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Approved Plans - RAL22/0026
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APPROVED PLAN
BSP326083 RAL22/0026
2SP326083
NOOSA COUNCIL
12 JANUARY 2022
1SP326083
CSP326083
ASP326083
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418.6
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1.882ha
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(127)
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9.2 147.5
101.4
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10
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17.9 74
Bla
3.4 5
28
17.4
111.6
.2
34
4 8 .6
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53
BLE Lot 2
56
2
.8
10 831m²
17
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9
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4.754ha
12
4.501ha .9
26
21
10
119.7
(578)
503
36RP897845
LEGEND
Proposed Lot Boundary
Tallowood Pl Proposed Covenant Boundary
Offset Dist
Position of Watercourse
Noosa Plan Overlay
Proposed Building Location Envelope
20RP897845 21RP897845
23RP897845
22RP897845
Notes. Proposed Vegetation Covenant
1. Boundaries are compiled from RP131369 and have not been surveyed in the preparation
of this plan. Areas and dimensions may therefore vary on survey.
Client:
BRETT HAGE Horizontal Datum: MGA 56 vide RTK CORS Drawing Number:
218806-03-01 Surveyed/Checked: N/A 103 Wrigley St (Cnr Sugar Rd)
PO Box 5774
Vertical Datum: N/A Sheet no.1 of 1 sheets. Drawn/Checked: ENW/JPG MAROOCHYDORE BC QLD 4558
Drawing Title:
PROPOSAL PLAN Co-Consultants: Rev Date Description Date: 25/11/2022 (P) 07 5479 5311
(E) [email protected]
Reconfiguration of Lot 3 on RP131369 into 2 Lots
Site Description: North Coast Environmental Services Scale: 1:1500 at A3 (W) www.cadcon.com.au
at 96 Black Mountain Range Rd, Alta Projects (Consulting Engineers) 0 50 ACN 098 201 828 Part of CadCon International Pty Ltd
BLACK MOUNTAIN
Document Set ID: 22196599
Version: 1, Version Date: 01/12/2022
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APPROVED PLAN
RAL22/0026
NOOSA COUNCIL
12 JANUARY 2022
Document Set ID: 22131081
Version: 1, Version Date: 07/10/2022
Page 3
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APPROVED PLAN
RAL22/0026
NOOSA COUNCIL
12 JANUARY 2022
Document Set ID: 22131081
Version: 1, Version Date: 07/10/2022
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APPROVED PLAN
RAL22/0026
NOOSA COUNCIL
12 JANUARY 2022
Document Set ID: 22131081
Version: 1, Version Date: 07/10/2022
Page 5
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APPROVED PLAN
RAL22/0026
NOOSA COUNCIL
12 JANUARY 2022
Document Set ID: 22131081
Version: 1, Version Date: 07/10/2022
Page 6
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APPROVED PLAN
RAL22/0026
NOOSA COUNCIL
12 JANUARY 2022
Document Set ID: 22131081
Version: 1, Version Date: 07/10/2022
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APPROVED PLAN
RAL22/0026
NOOSA COUNCIL
12 JANUARY 2022
BUSHFIRE HAZARD ASSESSMENT AND MANAGEMENT
PLAN v1
J001050
LOT 3 ON RP131369
96 BLACK MOUNTAIN RANGE ROAD
BLACK MOUNTAIN
FOR
BRETT HAGE
JUNE 2022
PO Box 9566 Pacific Paradise QLD 4564 / Email: [email protected]
ABN 60 625 108 625
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
DOCUMENT CONTROL
Document: Bushfire Hazard Assessment & Management Plan
Client: Brett Hage
Project Number: J001050
Project: Reconfiguration of a Lot
Site: Lot 3 on RP131369
96 Black Mountain Range Road, Black Mountain
File Ref: C:\CLIENTS\HAGE BRETT – 96 BLACK MTN RANGE RD BLACK
MTN\04_REPORTING\Bushfire Hazard Assessment & Management Plan v1 – 96
Black Mountain Range Road BLACK MOUNTAIN.docx
Version Date Distribution Author/s Approved
1 27/06/2022 Brett Hage; J. Isaacs (B. Env Sc.) Joshua Lee
E. Wilton – Cadcon 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
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
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
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 3.1 – NOTOPHYLL VINE FOREST 9
3.2.2 VEGETATION HAZARD CLASS 24.1 – ACACIA OPEN FOREST ON RESIDUALS 9
3.2.3 VEGETATION HAZARD CLASS 39.2 – LOW TO MODERATE TREE COVER IN BUILT UP AREAS 10
3.2.4 VEGETATION HAZARD CLASS 40.4 – CONTINUOUS LOW GRASS OR 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 19
4.1 GENERAL 19
4.2 RISK FROM IDENTIFIED HAZARDOUS VEGETATION 20
5 BUSHFIRE IMPACT REDUCTION MEASURES 21
5.1 GENERAL 21
5.2 ASSET PROTECTION ZONES 21
5.2.1 GENERAL 21
5.3 WATER SUPPLY 22
5.4 FIRE BREAKS 23
5.5 VEHICULAR ACCESS 23
5.6 LANDSCAPING AND REGROWTH 24
5.7 GENERAL PROPERTY MAINTENANCE 24
6 AUSTRALIAN STANDARD 3959:2018 CONSTRUCTION OF BUILDINGS IN
BUSHFIRE PRONE AREAS (AS 3959:2018) SETBACKS 26
7 LEGISLATION AND OVERLAYS 27
7.1 NOOSA PLAN 2020 – NATURAL HAZARDS OVERLAY CODE 27
7.2 STATE PLANNING POLICY – NATURAL HAZARDS, RISK AND RESILIENCE 31
8 CONCLUSIONS 33
© 2022 ii
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050 Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain 8.1 CERTIFICATION MATTERS 33 9 REFERENCES 34 APPENDIX 1 – SITE LAYOUT 35 © 2022 iii
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
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 3 on RP131369, located at
96 Black Mountain Range Road, Black Mountain (referenced hereafter as ‘the site’). The site is the
subject of a Reconfiguration of a Lot development application to be submitted to Noosa 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:
• Medium Potential Bushfire Intensity area; and
• Potential Impact Buffer.
