within the site
The majority of the site exhibits maintained areas with scattered mature trees and gardens, however,
a small unit of paperbark open forest is present in the northern site extent and a linear unit of Banksia
woodland is present along the western boundary.
2.4 Vegetation external of the site
Hazardous vegetation is located to the north through east to south of the site with additional
hazardous vegetation located to further to the south-west of the site beyond road based fire breaks.
Residential allotments exhibiting very limited woody vegetation dominate the landscape to the west.
Plate 4 depicts the general extent of bushland fuel sources surrounding the site. Vegetation hazard
characteristics are described in Section 3.2.
© 2022 6
Section 8
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
Open forest
Sedgeland
Woodland
Open forest
Woodland
Plate 4 – Dominant forest fire runs (Source: QLD Globe)
2.5 Past Fire History
Several prominent bushfires have occurred in the northern Sunshine Coast and Noosa region in
recent years. Successive extremely hot summers in the latter half of the 2010-2020 decade resulted
in severe fire events within the paperbark wetlands and heathlands on the eastern foreshore of Lake
Weyba, in the Peregian section of the Noosa National Park to the south of Noosa Springs as well at
Cooroibah. Smaller fires also occurred in the Girraween Nature Refuge immediately flanking the site
to the north-east and in a small urban bushland park to the north-west (presumedly an act of arson).
The severity and frequency of these events was largely unprecedented on the Sunshine Coast and
resulted in mass evacuations of local communities. These fires have temporarily reduced local fuel
loads whilst promoting fire prone vegetation regeneration. Post fire fuel loads can attain pre fire
volumes within +/- <5 years as a result of low decomposition rates and rapid regrowth following fire.
Therefore, the occurrence of a recent fire should not be misinterpreted to facilitate reduced fire risk
for any more than 2-3 years, particularly for heathland and paperbark communities. Three
successive La Nina wet seasons have followed the fires resulting in low fire risk conditions. The wet
seasons have exacerbated the recovery of fuel loads in the fire affected bushland noting many of
the affected heathland areas appear to have reattained significant fuel loads already.
© 2022 7
Section 9
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
3 HAZARD ASSESSMENT
3.1 Hazard Assessment Methodology
The Noosa Planning Scheme requires that a site-specific bushfire hazard assessment be prepared
to assess the degree of bushfire hazard on a site captured within a mapped Designated Bushfire
Hazard Area. The SPP Bushfire Prone Area mapping prevails over the Noosa Bushfire Hazard Area
mapping with respect to the currency of the methodology adopted to prepare the mapping.
Accordingly, the site-specific hazard mapping required is to be prepared consistent with the
methodology adopted to prepare the SPP mapping.
The methodology used to prepare the SPP mapping is described in:
Department of Infrastructure, Local Government and Planning’s Natural Hazards, Risk and
Resilience –– Bushfire (December 2019) State Planning Policy – state interest guidance
material; and
Queensland Fire and Emergency Services - (2019) Planning for Bushfire Resilient
Communities.
Site-specific hazard maps are referred to as Local Hazard Area Maps in the SPP documents. The
preparation of Local Hazard Area Maps has been undertaken for the site in accordance with the
methodology described in the above referenced documents.
3.1.1 Local Hazard Area Map
A Local Hazard Area Map was prepared by adopting the following methodology:
Categorizing the vegetation within the site in accordance with the vegetation hazard classes
derived from QFES (2019);
Using the patch and corridor filtering process to remove narrow corridors and small patches
of VHC’s1;
Subdividing the identified vegetation hazard classes into bushfire hazard sub-units based on
slope differences and vegetation hazard classes. All upslope and across slope vegetation
units are allocated an underlying slope of 1 degree as per methodology prescribed within
Queensland Fire and Emergency Services - (2019) Planning for Bushfire Resilient
Communities. The maximal slope recorded within 25m x 25m grids within the VHC’s is
adopted as the effective slope underlying the VHC. A conservative approach is adopted
where multiple slopes persist within VHC’s;
Assigning SPP Potential Bushfire Intensity classes to the sub-units;
Application of 100m Potential Impact Buffers to the amended sub-units to derive an overall
Local Hazard Area Map.
1
The patch and corridor filtering process to remove or downgrade hazard levels of small patches and narrow corridors involves the
following three stages:
Merging small patches of a single Vegetation Hazard Class less than 0.5 ha;
Merging small Vegetation Hazard Class patches between 0.5 and 1 ha with higher or moderate fuel loads (greater than 8
tonnes/ha); and
Removing narrow corridors of vegetation less than 50m wide through a process of patch erosion and dilation. These small
patches are merged with surrounding vegetation by allocating a patch to the Vegetation Hazard Class that is most common to
the patch boundary (Leonard et al., 2017).
© 2022 8
Section 10
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
3.2 Vegetation Hazard Classes
The following vegetation hazard classes (classified in accordance with QFES (2019)) were identified
within the assessment area which includes a 150m buffer surrounding the site:
Vegetation Hazard Class 22.1 – Melaleuca open forests on seasonally inundated lowland
coastal swamps;
Vegetation Hazard Class 29.2 – Woodlands associated with heathlands, scrubs and
shrublands;
Vegetation Hazard Class 34.5 – Sedgeland dominated wetlands; and
Vegetation Hazard Class 39.2 – Low to moderate tree cover in built-up areas.
The characteristics of each observed vegetation hazard class are described in the following sections
whilst Plan No. BF01 – Vegetation Hazard Classes depicts their distribution across the assessment
area.
3.2.1 Vegetation Hazard Class 22.1 – Melaleuca open forests on seasonally inundated
lowland coastal swamps
Vegetation Hazard Class 22.1 (VHC 22.1) is located in two units to the north and south of the
assessment area. The community exhibits an average canopy height of 20-25m with crown cover of
approximately 30-40%.
The canopy was dominated by Melaleuca quinquenervia (broad-leaved paperbark) but also
contained scattered Corymbia intermedia (pink bloodwood), and Acacia spp.
The mid-storey was characterised by rejuvenating paperbark, Banksia aemula (wallum banksia),
Allocasuarina littoralis (black sheoak), Glochidion sumatranum (cheese tree) and Lophostemon
confertus (brush box).
The understorey contained a mix assemblage of native grasses, shrubs and herbs and was
dominated by Blechnum indicum (bungwahl fern) in many areas.
VHC 22.1 is attributed a potential combined surface fuel load of 23.4 t/ha and a potential total fuel
load of 28.4 t/ha, and is classed as Prone Type 1 (QFES, 2019). Plate 5 depicts typical conditions
within VHC 22.1.
Plate 5 – Characteristic vegetation within VHC 22.1
3.2.2 Vegetation Hazard Class 29.2 – Woodlands associated with heathlands, scrubs and
shrublands
Vegetation Hazard Class 29.2 (VHC 29.2) is located in the southern and central extents of the
assessment area. The community exhibits an average canopy height of 10-16m with crown cover of
approximately 10-30%.
