Original source · versioned page text
Appendix F - Bushfire Hazard Assessment
BUSHFIRE HAZARD ASSESSMENT v1
LOT 9 ON RP131369
216 BLACK MOUNTAIN ROAD
BLACK MOUNTAIN
FOR
MURRAY RICHARDSON
OCTOBER 2018
PO Box 9566 Pacific Paradise QLD 4564 / Email: [email protected]
See the original
The page text is free to read. Viewing or downloading an original file needs an account.
Log in to see the originalLog in to download the original file
Large file: the download may take up to a minute.
Searchable page text hides email addresses. Original files are unchanged and may show email addresses.
Full text of the other 25 pages
Page 2
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
DOCUMENT CONTROL
Document: Bushfire Hazard Assessment
Client: Murray Richardson
Project Number: J000207
Project: Reconfiguration of a Lot
Site: Lot 9 on RP131369
216 Black Mountain Road, Black Mountain
Version Date Distribution Author/s Approver
1 09/10/2018 Callan Lowrie – Murray C. Vaughan (B. Sc.) – Joshua Lee
and Associates Senior Environmental Principal Environmental
Scientist/Ecologist Scientist
B. Sc. AES, mEIANZ,
mESA
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.
© 2018 i
Page 3
Bushfire Hazard Assessment v1 NCES REF: J000207 Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain Table of Contents 1 INTRODUCTION 1 1.1 BACKGROUND 1 1.2 DEVELOPMENT PROPOSAL 1 1.3 BUSHFIRE HAZARD AREA MAPPING 1 2 SITE DESCRIPTION 3 2.1 GENERAL 3 2.2 TOPOGRAPHY 3 2.3 VEGETATION 4 2.3.1 VEGETATION HAZARD CLASS 8 – ACACIA COMMUNITIES 6 2.3.2 VEGETATION HAZARD CLASS 12 – MIXTURE OF RURAL CLASSES – MAINLY GRASSLAND 6 2.3.3 VEGETATION HAZARD CLASS 16 – MIXTURE OF URBAN CLASSES 6 2.3.4 VEGETATION HAZARD CLASS 17 – RAINFOREST 7 2.4 OFF-SITE VEGETATION 7 3 BUSHFIRE HAZARD ASSESSMENT 9 3.1 HAZARD ASSESSMENT METHODOLOGY 9 3.1.1 LOCAL HAZARD AREA MAP 9 3.1.2 SETBACK DISTANCES – AUSTRALIAN STANDARD 3959-2009 CONSTRUCTION OF BUILDINGS IN BUSHFIRE PRONE AREAS 10 4 LEGISLATION AND OVERLAYS 13 4.1 NOOSA PLAN – NATURAL HAZARDS OVERLAY CODE 13 5 CONCLUSION AND RECOMMENDATIONS 19 5.1 CONCLUSION 19 5.2 RECOMMENDATIONS 19 6 REFERENCES 20 APPENDIX 1 – SITE LAYOUT 21 © 2018 ii
Page 4
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
1 INTRODUCTION
1.1 Background
This Bushfire Hazard Assessment has been prepared for land formally described as Lot 9 on
RP131369, located at 216 Black Mountain Road, Black Mountain (referred to as ‘the site’). The site
is the subject of a Reconfiguration of a Lot development application to be submitted to the Noosa
Council and is mapped as being host to a bushfire intensity area, which triggers the requirement for
assessment against the Natural Hazards Overlays Code of the Noosa Plan 2006.
1.2 Development Proposal
The Reconfiguration of a Lot proposal intends to subdivide the existing allotment into two allotments
with a new building envelope proposed in the southern extent of proposed Lot 2. Proposed Lot 2
will have access provided from the existing driveway from Black Mountain Road.
A Plan of Development has been prepared by Murray and Associates (Drawing No. 61500/A) and
has been presented in Appendix 1.
1.3 Bushfire Hazard Area Mapping
Council’s Bushfire Hazard Area mapping identifies that the site is located within a Medium Potential
Bushfire Intensity area and a Potential Impact Buffer area (refer to Plate 1). The proposed house
site on Lot 2 is captured within a Potential Impact Buffer area.
