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RFI - 20220072 Ross Cr SWMP
Site Catchment Areas for DRAINS Modelling Project number: 20220072 Calculations: B. Parry Street Address: 15 Ross Crescent Locality: Sunshine Beach, NSC Date: 24/08/2022 Existing Site Existing Site Directly connected (m²) Indirectly connected (m²) 15 Ross Crescent Roof 129.8 129.8 - Impervious Ground 39.5 - 39.5 Driveway 85.1 85.1 - Total Imp 254.4 214.9 39.5 Total Per 351.9 - 351.9 Site Area 606.3 214.9 39.5 % impervious Effective DCIA = 75% DCIA ICIA +25% ineffective DCIA 161.2 93.2 Impervious 42.0% 26.6% 15.4% Pervious 58.0% Proposed Site Proposed Directly connected (m²) Indirectly connected (m²) 15 Ross Crescent Roof 295.8 295.8 - Impervious Ground 10.8 10.8 - Driveway 96.6 96.6 - Total Imp 403.2 403.2 - Total Per 203.1 - 203.1 Site Area 606.3 403.2 203.1 % impervious Effective DCIA = 75% DCIA ICIA +25% ineffective DCIA 302.4 100.8 Impervious 66.5% 49.9% 16.6% Pervious 33.5%
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