The canopy was dominated by Banksia aemula (wallum banksia) and Allocasuarina littoralis (back
she-oak). The mid-storey was characterised by rejuvenating B. aemula, Acacia spp., and
Pittosporum revolutum (forest pittosporum). The understorey is dominated by a range of native ferns,
© 2022 9
Section 11
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
sedges, shrubs and grasses with Xanthorrhoea johnsonii (grass tree) prevalent.
VHC 29.2 is attributed a potential combined surface fuel load of 16.8 t/ha and a potential total fuel
load of 24.3 t/ha, and is classed as Prone Type 1 (QFES, 2019). Plate 6 depicts typical conditions
within VHC 24.1.
Plate 6 – Characteristic vegetation within VHC 29.2
3.2.3 Vegetation Hazard Class 34.5 – Sedgeland dominated wetlands
Vegetation Hazard Class 34.5 (VHC 34.5) is located in the eastern extent of the assessment area.
This VHC consists of a dense association of low native wet coastal heath vegetation. Common
species included Blechnum indicum (bungwahl fern), Gahnia clarkei (sword sedge), Banksia fulva
(swamp banksia) and Melastoma affine (blue tongue).
VHC 34.5 is attributed a potential combined surface fuel load of 8 t/ha and a potential total fuel load
of 13 t/ha, and is classed as Prone Type 1 (QFES, 2019). Plate 7 depicts typical conditions within
VHC 34.5.
Plate 7 – Characteristic vegetation within VHC 34.5
3.2.4 Vegetation Hazard Class 39.2 – Low to moderate tree cover in built up areas
Vegetation Hazard Class 39.2 (VHC 39.2) is located across the majority of the site extent and
western extent of the assessment area. VHC 39.2 exhibited mature trees set amongst buildings and
maintained areas.
Mature tree species present include Allocasuarina littoralis (black sheoak), Melaleuca quinquenervia
(broad-leaved paperbark), Melaleuca Leucadendra (weeping paperbark), Bamboo spp.,
Lophostemon suaveolens (swamp box), palm spp., Macaranga tanarius, Glochidion ferdinandi
(cheese tree), and Acacia spp.
An area in the southern extent of the onsite VHC 39.2 unit has been recently cleared for bushfire
© 2022 10
Section 12
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
protection and is not depicted in the aerial imagery displayed in BF01 (refer Plate 9 VC01). This
clearing was undertaken as exempt clearing for bushfire protection under Schedule 6 of the Planning
Regulation 2017.
The mapped area of VHC 39.2 also encapsulates the recently installed fire break located in the
Noosa Council land to the immediate northeast and southeast of the site (refer Plate 10 & Section
5.4).
VHC 39.2 is attributed a potential combined surface fuel load of 5 t/ha and a potential total fuel load
of 8 t/ha, and is classed as Prone Type 3 (QFES, 2019). Plate 8 depicts typical conditions within
VHC 39.2.
Plate 8 – Characteristic vegetation within VHC 39.2
Plate 9 – Cleared area within VHC 39.2 not depicted in aerial imagery
Plate 10 – Cleared fire break within VHC 39.2
© 2022 11
Section 13
EGEND THE SITE 9RP225312 Limit of NSC Approved Fire Break 20m to East 15m to South VHC 22.1 - Vegetation Hazard Class 22.1 Melaleuca open forests on seasonally inundated lowland coastal swamps VHC 29.2 - Vegetation Hazard Class 29.2 Woodlands associated with heathlands, scrubs and shrublands VHC 34.5 Vegetation Hazard Class 34.5 Sedgeland dominated wetlands VHC 39.2 Vegetation Hazard Class 39.2 Low to moderate tree cover in built-up areas VAL) UNITS OF VEGETATION REMOVED v2 AS PER THE PATCH AND CORRIDOR FILTERING PROCESS /\ (Leonard et. al (2017) 0125 25 375 50 625 (A3) 1:2400 Cleared fire break adjacent to the sites north-eastern and south-eastern boundaries North Coast ~ oleae cae JOB: El Environmental POBox 9588 PaciieParatise a8 4564 | BUSHFIRE HAZARD ASSESSMENT VEGETATION HAZARD CLASSES J000542 BFOl A \ Wf Ss CIVIC SS ant constants Aan 0625 108828 1400 COOYAR STREET, NOOSA HEADS — . a seme 1:2400 @ A3 DATE |
Section 14
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542 Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads 3.3 Potential Bushfire Intensity classes Table 1 details the Potential Bushfire Intensity classes and their corresponding potential fire-line intensity (KW/m) values as prescribed within Leonard et. al. 2017. Table 1: Potential Bushfire Intensity classes 3.4 Bushfire Hazard Sub-Units A sub-unit level Local Hazard Area Map has been prepared; Plan No. BF02 – Sub-Units and identifies the site scale Potential Bushfire Intensity classes across the site. The sub-unit level Local Hazard Area Map identifies that High and Medium Potential Bushfire Intensity Areas associated with the VHC 22.1, 29.2, and 34.5 are located within the northern, southern, and eastern extents of the assessment area. Note, Sub Unit 4 comprises VHC 39.2 – Low to moderate tree cover in built-up areas. VHC 39.2 is classified as Prone Type 3 – Low hazard. As per Section 7.5.2, 7.6 & Figure 14 of Bushfire Resilient Communities 2019, Prone Type 3 VHC’s are not considered bushfire prone VHC’s. Therefore, Sub Unit 4 was mapped as Low Potential Bushfire Intensity class on BF02. 3.5 Overall Local Hazard Map An overall Local Hazard Map has been prepared; Plan No. BF03 – Local Hazard Map and identifies the Potential Bushfire Intensity classes across the site as well as associated 100m wide Potential Impact Buffer areas. High and Medium Potential Bushfire Intensity Areas are located within the northern, southern, and eastern extents of the assessment area with their asscoiated Potential Impact Buffer impacting the majority of the site precluding the central west site extent. The Local Hazard Map presented in Plan No. BF03 is to supersede the SPP broadscale mapping attributed to the site and should be used to guide the formulation of appropriate site-based bushfire management measures for the proposal. © 2022 13
Section 15
0125 25 375 50 625 125
——————
(A3) 1:2400
LEGEND
THE SITE LOW POTENTIAL BUSHFIRE INTENSITY VERY HIGH POTENTIAL BUSHFIRE INTENSITY
9RP225312
; 150m ASSESSMENT BUFFER MEDIUM POTENTIAL BUSHFIRE INTENSITY
' '
20m to East
15m to South
Limit of NSC Approved Fire Break [| HIGH POTENTIAL BUSHFIRE INTENSITY
Sub Unit 1 - Slope assessed as 1 degree due to Sub Unit being located across slope relevant to the development area.
(Fireline intensity calculated using Flamesol modelling adopting forest as the relevant vegetation type)
Combined . F
“ Surface and Fire Weather Maximum pore Potential
Vegetation Hazard Class Total Fuel . Landscape| Fireline
# ea Load (t/ha) Seve Slope Intensity StS
Surface Fuel (FFDI) (demees (kw/m) Intensity*
Load (t/ha)
VHC 22.1 - Melaleuca open
forests on seasonall
inundated lowland cas oe coe “3 s ae
swamps
Sub Unit 2 - Slope assessed as 1 degree due to Sub Unit being located across slope relevant to the development area.