Approximate location of
building envelope
Plate 1 – Council’s Potential Bushfire Hazard Areas
Since the introduction of Council’s Bushfire Hazard Area mapping, the Queensland Government has
introduced State Planning Policy (SPP) mapping, which supersedes Council’s Bushfire Prone Areas
mapping. Under the SPP mapping, the site is host to a Medium Potential Bushfire Intensity and
Potential Impact Buffer (refer to Plate 2). The proposed building envelope on Lot 2 is located in both
the Medium Potential Bushfire Intensity area and the Potential Impact Buffer area.
© 2018 1
Page 5
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
Approximate location of
building envelope
Plate 2 – State Planning Policy Bushfire Prone Area mapping
Under Chapter 2, Part 1, Section 8, Item 4(a) of the Planning Act 2016, where there is an
inconsistency between a State Planning Policy and local government planning instrument, the State
Planning Policy applies over the local planning instrument. Therefore, the SPP Bushfire Hazard
Areas mapping prevails with respect to the trigger for assessment under the Natural Hazards
Overlays Code of the Noosa Plan 2006.
© 2018 2
Page 6
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
2 SITE DESCRIPTION
2.1 General
The site comprises a 4.6ha rectangular shaped allotment positioned within hilly terrain in a rural
residential area. The site is characterised by cleared areas subject to regular maintenance with a
sparsely vegetated gully in the north of the site and lightly vegetated areas within the balance of the
site. An existing residential dwelling is present in the near centre of the site and is to be retained
within proposed Lot 1. A comprehensively vegetated allotment is present to the north of the site,
whilst semi-cleared and modified vegetation communities dominated by Acacia species are present
to the east and west of the site. The site is bordered to the south by Black Mountain Road (refer to
Plate 3).
Plate 3 – Site conditions and context (Source: Google Earth)
2.2 Topography
The site exhibits variable topography and relatively steep slopes of approximately 20 degrees on
mixed north-west and south-east facing slopes. A ridge line is present in the central portion of the
site aligned on a south-west to north-east axis. A gully is present in the north and in the south of the
site (refer to Plate 4). The northern gully has been dammed within the site.
© 2018 3
Page 7
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
Plate 4 – Site Topography (Source: Noosa Interactive Mapping)
2.3 Vegetation
A site inspection was undertaken to identify the vegetation within the site and within a 100m buffer
area to the site. The inspection identified the following vegetation hazard classes (as per Leonard
et al., (2014)):
• Vegetation Hazard Class 8 – Acacia communities;
• Vegetation Hazard Class 12 – Mixture of rural classes – mainly grassland;
• Vegetation Hazard Class 16 – Mixture of urban classes; and
• Vegetation Hazard Class 17 – Rainforest.
The distribution of the vegetation hazard classes is presented in Figure 1 with descriptions provided
in the following sections.
© 2018 4
Page 8
SUBJECT SITE 100M BUFFER TO SITE MM VHC 8 - ACACIA COMMUNITIES GMB VHC 12 - MIXTURE OF RURAL CLASSES - MAINLY GRASSLAND MBB VHC 16 - MIXTURE OF URBAN CLASSES VHC 17 - RAINFOREST PO Box 9566 Pacific Paradise, QLD 4564 | BUSHFIRE MANAGEMENT PLAN FIGURED DIMENSIONS TO | SCALE: SEE INSERT DRAWN: CV. FIGURE | Esa ABOSENS Lot 9 on RP131369 BE READ IN PREFERENCE F eainapnceeee coaster cenit and 216 Black Mountain Road ABN: 44 851 168 122 Black Mountain TO SCALING DATE; 04.05.2018 SHEET NO: 1 OF 3 TITLE: VEGETATION UNITS
Page 9
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
2.3.1 Vegetation Hazard Class 8 – Acacia communities
Vegetation Hazard Class 8 (VHC 8) is present in the northern portion of the site and within the 100m
buffer to the site. This community exhibits an average canopy height of 8m – 10m with an average
projective foliage canopy cover of 30% – 40%. The community was dominated by Acacia disparrima
(hickory wattle) with areas of dense understory of Lantana camara and exotic grass species. Other
areas of VHC 8 north of the site were host to a rainforest understorey. Plate 6 depicts typical
conditions within VHC 8 (centerground of images), which is described by Leonard et al. (2014) as
having a potential fuel load of 10 t/ha.
