21-0288-FS001-V2_GlenridgeDr_FS-reduced

                                                                                     Flow depth < 0.2m
                   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     Max Fill above
                AEP Peak          Required        AEP + 0.3m       Flood Level   Envelope / FFL   Natural
                Flood Level       Freeboard       freeboard        (m AHD)       (m AHD)          Ground (m)
                (m AHD)           (m)             (m AHD)

        1           13.24              0.3            13.54              13.52        13.54              0.4

        2           13.23              0.3            13.53              13.51        13.53              0.3

        3           13.21              0.3            13.51              13.51        13.51              0.3

        4           12.97              0.3            13.27              13.50        13.50              0.3

        5           13.21              0.3            13.51              13.52        13.52              0.5

        6           12.97              0.3            13.27              13.50        13.50              1.0

        7           12.57              0.3            12.87              13.48        13.48              0.9

        8*          12.57              0.3            12.87              13.48        12.87              0.0

      * Lot 8 has flood free access to Glenridge Road for refuge in the PMF event




21-0288-FS001-V2 | Flood Investigation | 60 Glenridge Drive, Cooroibah                                             | 14