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Attachment 3 - Stormwater Management Plan
Plans and drawings: the text below has words only, no drawings.
Site Catchment Areas for DRAINS Modelling Project number: 20220116 Calculations: B. Parry Street Address: 6 Martin St Locality: Peregian Beach, NSC Date: 6/09/2022 Existing Site Existing Site Directly connected (m²) Indirectly connected (m²) 6 Martin St Roof 336.0 336.0 - Impervious Ground 52.5 - 52.5 Driveway 103.9 103.9 - Total Imp 492.4 439.9 52.5 Total Per 390.4 - 390.4 Site Area 882.8 439.9 52.5 % impervious Effective DCIA = 75% DCIA ICIA +25% ineffective DCIA 329.9 162.5 Impervious 55.8% 37.4% 18.4% Pervious 44.2% Proposed Site Proposed Directly connected (m²) Indirectly connected (m²) 6 Martin St Roof 432.3 432.3 - Impervious Ground 77.8 - 77.8 Driveway 92.3 92.3 Total Imp 602.4 524.6 77.8 Total Per 280.4 - 280.4 Site Area 882.8 524.6 358.2 % impervious Effective DCIA = 75% DCIA ICIA +25% ineffective DCIA 393.5 209.0 Impervious 68.2% 44.6% 23.7% Pervious 31.8%
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