Bushfire Hazard Assessment and Management Plan

Hazard Area 1 (HA1)
Hazard Area One (HA1) is represented by mapped remnant vegetation to the south and mapped regrowth vegetation to the
northeast, south and southwest of the subject site. It is mapped as RE12.5.3/RE12.5.2a at a ratio of 80/20. Given the dominant
percentage of the vegetation community is identified as 12.5.3 it is likely that this community would have the higher degree of
influence on the behaviour of f ire front. As such, this assessment will adopt the 12.5.3 vegetation classification for HA1,
described as Eucalyptus racemosa subsp. racemosa woodland on remnant Tertiary surfaces. HA1 covers a combined area of
approximately 60,900m2 and is located marginally downslope from the subject site.
Field assessment confirmed that the vegetation community within HA1 contains floristic characteristics representative of
RE12.5.3. The canopy layer for this RE is dominantly composed of Eucalyptus racemosa and Melaleuca quinquenervia with a
dense shrub layer of Casuarina sp. and regrowth Eucalyptus sp. The vegetation located south of the subject site and vegetation
associated with the waterway corridor is currently classified as a "medium" potential bushfire intensity under the NP2020 and
SPP Bushfire Prone Area Overlay, whilst the remaining vegetation within HA1 is classified as "high" potential bushfire intensity.
Based on the observed floral and structural characteristics, this assessment has adopted the corresponding fuel loads
associated with VHC 9.1 Moist to dry eucalypt open forests on coastal lowlands and ranges with a slope of 1.25° applied
calculated from 1m LIDAR contours.
HA1 has been treated as a distinct hazard area due to its combination of unique slope classification and RE which differs from
surrounding hazard areas and influences fire spread differently.
Table E below provides an assessment of the potential fire-line intensity of HA1 following Equation 1.

Table E - HA1 Bushfire Intensity Assessment
 Fuel Area          VHC               PFL (t/ha)          Slope (o)           FFDI               PFI (kW/m)        Hazard Class
 HA1                9.1               24.2                1.25                47                 18,604            MEDIUM



The table above shows that HA1 is considered a Medium hazard area and does not conform with the classification detailed in the
local and state hazard mapping with different spatial configuration, likely due to updated aerial imagery and regional ecosystem
mapping.
Hazard Area 2 (HA2)
Hazard Area Two (HA2) is mapped remnant vegetation classified as RE12.5.2a, described as Corymbia intermedia, Eucalyptus
tereticornis woodland on remnant Tertiary surfaces. It occupies approximately 26,600m2 situated in the northeast of the study
area, and is located upslope of the subject site.
Field observations confirm floristic features matching RE12.5.2a. The canopy consists mainly of a co-dominance of and this
vegetation is mapped as “high" potential bushfire intensity under the NP2020 and SPP Bushfire Prone Area Mapping. The
canopy layer for this RE is dominantly composed of Corymbia intermedia and Eucalyptus tereticornis with shrub layer of various
Casuarina sp and Eucalyptus regrowth with isolated occurrences of introduced species such as Syagrus romanzoffiana and
Schefflera actinophylla. The vegetation is currently classified as a "high" potential bushfire intensity under the NP2020 and SPP
Bushfire Prone Area Overlay.
Fuel loads associated with VHC 9.1 Moist to dry eucalypt open forests on coastal lowlands and ranges have been applied to this
area with aslope of 1° concurrent with “upslope” categorisation as defined in AS3959:2018.
Table F below provides an assessment of the potential fire-line intensity of HA2 following Equation 1.

Table F - HA2 Bushfire Intensity Assessment
 Fuel Area          VHC               PFL (t/ha)          Slope (o)           FFDI               PFI (kW/m)        Hazard Class
 HA1                9.1               24.2                1.0                 47                 18,286            MEDIUM



The table above shows that HA1 is considered a Medium hazard area and does not conform with the classification detailed in the
local and state hazard mapping with different classification and spatial configuration, likely due to slope catergorisation and
updated regional ecosystem mapping.


www.thereforgroup.com.au    24-0565E/BF | Sunshine Butterflies | Bushfire Management Plan | 12.03.2026 | Version 1.0              17