Henley Brook Structure Plan€¦ · Bushfire Management Plan Henley Brook Structure Plan Prepared for Little Property (WA) Pty Ltd Doc No.: EP18-098(08)--010a| Version: A Project

Prepared for Little Property (WA) Pty Ltd July 2019

Bushfire Management Plan Henley Brook Structure Plan Project No: EP18-098(08)

Bushfire Management Plan Henley Brook Structure Plan

Prepared for Little Property (WA) Pty Ltd Doc No.: EP18-098(08)--010a| Version: A

Project number: EP18-098(08)|July 2019 Page i

Document Control

Doc name: Bushfire Management Plan Henley Brook Structure Plan

Doc no.: EP18-098(08)--010a

Version Date Author Reviewer

1 December 2018 Sean Moylan SCM

Kirsten Knox KK

Anthony Rowe AJR

Document submitted to client for review.

A July 2019 Sean Moylan SCM

Kirsten Knox KK

Anthony Rowe AJR

Document updated to reflect changes to Structure Plan layout. Document submitted to client for review.

© 2019 Emerge Associates All Rights Reserved. Copyright in the whole and every part of this document belongs to Emerge Associates and may not be used, sold, transferred, copied or reproduced in whole or in part in any manner or form or in or on any media to any person without the prior written consent of Emerge Associates.

Disclaimer: This document has been prepared in good faith and is derived from information sources believed to be reliable and accurate at the time of publication. Nevertheless, it is distributed on the terms and understanding that the author is not liable for any error or omission in the information sources available or provided to us, or responsible for the outcomes of any actions taken based on the recommendations contained herein. It is also expected that our recommendations will be implemented in their entirety, and we cannot be held responsible for any consequences arising from partial or incorrect implementation of the recommendations provided. This document has been prepared primarily to consider the layout of development and/or the appropriate building construction standards applicable to development, where relevant. The measures outlined are considered to be prudent minimum standards only based on the standards prescribed by the relevant authorities. The level of bushfire risk mitigation achieved will depend upon the actions of the landowner or occupiers of the land and is not the responsibility of the author. The relevant local government and fire authority (i.e. Department of Fire and Emergency Services or local bushfire brigade) should be approached for guidance on preparing for and responding to a bushfire. Notwithstanding the precautions recommended in this document, it should always be remembered that bushfires burn under a wide range of conditions which can be unpredictable. An element of risk, no matter how small, will always remain. The objective of the Australian Standard AS 3959:2018 is to “prescribe particular construction details for buildings to reduce the risk of ignition from a bushfire” (Standards Australia 2018). Building to the standards outlined in AS 3959 does not guarantee a building will survive a bushfire or that lives will not be threatened by the effects of bushfire attack.



Project number: EP18-098(08)|July 2019 Page ii

Executive Summary

Little Property (WA) Pty Ltd (the proponent) is seeking to progress the Henley Brook Structure Plan

(herein referred to as the ‘structure plan’) over various lots within the locality of Henley Brook

(herein referred to as ‘the site’). The site is approximately 235 hectares (ha) in size and is generally

bound by Park Street to the south, Old Lord Street to the west, Gnangara Road to the north and the

proposed Henley Brook Avenue to the east (excluding the existing Morgan Fields residential

development).

Portions of the site are located within a ‘bushfire prone area’ under the state-wide Map of Bush Fire

Prone Areas prepared by the Office of Bushfire Risk Management (OBRM 2019). The identification of

a site within an area declared as bushfire prone necessitates that a further assessment of the

determined bushfire risk affecting the site (in accordance with Australian Standard 3959:2018

Construction of buildings in bushfire prone areas (AS 3959)) and the satisfactory compliance of the

proposal with the policy measures described in State Planning Policy 3.7 Planning in Bushfire Prone

Areas (SPP 3.7) (WAPC 2015) and the Guidelines for Planning in Bushfire Prone Areas Version 1.3 (the

Guidelines) (WAPC and DFES 2017).

The purpose of SPP 3.7, and its policy intent, is best summarised as preserving life and reducing the

impact of bushfire on property and infrastructure through effective risk-based land use planning.

Pursuant to SPP 3.7, this BMP examines the likely long-term bushfire risk risks and advances

responses that will make the ultimate use of the land suitable for its intended purpose.

The majority of the site is cleared of native vegetation and contains areas that are managed to a low

threat standard in accordance with Section 2.2.3.2 of AS 3959. There are small areas within the site

of vegetation identified in AS 3959 as ‘forest’ (Class A), ‘woodland’ (Class B) and unmanaged

‘grassland’ (Class G), while woodland and ‘shrubland’ vegetation has been identified to the south of

the site, as well as grassland vegetation to the south, west, north and north-east of the site.

In order to consider the likely bushfire risk applicable to future development within the site, a post

development vegetation classification scenario has been assumed in which all classified vegetation,

will be removed or managed to a ‘low threat’ standard. Areas of public open space (including the gas

pipeline corridors and Saint Leonards Creek) will be designed to low threat in accordance with

Section 2.2.3.2 of AS 3959 while achieving broader landscape management objectives. While areas

outside and adjoining the site are proposed to be developed for urban purposes, the timing for this is

uncertain. For this reason, vegetation outside the site has been assumed to remain the same as the

pre-development assessment.

The outcomes of this BMP demonstrate that as development progresses, it will be possible for an

acceptable solution to be adopted for each of the applicable bushfire protection criteria outlined in

the Guidelines. This includes:

• Location: future habitable buildings can be located in an area that will, on completion, be

subject to a low or moderate bushfire hazard.

• Siting and Design: all future habitable buildings can be sited within the proposed development

so that BAL-29 or less can be achieved based on the proposed structure plan through the

location of public roads and public open space, or in lot setbacks.



Project number: EP18-098(08)|July 2019 Page iii

• Vehicular Access: the proposed structure plan provides for an interconnected road network

within the site that will utilise the existing and future connections to Lord Street to the west,

Park Street to the south, Losino Boulevard and Gnangara Road to the north-east and Asturian

Drive to the north and the future Henley Brook Avenue to the east of the site. These road

connections will provide egress options to the north, east, south and west of the site.

• Water: the development will be provided with a permanent and reticulated water supply to

support onsite firefighting requirements.

The measures to be implemented through this structure plan and associated future subdivision

process have been outlined as part of this BMP and can be used to support future planning and

development approval processes. A revised BMP is likely to be required to support any future

subdivision applications, in order to address the specific bushfire risk reduction measures applicable

to each proposed lot.



Project number: EP18-098(08)|July 2019 Page iv

Table of Contents

1 Introduction ........................................................................................................................................... 1

1.1 Background ....................................................................................................................................... 1 1.2 Aim of this report .............................................................................................................................. 2 1.3 Statutory policy and framework ....................................................................................................... 2 1.4 Description of the proposed development ....................................................................................... 2 1.5 Description of land characteristics .................................................................................................... 3

2 Environmental Considerations ............................................................................................................... 4

2.1 Native vegetation – modification and clearing ................................................................................. 6 2.2 Revegetation and landscape plans ................................................................................................... 6

3 Bushfire Assessment Results .................................................................................................................. 8

3.1 Bushfire attack level (BAL) assessment ............................................................................................. 9 3.1.1 Assessment inputs............................................................................................................. 9

3.1.1.1 Post development assumptions ............................................................................. 20 3.1.2 Assessment outputs ........................................................................................................ 21

4 Identification of Bushfire Hazard Issues ............................................................................................... 22

5 Assessment Against the Bushfire Protection Criteria ........................................................................... 23

5.1 Additional management strategies ................................................................................................. 28 5.1.1 Future approval considerations ...................................................................................... 28 5.1.2 Landscape management ................................................................................................. 28

5.1.2.1 Within the site ........................................................................................................ 28 5.1.2.2 Surrounding the site ............................................................................................... 28

5.1.3 City of Swan Firebreak Notice ......................................................................................... 29 5.1.4 Vulnerable or high-risk land uses .................................................................................... 29 5.1.5 Public education and preparedness ................................................................................ 30

6 Responsibilities for Implementation and Management of Bushfire Measures ..................................... 31

7 Applicant Declaration .......................................................................................................................... 33

7.1 Accreditation ................................................................................................................................... 33 7.2 Declaration ...................................................................................................................................... 33

8 References ........................................................................................................................................... 34

8.1 General references ......................................................................................................................... 34 8.2 Online references ............................................................................................................................ 34

List of Tables

Table 1: Summary of potential environmental considerations that may be associated with the site (based on a search of the SLIP databases) ..................................................................................................................... 5

Table 2: Vegetation classification, effective slope and future management ........................................................ 10 Table 3: Setback distances based on vegetation classification and effective slope and Table 2.5 of AS 3959, as

determined by the method 1 BAL assessment ......................................................................................... 21 Table 4: Summary of bushfire protection criteria and compliance statement ..................................................... 24 Table 5: Responsibilities for the implementation of this BMP .............................................................................. 31



Project number: EP18-098(08)|July 2019 Page v

List of Plates

Plate 1: Areas within and surrounding the site identified as ‘bushfire prone areas’ (as indicated in purple) under the state-wide Map of Bush Fire Prone Areas (OBRM 2019). ..................................................................... 1