(Fireline intensity calculated using Flamesol modelling adopting woodland as the relevant vegetation type)
ooo Maximum] Potential
. Surface and Fire Weather a Potential
Vegetation Hazard Class Total Fuel . Landscape| Fireline
# ea Load (t/ha) Seve Slope Intensity StS
Surface Fuel (FFDI) (demees (kw/m) Intensity*
Load (t/ha) s
VHC 29.2 - Woodlands
associated with heathlands, 16.8 24.3 48 1. 13,017 Medium
scrubs, and shrublands
Sub Unit 3 - Slope assessed as 1 degree due to Sub Unit being located across slope relevant to the development area.
(Fireline intensity calculated using Flamesol modelling adopting shrubland as the relevant vegetation type)
Seed Maximum] Potential
Vegetation Hazard Class BU eee Total Fuel oe eared Landscape Fireline vor pu
# Neal Load (t/ha) weveny Slope Intensi Bont
Surface Fuel (FFDI) (de ue vay Intensity*
Load (t/ha) Fy
VHC 34.5 - Sedgeland
dominated wetlands 8 13 48 1 20,621 [ver |
Sub Unit 4
Combined
- Maximum | Potential
Vegetation Hazard Class pute aie Total Fuel Fite Mental Landscape] Fireline nga
# Neat Load (t/ha) Se NEIEY Slope Intensi Busby
Surface Fuel (FFOD | ge ay ‘eu ae Intensity*
Load (t/ha) £
VHC 39.2 - hows to moderate 5 8 48 N/A N/A** ow.
‘tree cover in built-up areas
# From: Leonard, J., & Opie, K, (2017) Estimating the potential bushfire hazard of vegetation patches and corridors —
an enhancement of Queensland’s methodology for State-wide mapping of bushfire prone areas. CSIRO, Australia.
* From: Leonard, J., Newnham, G., Opie, K., and Blanchi, R. (2014) Anew methodology for state-wide mapping of
bushfire prone areas in Queensland. CSIRO, Australia.
** Fireline intensity, radiant heat flux, and busfhrie attack level are not calculated for non-bushfire prone VHCs
(grass fire prone VHCs (prone type = 2) orlow hazard VHCs (prone type = 3) as per Bushfire Resilient Communities
2019 Sections 7.5.2, 7.6 & Figure 14.
North Coz PROJECT TITLE Lia JOB: Lael Bia NC
fA En ental Poo 86 Paste Pate ls se: [BUSHFIRE HAZARD ASSESSMENT OZCARE SUB UNITS J000542 BFO2 A
yf PEIVICeS an hn, ABN: 60 625 108 625 1 00 COOYAR STRE EN, NOOSA HEADS A PRELIMINARY: _ 2022 2 = 2s moc nen er on army . SCALE 1:2400 @ A3 iN A
Section 16
EGEND THE SITE 9RP225312 150m ASSESSMENT BUFFER Limit of NSC Approved Fire Break 20m to East 15m to South LOW POTENTIAL BUSHFIRE INTENSITY MEDIUM POTENTIAL BUSHFIRE INTENSITY HIGH POTENTIAL BUSHFIRE INTENSITY VERY HIGH POTENTIAL BUSHFIRE INTENSITY OY POTENTIAL IMPACT BUFFER 0125 25 37.5 50 _625 125 a (A3) 1:2400 enn North Coast or SEM oY Environmental POBox 9586 PaciteParatise, aw 456+ | BUSHFIRE HAZARD ASSESSMENT LOCAL HAZARD MAP J000542 BFO3 A \ Wf SEMVICES connians Aenrene2s10882° 1100 COOYAR STREET, NOOSA HEADS ae a oe sas 1:2400 @A3
Section 17
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
3.6 Quantitative Modelling
Quantitative modelling of the potential bushfire conditions that may be experienced within the
VHC 22.1 open forest, VHC 29.2 woodland, and VHC 34.5 shrubland within the site and
adjoining the site has been undertaken to assist in determining the suitability of the
development and any asset setback requirements.
The models used comprise industry standard bushfire equations which have been built into
the FPAA endorsed FLAMESOL computer model. FLAMESOL allows numerous input
variables to be adjusted including fuel loads, fire danger index, site slope and distance to
vegetation. FLAMESOL uses the following algorithms:
Rate of Spread – McArthur (1973) and Nobel et al. (1980)
Flame Length – NSW Rural Fire Service (2001) and Nobel et al. (1980)
Elevation of Receiver – Douglas and Tan (2005)
Flame Angle – Douglas and Tan (2005)
Radian Heat Flux – Drysdale (1999), Sullivan et al. (2003) and Douglas and Tan (2005)
The FLAMESOL Minimum Distance calculator has been used and comprises an AS
3959:2018 Method 2 (Appendix B) based calculator which will determine standard bushfire
behaviour variables as well as the minimum distances required to achieve a range of different
radiant heat levels (represented by BAL's).
Fuel load inputs have been drawn from Planning for Bushfire Resilient Communities (QFES
2019) based on the calculated potential fuel loads for the following;
VHC 22.1 (23.4 t/ha surface and near surface fuels and 28.4 t/ha total fuels);
VHC 29.2 (16.8 t/ha surface and near surface fuels and 24.3 t/ha total fuels); and
VHC 34.5 (8 t/ha surface and near surface fuels and 13 t/ha total fuels).
A 1º effective slope was adopted for the slope underlying all sub units given across slope
conditions underlying the vegetation.
The default Flame Width of 100m was chosen for all units.
A Forest Fire Danger Index (FFDI) of 48 has been adopted for the site consistent with the
assignment by QFES (Catalyst 2020) (refer Plate 11).
Plate 11 – FFDI (Source: QFES redi Map)
The Flamesol output results are shown in Plates 12-14.
© 2021 16
Section 18
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
Plate 12 – VHC 22.1 (SUB UNIT 1) – 1 degree – 100m Flame Width
© 2022 17
Section 19
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
Plate 13 – VHC 29.2 (SUB UNIT 2) – 1 degree – 100m Flame Width
© 2022 18
Section 20
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
Plate 14 – VHC 34.5 (SUB UNIT 3) – 1 degree – 100m Flame Width
© 2022 19
Section 21
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
4 BUSHFIRE RISK ASSESSMENT
4.1 Methodology
A bushfire risk assessment for the proposed building areas has been prepared generally in
accordance with State Planning Policy – State Interest Guideline – Natural Hazards, Risk and
Resilience (DILGP, 2016) and AS/NZS ISO 31000:2018 – Risk Management Methodology.
The bushfire risk assessment details the likelihood that the proposed development will be
exposed to radiant heat impact considering the proximity to bushfire prone vegetation and
likely bushfire behaviour. Plate 15 illustrates the main bushfire attack mechanisms acting on
buildings.