Plate 1 – SPP Bushfire Intensity Mapping Overlay
1.3 Development Proposal
The site is proposed to be subdivided into 2 rural residential allotments. Access to the proposed new
lot will be gained via a short access driveway connecting directly to Black Mountain Range Road.
The Plan of Development is included as Appendix 1.
© 2022 4
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
2 Site Description
2.1 General
The site covers approximately 6.6ha and has been improved with a dwelling and sheds in the north-
western corner of the site. The northern site extent is host to managed grassland whilst the southern
site extent is host to regrowth rainforest inclusive of a waterway. The site is located in the south-
western extent of the Black Mountain area.
The site is zoned as Rural Residential within the Noosa Plan 2020.
Plate 2 depicts the site’s position in the landscape and the extent of existing development.
Plate 2 – Site Context (Source: Nearmap 2021)
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 rate of 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 the eastern side of the Black Mountain Range ridgeline resulting in slopes
between 5-20 degrees on a mixed east aspect.
The site reaches a topographic high of approximately 200m AHD about the western boundary and
declines to a topographic low of 145m AHD about the eastern boundary.
A watercourse was observed flowing west to east through the regrowth rainforest in the south and
another was observed entering the north-eastern corner of the site. The watercourses meet about
the north-eastern corner of the site and exit the site into the easterly adjacent lot.
Plate 3 depicts topography conditions within and adjacent to the site.
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
Plate 3 – Site Topography (Source: NC Interactive Maps)
2.3 Vegetation within the site
The vegetation on site consists of regrowth rainforest. The balance area of the site exhibits managed
grassland with low density mature trees.
2.4 Vegetation external of the site
Rural residential allotments containing a mixture of pasture and corridors of regrowth rainforest and
acacia open forests surround the site on all sides.
Hazardous bushland is located to the northwest, south, and west of the site. Continuous fuel load
pathways toward the site are fragmented by the presence of clearings, roads, and rainforest
vegetation along the balance perimeters of the site.
Plate 4 depicts the general extent of bushland fuel sources surrounding the site. Vegetation hazard
characteristics are described in Section 3.2.
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
Open forest
Rainforest
Open forest
Open forest
Plate 4 – Dominant forest fire runs (Source: QLD Globe)
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
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
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
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 3.1 – Notophyll vine forest;
• Vegetation Hazard Class 24.1 – Acacia open forest on residuals;
• Vegetation Hazard Class 39.2 - Low to moderate tree cover in built-up areas; and
• Vegetation Hazard Class 40.4 – Continuous low grass or tree cover.
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 3.1 – Notophyll vine forest
Vegetation Hazard Class 3.1 (VHC 3.1) is the dominant vegetation type within the site and offsite to
the northeast. The community exhibits an average canopy height of 16-22m with crown cover of
approximately 40-80%.
The canopy is dominated by Acacia concurrens (black wattle) and Acacia disparrima (hickory wattle)
but also contained Jagera pseudorhus (foambark), Macaranga tanarius, Guioa semiglauca (wild
quince), Flindersia schottiana (bumpy ash cudgerie), and Glochidion sumatranum (cheese tree).
The mid-storey contained a mix assemblage of Alphitonia excelsa (soap tree), Polyscias elegans
(celery wood), Alphitonia petriei (white ash), Mallotus claoxyloides (green kamala), and
Cinnamomum camphora (camphor laurel).
The understorey in the eastern site extent was almost dominated by a monoculture of Lantana
camara with Smilax australis (barbwire vine) and Solanum mauritianum (tobacco bush) also present.
