Att 5. BAL Report - 555 Louis Bazzo Dr

 Fire Scenario Site 2 West      Fire Scenario Site 2 West      Fire Scenario Site 2 East      Fire Scenario Site 2 East     Fire Scenario Site 2 North     Fire Scenario Site 2 North

 Method 2 AS3959-2018           Method 1 AS3959-2018           Method 2 AS3959-2018           Method 1 AS3959-2018          Method 2 AS3959-2018           Method 1 AS3959-2018
 FDI 50                         FDI 40                         FDI 50                         FDI 40                        FDI 50                         FDI 40
 [email protected]/23.8t/ha.        Forest                         [email protected]/23.8t/ha.        Forest                        [email protected]/23.8t/ha          Forest
 Effective Slope under          Effective Slope under          Effective Slope under          Effective Slope under         Effective Slope under          Effective Slope under
 vegetation 12⁰ Downslope       vegetation >10 -15˚            vegetation 9⁰ Downslope        vegetation >5 - 10⁰           vegetation 0˚ / Upslope        vegetation 0˚ / Upslope
                                Downslope                                                     Downslope
 Fire Intensity (Byram, 1959)                                  Fire Intensity (Byram, 1959)                                 Fire Intensity (Byram, 1959)
 35 630kW/m (”HIGH”)                                           28 968kW/m (”HIGH”)                                          15 568kW/m (”MEDIUM”)

 Rate of Spread (Noble et al,                                  Rate of Spread (Noble et al,                                 Rate of Spread (Noble et al,
 1980)                                                         1980)                                                        1980)
 2.9kph                                                        2.36kph                                                      1.27kph
 Flame Height (modified Mc                                     Flame Height (modified Mc                                    Flame Height (modified Mc
 Arthur V equation, NSW                                        Arthur V equation, NSW RFS                                   Arthur V equation, NSW
 RFS 2001) 21.69m                                              2001) 18.17m                                                 RFS 2001) 11.08m
 Flame Width 100m                                              Flame Width 100m                                             Flame Width 100m
 Elevation of Receiver 2.4m                                    Elevation of Receiver 2.4m                                   Elevation of Receiver 2.4m
 BAL FZ within 18m of intact    BAL FZ within 19m of intact    BAL FZ within 15m of intact    BAL FZ within 15m of intact   BAL FZ within 10m of intact    BAL FZ within 10m of intact
 unmanaged vegetation           unmanaged vegetation           unmanaged vegetation           unmanaged vegetation          unmanaged vegetation           unmanaged vegetation
 BAL 40 from 18 - <24m          BAL 40 from 19 - <25m          BAL 40 from 15 - <20m          BAL 40 from 15 - <20m         BAL 40 from 10 - <13m          BAL 40 from 10 - <13m
 BAL 29 from 24 - <33m          BAL 29 from 25 - <36m          BAL 29 from 20 - <29m          BAL 29 from 20 - <29m         BAL 29 from 13 - <19m          BAL 29 from 13 - <20m
 BAL 19 from 33 - <45m          BAL 19 from 36 - <49m          BAL 19 from 29 - <41m          BAL 19 from 29 - <41m         BAL 19 from 19 - <27m          BAL 19 from 20 - <29m
 BAL 12.5 from 45 – 100m        BAL 12.5 from 49 – 100m        BAL 12.5 from 41 – 100m        BAL 12.5 from 41 – 100m       BAL 12.5 from 27 – 100m        BAL 12.5 from 29 – 100m

Table 5. Calculated values for potential bushfire characteristics for Site 2 and methods used.

Projected fireline intensity from the west is approximately 35 630 KW/m, equating to “HIGH” as indicated under latest Council bushfire hazard mapping, and to
the east also rates as “HIGH” . The assessment validates classification of the area as BPA with required compliance against AS3959-2018.

The existing setback to the west of Site 2 provides more than 40m of setback, enabling a lower BAL rating to be potentially viable on this elevation.

The minimum setbacks for BAL 29 (under AS3959-2018) to be viable are highlighted in red above. This is important on the elevations interfacing with protected
vegetation, to the east and north.




For Site 3, (House Site) the fuel values from Section 3 are applied along with the other inputs for calculating design fire parameters, summarised in Table 6 below.


Report compiled by Bushfire Risk Reducers for Mr Tim Olah, June 2021                                     Page 20