Plate 5 – Characteristic vegetation within VHC 8
2.3.2 Vegetation Hazard Class 12 – Mixture of rural classes – mainly grassland
Vegetation Hazard Class 12 (VHC 12) is present throughout the site and the buffer area. The
vegetation in this hazard class comprises high density exotic grass species including Setaria
sphacelata (South African pigeon grass) with lower density Acacia species present and intermittent
trees also present. VHC 12 is described by Leonard et al. (2014) as having a potential fuel load of 5
t/ha. Plate 6 depicts typical conditions within VHC 12.
Plate 6 – Characteristic vegetation within VHC 12
2.3.3 Vegetation Hazard Class 16 – Mixture of urban classes
Vegetation Hazard Class 16 (VHC 16) is present associated with areas surrounding existing
dwellings and generally comprises regularly maintained lawn and residential gardens with low
density woody vegetation. VHC 16 is described by Leonard et al. (2014) as having a potential fuel
load of 3 t/ha. Plate 7 depicts typical conditions within VHC 16.
© 2018 6
Page 10
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
Plate 7 – Characteristic vegetation within VHC 16
2.3.4 Vegetation Hazard Class 17 – Rainforest
Vegetation Hazard Class 17 (VHC 17) is present within the 100m buffer area to the site within the
Black Mountain Road reserve. The vegetation in this hazard class comprises a small unit of
rainforest species including Guioa semiglauca, Flindersia schottiana, Mallotus philippensis and
Cryptocarya species to an average height of approximately 20m and a projective foliage cover of
greater than 70%. VHC 17 is described by Leonard et al. (2014) as having a potential fuel load of
1 t/ha. Plate 8 depicts typical conditions within VHC 17.
Plate 8 – Characteristic vegetation within VHC 17
2.4 Off-site Vegetation
Vegetation synonymous with VHC 8 – Acacia communities is present to the north and west of the
site. This vegetation has the potential to facilitate bushfire ingress into the site as well as advance
ember attack. VHC 17 – Rainforest vegetation is present to the south-west of the site whilst
fragmented vegetation with discontinuous fuel loads is present to the east, south and west of the
site. Plate 9 depicts the general extent of hazardous vegetation and available fire zones adjacent
to the site.
© 2018 7
Page 11
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
Plate 9 – Available forest fire runs (Image Source: Google Earth)
© 2018 8
Page 12
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
3 BUSHFIRE HAZARD ASSESSMENT
3.1 Hazard Assessment Methodology
The Noosa Plan’s Bushfire Hazard Overlay Code 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 trigger for assessment under the Noosa Plan’s
Bushfire Hazard Overlay Code. Therefore, the site-specific hazard mapping is to be prepared
consistent with the methodology adopted to prepare the SPP mapping.
The method used to prepare the SPP mapping is described in A new methodology for State-wide
mapping of bushfire prone areas in Queensland (Leonard et al., 2014) which is also referenced in
the Department of Infrastructure, Local Government and Planning’s State Planning Policy – Natural
Hazards, Risk and Resilience – Technical Manual – A ‘fit for purpose’ approach in undertaking
natural hazard studies and risk assessments. The preparation of site specific hazard maps is
described in these documents and is referenced as a Local Hazard Area Map. Preparation of a Local
Hazard Area Map has been undertaken using a combination of methodologies from the following
sources:
• A new methodology for State-wide mapping of bushfire prone areas in Queensland (Leonard
et al., 2014) for:
o Attribution of Vegetation Hazard Classes;
o Calculation of Potential Bushfire Intensity; and
o Patch and corridor filtering.