Whereas the balance VC1 exhibited an understorey dominated by Pteridium esculentum (bracken
fern) in the gully with Smilax australis (barbwire vine), Cordyline rubra (cordyline lily), and scattered
Cinnamomum camphora and Lantana camara also present.
VHC 3.1 is attributed a potential combined surface fuel load of 4.5 t/ha and a potential total fuel load
of 12.0 t/ha (QFES, 2019). It should be noted that Rainforest vegetation is a low hazardous
vegetation type and is not assessable under the SPP 2019. Plate 5 depicts typical conditions within
VHC 3.1.
Plate 5 – Characteristic vegetation within VHC 3.1
3.2.2 Vegetation Hazard Class 24.1 – Acacia open forest on residuals
Vegetation Hazard Class 24.1 (VHC 24.1) is the dominant vegetation type in the south and western
limits of the assessment area. The community exhibits an average canopy height of 10-15m with
crown cover of approximately 30-40%.
The canopy is dominated by a monoculture of Acacia melanoxylon (blackwood) but also contained
scattered regrowth rainforest species found in VHC 3.1 and low density of Eucalyptus tereticornis
© 2022 9
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
(forest red gum) and Eucalyptus microcorys (tallowood). The mid-storey contained regenerating
Acacia melanoxylon (blackwood) while the understorey was dominated by native and exotic grasses.
VHC 24.1 is attributed a potential combined surface fuel load of 9.5 t/ha and a potential total fuel
load of 10.1 t/ha (QFES, 2019). Plate 6 depicts typical conditions within VHC 24.1.
Plate 6 – Characteristic vegetation within VHC 24.1
3.2.3 Vegetation Hazard Class 39.2 – Low to moderate tree cover in built up areas
Vegetation Hazard Class 39.2 (VHC 39.2) is characterised by periodically slashed grassland with
low-moderate density woody vegetation. It was noted that Tallowood Place exhibited a linear strip of
mature Eucalyptus microcorys (tallowood) and Eucalyptus tereticornis (forest red gum) lining the
road on either side. However, given the 1-2 tree wide density of the mature trees it was considered
to conform to VHC 39.2
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 (QFES, 2019). Plate 7 depicts typical conditions within VHC 39.2.
Plate 7 – Characteristic vegetation within VHC 39.2
3.2.4 Vegetation Hazard Class 40.4 – Continuous low grass or tree cover in built up areas
Vegetation Hazard Class 40.4 (VHC 40.4) is located across proposed Lot 1 area and offsite to the
northwest and east and is characterised by managed grassland (slashed/mown).
VHC 40.4 is attributed a potential combined surface fuel load of 4.5 t/ha and a potential total fuel
load of 5 t/ha (QFES, 2019). Plate 8 depicts typical conditions within VHC 40.4.
© 2022 10
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
Plate 8 – Characteristic vegetation within VHC 40.4 (foreground)
© 2022 11
Page 19
THE SITE VHC 24.1 - Vegetation Hazard Class 24.1 UNITS OF VEGETATION REMOVED Lot 3 on RP131369 Acacia open forest on residuals A AS PER THE PATCH AND CORRIDOR FILTERING PROCESS Z\ (Leonard et. al (2017) ,_ 150m ASSESSMENT BUFFER VHC 39.2 i Vegetation Hazard Class 39.2 Low to moderate tree cover in built-up areas VHC 3.1 VHC 40.4 Vegetation Hazard Class 3.1 Vegetation Hazard Class 40.4 Notophyll vine forest Continuous low grass or tree cover PROJECT TITLE LIEN I 1 roan sso PaiePaacea ou e0¢ | BUSHFIRE HAZARD ASSESSMENT BRETT HAGE TION HAZARD CLASSES 01050 BFO1 Services a ne san 00625 0828 N RANGE ROAD, BLACK MOUNTAIN eco — aise ne 12550@A3
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050 Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain 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 Medium Potential Bushfire Intensity Areas associated with the VHC 24.1 are located offsite to the northwest, south, and west. NOTE: SUB UNIT 2 represents VHC 3.1 – Notophyll vine forest which in its remnant form (mature fuel loads assumed) is classified as Prone Type 3 – Low hazard under Section 7.5.2 & Figure 14 of Bushfire Resilient Communities 2019. Therefore, SUB UNIT 2 was not included within this assessment. 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. A Medium Potential Bushfire Intensity area has been identified offsite to the northwest, south, and west with western portion of the site captured in the Potential Impact Buffer. 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
Page 21