Plate 2: The five fuel layers in a forest environment that could be associated with fire behaviour (Gould et al. 2007) 9

Figures

Figure 1: Site Location and Topographic Contours Figure 2: Existing Conditions - AS 3959 Vegetation Classification Figure 3: Existing Conditions – Bushfire Hazard Level Figure 4: Post Development Conditions – AS 3959 Vegetation Classification Figure 5: Post Development Conditions – Effective Slope Figure 6: Bushfire Attack Level Contours

Appendices

Appendix A

Henley Brook Structure Plan (Burgess Design Group 2019)



Project number: EP18-098(08)|July 2019 Page vi

List of Abbreviations

Table A1: Abbreviations – General terms

General terms

AHD Australian Height Datum

AS Australian Standard

APZ Asset Protection Zone

BAL Bushfire Attack Level

BMP Bushfire Management Plan

BPAD Bushfire Planning and Design

EEP Emergency Evacuation Plan

ESL Emergency Services Levy

FDI Fire Danger Index

FZ Flame Zone

Table A2: Abbreviations – Organisations

Organisations

DBCA Department of Biodiversity Conservation and Attractions

DoW Department of Water (now known as Department of Water and Environment Regulation)

DFES Department of Fire and Emergency Services

DWER Department of Water and Environmental Regulation

OBRM Office of Bushfire Risk Management

SES State Emergency Services

WAPC Western Australian Planning Commission

Table A3: Abbreviations – Legislation and policies

Legislation

Guidelines Guidelines for Planning in Bushfire Prone Areas version 1.3 (WAPC and DFES 2017)

SPP 3.7 State Planning Policy 3.7 Planning in Bushfire Prone Areas (WAPC 2015)



Project number: EP18-098(08)|July 2019 Page vii

Table A4: Abbreviations – Planning and building terms

Planning and building terms

AS 3959 Australian Standard 3959-2018 Construction of buildings in bushfire prone areas

TPS Town Planning Scheme

POS Public Open Space



Project number: EP18-098(08)|July 2019 Page 1

1 Introduction

1.1 Background

Little Property (WA) Pty Ltd (the proponent) is seeking to progress the Henley Brook Structure Plan

(herein referred to as the ‘structure plan’) over various lots within the locality of Henley Brook

(herein referred to as ‘the site’). The proposed structure plan layout is provided in Appendix A and

the site boundary shown in Figure 1. The site is approximately 235 hectares (ha) in size and is

generally bound by Park Street to the south, Old Lord Street to the west, Gnangara Road to the north

and the proposed Henley Brook Avenue to the east (excluding the existing Morgan Fields residential

development).

Portions of the site are located within a ‘bushfire prone area’ under the state-wide Map of Bush Fire

Prone Areas prepared by the Office of Bushfire Risk Management (OBRM 2019) as shown in Plate 1.

The identification of a site within an area declared as bushfire prone necessitates that a further

assessment of the determined bushfire risk affecting the site (in accordance with Australian Standard

3959:2018 Construction of buildings in bushfire prone areas (AS 3959)) (Standards Australia 2018)

and the satisfactory compliance of the proposal with the policy measures described in State Planning

Policy 3.7 Planning in Bushfire Prone Areas (SPP 3.7) (WAPC 2015) and the Guidelines for Planning in

Bushfire Prone Areas Version 1.3 (the Guidelines) (WAPC and DFES 2017).

Plate 1: Areas within and surrounding the site identified as ‘bushfire prone areas’ (as indicated in purple) under the state-wide Map of Bush Fire Prone Areas (OBRM 2019).




1.2 Aim of this report

The purpose of this BMP is to assess bushfire hazards within the site and nearby areas and ensure

that the threat posed by any identified hazards can be appropriately mitigated and managed. It has

been prepared to support the proposed structure plan for the site and addresses the requirements

of SPP 3.7 (WAPC 2015), the Guidelines (WAPC and DFES 2017) and AS 3959 (Standards Australia

2018). The document provides an assessment of the general bushfire management strategies to be

considered as part of future development of individual dwellings within proposed lots and includes:

• An assessment of the existing classified vegetation in the vicinity of the site (within 150 m as required by SPP 3.7) and consideration of bushfire hazards that will exist in the post development scenario (Section 3).

• Commentary on how the future development can achieve the bushfire protection criteria outlined within the Guidelines including an indication of BAL ratings likely to be applicable to future dwellings (Section 5).

• An outline of the roles and responsibilities associated with implementing this BMP (see

Section 6).

1.3 Statutory policy and framework

The following key legislation, policies and guidelines are relevant to the preparation of a bushfire

management plan:

• Bush Fires Act 1954

• Fire and Emergency Services Act 1998

• Planning and Development Act 2005 and associated regulations

• Building Act 2011 and associated regulations

• State Planning Policy 3.7 Planning in Bushfire Prone Areas (WAPC 2015)

• Guidelines for Planning in Bushfire Prone Areas version 1.3 (WAPC and DFES 2017)

• Australian Standard AS 3959 – 2018 Construction of buildings in bushfire prone areas

(Standards Australia 2018)

1.4 Description of the proposed development

The site covers approximately 235 ha and is proposed to be developed for residential purposes. The

land uses within the site are proposed to include residential lots; public open space (POS); an

interconnected road network; two primary schools; and services such as sewer, power and gas,

associated with residential development. A total of approximately 35 ha of POS is proposed, which

serves a number of functions including:

• The provision of active and passive recreation.

• Incorporation of corridors for existing gas infrastructure.

• Treatment and flood detention of stormwater as part of infiltration and/or discharge from the

site.

• Protection and maintenance of the Saint Leonards Creek foreshore area.

• Retention of existing trees and vegetation.




Proposed land uses are shown in the structure plan provided in Appendix A.

The proposed development within the site is consistent with the ‘urban’ zoning of the site under the

Metropolitan Region Scheme (MRS). The site is currently zoned ‘residential development’ under the

City of Swan Town Planning Scheme (TPS) No. 17. The proposed development of the site is consistent

with the ‘residential development’ zoning.

1.5 Description of land characteristics

The site is generally flat with a south-easterly aspect as shown in the topographic contours provided

in Figure 1. The site ranges from approximately 42 m Australian Height Datum (AHD) in the north-

western corner to 30 m AHD along the south-eastern boundary. Two elevated areas are located

within the site, one along the southern boundary between Partridge Street and Arpent Link and

another in the south-eastern corner.

The site has predominantly been cleared of native vegetation, with a review of aerial imagery

indicating that the majority of remnant vegetation across the site was cleared between 1953 and

1965 to support a range of rural and agricultural land uses (Landgate 2019). The site currently

supports numerous rural-residential lots, the majority of which are approximately 2.5 ha in size.

The land uses immediately surrounding the site include:

• Old Lord Street to the west and the proposed realignment of New Lord Street which is reserved

as ‘Primary Regional Road’ under the MRS. Further to the west is land reserved for ‘Parks and

Recreation’, Whiteman Park.

• Gnangara Road to the north, which is reserved as ‘Primary Regional Road’ under the MRS and

existing residential development. Further to the north-west of the site is the Gnangara Pine

Plantation.

• The proposed extension of Henley Brook Avenue to the east of the site, which is reserved as

‘Other Regional Road’ under the MRS and rural landholdings further to the east.

• Park Street to the south and areas of existing and future urban development.

Two easements, associated with the Dongara to Pinjarra (Parmelia Gas Pipeline (PGP)) gas pipeline

and the Dampier to Bunbury Natural Gas Pipeline (DBNGP) extend in a north-south orientation

through the central portion of the site.




2 Environmental Considerations

In accordance with the Bushfire Management Plan – BAL Contour template prepared by the

Department of Planning, Lands and Heritage (2018), this BMP has considered whether there are any

environmental values that may require specific consideration through either protection, retention or

revegetation. To support this, a review of publicly available databases and site-specific investigations

has been undertaken, with particular reference to the Shared Location Information Platform (SLIP)

databases. A summary of the search results has been provided in Table 1.

The majority of the site has been highly disturbed and largely cleared of native vegetation between

1953 and 1965 to support a range of rural and agricultural land uses. Overall, the site is largely

dominated by areas of ‘Parkland cleared’ vegetation with scattered remnant native trees, as well as

planted endemic and non-endemic species. No vegetation within the site has been identified as

significant (i.e. threatened ecological communities or threatened flora) or of regional or local

significance. Those environmental considerations that should be taken into consideration within the

site include:

• One conservation significant species (forest red tailed black cockatoo (FRTBC)) has been

identified as utilising a roosting site in the northern portion of the site (Emerge Associates

2018b). The roosting site is proposed to be retained through the strategic location of POS. The

vegetation within Whiteman Park and the Gnangara Pine Plantation nearby are likely to be

preferentially used by the relevant black cockatoo species for foraging in comparison to the

intermittent and scattered paddock trees found within the site.

• Saint Leonard’s Creek, a tributary of the Swan River is located within the site along with a

number of man-made trapezoidal drainage channels and dams that are associated with the Saint

Leonard’s Creek catchment. A biophysical assessment (Emerge Associates 2018a) has

determined a foreshore area associated with the portion of Saint Leonards Creek in the site, and

includes the mapped floodway and two small patches of vegetation containing a number of

Eucalyptus rudis over paddock grasses.