Plate 15 – Figure A 5.1 Bushfire attack mechanisms (Planning for Bush Fire Protection, 2006)
According to AS/NZS ISO 31000:2018, a ‘hazard’ is defined as a source of potential harm or
a situation with a potential to cause loss, whereas a ‘risk’ is the chance of something
happening that will have an impact on objectives measured in terms of consequences and
likelihood. The State Planning Policy – State Interest Guideline – Natural Hazards, Risk and
Resilience (DILGP, April 2016) refers to ‘acceptable risk’, ‘tolerable risk’, and ‘intolerable risk’
which are defined below.
Acceptable risk
o A risk that, following an understanding of the likelihood and consequences, is
sufficiently low to require no new treatments or actions to reduce risk further.
Individuals and society can live with this risk without feeling the necessity to
reduce the risks any further.
Tolerable risk
o A risk that, following an understanding of the likelihood and consequences, is
low enough to allow the exposure to continue, and at the same time high
enough to require new treatments or actions to reduce risk. Society can live
with this risk but believe that as much as is reasonably practical should be done
to reduce the risks further.
Intolerable risk
o A risk that, following an understanding of the likelihood and consequences, is
so high that it requires actions to avoid or reduce the risk. Individuals and
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
society will not accept this risk and measures are to be put in place to reduce
risks to at least a tolerable level.
Section 9.4 of the QFES Bushfire Resilient Communities 2019 references radiant heat flux
exposure of <10kW/m² on the development footprint plan as generating an Acceptable to
Tolerable level of risk for vulnerable uses.
AS/NZS ISO 31000:2018 defines ‘Likelihood’ as the chance that something might happen.
Likelihood can be defined, determined, or measured objectively or subjectively and can be
expressed either qualitatively or quantitatively (using mathematics). The following ‘likelihood’
categories for the probability of the assessed bushfire attack mechanisms impacting the
assessment area have been adopted within this assessment:
Likely - Will probably occur
Unlikely - Could occur but doubtful
The determination of whether a bushfire event is likely or unlikely to occur (i.e., impact the
site) has been based on the relative position of hazardous vegetation to the site. Hazardous
vegetation located upwind of the site under typical south-east Queensland (SEQ) seasonal
fire winds from the north to north-west to west to south-west are deemed to be exposed to a
‘likely’ probability of impact. Hazardous vegetation located downwind of the site under typical
SEQ seasonal fire winds are deemed to be exposed to an ‘unlikely’ probability of impact.
4.2 Risk from Identified Hazardous Vegetation
Hazardous vegetation is positioned to the north, south, and east of the development. The
likelihood of a fire head approaching from these directions is typically considered unlikely,
given dominant regional fire weather winds are typically derived from the north-west to west
to south-west in SEQ. A fire front being directed by such winds could be expected to burn
eastward away from the site with the site exposed to the flanks of any such fire front rather
than the fire head. Nonetheless fire movement and wind patterns during a fire can be
unpredictable and given the extent of bushland to the north, south and east of the site and
forecast increases in bushfire weather severity as a result of climate change, a conservative
approach should be adopted, and the Likelihood risk assigned as Likely meaning that a fire
impacting the site will probably occur at some time in the future.
The degree of separation offered to the adjoining vegetation is the primary driver of the
assigned level of consequential risk and was determined with consideration to the Flamesol
modelling output presented in Section 3.3.
The following minimum separation distances are required to the identified hazardous
vegetation to ensure the proposed development (edge of the building) is exposed to <10kW/m²
radiant heat flux as per the Flamesol modelling presented herein:
47.1m to SUB UNIT 1 (VHC 22.1);
38.4m to SUB UNIT 2 (VHC 29.2); and
31.6m to SUB UNIT 3 (VHC 34.5).
Figure BF04 – Setback Requirements has been prepared to depict the position of the
<10kW/m2 RHF contour emanating from the edge of the NSC firebreak surrounding the site
vs. the footprint of the proposed development. The majority of the proposed development
occupies the existing building footprint with only the southern extent of the proposed building
extending slightly beyond the existing development footprint. The proposed development
footprint intercepts the vulnerable use <10kW/m2 RHF setback requirement/contour to the to
the south by a maximum of approximately 7.8m and to the east by a maximum of
approximately 6m. The proposed degree of separation therefore exposes the future building
to >10kW/m2 RHF to the east and south.
Consequently, further modelling was undertaken to identify the specific radiant heat flux acting
on the building to facilitate an assessment of the acceptability of the degree of encroachment.
The modelling (refer Appendix 4 for full transcripts) identified the proposed separation exposes
the building to:
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
7.47kW/m2 RHF from VHC 22.1 to the north;
13.47kW/m2 RHF from VHC 29.2 to the south-east (based on 30.6m separation); and
12.89kW/m2 RHF from VHC 34.5 to the east (based on 25.6m separation).
Whilst the RHF exposure is >10kW/m2 the following circumstances are deemed to reduce the
potential severity of impact that may arise as a result of the identified risk (additional context
to the below mentioned circumstances is provided in Section 5).
All emergency services required during a bushfire event are located directly adjacent
to the site to the west including Noosa Heads Fire & Rescue Station, Noosa Heads
Police Station, and Queensland Ambulance Service;
The proposed development will be connected to town water hence have a pressurized
reliable supply of water in an emergency;
No increase in the number of people living or congregating on premises is proposed;
Formed sealed access points are available to the north and south perimeters of the
site and the development design proposes a continuous, level, unsealed, trafficable
firebreak trail along the eastern boundary which will connect to the sealed access
points, thereby facilitating direct access to a potential fire front for fire suppression
purposes (refer BF04 green linework);
The developer proposes to voluntarily design the building to the applicable AS3959
2018 BAL construction standard hence the building could be expected to withstand the
radiant heat flux and ember attack for the modelled bushfire conditions (refer Section
6);
Fire hydrants and fire hose reels will be installed along the eastern and southern
perimeters of the boundary, noting one is already present along the eastern elevation
of the existing building;
A specific Bushfire Evacuation Plan has been prepared for the project (refer NCES
BEP 2022) to assist in the management of people during a bushfire emergency;
A linear suite of low flammability trees have been retained within the NSC approved
fire break to the east (predominantly she-oaks and cheese trees) and within Ozcare
land to the south, which offer a low flammability radiant heat flux and ember screen
against fire and ember ingress from an encroaching fire; and
Future landscaping within the site can comprise low flammability species to further
reduce the likelihood of spot fires development adjacent to the building.
The degree of risk acting on the current building has been historically much higher prior to the
implementation of the current firebreaks and the new building represents only a slight
expansion on the existing building footprint. Therefore, with consideration given to the degree
of proposed separation approaching <10KW/m² RHF exposure and the above highlighted
mitigating factors, the overall risk acting on the proposed replacement building and people
therein could be reasonably argued to be Likely and Acceptable -Tolerable.
