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2021-01-18 GC - Item 3 - Attachment 4 - Cost Benefit Analysis for Noosaville Inundation Options
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Avoided stormwater damage
Assumption Value Source
Total cost ($/m) – 300 mm $300 Noosa Council
pipe
Lifespan without inundation 30 years Noosa Council
Lifespan HAT 26 years Noosa Council
Lifespan MWHS 15 years Noosa Council
Avoided property damage
Assumption Value Source
Infrequent salinity damage $75/household/year Murray Darling Basin
Commission (Wilson, 2004)
Semi frequent salinity damage $250/household/year Murray Darling Basin
Commission (Wilson, 2004)
Regular salinity damage $2135/household/year Murray Darling Basin
Commission (Wilson, 2004)
Infrequent inundation >= 2 mins, 52 days per year HydraLogic
Semi frequent inundation >= 1hrs, 157 days per year HydraLogic
Regular inundation >=6hrs, 365 days per year HydraLogic
REPORT | Noosa Shire Council CHAP – Phase 7 13
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