Sub Unit 1a - stops assessed as 18 degrees due to Sub Unit being located down slope relevant to the development area. (Firelineintensity calculated using Flamesol modelling adopting forest as the rel evant vegetation type} Vegetation Hazard Class 5 i # wy forest on residuals |] | i pane) iv Sub Unit 1b - siope assessed as 24 degree due to Sub Unit being located cown slope relevant to the devel opment area. (Fireline intensity calculated using Flamesol modelling adopting forest as the rel evant vegetation type) Vegetation Hazard Class | >” # IVHC 24.1 - Acaciaopen forest on residuals Sub Unit 2 - Vegetation Hazard Class # VHC 3.1- Notophyll vine forest i - Slope assessed as degrees due to Sub Unit being located downslope relevant to the development area Sub Unit 3 -s 16 due to Sub Unit bei di i the devel (Firetine intensity calculated using Flamesol modelling adopting woodland as therelevant vegetation ty pe) Reambnea] - Vegetation Hazard Class | a VHC 39.2 - Low to moderate tree cover In a 8 47 16 3,515 built-up areas Sub Unit 4 -siope assessed as 16 degrees due to Sub Unit being located downs! ope relevant to the development area (Fireline intensity calculated using Flamesol modelling adopting woodland as the relevant vegetation type) Vegetation Hazard Class , ity" VHC 40.4 - Continous low Tt ae fy [| ee lai | [grass or tree cover ee : ee ie inate He # From: Leonard, J., & Opie, K., (2017) Estimating the petential bushfire hazard of vegetation patches and corridors — an enhancement of Queensland's methodology tor State-wide mapping of bushfire prone areas. CSIRO, Australia. * From: Leonard, J., Newnham, G., Opie, K, and Blanchi, R. (2014) A new methodology for state-wide mapping of bushfire prone areas in Queensland. CSIRO, Australia. ** Prone Type 3 — Low Hazard, in its remnant form (mature fuel loads assumed) as per Bushfire Resilient Communities 2019 Sections 7.5.2& Figure 14. a LEGEND THE SITE MEDIUM POTENTIAL BUSHFIRE INTENSITY Lot 3 on RP131369 150m ASSESSMENT BUFFER L HIGH POTENTIAL BUSHFIRE INTENSITY | LOW POTENTIAL BUSHFIRE INTENSITY |] VERY HIGH POTENTIAL BUSHFIRE INTENSITY orth Coast Environmental PO Box 9686 Pacific Paradiee, ow.460¢ | BUSHFIRE HAZARD ASSESSMENT BRETT HAGE SUB UNITS J001050 BFO2 A SSIVICES ns Aaneos26sc85 | 86 BLACK MOUNTAIN RANGE ROAD, BLACK MOUNTAIN A a aie 4:3200 @ A3 ‘corrieo-r sauzzttves, rae SOCUNENT WAY HOTEE COPED CR TRESMTTESIN NF FORM ORS ANT Ness oany ORIN Broke HT MoUT IME ae T'ey SowEN ONES (SUE DETALS ONE int
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LEGEND THE SITE MEDIUM POTENTIAL BUSHFIRE INTENSITY XQ POTENTIAL IMPACT BUFFER [| Lot 3 on RP131369 a [| 150m ASSESSMENT BUFFER |] HIGH POTENTIAL BUSHFIRE INTENSITY errr, (A3) 1:3200 [| LOW POTENTIAL BUSHFIRE INTENSITY |] VERY HIGH POTENTIAL BUSHFIRE INTENSITY ~ North Coast Lailey el a [esi ee ia NORTH: fe ronmental POBox $666 PaciicPandse ad 466+ | BUSHFIRE HAZARD ASSESSMENT BRETT HAGE LOCAL HAZARD MAP Jo01050 BFO3 A FX TS cist tiniialia sanrsess 8 25 196 BLACK MOUNTAIN RANGE ROAD, BLACK MOUNTAIN 3 3 swosowe sone 1:2550 @A3 Sy,
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
3.6 Quantitative Modelling
Quantitative modelling of the potential bushfire conditions that may be experienced within the
identified hazardous vegetation unit; VHC 24.1 Acacia open forest on residuals, 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 VHC 24.1 (9.5 t/ha surface and near
surface fuels and 10.1 t/ha total fuels).
An 18º effective slope was adopted for the slope underlying the VHC 24.1 Acacia open forest
to the northwest, southwest, and west and a 24º effective slope was adopted for the slope
underlying the VHC 24.1 Acacia open forest to the southeast.
The default Flame Width of 100m was chosen given the large variance in the edge width of
the onsite and offsite VHC 24.1.
A Forest Fire Danger Index (FFDI) of 47 has been adopted for the site consistent with the
assignment by QFES (Catalyst 2020) (refer Plate 9).
Plate 9 – FFDI (Source: QFES redi Map)
The Flamesol output results are shown in Plates 10 & 11.
© 2021 16
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
Plate 10 – VHC 24.1 (Acacia open forest) – 18 degree – 100m Flame Width
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
Plate 11 – VHC 24.1 (Acacia open forest) – 24 degree – 100m Flame Width
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050
Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain
4 BUSHFIRE RISK ASSESSMENT
4.1 General
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 12 illustrates the main bushfire attack mechanisms acting on
buildings.
Plate 12 – 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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society will not accept this risk and measures are to be put in place to reduce
risks to at least a tolerable level.
