Appendix E - Bushfire Hazard Assessment · OPW19/0082

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         j     The ring main will also contain additional hydrants points with a 50mm cam lock fixture, to allow for
               connection by QFES rural appliances if and when required.
7        Furthermore, we note the proposal also includes a swimming pool and as such this water storage can also
         be included within the necessary water storage for bushfire suppression if and when required.

Conclusions

Based on our site inspection, our review of the Noosa Plan Bushfire Hazard Overlay Mapping and the State
Planning Policy, Natural Hazards, Risk and Resilience bushfire hazard mapping we have come to the following
conclusions: -

1        Based on the current land management practice within the subject site, the whole property can be effectively
         described as being in a bushfire buffer area,
2        Lake Cooroibah Road form a minimal 15.3 metres wide firebreak between the northern boundary of the site
         and the southern boundary of the Great Sandy National Park. Furthermore, this portion of the Great Sandy
         National Park is relatively isolated area and is bounded by cleared rural properties to the west and the Noosa
         River to the north and other cleared and partially cleared rural lands to the east and south along Lake
         Cooroibah Road.
3        The area of “bushland” within 400 Lake Cooroibah Road abutting the subject site is approximately 90 metres
         in length with the remaining portion of the property, some 138 metres consisting of mature trees along the
         property boundary to the adjacent area inside that property being subjected to regular mowing.
4        The sites western boundary abuts an area of vegetation within 384 lake Cooroibah Road with a vegetated
         interface of approximately 173 metres.
5        While the area around the site can be described as hazardous vegetation, the tenting structures are not
         considered to be Class 1, 2 or 3 structures and as such are not required to comply with the Australian
         Standard AS3959-2018. However, tents are mentioned in the Queensland Development Code under MP3.2
         and while AS/NZS 2293.1-1998 and AS/NZS 1851.1-1995 are referred to, while AS3959 is not referred to in
         the Qld Development Code.
6        However, it is reasonable to conclude that a minimum setback necessary to achieve a Radiant heat flux of
         29 kW/m2 is required particularly for those tenting structures which are to be located along the site’s western
         boundary, adjacent to 384 Lake Cooroibah Road. The reasoning is that while the tenting structures are not
         required to comply with AS3959 in Queensland, it is reasonable to conclude that if they were considered to
         be a Class 1 structure then under the State Planning Policy, Natural Hazards, Risk and Resilience draft
         bushfire code an acceptable level of risk is defined as that which exposes a structure to a maximum radiant
         heat flux of 29kW/m2 or a Bushfire Attack level 29.
7        Table 1 below provides the minimum radiant heat flux setback distances from the edge of the hazardous
         vegetation along the western boundary for those tenting structures abutting that boundary.
Table 1 – Minimal Radiant heat flux setback distances
Minimum Distance Calculator - AS3959-2009 (Method 2) - 396 Lake Cooroibah Rod, Cooroibah
Calculated March 18, 2019, 3:15 pm (MDc v.4.8)
                        Inputs                                              Outputs

    Fire Danger Index            47          Rate of spread                  0.9 km/h

    Vegetation classification    Woodland    Flame length                    8.83 m

    Surface fuel load            15 t/ha     Flame angle                     54 °, 64 °, 73 °, 78 °, 80 ° & 85 °

    Overall fuel load            24.5 t/ha   Elevation of receiver           3.44 m, 3.79 m, 3.96 m, 3.94 m, 3.9 m & 3.19 m

    Vegetation height            n/a         Fire intensity                  11,473 kW/m

    Effective slope              1°          Transmissivity                  0.871, 0.857, 0.836, 0.813, 0.799 & 0.724