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2021-01-18 GC - Item 3 - Attachment 4 - Cost Benefit Analysis for Noosaville Inundation Options
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Option 2 Extent protected (m2) 2040 2070 2100 Foreshore recreational 0 0 59,838 areas and football oval Properties (residential 0 5,108 55,729 and tourist) Roads (formed) - 28,491 138,122 Roads (unformed) 0 5,151 12,332 Stormwater pipes (m) 0 12,000 17,000 Note Data provided by HydraLogic and BMT Benefits Avoided road damage Assumption Value Source Total cost ($/m3) $858 Noosa Council Average depth (mm) 50 Noosa Council Lifespan without inundation 20 years Noosa Council Lifespan with infrequent 13.3 years Noosa Council inundation Lifespan with semi frequent 6.7 years Noosa Council inundation Semi frequent inundation >= 2 mins, 52 days per year HydraLogic Frequent inundation >= 1hrs, 157 days per year HydraLogic REPORT | Noosa Shire Council CHAP – Phase 7 12
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