Assessment Benchmark 4 of the SPP Bushfire 2019 references radiant heat flux exposure of
<29kW/m² on any part of the building as generating an Acceptable to Tolerable level of risk.
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 225º south-west to 0ºnorth, is deemed to expose the site to a ‘likely’
probability of impact should a fire run occur from these directions. Hazardous vegetation
located downwind of the site under typical SEQ seasonal fire winds; 1º north to 224º south
south-west, is deemed to expose the site to an ‘unlikely’ probability of impact.
4.2 Risk from Identified Hazardous Vegetation
The Plan of Development depicts building envelopes within the proposed Lots which will be
primarily flanked by hazardous vegetation to the north, south, and west. The likelihood of a
fire approaching from the northwest, west, and southwest is considered likely, given dominant
regional fire weather winds are derived from the north-west to south-west.
The degree of separation offered to the adjoining vegetation is the primary driver of the
assigned level of risk and was determined with consideration to the Flamesol modelling output
presented in Section 3.3. In the absence of an appropriate separation buffer to the adjacent
vegetation, and implementation of relevant AS3959-2018 construction standards, the future
dwellings on the site could be exposed to direct flame, severe radiant heat and ember attack
during the modelled bushfire conditions resulting in total structure loss.
The Plan of Development provides a minimum 39m setback between the proposed building
envelopes and the closest hazardous vegetation (VHC 24.1 Acacia Open Forest) to the south-
west. 29.3m is the minimum separation required to ensure the proposed building envelopes
on the Lots 1 & 2 are exposed to <29kW/m² radiant heat flux as per the Flamesol modelling
presented herein.
The extent of proposed separation comprises land within the lots and the adjacent Black
Mountain Range Road reserve which is considered a reliable permanent low threat zone for
the life of the development. The Plan of Development therefore facilitates an acceptable risk
of radiant heat impact to the building envelopes thereby satisfying Assessment Benchmark 4
of the SPP Bushfire 2019.
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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 13 depicts the concept of an APZ surrounding a dwelling in a bushfire prone
areas.
Plate 13 – Asset Protection Zones
The development has been confirmed to be located within a bushfire hazard area hence
provision of adequate separation between the building envelopes nominated immediately
flanking the hazardous vegetation is required to provide a reasonable level of safety to site
occupants and emergency services staff.
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.
Assessment Benchmark 4 of the State Planning Policy – state interest guidance material
states:
Development supports, and does not hinder, disaster management response or recovery
capacity or capabilities. Where reconfiguring a lot creating lots of greater than 2000 square
metres:
To ensure emergency access and operational space for firefighters the subdivision layout
results in lots that are sited so that they are separated from the closest edge to the adjacent
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050 Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain medium, high or very high potential bushfire intensity area by a distance that achieves a radiant heat flux level of 29 kilowatt per square metre or less at: 1. The building envelope, if identified at RaL stage, or 2. Where a building envelope is not identified, at all the lot boundaries. Compliance with Assessment Benchmark 4 can be attained where all allotments are sufficiently separated from the nearby forest hazard so that a radiant heat flux level at any point on the building envelope, or the lot boundaries where no building envelope is identified, does not exceed 29 kW/m². The output results from Plate 10 & 11 in Section 3.6 identify that a minimum setback of 21 & 29.3m is required to the edge of the adjoining VHC 24.1 vegetation to achieve the <29 kW/m² radiant heat flux acting on the proposed building envelopes. The Plan of Development provides a minimum 39m setback between the proposed building envelopes and the closest hazardous vegetation (VHC 24.1 Acacia Open Forest) to the south- west. 29.3m is the minimum separation required to ensure the proposed building envelopes on the Lots 1 & 2 are exposed to <29kW/m² radiant heat flux as per the Flamesol modelling presented herein. The extent of proposed separation comprises land within the lots and the adjacent Black Mountain Range Road reserve which is considered a reliable permanent low threat zone for the life of the development. To ensure the available separation is maintained for the life of the development all land between the building envelopes and Black Mountain Range Road inclusive of 10m distance around the future dwellings is to be maintained as a low threat low fuel load Asset Protection Zone. Vegetative conditions in the APZ are to be provided as detailed in Section 5.6 Landscaping. 5.3 Water Supply The availability of a reliable water supply for firefighting purposes is a vital tool in the defence of bushfire impact. Reticulated water supply is currently not available within the site nor proposed to be connected to the site. The proposed development will therefore require provision of a readily accessible on-site emergency static water supply in accordance with Assessment Benchmark 4 of the SPP Bushfire 2019. Assessment Benchmark 4 references the QFES 2019 Bushfire Resilient Communities document for information regarding appropriate static water supply. Section 9.1 of Bushfire Resilient Communities’ states: An appropriate static water supply (in bushfire prone areas where reticulated supply is not provided) to support effective emergency services response includes a water tank that is available solely for firefighting purposes and can be accessed by firefighting appliances. The water tank is to be provided within 10 metres of each building (other than a class 10 building), which: a) is either below ground level or of non-flammable construction; b) has a take-off connection at a level that allows the following dedicated, static water supply to be left available for access by firefighters: i.10,000 litres for residential buildings; It is therefore recommended that a dedicated 10,000 litres should be made available to the future dwellings on each of the proposed new lots and this volume should be reserved for firefighting purposes only. Plate 14 outlines an example of how this can be achieved. © 2022 22
