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Approved Plans - RAL21/0033
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1% AEP WSL
Internal Road
Figure 4-1: Section Across Internal Road Extension
4.3.2.5. Flood Levels and Immunity
Flood levels around the site for the Defined Flood Event (DFE) (i.e. 1% (2100) AEP) are detailed
for various reporting locations as shown in Figure 4-2. This shows the proposed new building
envelopes are above the DFE level. The recommended minimum building envelope /
finished floor level (FFL) for each lot has been taken as the greater of the DFE + freeboard
(0.3m) or the PMF, as summarised in Table 4-5.
Table 4-5: Recommended Minimum Building Envelope and Finished Floor Level
Lot 1% (2100) Minimum 1% (2100) PMF Peak Min Building
AEP Peak Required AEP + 0.3m Flood Level Envelope / FFL
Flood Level Freeboard freeboard (m AHD) (m AHD)
(m AHD) (m) (m AHD)
1 13.24 0.3 13.54 13.52 13.54
2 12.99 0.3 13.29 13.51 13.51
3 12.99 0.3 13.29 13.52 13.52
4 12.99 0.3 13.29 13.53 13.53
5 12.99 0.3 13.29 13.52 13.52
6 12.58 0.3 12.88 13.50 13.50
7 12.58 0.3 12.88 13.48 13.48
8 12.48 0.3 12.78 13.46 13.46
21-0288-FS001-V5 | Flood Investigation | 60 Glenridge Drive, Cooroibah | 14
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