• State Planning Policy Guideline – Mitigating the Adverse Impacts of Flood, Bushfire and
Landslide (June, 2003) which was used as a guide for undertaking natural hazard
assessment on a site-specific scale; and
• The Noosa Plan’s Bushfire Hazard Overlay Code.
3.1.1 Local Hazard Area Map
A Local Hazard Area Map was prepared using the following methodology:
• Categorizing the vegetation within the site in accordance with the vegetation hazard classes
derived from Leonard et al. (2014);
• Subdividing the identified vegetation hazard classes into bushfire hazard sub-units based on
slope differences and vegetation hazard classes (refer to the sub-unit mapping presented as
Figure 2);
• Using the patch and corridor filtering process identified in Leonard et al. (2014) to amend the
bushfire hazard sub-units1; and
• Applying 100m potential intensity buffers to the amended bushfire hazard sub-units to derive
an overall Local Hazard 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 100m 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., 2014).
© 2018 9
Page 13
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
The Local Hazard Area Map is presented in Figure 3 and identifies the following Potential Bushfire
Intensity areas within the assessment area:
• Medium Potential Bushfire Intensity Area; and
• Potential Impact Buffer.
The site scale Bushfire Intensity Area mapping presented in Figure 3 is to supersede the SPP
mapping for the purposes of this assessment and is to be used to guide formulation of appropriate
site-based hazard reduction measures.
The bushfire hazard assessment undertaken herein has identified that the location of the proposed
building envelope within proposed Lot 2, and including the required access to the building envelope,
is situated outside of a Designated Bushfire Prone area. The proposed layout therefore meets the
intent of Council’s Natural Hazards Overlay Code in that the creation and occupancy of the additional
lot is not anticipated to endanger the lives of occupants and/or emergency services staff with respect
to bushfire risk. In this regard, the incorporation and further consideration of project specific bushfire
management measures into the development design is considered unnecessary to achieve
compliance with the Noosa Plan Natural Hazards (Bushfire) Overlay Code.
3.1.2 Setback Distances – Australian Standard 3959-2009 Construction of Buildings
in Bushfire Prone Areas
The location of the site within a Bushfire Prone Area on Council’s Natural Hazard Overlay Map
triggers building design assessment under AS3959 (2009) which provides minimum construction
requirements for new dwellings in designated Bushfire Prone Areas. Irrespective of the hazard
assessment undertaken within this report, new dwellings within the allotment are required to be
assessed against AS3959 (2009) as regulated by the Building Code of Australia.
© 2018 10
Page 14
= State Planning Policy — Natural Hazards, Risk and Resilience — Localised Bushfire Hazard Area Map Assessment Methodology: Undertaken in accordance with methodology detailed in the State Planning Policy — State interest Technical Manual Natural Hazards, Risk and Resilience (April, 2016). * 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. Sub Unit 1 — Slope has been set to zero commiserate with the dominant upslope/across slope position of the vegetation communities Vegetation Potential Fire Maximum | Potential Potential Hazard Class Fuel Weather Landscape Fireline Bushfire Load Severity Slope Intensity Intensity* (t/ha) (FFDI) (degrees) (kw/m) * VHC 16 — | Mixture of urban 3 50 0 n/a Low classes Sub Unit 2 Potential Fire Maximum Potential Vegetation Fuel Weather Landscape Fireline eae Hazard Class Load Severity Slope Intensity Intensity* (t/ha) (FFDI) (degrees) (kw/m) * VHC 12 — Mixture of rural - eee erat 5 50 20 n/a Grassfire Prone grassland Sub Unit 3 - Fire Maximum Potential Vegetation eotental Weather Landscape Fireline eee Hazard Class (vha) Severity Slope Intensity Intensity" (FFDI) (degrees) (kw/m) * ia cae 10 50 20 12,322 Medium Sub Unit 4— Slope has been set to zero commiserate with the dominant upslope/across slope position of the vegetation Vegetation Potential Fire Maximum Potential Potential Hazard Class Fuel Weather Landscape Fireline Bushfire Load Severity Slope Intensity Intensity* (tha) (FFDI) (degrees) (kw/m) * NOC i 1 50 0 nla Low Rainforest Sub Unit 5 — Slope has been set to zero commiserate with the dominant upslope/across slope position of the vegetation Vegetation Potential Fire Maximum Potential Potential Hazard Class Fuel Weather Landscape Fireline Bushfire Load Severity Slope Intensity Intensity* (Vha) (FFDI) (degrees) (kw/m) * NHGIG = facia 10 50 0 3,100 Low communities Sub Unit 6 Potential Fire Maximum Potential Vegetation Fuel Weather Landscape Fireline Fotential : Bushfire Hazard Class Load Severity Slope Intensity Intensity* (tha) (FFDI) (degrees) (kw/m) * VHC 12 — Mixture of rural classes — 5 50 0 n/a Grassfire Prone mainly grassland PO Box 9586 Pacific Paradise, OLD 4564 BUSHFIRE MANAGEMENT PLAN _ | KEY SUBJECT SITE M@) MEDIUM POTENTIAL BUSHFIRE INTENSITY AREA FIGURED DIMENSIONS TO. | SCALE: SEE INSERT DRAWN: CV. FIGURE 2 ce me ssl Lot @ en RP131969 100M TO SUBJECT SITE fll GRASSFIRE POTENTIAL BUSHFIRE INTENSITY AREA BE READ IN PREFERENCE ABN: 44851 168 122. aoe LOW POTENTIAL BUSHFIRE INTENSITY AREA TO SCALING DATE: 04.05.2018 SHEET NO: 2 OF 3 | TITLE: SUB UNITS
Page 15
rime ee BUSHFIRE MANAGEMENT PLAN | KEY. SUBJECT SITE | MEDIUM POTENTIAL BUSHFIRE INTENSITY AREA FIGURED DIMENSIONS TO Figure 3 Sans Lot 8 on RP131369 BE READ IN PREFERENCE E: admin@northcoasteny com au a 100M BUFFER TO THE SUBJECT (ZZ POTENTIAL IMPACT BUFFER
Page 16
Bushfire Hazard Assessment v1 NCES REF: J000207 Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain 4 LEGISLATION AND OVERLAYS 4.1 Noosa Plan – Natural Hazards Overlay Code The proposed development is considered assessable development and therefore is assessable against the assessment criteria contained within Division 9 of the Natural Hazard Overlays Code which has been reproduced as Table 1. © 2018 13
Page 17
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
Table 1 – Assessment against the Noosa Plan’s Natural Hazard Overlays Code
SPECIFIC OUTCOMES PROBABLE SOLUTIONS PROPOSED SOLUTION
General
O10 The safety of people and property are S10.1 The proposed lots are not located on land Proposed Lot 2 is sited on land subject to Medium
maintained by: that is subject to Medium or High Bushfire Hazard Potential Bushfire Intensity Area; however, the
on overlay maps OM1.4-OM9.442; Local Hazard Area Map prepared as part of this
a) Locating house site areas and other sensitive
assessment indicates that the proposed building
uses on that part of the land least affected by the OR
envelope is sited within a low risk area outside of
bushfire hazard; and
the Potential Impact Buffer area and greater than
b) fire mitigation methods are used that are S10.2 The proposed lots are sited on land 100m from the Medium Potential Bushfire
adequate for the Potential Bushfire Hazard rating determined as low bushfire risk by a site-specific Intensity Area hazard. The layout is therefore
of the individual site, having regard to – bushfire hazard assessment. considered compliant with O10.
i. vegetation type; AND
ii. slope;
S10.3 Additional lots are not created where their Vehicular access to Lot 2 is proposed through the
iii. aspect; only vehicular access route is through a Medium Potential Impact Buffer area via a new short length
or High Bushfire Hazard area shown on overlay driveway from Black Mountain Range Road. This
iv. on-site and off-site fire hazard implications of
maps OM1.4-OM9.4 site-specific assessment has identified the entry
the development;
route traverses through a non-Bushfire Prone
v. bushfire history; Area. The layout complies with S10.3
vi. conservation values of the site; and
vii. ongoing maintenance.