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050 Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain Plate 14 – Example Static Water Supply tank design for firefighting purposes (Source: Kingspan Group 2021) 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. Given the proposed Lots satisfy the Assessment Benchmark 4 criteria, the high density of Low Potential Bushfire Intensity Areas surrounding the site, and as the westerly adjacent hazardous bushland interface can be readily accessed by emergency services from Black Mountain Range Road, the provision of additional fire break trails within the site is deemed unnecessary. 5.5 Vehicular Access Development in bushfire prone areas should be serviced by safe access/exit points for both occupants and emergency services personnel. Assessment Benchmark 4 of the SPP Bushfire 2019 seeks: To facilitate safe evacuation during a bushfire event, include a development footprint plan that is located within 60 metres of the street frontage and sited to enable a route between the development footprint plan and the street frontage with a gradient that does not exceed of 12.5 per cent. The proposed Lot 2 building envelope and proposed Lot 1’s western building envelope will gain access via short driveways (i.e., 10-20m length) connecting directly to Black Mountain Range Road to the west of the site. Proposed Lot 1’s eastern building envelope will gain access via a long driveway (approx. 350m) connecting to Black Mountain Range Road to the west of the site. However, as the driveway for its majority will be located within the identified Low Potential Bushfire Intensity Area, the length is considered acceptable. All of the proposed access driveways are bordered by low threat conditions (i.e., VHC 40.4 or VHC 3.1) on either side and hence the chance of access/egress becoming constrained within a bushfire event is deemed low. All new driveways are expected to achieve <12.5% grade. It is recommended all new driveways and access easements are built to a minimum of 3.5m width with 4.8m vertical clearance in accordance the QLD Fire Hydrant and Vehicle Access Guidelines 2019. Lot 1’s driveway is to provide a dedicated turning area at its terminus at the eastern building © 2022 23
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envelope/dwelling, or near to, for a QFES medium rigid vehicle in accordance the QLD Fire
Hydrant and Vehicle Access Guidelines 2019.
No further driveway recommendations are deemed necessary.
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 rainforest, grassland managed in a
minimal fuel condition, maintained lawns, golf courses and cultivated gardens etc); or
2. Are designed to ensure a potential available flammable 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
< 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 edge of the rehabilitation areas flanking building
envelopes. Landholders should consult their local native plant nursery for suitable
species selection; and
• The revegetation works within the covenant areas maximises the use of low
flammability species.
All APZ’s are required to be maintained by the individual landholder/s and or occupants and
are to consist of low threat understorey vegetation conditions (e.g., mown grass) 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.
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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.
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6 AUSTRALIAN STANDARD 3959:2018 CONSTRUCTION OF BUILDINGS IN
BUSHFIRE PRONE AREAS (AS 3959:2018) SETBACKS
The entire site is mapped within the Bushfire Hazard Overlay in the Noosa Plan 2020 (refer
Plate 15) and SPP Bushfire Hazard Overlay Map (refer Plate 1).
Plate 15 – NC Bushfire Hazard Overlay
Building works within land which has been designated under a power of legislation as being
subject, or likely to be subject, to bushfires triggers building design assessment under AS
3959:2018 (NCC 2019).
The Standard provides minimum construction requirements for new habitable dwellings and
habitable building alterations in designated Bushfire Prone Areas. The construction
requirements are intended to improve the performance of buildings subjected to burning
debris, radiant heat or flame contact. Building works in Designated Bushfire Prone Areas must
be built to the Bushfire Attack Level (BAL) construction standard relevant to the building site
as identified by the AS 3959:2018 methodology.
Based on the setbacks provided, all future Class 1 buildings are anticipated to achieve a BAL
29 construction standard or lower. A specific BAL assessment will be required once building
plans have been progressed given the BAL relies on an accurate understanding of the final
footprint of the building within the individual building envelopes and is required to be assessed
against the active iteration of the Standard at the time of assessment.
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050 Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain 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 27
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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 –The proposed building envelopes and APZ’s are located outside of the
located within a medium or high bushfire hazard area.
mapped Medium Potential Bushfire Intensity Area’s as depicted on the Local
Hazard Area Map BF03.