Table 1: Summary of potential environmental considerations that may be associated with the site (based on a search of the SLIP databases)

Key environmental feature (information in brackets refers to mapping data source)

Yes / no / potentially occurring within the site

If yes / potentially, describe value that may be impacted

Conservation category wetlands and buffer (Geomorphic wetlands, Swan Coastal Plain (DBCA-019))

No Not applicable. The site is identified as a multiple use wetland, which are described as wetlands with few remaining wetland attributes. No specific management/ protection is required, with the hydrological function of MUWs maintained in accordance with Better Urban Water Management.

RAMSAR wetlands (DBCA-010) No Not applicable.

Threatened and priority flora (DBCA-036)

No Not applicable.

Threatened and priority fauna (DBCA-037)

Potentially Given the previous clearing for agriculture the site now generally consists of parkland cleared areas comprising of pasture grasses, with scattered paddock trees. Fauna habitat values are therefore limited, and restricted to the scattered paddock trees, which will provide potential habitat values for opportunistic and mobile fauna species. One FRTBC roosting site (associated with a stand of non-endemic eucalypts) was identified within the site and is proposed to be retained within POS.

Threatened ecological communities (DBCA-038)

No Not applicable. The structure and composition of vegetation located in the south-eastern portion of the site indicates that it may be considered the ‘banksia woodlands of the Swan Coastal Plain’ threatened ecological community. However, the plant community described within the site does not satisfy the diagnostic criteria detailed within the conservation advice (DoEE 2016) as a result of its small size and representative ‘degraded’ condition (Emerge Associates 2018c)

Bush Forever areas (DOP-071) No Not applicable. It is noted Bush Forever Site 304 occurs 150 m to the west of the site associated with Whiteman Park, Whiteman/West Swan, while a number of other Bush Forever sites (namely Bush Forever Site No. 192, Bush Forever Site No. 195 and Bush Forever Site No. 302) are located within 10km of the site.

Clearing regulations – Environmentally Sensitive Areas (DWER-046)

No Not applicable. It is noted an environmentally sensitive area is located to the west of the site associated with Bush Forever Site 304.

Swan Bioplan Regionally Significant Natural Areas 2010 (DWER-070)

No Not applicable.




2.1 Native vegetation – modification and clearing

The modification and clearing of some native vegetation will be, displaced by the development areas,

roadways and infrastructure. Existing vegetation will be retained where possible through the

strategic location of POS and/or wider road reserves.

All vegetation outside the site is assumed to remain in its existing condition. No areas of native

vegetation outside the site are proposed to be modified or cleared by the proponent as part of the

proposed development.

It is relevant to note that any clearing in accordance with a subdivision approval under the Planning

and Development Act 2005 is exempt from requiring a clearing permit pursuant to Schedule 6 of the

Environmental Protection Act 1986.

2.2 Revegetation and landscape plans

Several areas of POS are proposed across the site, which will be landscaped to achieve low threat in

accordance with Section 2.2.3.2 of AS 3959. The design of these areas will be determined at the

future detailed planning stage(s).

The central portion of the site encompasses two gas pipeline easements associated with the Dampier

to Bunbury Natural Gas Pipeline (DBNGP) and the Parmelia Gas Pipeline (PGP), and will be

landscaped to achieve low threat in accordance with Section 2.2.3.2 of AS 3959. There are

restrictions associated with landscaping and amenities that can be installed within the pipeline

corridor/easements as stated within the DBNGP Land Use Guidelines (DoL 2016) and Planning

Bulletin 87: High Pressure Gas Transmission Pipelines (PB87) (WAPC 2007). The guidelines state land

owners and proponents must seek approval for the planting of vegetation within the DBNGP

corridor, with approval likely to be granted provided there is compliance with the following:

• Vegetation roots must not exceed 300mm in depth

• Vegetation must not be planted directly over the pipeline

• Vegetation must not obstruct the line of sight between the warning marker signs.

The land use restrictions outlined within the guidelines will need to be taken into account for future

development within the site, as well as consultation with the asset owner of the pipeline regarding

the retention or removal of existing trees.

A foreshore area has been designated in association with Saint Leonards Creek, located in the

eastern portion of the site. It has been accommodated within POS as part of the proposed structure

plan. The intent of the landscape response and management of this area is to assist in achieving the

broader objectives of the City of Swan, Department of Biodiversity Conservation and Attractions

(DBCA) and Department of Water and Environmental Regulation (DWER) for waterways which

includes: enhancing the ecological values of the feature (particularly compared to those currently

associated with the existing trapezoidal drain); improving water quality outcomes; and maintaining

the hydrological function.




This will be achieved by:

• Retaining the existing flooded gums, as well as other existing trees where possible.

• Maintaining hydraulic capacity, but also planting the main conveyance channel to achieve ‘living stream’ standards.

• Integrating the remainder of the foreshore area into the surrounding POS area, providing residents with access to passive and active recreation areas. This area will be designed to achieve low threat in accordance with Section 2.2.3.2 of AS 3959 and is intended to minimise an increase in bushfire risk.

The foreshore area is proposed to be maintained in accordance with the requirements of Liveable

Neighbourhoods and Better Urban Water Management.




3 Bushfire Assessment Results

Bushfire risk for the site has been considered following the methods described in the Guidelines

(WAPC and DFES 2017) and in AS 3959.

Appendix Two of the Guidelines provides a description for undertaking a broad level of assessment

using the vegetation classifications from AS 3959. The purpose is to identify at the strategic level the

Bushfire Hazard Level (BHL) and the likely impact and intensity of a bushfire attack. A BHL uses 150 m

to establish the sample area from which to determine the fire run and intensity of a bushfire attack.

The objective of AS 3959 is to reduce the risk of ignition and loss of a building to bushfire. It provides

a consistent method for determining a radiant heat level (radiant heat flux) as a primary

consideration of bushfire attack on a building or object. It measures the Bushfire Attack Level as the

radiant heat level (kWm2) over a distance of 100 m.

Bushfire risk for the site has been appropriately considered in the specific context of the Guidelines

and AS 3959.

The objective of AS 3959 is to reduce the risk of ignition and loss of a building to bushfire. It provides

a consistent method for determining a radiant heat level (radiant heat flux) as a primary

consideration of bushfire attack on a building or object. It also prescribes simple construction

responses that can resist the determined radiant heat level at a given distance from the fire and is

based on six Bushfire Attack Level (BAL) ratings: BAL-LOW, BAL-12.5, BAL-19, BAL-29, BAL-40 and

BAL-FZ, although building survival is not guaranteed.

Not all vegetation is a classified bushfire risk. Vegetation and ground surfaces that are exempt from

classification as a potential hazard is identified as low threat under Section 2.2.3.2 of AS 3959. Low

threat vegetation includes the following:

a) Vegetation of any type that is more than 100 m from the site. b) Single areas of vegetation less than 1 ha in area and not within 100 m of other areas of

vegetation being classified. c) Multiple areas of vegetation less than 0.25 ha in area and not within 20 m of the site, or

each other or of other areas of vegetation being classified. d) Strips of vegetation less than 20 m in width (measured perpendicular to the elevation

exposed to the strip of vegetation) regardless of length and not within 20 m of the site or each other, or other areas of vegetation being classified.

e) Non-vegetated areas, that is, areas permanently cleared of vegetation, including waterways, exposed beaches, roads, footpaths, buildings and rocky outcrops.

f) Vegetation regarded as low threat due to factors such as flammability, moisture content or fuel load. This includes grassland managed in a minimal fuel condition, mangroves and other saline wetlands, maintained lawns, golf courses (such as playing areas and fairways), maintained public reserves and parklands, sporting fields, vineyards, orchards, banana plantations, market gardens (and other non-curing crops), cultivated gardens, commercial nurseries, nature strips and wind breaks.




3.1 Bushfire attack level (BAL) assessment

In accordance with Appendix Five of the Guidelines, there is an option to complete a bushfire hazard

level assessment to support structure plans, Therefore, this BMP includes a bushfire hazard level

assessment as well as a method 1 BAL assessment in order to determine the BAL ratings likely to be

applicable to future habitable buildings based on the vegetation classifications and effective slopes

detailed in Table 2.

3.1.1 Assessment inputs

The assignment of vegetation classifications within 150 m of the site for context and 100 m for

impact is based on an assessment of vegetation structure, which includes consideration of the

various fuel layers of different vegetation types. For example, fuel layers in a typical forest

environment can be broken-down into five segments as illustrated in Plate 2 below. These defined

fuel layers are considered when determining the classification of vegetation and associated bushfire

hazard levels.

Plate 2: The five fuel layers in a forest environment that could be associated with fire behaviour (Gould et al. 2007)

An assessment of existing vegetation within the site and surrounding 150 m was undertaken on 13

December 2018 in accordance with AS 3959 and the Guidelines.

Table 2 below outlines the type of vegetation observed within and surrounding the site, the

classification of each area of vegetation in accordance with Section 2.2.3 and Table 2.3 of AS 3959,

and its assumed post-development classification and any associated management of this vegetation

(where applicable).

