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  • Level 1, 50 Subiaco Square Road Subiaco WA 6008 PO Box 243 Subiaco WA 6904 Phone (08) 9380 3100 Fax (08) 9380 4606 177 Spencer Street Bunbury WA 6230 PO Box 287 Bunbury WA 6231 Phone (08) 9792 4797 Fax (08) 9792 4708

    CED17335_01 M001 Rev A 21-Jul-17 1

    To: Nick Wheeler Date: 21 July 2017

    Company: Cedar Woods Properties Limited Project No: CED17335.01

    Fax/email: nick.wheeler@cedarwoods.com.au Inquiries: Zac Cockerill

    Bushfire Attack Level (BAL) Compliance Report Stage 1 Bushmead

    Site Details

    Address: 87 residential lots within Stage 1 Bushmead Suburb: Bushmead State: Western Australia Local Government Area: City of Swan Description of building works: Class 1a buildings with associated Class 10a buildings

    Report details

    Report/Job number: CED17335.01 Report version: M001 Rev A Assessment date: 13/07/2017 Report date: 21/07/2017 Report Review Endorsement

    Z Cockerill 21/07/2017 BPAD37803 Level 2 Accredited

    Introduction

    This Bushfire Attack Level (BAL) compliance report has been prepared for Stage 1 Bushmead (hereon referred to as the project area), located in the City of Swan. Lots within Stage 1 are subject to WAPC subdivision approval (Ref. 152785) and have been titled and released to market.

    This report provides a post-subdivisional works update of the BAL ratings for individual lots within Stage 1 and has been prepared for the benefit of the developer, future lot purchasers and decision-makers. BAL certificates for each individual lot have been prepared based on the final site compliance check and are appended to this report for use at the building permit stage. The BAL assessment outlined in this report is the most up to date assessment relating to the project area and therefore supersedes any previous Strategen BAL assessments undertaken within the project area.

    This approach is consistent with Section 4.2 of Guidelines for Planning in Bushfire Prone Areas (WAPC 2017).

    The BAL assessment has been completed by a Level 2 accredited Bushfire Planning and Design practitioner (Zac Cockerill, BPAD37803) in accordance with Method 1 of AS 3959–2009 Construction of Buildings in Bushfire-prone Areas (AS 3959; SA 2009) and results are consistent with on-ground conditions observed at the time of inspection on 13 July 2017.

    Should subdivision design or the classified vegetation extent be further modified prior to building construction, then an updated BAL assessment for the affected lots may need to be undertaken to account for these changes.

  • Bushfire Attack Level (BAL) Compliance Report

    CED17335_01 M001 Rev A

    21-Jul-17 2

    BAL assessment

    Results of the BAL assessment are provided in Figure 1 and a summary of assessment parameters are provided in the following subsections.

    Fire Danger Index

    A blanket rating of FDI 80 is adopted for Western Australian environments, as outlined in AS 3959 and endorsed by Australasian Fire and Emergency Service Authorities Council.

    Vegetation class

    Subdivisional works have resulted in the following exclusions within and adjacent to the project area:

    • the project area is in a cleared, non-vegetated state and is excluded from classification under Clause 2.2.3.2 (e)

    • POS to the northeast and northwest is in a predominantly cleared, managed low threat state and is excluded from classification under Clause 2.2.3.2 (f)

    • the 20 m wide Asset Protection Zone (APZ), as documented in the Strategen (2016) FMP addendum, has been implemented properly and is excluded from classification under both Clause 2.2.3.2 (e) for non-vegetated components (i.e. road reserves and cleared, vacant land) and Clause 2.2.3.2 (f) for managed low threat components (i.e. POS)

    • the 80 m wide Hazard Separation Zone (HSZ), as documented in the Strategen (2016) FMP addendum, has been implemented properly and consists of partially cleared, managed low threat vegetation and is excluded from classification under Clause 2.2.3.2 (f).

    Considering the above exclusions, the only remaining intact vegetation situated within 100 m of the project area is Class B woodland situated to the east within Kadina Brook foreshore reserve.

    The spatial extent of the assessed vegetation class and exclusions are depicted in Figure 1, along with site photo points to demonstrate the location and direction of the vegetation class and exclusions observed. The photo points depicted in Figure 1 relate to the georeferenced site photographs provided in Appendix 1.

    Effective slope

    Class B woodland situated to the east within Kadina Brook foreshore reserve is down-slope at >0– 5 degrees, as depicted in Figure 1.

    BAL calculations

    The BAL impact to the project area has been assessed in the form of BAL contours, utilising the assessment results outlined above. Results of the BAL contour assessment are outlined in Table 1 and depicted in the BAL contour map (Figure 1).

  • Bushfire Attack Level (BAL) Compliance Report

    CED17335_01 M001 Rev A

    21-Jul-17 3

    Table 1: BAL contour assessment Vegetation

    class Effective

    slope Separation distance (BAL contour width)

    BAL rating Comment

    Class B woodland

    >0– 5 degrees

    down- slope

  • Bushfire Attack Level (BAL) Compliance Report

    CED17335_01 M001 Rev A

    21-Jul-17 4

    Conclusion and recommendations

    This BAL compliance report has been prepared for Stage 1 Bushmead to provide a final BAL check for individual lots for use at the building permit stage. Assessment results are consistent with current on- ground conditions observed at time of inspection on 13 July 2017. Strategen can confirm that the existing FMP and FMP addendum over the site have been implemented as intended throughout the duration of subdivisional works for the relevant Stage 1 area and adjacent land.

    In the absence of any change in development design or post development classified vegetation extent, Strategen considers that the BAL assessment and BAL certificates outlined in this report are accurate to inform individual lot building permit applications.

    Should the extent of classified vegetation change or new vegetation be introduced within 100 m of proposed development, then the BAL should be reassessed at the building permit stage to ensure accuracy with on-ground conditions.

    Should it be determined through demonstration on the building plan that compliance with the recommended building setbacks has been achieved, and subsequently a lower BAL rating has been achieved, then the lower BAL rating should apply and be reflected in an updated BAL certificate.

    The BAL assessment outlined in this report is the most up to date assessment relating to the project area and therefore supersedes any previous Strategen BAL assessments undertaken within the project area.

    Ongoing requirements of the Strategen (2014) FMP, Strategen (2016) FMP addendum and current City of Swan annual firebreak notice should continue to be implemented as required, particularly with regards to ongoing fuel management of vacant land, POS, road reserves, APZs and HSZs.

  • Figure 1 BAL compliance: Stage 1 Bushmead

    Path: Q:\Consult\2017\CED\CED17335\ArcMap_documents\CED17335_G001_RevD.mxd

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    info@strategen.com.au www.strategen.com.au

    at A3

    Source: Aerial image & subdivision plan: Client 02/2016.

    Note that positional errors may occur in some areas

    0 30 60 m

    1:2,000

    Coordinate System: GDA 1994 MGA Zone 50

    Date: 21/07/2017

    Scale

    Author: JCrute

    ¹ Legend

    ! Photo location

    Lot boundary

    Public open space

    Class B woodland (>0-5 degrees down-slope)

    100m assessment area

    Bushmead development boundary

    Project area

    Cadastre

    20m wide APZ as per approved FMP addendum and LDP

    80m wide HSZ (as per approved FMP addendum

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