AO1.2
Development maximises setbacks from hazardous vegetation to AO1.2 – The development has provided minimum setbacks between the
achieve an acceptable risk. proposed building envelopes and hazardous vegetation to achieve the SPP
Assessment Benchmark 4 criteria of <29kW/m2 radiant heat flux exposure. This
Editor’s Note —PSP8 Natural Hazards provides guidance for setback achieves an acceptable risk where all the mitigation measures detailed
assessing bushfire hazard risk and preparing a bushfire hazard within this report are employed.
management plan.
Impact on Ecologically Important Areas
PO2 No acceptable outcome provided No clearing of vegetation for bushfire mitigation measures is required. The
Bushfire mitigation measures do not adversely impact bushfire mitigation measures prescribed herein will not adversely impact on
on: biodiversity values, 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
PO3 AO3.1 AO3.1 – No reticulated water is currently available to the site. The water supply
Development provides an adequate water supply for Premises are connected to the reticulated water supply. requirements of SPP Assessment Benchmark 4 prevails; 10,000KL, and can be
firefighting purpose which is reliable, safely located and conditioned with an approval.
freely accessible. Editor's note—For reconfiguring a lot, water supply needs to provide
Note, the reliance upon dams or pools for water storage is not an acceptable
for a minimum flow and pressure of 10 litres a second at 200kPa at all
solution under the SPP.
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 Hazardshttps://noo-prod-
icon.saas.t1cloud.com/Pages/Plan/Book.aspx?hid=9256
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 - The road design, in conjunction with the recommendations set herein
Roads provide for easy and safe evacuation of residents The road layout provides for through-roads and avoids cul-de-sacs (refer sections 5.5) is considered to provide for easy and safe evacuation of
of premises and access by emergency services. and dead-end roads. residents and access by emergency services.
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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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-
Lot design and building siting minimises bushfire hazard Each residential lot:
a) BLE’s are identified on the plan.
risk to people and property. a) includes a building envelope, identified on a plan of subdivision;
b) Both the proposed Lot 1 western BLE and Lot 2 BLE are located directly
b) is of sufficient size and shape to allow for efficient emergency
adjacent to Black Mountain Range Road allowing for short and direct access for
access to buildings for firefighting appliances (e.g. by avoiding battle-
emergency personnel. Proposed Lot 1’s eastern BLE is located approximately
axe/hatchet lots and long narrow lots with long access driveways to
350m from Black Mountain Range Road via a long driveway. However, as the
buildings);
proposed BLE and majority of the proposed driveway is located within a Low
c) where more than 2500m², achieves setbacks from hazardous Potential bushfire intensity area and the driveway will achieve a gradient of
vegetation in line with Bushfire Attack Level 29 requirements as per <12.5% the proposed access to the Lot 1 eastern BLE is considered acceptable.
AS3959; and
c) All proposed Lots achieve setbacks from hazardous vegetation which are
d) is designed so that buildings and structures are sited in locations of expected to secure a Bushfire Attack Level 29 or lower construction requirement
lowest hazard within the lot and elements of the development least under AS3959.
susceptible to fire are closest to the fire hazard.
d) All of the proposed BLEs are separated from the adjacent bushland hazard
by low threat areas (i.e., Black Mountain Range Road corridor to the west).
Firebreaks and fire access tracks
PO8 AO8.1 AO8.2 – Given the proposed Lots satisfy the Assessment Benchmark 4 criteria,
Firebreaks and fire access tracks provide: Where development involves the creation of a new road and lots, a the high density of Low Potential Bushfire Intensity Areas surrounding the site,
firebreak is provided by providing a cleared road reserve not less than and as the immediately adjacent hazardous bushland interface can be readily
20 metres wide and maximum gradient of 12.5% around the perimeter accessible by emergency services from Black Mountain Range Road corridor,
a) adequate access for firefighting and other
of the subdivision, between the created lots and surrounding the provision of additional fire break trails within the site is deemed unnecessary
emergency vehicles; and
vegetated lands.
Therefore, no formal firebreak trails are deemed practicable or necessary in
b) adequate access for the evacuation of residents and OR
this instance.
emergency personnel in an emergency situation. AO8.2
Fire access tracks are provided between the created lots and AO8.3 – All bushfire management measures prescribed herein would be
surrounding vegetated land that: carried out on the subject property and not rely upon any adjoining property.
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
Bushfire management measures are carried out on the subject
property and not any adjoining property.