As outlined in Table 2:

• The pre-development AS 3959 vegetation classifications (and associated photo locations) are

shown in Figure 2.

• The bushfire hazard ratings are shown in Figure 3.

• The post-development AS 3959 vegetation classifications are shown in Figure 4.

• The effective slope for each area of classified vegetation present in the post-development

scenario is shown in Figure 5.




Table 2: Vegetation classification, effective slope and future management

Pre-development (see Figure 2 and Figure 3) Post development (see Figure 4 and Figure 5)

Plot no.

AS 3959 classification Site photo/s (location points shown in Figure 2)

Plot no.

AS 3959 classification, effective slope and assumptions

1 AS 3959 classification (Figure 2): Forest (Class A) Bushfire hazard level (Figure 3): Extreme Two small areas of forest vegetation are located within the northern portion of the site. This vegetation is characterised by dense vegetation that forms a continuous fuel layer from the surface to the canopy.

Photo location 1: Forest vegetation within the northern portion of the site

Photo location 2: Forest vegetation within the northern portion of the site

14 AS 3959 classification (Figure 4): Non-vegetated area (Exclusion 2.2.3.2(e)) Effective slope (Figure 5): Not applicable Forest vegetation within the site (Plot 1) will be removed to facilitate future development which will result in currently vegetated areas being converted to non-vegetated areas comprised of public roads and/or residential lots. It is noted some of these areas may contain managed turf/garden areas, however for ease of reference has been excluded as non-vegetated on the basis that these areas will be developed as part of lots.




Table 2: Vegetation classification, effective slope and future management (continued)


Plot no.


Plot no.


2 - 6 AS 3959 classification (Figure 2): Woodland (Class B) Bushfire hazard level (Figure 3): Extreme Woodland vegetation is located within several lots within the site (Plot 2 and 3), in addition to the west (Plot 4), south-west (Plot 5) and south of the site (Plot 6). Woodland vegetation within the site is characterised by Banksia spp. over an overstorey of unmanaged grassland. Woodland vegetation to the south and west of the site is characterised principally by an overstorey of marri over an understorey of unmanaged grassland and occasional scattered native shrubs.

Photo location 3: Woodland vegetation to the south of the site

Photo location 5: Woodland vegetation in the south-eastern portion of the site

Photo location 4: Woodland vegetation to the south of the site

Photo location 6: Woodland vegetation to the west of the site

4 - 6 AS 3959 classification (Figure 4): Woodland (Class B) Effective slope (Figure 5): Flat/upslope Woodland vegetation located to the west and south-west of the site is assumed to remain in its existing state, and is therefore assumed to remain a bushfire risk to the site. Woodland vegetation to the south of the site is likely to be removed as part of future development, in accordance with the existing Local Structure Plan for Lot 348 Park Street, Brabham. However, as the timing for this development is unknown, this vegetation has been assumed to pose a bushfire risk to the site.






Plot no.


Plot no.


2 - 6 Continued from above. Continued from above. 14 AS 3959 classification (Figure 4): Non-vegetated area (Exclusion 2.2.3.2(e)) Effective slope (Figure 5): Not applicable Woodland vegetation within the site will be removed to facilitate future development which will result in currently vegetated areas being converted to non-vegetated areas comprised of public roads and/or residential lots. It is noted some of these areas may contain managed turf/garden areas, however for ease of reference has been excluded as non-vegetated on the basis that these areas will be developed as part of lots.






Plot no.


Plot no.


7 AS 3959 classification (Figure 2): Shrubland (Class C) Bushfire hazard level (Figure 3): Moderate A small area of shrubland vegetation has been identified to the south of the site. This vegetation is characterised by surface and near-surface fuel loads, and is associated with the wetland to the south. It is dominated by Xanthorrhoea spp.

Photo location 7: Shrubland vegetation to the south of the site

Photo location 8: Shrubland vegetation to the south of the site

7 AS 3959 classification (Figure 4): Shrubland (Class C) Effective slope (Figure 5): Flat/upslope Shrubland vegetation to the south of the site is likely to be removed as part of future development, in accordance with the existing Local Structure Plan for Lot 348 Park Street, Brabham. However, as the timing for this development is unknown, this vegetation has been assumed to pose a bushfire risk to the site.






Plot no.


Plot no.


8 – 13, 16

AS 3959 classification (Figure 2): Grassland (Class G) Bushfire hazard level (Figure 3): Moderate Grassland vegetation has been identified within the site (Plot 8), in addition to areas in the north (Plot 16), north-east (Plot 9 – 10), south (Plot 11) and west (Plot 12 – 13) of the site. Grassland vegetation within and surrounding the site is characterised by open areas of unmanaged grassland with surface and near-surface fuel loads of grassy weeds and occasional scattered paddock trees. It is noted that two drainage basins are location to the north-east (Plot 9) and north (Plot 16) of the site. These areas of unmanaged grassland include areas of open woodland within a mineral earth understorey and this area has therefore been classified in accordance with the description of grassland provided in Table 2.3 in AS 3959 to assume a worst-case bushfire scenario, given no active management appears to occur.

Photo location 9: Grassland vegetation to the south of the site

Photo location 11: Grassland vegetation to the west of the site

Photo location 10: Grassland vegetation to the east of the site

Photo location 12: Grassland vegetation in the south-western portion of the site

9 - 13

AS 3959 classification (Figure 4): Grassland (Class G) Effective slope (Figure 5): Flat/upslope Grassland vegetation associated with Plot 9 to the north-east of the site has been assumed to remain unmanaged as a worst-case bushfire scenario, although is expected to form part of POS as this area is developed for urban purposes. In accordance with the City of Swan Firebreak Notice, a 3 m-wide firebreak is assumed adjacent to the lot boundary. Grassland vegetation to the south of the site (Plot 11) is likely to be removed as part of future development, in accordance with the existing Local Structure Plan for Lot 348 Park Street, Brabham. However, as the timing for this development is unknown, this vegetation has been assumed to pose a bushfire risk to the site.






Plot no.


Plot no.


8 – 13, 16

Continued from above. Continued from above. 9 - 13

Grassland vegetation located to the north-east of the site (Plot 10) within existing rural-residential properties is assumed to remain in its current state, and will therefore remain a bushfire risk to the site. Similarly, grassland vegetation to the west of the site (Plot 12 - 13) is assumed to remain in its current state, and will remain a bushfire risk to the site.

14 AS 3959 classification (Figure 4): Non-vegetated area (Exclusion 2.2.3.2(e)) Effective slope (Figure 5): Not applicable Grassland vegetation within the site (Plot 8) will be removed to facilitate future urban development within the site which will result in currently vegetated areas being converted to non-vegetated areas comprised of public roads and/or residential lots. It is noted some of these areas may contain managed turf/garden areas, however for ease of reference has been excluded as non-vegetated on the basis that these areas will be developed as part of lots.






Plot no.


Plot no.


8 – 13, 16

Continued from above. Continued from above. 16 AS 3959 classification (Figure 4): Less than 1 ha in size and not within 100 m of other classified vegetation (Exclusion clause (b)) Effective slope (Figure 5): Not applicable A drainage basin has been identified to the north of the site, within an area of existing residential development. While the vegetation within the drainage sump appears to be unmanaged, it is less than 1 ha in size (being 2,772 m2) and is located more than 100 m from other areas of classified vegetation. Therefore, this vegetation has been excluded in accordance with Clause 2.2.3.2(b) of AS 3959.






Plot no.


Plot no.


14 AS 3959 classification (Figure 2): Non-vegetated area (Exclusion 2.2.3.2(e)) Bushfire hazard level (Figure 3): Low. As required under the Guidelines, any areas within 100 m of moderate or extreme hazards have been shown as moderate, to reflect the potential increased risk. Non-vegetated areas such as roads, driveways, existing residential buildings and areas of mineral earth within and surrounding the site have been excluded in accordance with Clause 2.2.3.2(e) of AS 3959.

Photo location 13: Non-vegetated area to the south of the site

Photo location 15: Non-vegetated area to the west of the site

Photo location 14: Non-vegetated area in the northern portion of the site

14 AS 3959 classification (Figure 4): Non-vegetated area (Exclusion 2.2.3.2(e)) Effective slope (Figure 5): Not applicable The existing maintenance regimes for all existing non-vegetated areas surrounding the site are assumed to continue in the long-term based on current land uses and management arrangements and/or future proposed land uses.






Plot no.


Plot no.


15 AS 3959 classification (Figure 2): Low threat vegetation (Exclusion 2.2.3.2(f)) Bushfire hazard level (Figure 3): Low. As required under the Guidelines, any areas within 100 m of moderate or extreme hazards have been shown as moderate, to reflect the potential increased risk. Low threat vegetation has been identified across the majority of the site, where landowners are complying with the City of Swan Firebreak Notice, which include maintaining 3 m-wide firebreaks and maintaining grass to a height of less than 10 cm, removing the surface and elevated fuel layers. In addition, low threat vegetation has been identified to the north of the site, within a managed parkland area. This vegetation has been identified as low threat as the vegetation is maintained to a low threat standard as identified in Clause 2.2.3.2(f) of AS 3959.