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EGEND THE SITE 9RP225312 150m ASSESSMENT BUFFER Limit of NSC Approved Fire Break 20m to East 15m to South MEDIUM POTENTIAL BUSHFIRE INTENSITY HIGH POTENTIAL BUSHFIRE INTENSITY LOCATION OF PROPOSED WORKS <10kW/m2 RHF VULNERABLE USE SETBACK REQUIREMENT | | EXISTING EMERGENCY ACCESS/FIRE BREAKS 0125 25 375 50 625 125 pees (A3) 1:2400 fami JOB: aN av NORTH: North Coast - PROJECT TITLE: MAererznrenta PO Box 9566 Pacific Paradise, aki. 4664 | BUSHFIRE HAZARD ASSESSMENT OZCARE — — 7 P:07 5450 5984 rov-eoess1082 1409 COOYAR STREET, NOOSA HEADS RIA , nee me 1-2400 @ #8
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
5 BUSHFIRE IMPACT REDUCTION MEASURES
5.1 General
The following section describes bushfire impact reduction measures to be incorporated into
the proposed development to reduce the risk of bushfire impacts to people and property.
Implementation of the identified measures is not implied nor intended to advocate that building
occupants remain on the site during a bushfire event, nor that people and property will be
protected from bushfire impacts. The measures are intended to reduce the potential severity
of bushfire impact to the development and not prevent bushfire impact. The bushfire mitigation
measures have been derived from:
Department of State Development, Manufacturing, Infrastructure and Planning’s State
Planning Policy – State interest guidance material – Natural hazards, risk and
resilience – Bushfire (December 2019) (referenced herein as SPP (Bushfire) 2019);
and
Queensland Fire and Emergency Services. (2019). Planning for Bushfire Resilient
Communities.
5.2 Asset Protection Zones
5.2.1 General
Asset Protection Zones (APZ) provide a defensive tool to assist in the reduction of potential
bushfire impact to people and property situated in bushfire prone areas. For illustrative
purposes, Plate 16 depicts the concept of an APZ surrounding a dwelling in a bushfire prone
area.
Plate 16 – Asset Protection Zones
The configuration of APZ’s is typically determined based on the results of the site-specific
hazard assessment including risk of bushfire impact, flame length analysis, applicable
AS3959-2018 Bushfire Attack Levels and State Planning Policy – State Interest Guidance
Material (Natural Hazards, Risks and Resilience – Bushfire) December 2019 Assessment
Benchmark setback requirements, with the latter the primary determining factor.
Confirmed bushfire hazard areas are located to the north, south, and east of the site hence
provision of adequate separation between the proposed buildings immediately flanking the
hazardous vegetation is required to provide a reasonable level of safety to site occupants and
emergency services staff.
5.2.2 Aged Care Facility – ‘Vulnerable Use’ Setback
There are no specific setback criteria for a Material Change of Use development application
under the NC Bushfire Hazard Overlay Code 2020.
State Planning Policy – State interest guidance material for natural hazards, risk and resilience
for bushfire considers aged care facilities to be a ‘vulnerable use’. Assessment Benchmark 3
in the SPP and Section 9.4 of the Bushfire Resilient Communities Technical Reference Guide
for the State Planning Policy State Interest ‘Natural Hazards, Risk and Resilience - Bushfire’,
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Section 26
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542 Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads reference that the applicable assets in the development footprint are to be separated from the closest edge of an adjacent mapped medium, high or very-high potential bushfire intensity area by a distance (APZ width) that achieves a radiant heat flux level of 10 kW/m2 or less at all development footprint boundaries. The proposed development footprint intercepts the modelled vulnerable use <10kW/m² RHF setback requirement to the east by a maximum of approximately 6m and to the south by a maximum of approximately 7.8m, noting the modelled <10kW/m² RHF contour was set from the external edge of the NSC firebreak adjoining the site. The risk assessment performed herein, which also considers other factors beyond just separation, has however identified that the level of risk acting on the development could be considered to facilitate an Acceptable to Tolerable risk of impact and therefore can be supported subject to implementation of the recommendations set herein. The extent of proposed separation is to constitute the extent of the recommended APZ for the development. This means the APZ is to extend from the building edge through to the limit of the NSC firebreak on the adjoining lot, which for clarity, extends 20m from the eastern site boundary and 15m from the southern site boundary. The conditions in the APZ are to managed for the life of the development and shall: 1. Comprise only low threat vegetation (for example grassland managed in a minimal fuel condition, maintained lawns, low flammability garden beds, pathways, open space area); 2. Are designed to ensure a potential available fuel load is maintained at less than 8 tonnes/hectare in aggregate and with a fuel structure that remains discontinuous; 3. Not include any other buildings between the new building and the limit of the APZ; and 4. Not include any timber based hard landscaping such as pergolas and breezeway framing which could facilitate a fire pathway from the adjacent vegetation onto the building. Ozcare is to be responsible for the maintenance of the APZ for the life of the development. 5.3 Water Supply The availability of a reliable water supply for firefighting purposes is a vital tool in the defence of bushfire impact. The site is currently connected to the Noosa Heads reticulated water supply which has a minimum pressure and flow of 10 litres a second at 200kPa. The new buildings will be connected to this supply and therefore the water supply design satisfies the NSC Bushfire Hazard Overlay Code requirements for water supply and that prescribed within the SPP. A fire hydrant and fire hose reel is recommended to be provided at the northern, central eastern and southern points of the site to aid in fire suppression activities. It is recommended that any new road components and fire hydrants are designed and installed in accordance with: 1. Fire Hydrant and Vehicle Access Guidelines for residential, commercial and industrial lots, Queensland Fire and Emergency Services, 2015, unless otherwise specified by the relevant water entity; and 2. The Road Planning and Design Manual 2nd edition, Department of Transport and Main Roads, 2013. Note: when relevant, the superseding versions will apply. 5.4 Fire Breaks The provision of fire breaks and fire trails within a site located in a bushfire prone area offers an important bushfire defence measure to assist in reducing the risk and severity of bushfire ingress onto and through a site. The establishment and management of a 20m fire break adjacent to the eastern site boundary (i.e., off-site) and a 15m fire break adjacent to the southern boundary has been recently approved by Noosa Council and constructed by Ozcare. The clearance and maintenance of © 2022 25
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
the firebreak was deemed a high priority recommendation from a hazard assessment
conducted by NCES on the existing site. The resultant fire break currently exhibits low threat
vegetation conditions but is subject to native flora regeneration including strong regeneration
of Blechnum indicum along the eastern limit of the fire break. This regeneration will require on
going management until the seed bank is exhausted and permanent grass cover can be
facilitated (refer Plate 17).
The approved fire break will provide the site with a formal fire break separating the buildings
and adjacent hazardous vegetation. The fire break provides the opportunity for RFS vehicle
access along the entire north, east and south peripheries of the site subject to installation of a
stormwater crossing point next to the central eastern elevation of the building. The fire break
trail will connect to sealed access services roads and then Cooyar Street to the north-west
and Langura street the south-west. Given the gentle grade of the fire break (1 degree) it is
expected that emergency access to the hazardous vegetation would be readily available.
Additionally, formed (sealed & unsealed) fire breaks are currently available to the south of the
site (refer BF04 green linework). These fire breaks can be accessed via Langura Street
offering alternative emergency access to the adjacent bushland.
No further fire break requirements are deemed necessary.