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050 Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain 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 Natural Hazards 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 4 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 supply is not available to the site hence a dedicated static water supply of 10,000L for each future dwelling is recommended as per the SPP Bushfire 2019 water supply guidance material recommendations. Where reconfiguring a lot creating lots of greater than 2000 square metres To ensure emergency access and operational space for firefighters, include a development footprint plan that is separated from the closest edge of the adjacent mapped medium, high or very high potential bushfire intensity area by a distance that achieves a radiant heat flux level of 29 kilowatt per square metre or less. To facilitate safe evacuation during a bushfire event, include a development footprint plan that is located within 60 metres of the street frontage and sited to enable a route between the development footprint plan and the street frontage with a gradient that does not exceed of 12.5 per cent. All of the proposed BLE’s are provided with enough separation to achieve <29 kW/m² radiant heat flux hence satisfying the Assessment Benchmark 4 <29 kW/m² criteria. The proposed Lot 2 building envelope and proposed Lot 1 western building envelope will gain access via short driveways (i.e., 10-20m) connecting directly to Black Mountain Range Road to the west of the site. Proposed Lot 1’s eastern building envelope will gain access via a long driveway (approx. 350m) connecting to Black Mountain Range Road to the west of the site. However, as the driveway for its majority will be located within the identified Low Potential Bushfire Intensity Area, the length is considered acceptable. All of the proposed access driveways are bordered by low threat conditions (i.e., VHC 40.4 or VHC 3.1) on either side and hence the chance of access/egress becoming constrained within a bushfire event is deemed low. All new driveways are expected to achieve a <12.5% grade. It is recommended all new driveways and access easements are built to a minimum of 3.5m width with 4.8m vertical clearance in accordance the QLD Fire Hydrant and Vehicle Access Guidelines 2019. Lot 1’s driveway is to provide a dedicated turning area at its terminus at the eastern building envelope/dwelling, or near to, for a QFES medium rigid vehicle in accordance the QLD Fire Hydrant and Vehicle Access Guidelines 2019. Where reconfiguring a lot creating additional lots for the purpose of residential development and a reticulated water supply is not provided (fire trails). To ensure safe access and egress and operational space for rural fire-fighting vehicles, a fire trail and working area is provided that separates the new residential lot or development footprint plans from adjacent mapped medium, high or very high potential bushfire intensity and is designed and constructed in accordance with the design parameters in Table 4. Given the proposed Lots satisfy the Assessment Benchmark 4 criteria and the high density of Low Potential Bushfire Intensity Areas surrounding the site, and as the immediately adjacent hazardous bushland interface can be readily accessible by emergency services from Black Mountain Range Road corridor, the provision of additional fire break trails within the site is deemed unnecessary © 2022 31
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050 Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain Therefore, no formal firebreak trails are deemed practicable or necessary. Assessment Benchmark 5 Where reconfiguring a lot. Subdivision design avoids locating lots (or for lots greater than 2000 square metres, avoids locating the development footprint plan) that are within bushfire prone areas and on ridgelines, saddles and crests where slopes exceed 15 per cent. All of the proposed Lots are >2000m² and the proposed building envelopes are positioned on slopes of <15%. 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. © 2022 32
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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 1 into 2 Reconfiguration
of a Lot development application for 96 Black Mountain Range Road, Black Mountain.
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 Medium Potential Bushfire Intensity areas are located offsite to the northwest,
south, and west. Proposed Lot 2’s and Lot 1’s western building envelopes and will be
positioned in a Potential Impact Buffer whilst proposed Lot 1’s eastern building envelope is
located within a Low Potential Bushfire Intensity Area.
A bushfire risk assessment has been undertaken in general accordance with AS/NZS ISO
31000:2018 – Risk Management Methodology. The risk assessment identified that each
proposed Lot achieves an Acceptable risk of radiant heat impact to the future dwellings.
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 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 33
Page 41
Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050 Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain 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 (2006). Bushfire Hazard Overlay Code. Noosa 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 34
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Bushfire Hazard Assessment & Management Plan v1 NCES REF: J001050 Lot 3 on RP131369 – 96 Black Mountain Range Road, Black Mountain APPENDIX 1 – SITE LAYOUT © 2022 35
Page 43
BSP326083
2SP326083
1SP326083
CSP326083
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36RP897845
LEGEND
Proposed Lot Boundary
Tallowood Pl Proposed Covenant Boundary
Offset Dist
Position of Watercourse
Noosa Plan Overlay
Proposed Building Location Envelope
20RP897845 21RP897845
23RP897845
22RP897845
Notes. Proposed Vegetation Covenant
1. Boundaries are compiled from RP131369 and have not been surveyed in the preparation
of this plan. Areas and dimensions may therefore vary on survey.
Client: Horizontal Datum: Drawing Number: Surveyed/Checked: N/A
BRETT HAGE MGA 56 vide RTK CORS
218806-02-02 103 Wrigley St (Cnr Sugar Rd)
PO Box 5774
Vertical Datum: N/A Sheet no.1 of 1 sheets. Drawn/Checked: JPG MAROOCHYDORE BC QLD 4558
Drawing Title:
PROPOSAL PLAN Co-Consultants: Rev Date Description Date: 25/05/2022 (P) 07 5479 5311
(E) [email protected]
Site Description: Reconfiguration of Lot 3 on RP131369 into 2 Lots North Coast Environmental Services Scale: 1:1500 at A3 (W) www.cadcon.com.au
at 96 Black Mountain Range Rd, Alta Projects (Consulting Engineers) 0 50 ACN 098 201 828 Part of CadCon International Pty Ltd
BLACK MOUNTAIN