Photo location 16: Low threat vegetation within the southern portion of the site

Photo location 18: Low threat vegetation to the north of the site

Photo location 17: Low threat vegetation within the central portion of the site

14 AS 3959 classification (Figure 4): Non-vegetated area (Exclusion 2.2.3.2(e)) Effective slope (Figure 5): Not applicable Where vegetation within the site is identified as low threat, this will be converted to non-vegetated areas comprised of public roads and/or residential lots to support urban development. It is noted some of these areas may contain managed turf/garden areas, however for ease of reference has been excluded as non-vegetated on the basis that these areas will be developed as part of lots.






Plot no.


Plot no.


15 AS 3959 classification (Figure 4): Low threat vegetation (Exclusion 2.2.3.2(f)) Effective slope (Figure 5): Not applicable The maintenance regimes for all existing managed areas outside the site are assumed to continue in the future based on current land uses and management arrangements. Within the site, several areas of public open space are identified as part of the future structure plan, including the foreshore area and the gas pipeline easements. These areas will be managed to low threat as part of future development, in accordance with the City of Swan and community expectations. The management of these areas is further discussed in Section 5.1.2.




3.1.1.1 Post development assumptions

The BAL assessment, to determine the predicated BAL ratings applicable to the site, has assumed the

following:

• Designated FDI: 80

• Flame temperature: 1090 K

• Vegetation classification: Woodland (Class B), shrubland (Class C), and grassland (Class G) vegetation identified within the post-development scenario, see Figure 4.

• Effective slope beneath classified vegetation: flat/upslope (see Figure 5)

• Setback distances: as per Table 2.5 in AS 3959 with the relevant distances used to inform the BAL contour plan provided in Figure 6 and summarised in Table 3.

In addition to the above, the following key assumptions have informed this assessment:

• All classified vegetation within the site will be removed or modified to achieve low threat in accordance with Section 2.2.3.2 of AS 3959. This may include:

o Clearing of vegetation.

o Regular maintenance including removal of weeds and dead material.

o Where remnant trees are retained, low hanging branches will be low pruned to 2 m

from the ground.

o Application of ground covers such as mulch or non-flammable materials.

o Where grass/turf is present, this will be regularly cut so that the grass is maintained at

or below 100 mm in height.

• Areas outside the site within areas of public open space and private landholdings that have been

identified as low threat will continue to be managed and/or considered to achieve low threat (in

accordance with Section 2.2.3.2 of AS 3959) based on the existing maintenance regimes, and/or

as per the City of Swan Firebreak Notice.

• All classified vegetation surrounding the site has been assumed to remain in its existing state in

the future, and will therefore remain a bushfire risk to the site. This includes vegetation located

to the south of the site, which is located within the existing Local Structure Plan for Lot 348 Park

Street, Brabham. Whilst this area has a framework provided for future development, the

timeline for this is uncertain and will therefore assumed to remain a bushfire risk to the site.

• As discussed in Section 2.2, the central portion of the site encompasses two gas pipelines, the

DBNGP and the PGP. The easements associated with these pipelines will be landscaped to

achieve low threat standard in accordance with Section 2.2.3.2 of AS 3959, in addition to

complying with the relevant guidelines (DBNGP Land Use Guidelines (DoL 2016)). The specific

design of this area will be determined in consultation with the asset owner and the City of Swan.

• A foreshore area has been designated associated with Saint Leonards Creek, located in the

eastern portion of the site. The main conveyance feature of Saint Leonard’s Creek will be

planted/reshaped to support ‘Living Stream’ requirements. However, planting of the main

conveyance channel will form part of the broader active and passive recreation POS areas and

will be landscaped and managed to a low threat standard in accordance with Section 2.2.3.2 of

AS 3959. This will be in accordance with Liveable Neighbourhoods and Better Urban Water

Management principles.




3.1.2 Assessment outputs

The BAL assessment completed for the site indicates that a BAL rating of BAL-29 or less can be

achieved at future habitable buildings, across the majority of the site, except for the north-eastern

corner of the site, where BAL-29 is exceeded. Table 3 provides a summary of the setback distances

necessary from classified vegetation to achieve the indicated BAL ratings, with the BAL Contour Plan

(Figure 6) being a visual representation of these distances. The setback distances are based on the

post-development classified vegetation (Figure 4), effective slope (Figure 5) and are taken from Table

2.5 of AS 3959.

It is important to note that as part of future subdivision, should this area still be subject to a BAL

rating greater than BAL-29, development can be designed to ensure habitable buildings achieve BAL-

29 or less through in-lot setbacks or the location of public roads, and through the accommodation of

setback distances provided in Table 3.

Table 3: Setback distances based on vegetation classification and effective slope and Table 2.5 of AS 3959, as determined by the method 1 BAL assessment

Vegetation classification (see Figure 4)

Effective slope (see Figure 5)

Distance to vegetation (from Table 2.5 of AS 3959)

BAL rating

Woodland (Class B) Flat/upslope < 10 m BAL-FZ

10 - < 14 m BAL-40

14 - < 20 m BAL-29

20 - < 29 m BAL-19

29 - < 100 m BAL-12.5

> 100 m BAL-LOW

Shrubland (Class C) Flat/upslope < 7 m BAL-FZ

7- < 9 m BAL-40

9 - < 13 m BAL-29

13- < 19 m BAL-19

19 - < 100 m BAL-12.5

> 100 m BAL-LOW

Grassland (Class G) Flat/upslope < 6 m BAL-FZ

6 - < 8 m BAL-40

8 - < 12 m BAL-29

12 - < 17 m BAL-19

17 - < 50 m BAL-12.5

> 50 m BAL-LOW




4 Identification of Bushfire Hazard Issues

The adjoining land and the locality consists of predominantly managed vegetation or areas of urban

development. The locality is classed as a low/moderate bushfire hazard and represents an orderly

infill between established urban areas. From a bushfire hazard management perspective, the key

issues that are likely to require management and/or consideration as part of future development

within the site include:

• Provision of appropriate separation distance from bushfire hazards east, south and west of the

site to ensure a BAL rating of BAL-29 or less can be achieved at future habitable buildings (built

form). This is particularly relevant to the north-east portion of the site where unmanaged

grassland is likely to be located immediately adjacent to the boundary of the site, and will also

be a consideration as part of staged development.

• Provision of appropriate vehicular access to ensure that when development within the site is

fully constructed, egress to at least two different destinations will be available to residents,

visitors, future workers and emergency personnel. As part of staged development, temporary

access routes/egress may be required including emergency access ways or temporary

turnaround areas.

• Provision of appropriate water supply and associated infrastructure.

These issues are considered further in Section 5.




5 Assessment Against the Bushfire Protection Criteria

This BMP provides an outline of the mitigation strategies that will ensure that as planning and

development is progressed within the site, an acceptable solution and/or performance-based system

of control can be adopted for each of the bushfire protection criteria detailed within Appendix Four

of the Guidelines (WAPC and DFES 2017). The bushfire protection criteria identified in the Guidelines

and addressed as part of this BMP are:

• Element 1: Location of the development

• Element 2: Siting and design of the development

• Element 3: Vehicular access

• Element 4: Water supply.

As part of future development, it is likely that an ‘acceptable solution’ will be able to address the

intent of all four bushfire protection criteria as part of future development within of the site. A

summary of how this can be achieved and an associated compliance statement for each has been

provided in Table 4.




Table 4: Summary of bushfire protection criteria and compliance statement

Bushfire protection criteria

Intent Method of compliance Proposed bushfire management strategies Compliance statement

Acceptable solution

Performance principle

Element 1: Location

To ensure that strategic planning proposals, subdivision and development applications are located in areas with the least possible risk of bushfire to facilitate the protection of people, property and infrastructure.

A1.1 Development location Based on the outcomes of the bushfire hazard level (BHL) assessment, development (i.e. future habitable buildings) within the site will be located in an area subject to a low or moderate bushfire hazard level and is therefore able to achieve the criterion. The BAL contour plan (see Figure 6) indicates that the majority of the site will be able to achieve a BAL rating of BAL-29 or less. Based on the existing condition of the lot to the north-east of the site, this portion of the site is subject to a BAL rating exceeding BAL-29. As part of future subdivision, should this vegetation still exist, development can be designed to ensure habitable buildings achieve BAL-29 or less through in-lot setbacks or the location of public roads. Further planning at the subdivision application stage will inform the proposed lot layout for the site, with an updated BMP (and associated BAL assessment) to be prepared to ensure that future habitable buildings are able to achieve a BAL rating of BAL-29 or less.

Based on the outlined management measures, future development would be able to comply with and meet the intent of Element 1: Location.

Yes. N/A

Element 2: Siting and design

To ensure the siting and design of development minimises the level of bushfire impact.

A2.1 Asset Protection Zone One of the most important bushfire protection measures influencing the safety of people and property is to create an Asset Protection Zone (APZ) around buildings. The APZ is a low fuel area immediately surrounding a building, and can include non-flammable features such as irrigated landscapes, gardens, driveways, public roads and managed public open space. The structure plan, through the location of public roads, public open space and/or the depth of urban areas provides suitable separation to enable a BAL rating of BAL-29 or less to be achieved for future habitable buildings across the majority of the site. These areas will be maintained to a low threat standard (and achieve the requirements of an APZ) in accordance with the requirements of the City of Swan (both fire control notice and public road standards) and community expectations for urban areas. This involves the foreshore area, which while it will be planted along the main channel, will be maintained/managed in accordance with Liveable Neighbourhoods and Better Urban Water Management, and will support passive and active recreation.