Firebreaks and fire access tracks
O11 Firebreaks or fire access tracks provide— S11.1 Firebreaks are provided by— The proposed Lot 2 building envelope is sited
within a low risk area outside of the Potential
a) adequate access for fire fighting and other a) a cleared road reserve not less than 20m wide
Impact Buffer area and greater than 100m from
emergency vehicles; and located around the perimeter of the subdivision,
the Medium Potential Bushfire Intensity Area
between the created lots and surrounding
b) adequate width to minimise the risk of fire hazard. The incorporation of fire breaks is
vegetated lands;
crossover. deemed unnecessary
OR b) fire access tracks (may be in the form of an
access easement) between the created lots and
surrounding vegetated lands that—
© 2018 14
Page 18
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
SPECIFIC OUTCOMES PROBABLE SOLUTIONS PROPOSED SOLUTION
i. are a minimum cleared width of 6m;
ii. have a formed pavement;
iii. have access at each end and in other locations
where necessary;
iv. have passing areas and turning areas;
v. have clearly identified access points for
emergency vehicles; and
vi. are located on public land or within access
easements that are granted in favour of the
Sunshine Coast Regional Council and the
Queensland Fire and Rescue Service.
Road network
O12 Roads provide for the safe and effective S12.1 Cul-de-sacs or no-through roads are not No new roads are proposed.
evacuation of users of premises and access by used in the street network unless—
Emergency services.
a) a perimeter road reserve with a minimum
reserve width of 20m and a formed width of not
less than 6m is provided; or
b) cul-de-sacs or no-through roads are provided
with fire trails or access easements, capable of
being navigated by conventional vehicles, that
link to through roads (see Figures 13.3 and 13.4);
AND
S12.2 Roads have a maximum grade of 1 in 8 No new roads are proposed.
(12:5%).
© 2018 15
Page 19
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
SPECIFIC OUTCOMES PROBABLE SOLUTIONS PROPOSED SOLUTION
Figure 13.3—Consistent road network and lot
layout
Figure 13.4—Inconsistent road network and
lot layout
© 2018 16
Page 20
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
SPECIFIC OUTCOMES PROBABLE SOLUTIONS PROPOSED SOLUTION
Lot design
O13 Lot design and building siting minimises S13.1 Each residential lot— a) A building envelope has been nominated for Lot
bushfire hazard to people and property having 2.
a) includes a house site area, identified on the
regard to slope, aspect, existing vegetation and
plan of subdivision; b) The building envelope measures approximately
adequate separation from hazardous vegetation
1,200m² which is considered sufficient to comply
b) is of sufficient size and dimensions to
with S13.1 (b)
accommodate a dwelling and ancillary buildings
and use areas; c) i. The presence of steep slopes and the
geographic position of the lot precludes the
c) for lots more than 2,500m —
potential to achieve a house site on a lower slope
i. conform with the principles for house site position. The house site is surrounded by low
numbers 1, 2 or 3 shown in Figure 13.5; and hazard vegetation which represents a low risk.
Figure 13.5—House sites in bushfire hazard c) ii. The proposed building envelope is positioned
areas more than 1.5 times the predominant mature
canopy height.
d) Adequate separation from hazardous vegetation
has been achieved.
ii. are separated from hazardous vegetation for a
distance the minimum of 1.5 times the
predominant mature canopy height or 10m,
whichever is the greater; and
d) for lots less than 2,500m2, maximise
separation of buildings from hazardous
vegetation.
© 2018 17
Page 21
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
SPECIFIC OUTCOMES PROBABLE SOLUTIONS PROPOSED SOLUTION
S13.2 Residential lots are designed so that their The house site is provided with a short length
size and shape allow for efficient emergency driveway access from Black Mountain Road and is
access to buildings for fire fighting appliances bordered by cleared open pasture land which is
(e.g. by avoiding long narrow lots with long compliant with S13.2
access driveways).
