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Response to Information Request 10-6-2025 Overland Flow Assessment · OPW25/0042
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2.2.1.4 Severe Storm A severe storm assessment has been completed, which has assessed the 1% (2100) AEP, assuming stormwater network is 100% blocked. Figure 2.6 highlights the flood depths in this event, which highlights flow depth reach a maximum 0.7m (in upstream pit), with flow depths in channel being generally less than 0.5m. This mapping also highlights that flows are contained within the designated flow path and do not break out and impact the proposed development. Downstream of the site it is seen that flows are contained within the cul-de-sac of Serenity Plan and designated footpath, and do not impact the transformer pad or adjacent properties. FIGURE 2.6: EXCERPT OF SEVERE STORM DEPTH MAP - 1% (2100) AEP FULLY BLOCKED NOOSA CALILE I BBNE01676-0001-REP-001-1 13
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