Based on the outlined management measures, future development would be able to comply with and meet the intent of Element 2: Siting and design.

Yes. N/A




Table 4: Summary of bushfire protection criteria and compliance statement (continued)



Acceptable solution


Continued from above.


Continued from above. As development progresses the minimum distances detailed in Table 3 to achieve BAL-29 or less should be accommodated within future subdivision through public roads, public open spaces or with deeper lots (to accommodate in-lot setbacks) where necessary. This is particularly relevant for the north-eastern portion of the site, where BAL-29 is exceeded in areas of future residential development, however the size and layout of the structure plan will allow the bushfire risk to be accommodated appropriately as future development progresses within the site. Overall, the acceptable solution can be satisfied. Class 1, 2 and 3 buildings, where located within an area subject to a BAL rating higher than BAL-12.5 will be subject to higher construction standards in accordance with AS 3959.


Element 3: Vehicular access

To ensure vehicular access serving a subdivision/ development is available and safe during a bushfire event.

A3.1 Two access routes The proposed structure plan provides for an interconnected public road network within the site that will utilise existing public road connections to Old Lord Street to the west, Park Street to the south, Losino Boulevard to the north-east and Asturian Drive and Gnangara Road to the north of the site. As part of development within the site, additional road connections will be made to Park Street and Old Lord Street, in addition to the future Henley Brook Avenue to the east of the site. Immediate egress options will be available to the north and south of the site via Old Lord Street and future Henley Brook Avenue, in addition to east and west of the site via Park Street, and the future new Lord Street to the west.

Based on the outlined management measures, future development would be able to comply with and meet the intent of Element 3: Vehicular access.

Yes. N/A

A3.2 Public road Existing public roads within the site and surrounds, as well as proposed new public roads can and will comply with the minimum standards outlined in Appendix Four of the Guidelines (WAPC and DFES 2017) or as agreed with the City of Swan and includes a minimum 6 m-wide trafficable surface. Yes. N/A

A3.3 Cul-de-sac (including dead-end-road)

While cul-de-sacs should be avoided in bushfire prone areas, a single cul-de-sac is proposed within the south-eastern portion of the site. This cul-de-sac is still considered to meet the acceptable solution given the location of the site in an urbanised area and connection to the broader road network. This cul-de-sac, and any temporary cul-de-sacs required as part of staged development will be able to achieve: • A minimum trafficable surface of 6 m • A horizontal clearance of 6 m • Support a minimum weight of 15 tonnes • The length of the cul-de-sac is 200 m or less • Will have a turn-around area with a minimum 17.5 m diameter head.

Yes. N/A







Acceptable solution




A3.4 Battle-axe Not applicable. No battle-axe properties are proposed as part of structure plan. Continued from above.

N/A N/A

A3.5 Private driveway longer than 50 m

Not applicable. No private driveways longer than 50 m are proposed as part of the structure plan or likely based on the proposed urban development.

N/A N/A

A3.6 Emergency access way Given the proposed structure plan accommodates various access routes, emergency access ways are not required as part of the proposed development of the site. However, as part of future staged subdivision and/or development temporary emergency access ways may be required to provide access to different destinations and if required, these should as a minimum have a 6 m-wide trafficable surface suitable for two-wheel drive vehicles (but does not necessarily need to be constructed to a full public road standard).

N/A N/A

A3.7 Fire service access routes (perimeter roads)

Future development within the site will be provided with appropriate vehicular access, as outlined above, and therefore fire service access routes are not required.

N/A N/A

A3.8 Firebreak width Due to the typical lot sizes associated with the proposed residential land use, the requirement for firebreaks is not required to be met. Instead landholdings will be required to manage grass to a height of less than 5 cm, and install and maintain an asset protection zone (as required)., as per the City of Swan Firebreak Notice.

Yes. Yes.







Acceptable solution


Element 4: Water

To ensure water is available to the subdivision, development or land use to enable people, property and infrastructure to be defended from bushfire.

A4.1 Reticulated areas Development is located within an Emergency Services Levy (ESL) Category 1 area, which indicates that bushfire events are responded to by a network of career Fire and Rescue Service stations and the State Emergency Service. Fire response services require ready access to an adequate water supply during bushfire emergencies. The site will connect with a reticulated water supply and will include fire hydrants installed by the developer to meet the specifications of Water Corporation (Design Standard DS 63) (or similar standard, as agreed with the relevant water authority) and DFES. Fire hydrants on land zoned for residential purposes are generally required to be sited at or within 200 m of residential dwellings (Class 1a).

Based on the outlined management measures, future development would be able to comply with and meet the intent of Element 4: Water.

Yes. N/A

A4.2 Non-reticulated areas Not applicable.

N/A N/A

A4.3 Individual lots within non-reticulated areas (only for use if creating 1 additional lot and cannot be applied cumulatively)

Not applicable.

N/A N/A




5.1 Additional management strategies

5.1.1 Future approval considerations

The BAL assessment within this document is considered to be a conservative assessment of potential

bushfire risk posed to future habitable buildings within the site based on the proposed management

of vegetation and assumptions outlined in Section 3.

The measures to be implemented through this structure plan and associated future subdivision

process have been outlined as part of this BMP and can be used to support future planning and

development approval processes. A revised BMP is likely to be required to support any future

subdivision applications, particularly if the development layout detail is different to that outlined

within this document, and will need to respond to the subdivision design (and/or the stage of

development).

5.1.2 Landscape management

5.1.2.1 Within the site

A number of POS areas, including those for recreation, drainage, including the foreshore area, and

gas pipeline purposes, have been identified within the site.

The design and construction of POS areas is generally a condition of subdivision approval. The

detailed design of the public open space areas within the site will be determined in collaboration

with the City of Swan as part of the standard development process and is assumed to be designed to

achieve low threat vegetation in accordance with Section 2.2.3.2 of AS 3959, and in line with City of

Swan requirements. Management may include:

• Clearing of vegetation

• Irrigation of grass and garden beds (where required)

• Regular maintenance including removal of weeds and dead material

• Low pruning of trees

• Application of ground covers such as mulch or non-flammable materials

• Regularly mowing/slashing of grass to less than 100mm in height

The proponent will be responsible for the initial maintenance of these areas, and following handover

the City of Swan will be responsible for the long-term maintenance of the public open space areas to

a low threat standard.

5.1.2.2 Surrounding the site

Within private landholdings

The private landholdings surrounding the site are assumed to be managed by the applicable

landowners in accordance with the City of Swan Firebreak Notice in perpetuity and/or in accordance

with existing maintenance regimes. All other vegetation will remain in its existing condition for the

foreseeable future.




Existing public open space and public road reserves

Where existing areas of public open space, management to a low threat standard in accordance with

Section 2.2.3.2 of AS 3959 is assumed to continue. Management of these areas may include:

• Irrigation of grass and garden beds (where required)

• Regular removal of weeds and built up dead material (such as fallen branches, leaf litter etc.)

• Low pruning of trees.

• Application of ground/surface covers such as mulch or non-flammable materials as required.

• Regular mowing/slashing of grass to less than 100mm in height.

5.1.3 City of Swan Firebreak Notice

The City of Swan releases a Firebreak Notice on an annual basis to provide a framework for bushfire

management within the City. The City of Swan are able to enforce this notice in accordance with

Section 33 of the Bush Fires Act 1954. In addition, Section 33 1(b) also provides the City with

additional power to direct landowners to undertake works to remedy conditions conducive to the

outbreak or spread of bushfire.

Until subdivision is progressed within the site, existing landowners will be required to comply with

the Firebreak Notice, including the maintenance of minimum 3 m-wide perimeter firebreaks (or as

agreed with the City of Swan) for lots over 25,000 m2, and where lots are between 5,000 and

25,000 m2, the maintenance of minimum 3 m-wide perimeter firebreaks and the maintenance of

grass fuels below 10 cm in height.

All landowners of future lots will be required to comply with the Firebreak Notice as published, which

for residential lots is likely to include ensuring that the property is cleared of all flammable material,

except for living standing trees, and ensuring that grass height is no longer than 5 cm.

5.1.4 Vulnerable or high-risk land uses

Two primary schools are proposed within the structure plan and could be considered vulnerable land

uses. The proposed schools are located more than 100 m from bushfire hazards in the post-

development scenario (so are subject to BAL-LOW) and do not require specific construction in

accordance with SPP 3.7. Should vulnerable or high-risk land uses be proposed in the future, the

requirements of SPP 3.7 may need to be addressed at future development approvals (i.e.

subdivision/development application) (when specific detail on the land use is known) and may

include the preparation of an emergency evacuation plan and/or risk assessment for onsite

flammable materials where applicable. This is generally only a consideration where a BAL rating

greater than BAL-LOW applies.




