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updated flood investigation
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4.3.2.5. Flood Levels and Immunity
Flood levels around the site for the 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 1%
(2100) AEP peak flood event. The peak flood level and recommended minimum building
envelope / finished floor level (FFL) for each lot is provided in Table 4-5.
Table 4-5: Lot Levels Compared to Adjacent 1% (2100) AEP Peak Flood Levels
Lot 1% (2100) AEP Peak Flood Minimum Freeboard to Min Building Envelope
Level (m AHD) Floor (m) / FFL (m AHD)
1 13.24 0.5 13.74
2 13.23 0.5 13.73
3 13.21 0.5 13.71
4 12.97 0.5 13.47
5 13.21 0.5 13.71
6 12.97 0.5 13.47
7 12.57 0.5 13.07
8 12.57 0.5 13.07
Figure 4-2: 1% (2100) AEP Peak Water Surface Elevation Reporting Locations
21-0288-FS001-V1 | Flood Investigation | 60 Glenridge Drive, Cooroibah | 11
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