© 2018 18
Page 22
Bushfire Hazard Assessment v1 NCES REF: J000207
Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain
5 CONCLUSION AND RECOMMENDATIONS
5.1 Conclusion
This Bushfire Hazard Assessment has assessed the degree of bushfire hazard acting on Lot
9 on RP131369, located at 216 Black Mountain Road, Black Mountain. The assessment
identified that, following a site specific Local Hazard Area map being produced, the proposed
Lot 2 building envelope and access route from Black Mountain Road is located external of a
Designated Bushfire Prone Area. Consequently, the incorporation and further consideration
of project specific bushfire management measures into the development design is considered
unnecessary to achieve compliance with the Noosa Plan Natural Hazards (Bushfire) Overlay
Code.
It is noted the location of the site within a Bushfire Prone Area on Council’s Natural Hazard
Overlay Map triggers building design assessment under AS3959 (2009) which provides
minimum construction requirements for new dwellings in designated Bushfire Prone Areas.
Irrespective of the hazard assessment undertaken within this report, new dwellings within the
allotment are required to be assessed against AS3959 (2009) as regulated by the Building
Code of Australia.
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 the development zone and not prevent
actual bushfire impact. Site occupants are strongly recommended to seek regular advice from
local fire authorities to ensure the subject recommendations remain appropriate in future
years.
The first call in the event of a bushfire should always be ‘000’.
5.2 Recommendations
The following recommendations are made to further reduce the risk of bushfire impact to
people and property associated with the development:
• Future landscaping works/plantings maximise the use of locally indigenous, low
flammability species and or low density plantings of suitable open forest /woodland
species with low bark shedding characteristics. Landholders should consult their local
native plant nursery for suitable species selection.
• Surface fuels and woody regrowth be controlled within a nominal 20m asset protection
zone about the future dwelling on Lot 2 to maintain a low fuel load environment about
the dwelling. Roof tops, roof gutters and other areas of the dwellings and including
ancillary infrastructure such as garden sheds be regularly inspected, and debris
removed to reduce the risk of spot fires developing in the properties during a bushfire
event.
© 2018 19
Page 23
Bushfire Hazard Assessment v1 NCES REF: J000207 Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain 6 REFERENCES Bradstock, Gill & Williams. 2012. Flammable Australia: fire regimes, biodiversity and ecosystems in a changing world. CSIRO, Collingwood, Victoria. Byram, G. M. 1959. Combustion of forest fuels. Pages 61-89 In: Davis, K. P., editor. Forest fire: control and use. New York, NY: McGraw-Hill. Department of Emergency Services (2003). Appendix 3 & 8 State Planning Policy 1/03 Guideline: ‘Mitigating the Adverse Impacts of Flood, Bushfire and Landslide’. Brisbane. 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., Newnham, G., Opie, K., and Blanchi, R. (2014) A new methodology for state-wide mapping of bushfire prone areas in Queensland. CSIRO, Australia. Southeast Queensland Fire and Biodiversity Consortium – Operational Manual. Webster. 2002. The Complete Bushfire Safety Book. Random House (Aust) Pty Ltd. © 2018 20
Page 24
Bushfire Hazard Assessment v1 NCES REF: J000207 Lot 9 on RP131369 – 216 Black Mountain Road, Black Mountain APPENDIX 1 – SITE LAYOUT © 2018 21
Page 25
MURRAY & ASSOCIATES SURVEYORS & TOWN PLANNERS ACN 075 543 154 Murray Building,15-17 Currie St. Nambour Ph.(07)5441 2188 P.O. Box 246 Branch Offices at Caboolture Chinchilla Roma Gympie & Emerald
Page 26
MURRAY & ASSOCIATES SURVEYORS & TOWN PLANNERS ACN 075 543 154 Murray Building,15-17 Currie St. Nambour Ph.(07)5441 2188 P.O. Box 246 Branch Offices at Caboolture Chinchilla Roma Gympie & Emerald