5.1.5 Public education and preparedness

Community bushfire safety is a shared responsibility between individuals, the community,

government and fire agencies. DFES has an extensive Community Bushfire Education Program

including a range of publications, a website and Bushfire Ready Groups. The DFES publication

‘Prepare. Act. Survive.’ (DFES 2014) provides excellent advice on preparing for and surviving the

bushfire season. Other downloadable brochures are available from

http://www.dfes.wa.gov.au/safetyinformation/fire/bushfire/pages/publications.aspx

The City of Swan provides bushfire safety advice to residents available from their website

https://www.swan.wa.gov.au/Services-support/Emergency-management/Fire. Professional,

qualified consultants also offer bushfire safety advice and relevant services to residents and

businesses in high risk areas in addition that that provided in this BMP.

http://www.dfes.wa.gov.au/safetyinformation/fire/bushfire/pages/publications.aspx




6 Responsibilities for Implementation and Management of Bushfire Measures

Table 5 outlines the future responsibilities of the proponent/developer and the City of Swan

associated with implementing this BMP with reference to ongoing bushfire risk mitigation measures

for existing land uses (through compliance with the City of Swan Firebreak Notice) or future

mitigation measures to be accommodated as part of future subdivision (in particular, consideration

of spatial layout requirements). These responsibilities will need to be considered as part of the

subsequent planning process.

Additional bushfire mitigation responsibilities will be outlined as part of future BMP/s prepared to

support detailed subdivision for the site, including responsibilities for future lot owners.

Table 5: Responsibilities for the implementation of this BMP

Management action Timing

Developer/landowner

Provide a copy of this BMP to the relevant decision makers to support approval of the proposed structure plan.

To support the structure plan approval process.

Prepare a new/revised BMP in accordance with SPP 3.7, the Guidelines and AS 3959 to support future subdivision applications, based on the proposed detailed layout and in consideration of existing bushfire hazards or those that will be present following development. In addition, if the assumptions regarding the treatment to POS, the gas pipeline easements and/or the foreshore area change as part of future detailed design stages, a revised BMP will be required.

To support each future subdivision application.

Where required, and based on the outcomes this BMP or subsequent BMP/s, make spatial provision within the subdivision layout/design to accommodate: • A suitable public road network that provides access to at least two different destinations.

Public roads should be at least 6 m-wide and consider the minimum requirements of Appendix Four in the Guidelines (or as agreed with the City of Swan). The proposed structure plan currently supports this requirement.

• Where possible avoid cul-de-sacs and battle axe lots, or where utilised ensure these consider the general requirements outlined in Table 4 and Appendix Four of the Guidelines, or as agreed with the City of Swan.

• Ensure future habitable buildings are able to be located so that BAL-29 or less applies. Separation distances should be in accordance with the minimum distances outlined in Table 3 of this BMP for the corresponding vegetation plot/classification, or as determined in subsequent BMPs/BAL assessments. This may include the provision of public roads and/or managed public open space between habitable buildings and bushfire hazards, or by ensuring lots are an adequate depth or width to ensure BAL-29 is not exceeded at future habitable buildings.

To support each future subdivision application.

Comply with the City of Swan Firebreak Notice until subdivision progresses, including which for residential land greater than 25,000 m2, provide firebreaks of at least 3 m-wide and keep grass fuels short.

At all times, where applicable.




Management action Timing

City of Swan

Monitoring vegetation fuel loads in private landholdings against the requirements of the City’s Firebreak Notice (and/or existing maintenance regimes outlined in this BMP) and liaising with relevant stakeholders to maintain fuel loads at minimal/appropriate fuel levels.

Ongoing, as required.

Maintaining fuel loads in existing public road reserves and public open space (under their management) to appropriate standards to minimise fuel loads (as per current maintenance regimes)

Ongoing, as required.




7 Applicant Declaration

7.1 Accreditation

This BMP has been prepared by Emerge Associates who have been providing bushfire risk

management advice for more than six years, undertaking detailed bushfire assessments (and

associated approvals) to support the land use development industry.

Anthony Rowe is a Fire Protection Association of Australia (FPAA) Level 3 Bushfire Planning and

Design (BPAD) accredited practitioner (BPAD no. 36690) with over nine years’ experience and is

supported by a number of team members who have undertaken BPAD Level 1 and Level 2 training

and are in the processing of gaining formal accreditation.

7.2 Declaration

I declare that the information provided is true and correct to the best of my knowledge.

Signature:

Signature:

Name: Kirsten Knox

Company: Emerge Associates

Date: 19 July 2019

Name: Anthony Rowe

Company: Emerge Associates

Date: 19 July 2019

BPAD Accreditation: Level 3 BPAD no. 36690




8 References

8.1 General references

Department of Fire and Emergency Services (DFES) 2014, Prepare. Act. Survive., Perth. August 2014.

Department of Environment and Energy (DoEE) 2016, Approved Conservation Advice (incorporating

listing advice) for the Banksia Woodlands of the Swan Coastal Plain ecological community, Canberra.

Emerge Associates 2018a, Foreshore Area Report Brooklands Structure Plan Support, EP18-098(04)--

004 JRT Rev 1.

Emerge Associates 2018b, Level 1 Fauna Assessment Brooklands Structure Plan Support, EP18-

098(02)--005 MS, rev A.

Emerge Associates 2018c, Spring Flora and Vegetation Assessment - Brooklands Structure Plan

Support, EP18-098(01)--002, revision B.

Standards Australia 2018, AS 3959-2018 Construction of buildings in bushfire-prone areas, Sydney.

Western Australian Planning Commission (WAPC) 2007, Planning Bulletin 87 High Pressure Gas

Transmission Pipelines in the Perth Metropolitan Region, Perth.

Western Australian Planning Commission (WAPC) 2015, State Planning Policy 3.7 Planning in Bushfire

Prone Areas, Perth.

Western Australian Planning Commission and Department of Fire and Emergency Services (WAPC

and DFES) 2017, Guidelines for Planning in Bushfire Prone Areas Version 1.3, Western Australia.

December 2017.

8.2 Online references

Department of Water 2008, LIDAR derived 1 m elevation contours dataset, Government of Western

Australia.

Landgate 2019, Map Viewer, viewed July 2019, https://www0.landgate.wa.gov.au/maps-and-

imagery/interactive-maps/map-viewer

Office of Bushfire Risk Management (OBRM) 2019 Map of Bush Fire Prone Areas, viewed July 2019,

https://maps.slip.wa.gov.au/landgate/bushfireprone/

Figures

Figure 1: Site Location and Topographic Contours

Figure 2: Existing Conditions - AS 3959 Vegetation Classification

Figure 3: Existing Conditions – Bushfire Hazard Level

Figure 4: Post Development Conditions – AS 3959 Vegetation Classification

Figure 5: Post Development Conditions – Effective Slope

Figure 6: Bushfire Attack Level Contours

kyle.middleton

Bro c km an Street

Astur

i anDrive

Partrid

ge Str

eet

Murra

y Roa

d

Lawson

Road

Fores tview Bou le v a rd

Irwin Stre et

P inaster Pa rade

Horseshoe Circu it

Georgeff Street

Swan Street

Henley S tre et West

Robe

rt Stre

et

Henle

y Broo

k Aven

ue

Brook lan ds D rive

Saunders Street

John Street

Henley Street

Lord S

treet

Gnangara RoadWest Swan Road

Park Street

26

20 19

16

21

18

22 13

19

18

47 46 44 43 41 38

50

45

42

51

40

25 18

26

19

40

32

30

28

35

32

2927

50 45

48

45

39

35

2421

4544

49

47

4140

3836

3936

3835

33

32

3431

1615

1714

3937

37

36

3532

46

44

2928

15

1413

12

44

43

42

41

3736

37

36

34

33

25

23

1412

1312

2317

1717

16

35 33

31

23

22

20

48

36

42

39

3635

12

11

10

8

48

46

43

43

39

38

36

36

35

24

6

46

45

44

42

40

39

38

37

36 35 32

31

3130

17

45

4445

44

43

43

41

42

42

4241

40

40

40

40

40

40

38

39

38

38

383838

37

37

37

37

37

37

36

35

35

35

34

31

33

34

34

34

33

3334

33

3333

32

32

3232

3132

32

31

31

30 30

29

29

29

26

27

26

26

26

25

24

24

23

21

2120

19

13

14

16

15

15

1312

14

11

12

10

9

9

8

7

46

44

43

37

3232

32

31

29

28

402000

402000

404000

404000

6480

000

6480

000

6482

000

6482

000

Site boundary150 m assessment boundaryCadastral boundaryTopographic contour (mAHD)

While Emerge Associates makes every attempt to ensure the accuracy and completeness of data, Emerge accepts no responsibility for externally sourced data used

± GDA 1994 MGA Zone 50Scale: 1:17,500@A4

0 200 400 600

Metres

Little Property (WA) Pty LtdBushfire Management PlanHenley Brook Structure Plan

Site Location and Topographic ContoursFigure 1:

Project:Client:

Plan Number:EP18-098(08)--F51aDrawn:Date:Checked: Approved:Date:

KNM18/07/2019SCMKK18/07/2019

Site Location

kyle.middleton

¬!.¬!.