Plate 17 – Cleared fire break adjacent to the sites north-eastern (left) and south-eastern (right)
boundaries
5.5 Vehicular Access
Development in bushfire prone areas should be serviced by safe access/exit points for both
occupants and emergency services personnel. The Ozcare site is currently served by the
existing sealed site access points at the northern end of the site via Cooyar Street and the
southern end of the site via Langura Street. The proposed development retains the existing
access arrangements.
Emergency access to the bushland edge can therefore be gained from main entry/exit point
adjacent to the sites northern boundary and from the sealed access road (bitumen) stemming
from Langura Street to the southwest of the site (refer Plate 18).
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
Plate 18 – Existing emergency access route stemming from Langura Street (looking west)
Overall, the risk of access/egress becoming constrained within the site during a bushfire event
is deemed low. Specific additional road design recommendations for any new roads are
however deemed warranted and comprise:
The road design complies with the Fire Hydrant and Vehicle Access Guidelines for
residential, commercial and industrial lots, Queensland Fire and Emergency Services,
2015, unless otherwise specified by the relevant water entity.
5.6 Landscaping and Regrowth
Existing and future landscaping within the site should avoid increasing the potential for
bushfire hazard. Assessment benchmark 5 of the SPP Bushfire 2019 seeks that the site layout
places the landscape and open spaces within the site between premises and adjacent mapped
medium, high or very high potential bushfire intensity areas. This landscaping and open space
comprises protective landscape treatments that:
1. Comprise only low threat vegetation (for example grassland managed in a minimal fuel
condition, maintained lawns, golf courses and cultivated gardens); or
2. Are designed to ensure a potential available fuel load is maintained at less than 8
tonnes/hectare in aggregate and with a fuel structure that remains discontinuous.
To reduce the potential for bushfire impact to buildings, structures and occupants as a result
of future regrowth and landscaping works within the site, it is recommended:
Any landscaping within the nominated APZ’s satisfies Assessment Benchmark 5 of the
SPP Bushfire 2019, including the low threat vegetation criteria prescribed in section
2.2.3.2 of AS 3959:2018 or later iterations thereof;
No woody mulch is used within 2m of buildings;
No trees or shrubs are retained within 6m of the buildings;
Beyond 6m, any trees desired to be retained are to be continuously defoliated below
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
4m height above ground level and no limbs are to extend to within 6m of the roof line
of the buildings. All pruning should be undertaken in accordance with AS 4373 Pruning
of amenity trees;
Future landscaping works/plantings maximise the use of locally indigenous, low
flammability species within the site (i.e., additional planting within the southern
boundary windbreak). Landholders should consult their local native plant nursery for
suitable species selection; and
The approved fire break and access to the fire break is to be maintained and is to
consist of low threat understorey vegetation conditions (e.g., mown grass or similar) in
perpetuity.
5.7 General Property Maintenance
The undertaking of an appropriate level of property maintenance throughout the year, and in
particular prior to the fire season, can significantly reduce the severity of fire impact upon a
site. Queensland Fire and Emergency Services recommend the following general actions be
undertaken to prepare for the fire season:
Structure
Clear leaves, twigs, bark and other debris from the roof and gutters.
Purchase and test the effectiveness of gutter plugs.
Enclose open areas under decks and floors.
Install fine steel wire mesh screens on all windows, doors, vents and weep holes.
Point LPG cylinder relief valves away from the house.
Conduct maintenance checks on pumps, generators and water systems.
Seal all gaps in external roof and wall cladding.
Access
Display a prominent house or lot number, in case it is required in an emergency.
Ensure there is adequate access to your property for fire trucks - 4 metres wide by 4
metres high, with a turn-around area.
Vegetation
Reduce vegetation loads along the access path.
Mow your grass regularly.
Remove excess ground fuels and combustible material (long dry grass, dead leaves
and branches).
Trim low-lying branches two metres from the ground surrounding your home.
Note the above recommendations are that of QFES and are offered herein for advisory
purposes. They have not been set as recommendations for certification purposes.
5.8 Bushfire Evacuation
Given the extent of hazardous bushland in the vicinity of the site there is an inherent risk that
an evacuation of the site may be required to mitigate serious risk of impact to site occupants.
A Bushfire Evacuation Plan (BEP) has therefore been prepared to direct the evacuation of the
site (refer Appendix 2) and comprises an integral component of the measures prescribed
herein to manage bushfire safety on the site.
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
6 AUSTRALIAN STANDARD 3959:2018 CONSTRUCTION OF BUILDINGS IN
BUSHFIRE PRONE AREAS (AS 3959:2018) SETBACKS
In general, the majority of the site is mapped within the Bushfire Hazard Overlay in the Noosa
Plan 2020 (refer Plate 19) and SPP Bushfire Hazard Overlay Map (refer Plate 19).
Plate 19 – NSC Bushfire Hazard Overlay Mapping (Source: NSC IntraMaps)
NCC 2019 Amendment 1 July 2020, Performance Requirement P2.7.5 Buildings in bushfire
prone areas states:
A Class 1 building or a Class 10a building or deck associated with a Class 1 building that is
constructed in a designated bushfire prone area must, to the degree necessary, be designed
and constructed to reduce the risk of ignition from a bushfire, appropriate to the —
(a) potential for ignition caused by burning embers, radiant heat or flame generated by a
bushfire; and
(b) intensity of the bushfire attack on the building.
Under NCC 2019 Amendment 1 July 2020, Section 3.10.5.0 Application states:
(a) Subject to (b), Performance Requirement P2.7.5 is satisfied for:
A Class 1 building; or
A Class 10a building or deck associated with a Class 1 building
located in a designated bushfire prone area if it is constructed in accordance with –
AS3959; or
NASH Standard – Steel Framed Construction in Bushfire Areas.
(b) The requirements of (a) do not apply when, in accordance with AS 3959, the classified
vegetation is Group F rainforest (excluding wet sclerophyll forest types), mangrove
communities and grasslands under 300 mm high.
The building works are not Class 1 or 10a therefore As3959 does not apply. It is noted however
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Section 31
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542 Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads that the applicant proposes the building be voluntarily constructed to satisfy the BAL that would be assigned to the building to further reduce the level of risk acting on the building and the occupants therein. Based on the SPP compliant modelling undertaken herein the building would therefore likely have to be built to satisfy BAL 12.5 - BAL 19 noting the modelling used adopts a Flame Temperature of 1200K and AS3959 only requires the use of 1090K, which would reduce the width of the BAL contours acting on the site. A specific BAL assessment should be conducted once the footprint of the building has been approved. © 2022 30
Section 32
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542 Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads 7 LEGISLATION AND OVERLAYS 7.1 Noosa Plan 2020 – Natural Hazards Overlay Code The proposed development is considered assessable development and therefore is assessable against Table 8.2.3.3 Bushfire Hazard Area of Council’s Bushfire Overlay Code which has been reproduced as Table 2. © 2022 31
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
Table 2 – Table 8.2.3.3 Bushfire Hazard Areas – Part 8 Overlay Code Noosa Plan 2020
PERFORMANCE OUTCOMES ACCEPTABLE OUTCOMES PROPOSED SOLUTION
Safety of people and property
PO1 AO1.1 This Bushfire Hazard Assessment and Management Plan has been prepared to
Development maintains the safety of people and Development which will materially increase the number of people maintain the safety of people and property from the adverse impacts of bushfire.
property from the adverse impacts of bushfire. living or congregating on premises, including reconfiguring a lot, is not
AO1.1 – No increase in the number of people living or congregating on premises
located within a medium or high bushfire hazard area.
is proposed.
