Appendix D - Bushfire Assessment · RAL26/0026

During the fire season, hot gusty westerly winds of over 30km/h can be expected, with relative humidity
falling below 15%. Typical seasonal fire winds within south-east Queensland originate from the north to
north-west to west to south-west.
The determination of whether a bushfire event is likely or unlikely to impact the site has been based on
the relative position of hazardous vegetation to the site Where hazardous vegetation is located upwind
of the site under dominant seasonal fire winds, the site is considered to be exposed to a likely probability
of impact. Where hazardous vegetation is located downwind of the site under typical seasonal fire winds,
the site is deemed to be exposed to an unlikely probability of impact.
4.3     RISK FROM IDENTIFIED HAZARDOUS VEGETATION
The Local Hazard Map prepared as Figure 3 indicates that the southern extent of the development area is
located within a Potential Impact Buffer and that hazardous vegetation is located to the south of the site.
As depicted in Plate 3, the landscape from the south-west to the south-east of the site contains extensive
areas of vegetation within Tewantin National Park, with the vegetation to the south-west located upwind
of the site under typical seasonal fire winds. Therefore, the site is deemed to be exposed to a likely
probability of bushfire impact at some time in the future.

The separation distance between the development area and the adjoining vegetation is the primary driver
of the assigned level of risk and is determined with consideration to the FLAMESOL modelling output
undertaken in Section 3.3 and presented as Appendix B. The development area is located within a
confirmed low potential bushfire intensity area; however, the southern extent of the proposed new
allotment is located within a Potential Impact Buffer Area associated with offsite vegetation subject to a
Medium Potential Bushfire Intensity.

The proposed building envelope within Lot 2 can be provided with sufficient separation to the identified
hazardous vegetation both internally and via the presence of the dual carriage road formation and
maintained road verges of McKinnon Drive. McKinnon Drive provides an approximately 25m wide
firebreak between the southern allotment boundary and the hazardous vegetation to the south. In
addition, the building envelope within the new allotment is setback 10m from the southern property
boundary. The internal separation is provided by areas of mown grass and a row of screening plants and
contains a discontinuous and low fuel load (VHC 39.2). Sufficient area is available within the proposed
new allotment so that a dedicated 10m wide managed low fuel zone can be maintained around future
built infrastructure. This low fuel zone can be provided wholly within the allotment and is able to be
maintained as a dedicated Asset Protection Zone. The available separation will provide the nominated
building envelope within Lot 2 a setback distance sufficient to achieve less than 29kW/m2 radiant heat
impact and will result in an acceptable level of bushfire risk to the development. Figure 4 depicts the
minimum setback needed to achieve the radiant heat setback requirements as prescribed under
Assessment Benchmark 4 of the SPP.




AUGUST 2026                  BUSHFIRE HAZARD ASSESSMENT & MANAGEMENT PLAN                           Page: 19
                                     380 MCKINNON DRIVE, COOROIBAH