¬!.¬!.¬!.

¬!.

¬!.¬!.¬!.

¬!.

¬ !. ¬!.

¬!.

¬!.

¬!.

¬!.

¬!.

¬!.

Henley Brook Avenue

Brookland s D rive

Plot 4

Plot 4

Plot 3

Plot 6

Plot 2

Plot 5

Plot 2 Plot 1Plot 1

Plot7

Plot 13

Plot 8

Plot11

Plot 10

Plot12

Plot 9

Plot 14

Plot 14

Plot 14Plot 14

Plot 15

Plot 15

Plot 15

Plot 15Plot 15

Plot 16

Park Street

Lord Street

Henley Street

Robe

rt Stre

et

John Street

G eorgeff Street

Saunders Street

Andrea Drive

Losino Boulevard

Lawson

Road

Murra

y Roa

d

Arpent Link

Diane Place

Pine Street

Petrana Place

Chert Street

Gnangara Road

89

11

21

34

5

6

7

10

12 13

1415

16

17

18

401000

401000

402000

402000

403000

403000

404000

404000

6480

000

6480

000

6481

000

6481

000

Site boundary150 m assessment boundaryCadastral boundary

¬!. Photo location and directionAS 3959 vegetation classification

(A) Forest(B) Woodland(C) Shrubland(G) Grassland

2.2.3.2 Exclusions(e) Non vegetated area(f) Low threat vegetation



0 150 300 450

Metres


Existing Site Conditions - AS 3959 Vegetation ClassificationFigure 2:

Project:Client:


KNM18/07/2019SCMKK18/07/2019

kyle.middleton

Henley Brook Avenue

Plot 16

Brookland s D rive

Plot 4

Plot 4

Plot 3

Plot 6

Plot 2

Plot 5 Plot 6

Plot 2 Plot 1Plot 1

Plot 7

Plot 13

Plot 8Plot 11

Plot 10

Plot 12

Plot 9

Plot 14

Plot 14

Plot 14Plot 14

Plot 15

Plot 15

Plot 15

Plot 15Plot 15

Park Street

Lord Street

Henley Street

Robe

rt Stre

et

John Street

G eorgeff Street

Saunders Street

Andrea Drive

Losino Boulevard

Lawson

Road

Murra

y Roa

d

Arpent Link

Diane Place

Pine Street

Petrana Place

Chert Street

Gnangara Road

401000

401000

402000

402000

403000

403000

404000

404000

6480

000

6480

000

6481

000

6481

000

Site boundary150 m assessment boundaryCadastral boundary

Bushfire hazard ratingExtremeModerateLow



0 150 300 450

Metres


Existing Site Conditions - Bushfire Hazard LevelFigure 3:

Project:Client:


KNM18/07/2019SCMKK18/07/2019

sean.moylan

Henley Brook Avenue

Plot 14Plot 14

Brookland s D rive

Plot 4

Plot 4

Plot 6Plot 5 Plot 6

Plot 7

Plot 13

Plot 11

Plot 10

Plot 12

Plot 9

Plot 14

Plot 14

Plot 14Plot 14

Plot 14

Plot 15

Plot 15

Plot 15

Plot 15

Plot 15

Plot 16

Plot 15

Park Street

Lord Street

Henley Street

Robe

rt Stre

et

John Street

G eorgeff Street

Saunders Street

Andrea Drive

Losino Boulevard

Lawson

Road

Murra

y Roa

d

Arpent Link

Diane Place

Pine Street

Petrana Place

Gnangara Road

401000

401000

402000

402000

403000

403000

404000

404000

6480

000

6480

000

6481

000

6481

000

Site boundary150 m assessment boundaryCadastral boundaryStructure planForeshore area

AS 3959 vegetation classification(B) Woodland(C) Shrubland(G) Grassland

2.2.3.2 Exclusions(b) Vegetation <1 ha and >100 mfrom other classified vegetation(e) Non vegetated area(f) Low threat vegetation



0 150 300 450

Metres


Post Development Conditions - AS 3959 Vegetation ClassificationFigure 4:

Project:Client:


KNM18/07/2019SCMKK23/07/2019

sean.moylan

Henley Brook Avenue

Brookland s D rive

Plot 4

Plot 4

Plot 6Plot 5 Plot 6

Plot 7

Plot 13

Plot 11

Plot 10

Plot 12

Plot 9

Park Street

Lord Street

Henley Street

Robe

rt Stre

et

John Street

G eorgeff Street

Saunders Street

Andrea Drive

Losino Boulevard

Lawson

Road

Murra

y Roa

d

Arpent Link

Diane Place

Pine S

treet

Petrana Place

Gnangara Road

401000

401000

402000

402000

403000

403000

404000

404000

6480

000

6480

000

6481

000

6481

000

Site boundary150 m assessment boundaryCadastral boundaryStructure plan

Effective slopeFlat / upslopeDownslope 0 - 5°Downslope 5 - 10°Downslope 10 - 15°Downslope > 15°



0 150 300 450

Metres


Post Development Conditions - Effective SlopeFigure 5:

Project:Client:


KNM18/07/2019SCMKK23/07/2019

sean.moylan

Henley Brook Avenue

Park Street

Lord Street

Henley Street

Robe

rt Stre

et

John Street

Georgeff Street

Brooklands D ri ve

Saunders Street

Andrea Drive

Losino Boulevard

Lawson

Road

Murra

y Roa

d

Arpent Link

Diane Place

Pine S

treet

Petrana Place

Gnangara Road

402000

402000

403000

403000

404000

404000

405000

405000

6480

000

6480

000

6481

000

6481

000

Site boundary150 m assessment boundaryCadastral boundaryStructure plan

Bushfire Attack LevelBAL - FZBAL - 40BAL - 29BAL - 19BAL - 12.5BAL - LOW



0 200 400 600

Metres


Bushfire Attack Level ContoursFigure 6:

Project:Client:


KNM18/07/2019SCMKK23/07/2019

Please Note: This BAL contour plan has been prepared to detail the bushfirerisk posed by vegetation within 150 m of the site only, in accordance with theGuidelines and AS 3959. Any landholdings outside of the site should beassessed separately to inform development.

Inset 1

Inset 2

Inset 2

Inset 1

Appendix A Henley Brook Structure Plan (Burgess Design Group 2019)

POS 2

POS 9

1.8105ha

3.8789ha

1.5546ha

2.8455ha

Partridge Street

WC

1.8921haPOS 6

POS 4

Henley Street

Drive

POS 10

1.3007ha

Henley

New

4.1810ha

Place

POS 13

POS 3

3.5001ha

Old

PSPS

Street

0.7741haPOS 1

1.8106ha

Place

3.5005ha

LordBrooklands

Fairmount Blvd

Astu

rian

Driv

e

Gnangara Road

Street

Martingale A

ve

Pine Street

Andrea Drive

Petrana

Park Street

Martingale

A

ve

Pinaster Pde

Losino Blvd

Arpent Link

WC

POS 7

0.9482haPOS 8

POS 145.7756ha

POS 160.2901ha

NON-CREDITABLE

POS 115.4733ha

Brook

Lord

POSSIBLE ROADCROSSING, SUBJECT TOPIPELINE RISK ASSESSMENT

POS 150.4767ha

POS 121.5820ha

Ave

POS 50.5249ha

NORTH

Plan No:Date:

Client:Planner:22.07.19

PROGRESSMS/MB

CITY OF SWANHENLEY BROOK

HENLEY BROOK STRUCTURE PLANPLAN 1: STRUCTURE PLAN MAP

All areas and dimensions are subject to survey, engineering and detailed design

and may change without notice. © Copyright of Burgess Design Group.

LEGEND

STRUCTURE PLAN AREA

MRS RESERVES

OTHER REGIONAL ROAD

LOCAL SCHEME ZONES

RESIDENTIAL (R30-R60)

LOCAL SCHEME RESERVES

PUBLIC OPEN SPACE

PUBLIC PURPOSES - PRIMARY SCHOOL

PUBLIC PURPOSES - WATER CORPORATION

ROADS

INTEGRATOR B (25.2m)

NEIGHBOURHOOD CONNECTOR A (24.4m)

NEIGHBOURHOOD CONNECTOR B (19.4m)

ACCESS STREET A (20m)

ACCESS STREET B (18m)

ACCESS STREET C & D (10-15m)

SAFE ACTIVE STREET (15m)

LANEWAY (6m)

INDICATIVE EXTERNAL ROADS

OTHER

INDICATIVE ST LEONARDS CREEK ALIGNMENT(SUBJECT TO FURTHER ASSESSMENT)

GAS PIPELINE EASEMENT

NOISE MODELLING REQUIRED

POSSIBLE FUTURE LIFESTYLE VILLAGE

POSSIBLE FUTURE RAILWAY

ROUNDABOUT INTERSECTION

POSSIBLE BLACK COCKATOO ROOST TREETO BE RETAINED

PS

WC

0 100 200 300m

SCALE 1:7,500

5025

(A3)

Documents

Henley Brook Structure Plan€¦ · Bushfire Management Plan Henley Brook Structure Plan Prepared for Little Property (WA) Pty Ltd Doc No.: EP18-098(08)--010a| Version: A Project