AO1.2 AO1.2 – The majority of the proposed development footprint occupies the
Development maximises setbacks from hazardous vegetation to existing building footprint. Only minor extension of the southern portion of the
achieve an acceptable risk. existing development footprint would arise. The development maximises the
setbacks via incorporation of all land between the building and the limit of the
Editor’s Note —PSP8 Natural Hazards provides guidance for NSC fire break as the APZ. The extent of separation proposed in conjunction
assessing bushfire hazard risk and preparing a bushfire hazard with the mitigating circumstances mentioned within this report has been
management plan. identified herein as generating an acceptable risk.
Impact on Ecologically Important Areas
PO2 No acceptable outcome provided No new clearing is deemed necessary to enact bushfire mitigation measures on
Bushfire mitigation measures do not adversely impact the site hence the development will not adversely impact on biodiversity values,
on: connectivity, ecosystem functioning, and the long-term physical integrity of
waterways, wetlands and areas of native vegetation.
a) biodiversity values, connectivity and ecosystem
functioning; and
b) the long term physical integrity of waterways, wetland
and areas of native vegetation.
Water Supply for Fire Fighting Purposes
AO3.1 – Reticulated water will be provided to the site.
PO3 AO3.1
Development provides an adequate water supply for Premises are connected to the reticulated water supply.
firefighting purpose which is reliable, safely located and
freely accessible. Editor's note—For reconfiguring a lot, water supply needs to provide
for a minimum flow and pressure of 10 litres a second at 200kPa at all
times for firefighting purposes.
OR
AO3.2
Where there is no available reticulated water supply, the premises
has:
a) an accessible dam, swimming pool or water tank available for
firefighting purposes with an onsite water volume of not less than
5,000 litres; and
b) a water supply outlet pipe 50 millimetres in diameter fitted with a
standard fire brigade fitting connected to the water supply (other than
where the water supply is in a swimming pool or dam).
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PERFORMANCE OUTCOMES ACCEPTABLE OUTCOMES PROPOSED SOLUTION
Editor’s Note—Water supply capacity for firefighting purposes is in
addition to water supply capacity for other uses and activities on the
premises.
Essential Community Infrastructure
PO4 AO4.1 N/A – The proposed development does not involve essential community
Essential community infrastructure is able to function Development involving essential community infrastructure is not infrastructure.
effectively during and immediately after bushfire events. located within a medium or high bushfire hazard area.
OR
AO4.2
Where located in a medium or high bushfire hazard area,
development involving essential community infrastructure is designed
to function effectively during and after a bushfire event in accordance
with a Bushfire Hazard Management Plan.
Editor’s Note— PSP8 Natural Hazards provides guidance for
assessing bushfire hazard risk and preparing a bushfire hazard
management plan.
Hazardous Material
PO5 AO5 AO5 – The proposed development does not involve the manufacture or storage
Public safety and the environment are not adversely Hazardous materials are not manufactured or stored in bulk in a of hazardous materials in bulk.
affected by the impacts of bushfire on hazardous bushfire hazard area.
materials manufacturing or storing in bulk.
Access and Evacuation Routes
PO6 AO6.1 PO6 – N/A – Development proposes to utilise existing road network, no new
Roads provide for easy and safe evacuation of residents The road layout provides for through-roads and avoids cul-de-sacs roads are proposed.
of premises and access by emergency services. and dead-end roads.
OR
AO6.2
The development has a perimeter road reserve with a minimum width
of 20 metres and maximum gradient of 12.5%.
OR
AO6.3
Cul-de-sacs or no-through roads are provided with fire trails or access
easements, which are capable of being navigated by conventional
vehicles and which link to through roads.
AO6.4
Safe access and egress is available at all times to all of the
development for emergency vehicles and personnel.
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Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
PERFORMANCE OUTCOMES ACCEPTABLE OUTCOMES PROPOSED SOLUTION
AO6.5
Where an emergency access point is required, it complies with the
relevant works codes and PSP6 Engineering Design Standards.
Lot design
PO7 AO7 AO7 – N/A – No residential lots proposed.
Lot design and building siting minimises bushfire hazard Each residential lot:
risk to people and property. a) includes a building envelope, identified on a plan of subdivision;
b) is of sufficient size and shape to allow for efficient emergency
access to buildings for firefighting appliances (e.g. by avoiding battle-
axe/hatchet lots and long narrow lots with long access driveways to
buildings);
c) where more than 2500m², achieves setbacks from hazardous
vegetation in line with Bushfire Attack Level 29 requirements as per
AS3959; and
d) is designed so that buildings and structures are sited in locations of
lowest hazard within the lot and elements of the development least
susceptible to fire are closest to the fire hazard.
Firebreaks and fire access tracks
PO8 AO8.1 AO8.1 – The development does not involves the creation of a new road and
Firebreaks and fire access tracks provide: Where development involves the creation of a new road and lots, a lots.
firebreak is provided by providing a cleared road reserve not less than
20 metres wide and maximum gradient of 12.5% around the perimeter
a) adequate access for firefighting and other
of the subdivision, between the created lots and surrounding
emergency vehicles; and
vegetated lands.
b) adequate access for the evacuation of residents and OR
emergency personnel in an emergency situation. AO8.2 AO8.2 - The development does not involves the creation of a new road and
Fire access tracks are provided between the created lots and lots.
surrounding vegetated land that:
a) have a cleared minimum width of 6 metres;
b) have a maximum gradient of 12.5%;
c) provide unbroken access for fire fighting vehicles;
d) provide passing bays and turning areas;
e) are located within an access easement that is granted in favour of
Noosa Council and the Queensland Fire and Rescue Service.
AO8.3
AO8.3 – All bushfire management measures would be carried out on the
Bushfire management measures are carried out on the subject
subject property noting an existing Infrastructure Agreement has been
property and not any adjoining property.
approved allowing Ozcare to maintain the fire break in the adjacent NSC land.
