Bushfire Hazard Assessment & Management Plan v4 - 7 Triller Court, Pomona

Bushfire Hazard Assessment & Management Plan v4                                        NCES REF: J000841
Lot 4 on SP320405 – 7 Triller Court, Pomona




7.2 State Planning Policy – Natural Hazards, Risk and Resilience
The Department of State Development, Manufacturing, Infrastructure and Planning’s State Planning
Policy – State interest guidance material – Natural hazards, risk and resilience – Bushfire (December
2019) contains the development assessment benchmarks for natural hazards, risk and resilience -
bushfire. The SPP assessment benchmarks prevail over those prescribed in the Noosa Plan
Bushfire Hazard Overlay Code where they involve the same design elements. An assessment of the
proposed development’s compliance with each of the assessment benchmarks has been provided
below.
Assessment Benchmark 4
Where reconfiguring a lot creating lots of greater than 2000 square metres (Lot 7):
To ensure emergency access and operational space for firefighters, include a development footprint
plan that is separated from the closest edge of the adjacent mapped medium, high or very high
potential bushfire intensity area by a distance that achieves a radiant heat flux level of 29 kilowatt
per square metre or less. To facilitate safe evacuation during a bushfire event, include a development
footprint plan that is located within 60 metres of the street frontage and sited to enable a route
between the development footprint plan and the street frontage with a gradient that does not exceed
of 12.5 per cent.
A building envelope has been nominated on Lot 7 which is provided with sufficient APZ separation
to the adjoining hazardous vegetation to comply with Assessment Benchmark 4. The APZ’s are to
be maintained in accordance with the landscape criteria specified in Section 5.6 for the life of the
development or until such time as an alternative setback can be justified (i.e. where assessment
methodologies change).
The maximum proposed access length is 331m to Lot 7 over gentle slopes which are less than 12.5
per cent. The proposed access design is bordered to the south by a low threat area consisting of
existing cleared rural residential development and proposed Lots 4-6, therefore the risk of
access/egress becoming constrained during a bushfire event is low. The driveway also directs
traffic/occupants in an easterly direction away from the most likely risk of a fire front approach being
from the north to north-west. Given the driveway length, it is recommended the road design satisfy
the QLD QFES Fire Hydrant and Vehicle Access Guidelines for Residential Commercial and
Industrial Lots 03/2019 ( refer Appendix 2). Particular attention is to be paid to cleared widths both
laterally and vertically and suitable turnaround areas for QFES MRV’s
Where reconfiguring a lot creating lots of 2000 square metres or less (i.e., Lots 4-8):
To ensure emergency access and operational space for firefighters the subdivision layout results in
lots that are sited so that they are separated from the closest edge to the adjacent medium, high or
very high potential bushfire intensity area by a distance that achieves a radiant heat flux level of 29
kilowatt per square metre or less.
1. The building envelope, if identified at RaL stage, or
2. Where a building envelope is not identified, at all the lot boundaries.
Building envelopes have been nominated within Lots 4-6 which are provided with sufficient APZ’s to
the adjoining hazardous vegetation to comply with Assessment Benchmark 4. All APZ’s are to be
maintained in accordance with the landscape criteria specified in Section 5.6 for the life of the
development or until such time as an alternative setback can be justified (i.e. where assessment
methodologies change).
Assessment Benchmark 5
Where reconfiguring a lot:
Subdivision design avoids locating lots (or for lots greater than 2000 square metres, avoids locating
the development footprint plan) that are within bushfire prone areas and on ridgelines, saddles and
crests where slopes exceed 15 per cent.
The development is positioned on a gently undulating hills with slopes below 15 per cent and
therefore complies with Assessment Benchmark 5.



© 2023                                            31