© 2022 34
Section 36
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542 Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads 7.2 State Planning Policy – Natural Hazards, Risk and Resilience The Department of State Development, Manufacturing, Infrastructure and Planning’s State Planning Policy – State interest guidance material – Natural hazards, risk and resilience – Bushfire (December 2019) contains the development assessment benchmarks for natural hazards, risk and resilience - bushfire. The SPP assessment benchmarks prevail over those prescribed in the Noosa Plan Bushfire Hazard Overlay Code where they involve the same design elements. An assessment of the proposed development’s compliance with each of the assessment benchmarks has been provided below. Assessment Benchmark 3 For development in a bushfire prone area involving vulnerable uses 1. Vulnerable uses are not established or intensified within the bushfire prone area unless: a. there is an overriding need in the public interest for the new or expanded service the development provides b. there are no other suitable alternative location within the required service catchment, and c. site planning can appropriately mitigate the risk (for example, siting ovals for an educational establishment between the hazardous vegetation and structure. The vulnerable use is already established within the bushfire prone area and no intensification of people living or congregating on the site is proposed. The development design makes use of existing and proposed bushfire mitigation measures that appropriately mitigate the risk. Assessment Benchmark 4 Assessable Development Development contributes to an effective and efficient emergency response and recovery capabilities. In the first instance, this can be achieved by new or expanded community infrastructure that is providing essential services (emergency services, hospital and educational establishment) not being in a bushfire prone area, as addressed in assessment benchmark 3. To ensure emergency services can respond effectively, development is located within a reticulated water supply area or includes a dedicated static water supply that is available solely for fire-fighting purposes and can be accessed by fire-fighting vehicles. Reticulated water is available to the site. Assessment Benchmark 5 Assessable material change of use Site layout places the landscape and open spaces within the site between premises and adjacent mapped medium, high or very high potential bushfire intensity areas. This landscaping and open space comprises protective landscape treatments that: 1. Comprise only low threat vegetation, including grassland managed in a minimal fuel condition16, maintained lawns, golf courses and cultivated gardens; or 2. Are designed to ensure a potential available fuel load is maintained at less than 8 tonnes/hectare in aggregate and with a fuel structure that remains discontinuous. Note – The landscape or open space may be located within the mapped medium, high and very high intensity areas to create a separation between the development and the balance of the bushfire prone area. The proposed development footprint boundary is separated from the hazardous vegetation areas. It is recommended that any new landscaping associated with the proposed works maximises the use of low-flammability species and or avoids clustering of flammable species. Where involving a requirement for revegetation or rehabilitation outside of bushfire prone areas © 2022 35
Section 37
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542 Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads 1. Revegetation or rehabilitation areas contain patches of less than one ha of continuous fuel (i.e., surrounded by either no fuel or non-continuous fuel) and are further than 100 metres from the interface with mapped medium, high or very high potential bushfire intensity patches greater than two hectares in size. Vegetation corridors in these areas with continuous fuel, should be less than 50 metres in width and isolated patches of continuous fuel, should be less than 0.5 hectare. No revegetation or rehabilitation areas are currently proposed. It is recommended that any landscaping undertaken within the site facilitates conditions which satisfy Assessment Benchmark 7 below. Assessment Benchmark 7 Where a requirement for an asset protection zone (or similar) exists Landscaping treatments comprise only low threat vegetation, including grassland managed in a minimal fuel condition, maintained lawns, golf courses, maintained public reserves and parklands, vineyards, orchards, cultivated gardens, commercial nurseries, nature strips and windbreaks. OR Landscaping management maintains a potential available fuel load which is less than eight tonnes/hectare in aggregate, and fuel structure which is discontinuous. OR Development includes a bushfire management plan for the maintenance of any identified asset protection zone, including landscape design and ongoing vegetation management. This document includes a Bushfire Management Plan which addresses Landscaping treatments. . © 2022 36
Section 38
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542
Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads
8 CONCLUSIONS
This Bushfire Hazard Assessment and Management Plan has been prepared to assess and
manage the degree of potential bushfire risk acting on the proposed Material Change of Use
development application for the Ozcare Aged care Facility at 100 Cooyar Street, NOOSA
HEADS.
A Local Hazard Map has been prepared for the site consistent with the State Planning Policy
– Natural Hazards, Risk and Resilience – Technical Manual – A ‘fit for purpose’ approach in
undertaking natural hazard studies and risk assessments. The Local Hazard Map has
identified that High and Medium Potential Bushfire Intensity areas are located in the northern,
southern, and eastern extents of the assessment area which includes a 100m buffer area
about the site. Post development the new building will be situated in a Potential Impact Buffer.
A bushfire risk assessment has been undertaken in general accordance with AS/NZS ISO
31000:2018 – Risk Management Methodology. The risk assessment identified that the extent
of separation proposed in conjunction with the recommendations and circumstances
mentioned within this report facilitate an acceptable-tolerable risk of radiant heat impact for
the vulnerable use.
Overall, the development proposed for the site, in combination with recommendations
referenced herein, is deemed suitable with respect to providing a reasonable level of
protection for people and property within the site.
Bushfire is an extremely serious and often unpredictable phenomenon that requires serious
preparatory planning and decision making to avoid potential damage to infrastructure and or
loss of life. All recommendations made herein have been formulated based on site conditions
at the time of writing and therefore may not be appropriate in the event site conditions change
over time.
Implementation of the bushfire mitigation measures referenced herein is not implied nor
intended to advocate that residents and/or occupants remain on the site during a bushfire
event nor that people and property will be protected from bushfire impact. The measures are
intended to reduce the potential severity of bushfire impact to persons and property and not
prevent actual bushfire impact.
The landowners and site managers are to be responsible for ensuring the measures
prescribed herein are applied and stay up to date with site conditions and industry standards.
Landholders/managers should therefore liaise with Queensland Fire and Rescue Services at
regular intervals (e.g., recommended at least every 5 years).
The first call in the event of a bushfire emergency should always be ‘000’.
8.1 Certification Matters
The following bushfire mitigation measures are to be certified as satisfactorily completed by
the project Bushfire Consultant prior to commencement of the proposed/approved uses on the
site:
All actionable recommendations set in Section 5 of this report have been implemented
(i.e., establishment of APZs, landscaping etc.) where practical at the time of
certification.
© 2022 37
Section 39
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542 Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads 9 REFERENCES Cruz M.G., Gould J.S., Alexander M.E., Sullivan A.L., McCaw W.L., Matthews S. (2015) A Guide to Rate of Fire Spread Models for Australian Vegetation. CSIRO Land and Water Flagship, Canberra, ACT, and AFAC, Melbourne, Vic, 123pp. Gould, McCaw, Cheney, Ellis & Matthews. (2007). Field Guide – Fuel assessment and fire behaviour in dry eucalypt open forest. Ensis-CSIRO, Canberra, ACT and Department of Environment and Conservation, Perth, WA. Leonard, J., Opie, K. (2017). Estimating the potential bushfire hazard of vegetation patches and corridors. An enhancement of Queensland’s methodology for State-wide mapping of bushfire prone areas. CSIRO Land & Water, Australia. Noosa Planning Scheme (2020). Bushfire Hazard Overlay Code. Noosa Shire Council. Queensland Fire and Emergency Services. (2019). Bushfire Resilient Communities - Technical Reference Guide for the State Planning Policy - State Interest Guideline - Natural Hazards, Risk and Resilience 2- Bushfire. Southeast Queensland Fire and Biodiversity Consortium – Operational Manual. The State of Queensland, Department of State Development, Manufacturing, Infrastructure and Planning (2019). Natural hazards, risk and resilience - Bushfire State Planning Policy – state interest guidance material. Webster. (2002). The Complete Bushfire Safety Book. Random House (Aust) Pty Ltd. © 2022 38
Section 40
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J000542 Lot 9 on RP225312 – 100 Cooyar Street, Noosa Heads APPENDIX 1 – SITE LAYOUT © 2022 39
Section 41
N 7079463515
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[email protected] | 07 3392 0235
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