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Clements Storage Retention Basin <br /> Preliminary calculations for site planning purposes <br /> Rev 0 08-22-19 <br /> Zone 1 <br /> Rural _ <br /> Total area: 233,788 <br /> Max basin area: 25,000 s.f. <br /> Ksat: 2.00 in/hr Ref:Tokay fine sandy loam <br /> _ Area _ Runoff Volume <br /> -- Surface (s.f.) Coefficient (ft) (cf.) <br /> Basin 1 25,000 1.00 0.27 6,750 <br /> Paving 700 0.95 0.27 180 <br /> _ Roof 62,640 0.80 0.27 13,530 <br /> Compacted earth 65,315 0.75 0.27 13,226 <br /> Landscape/other 80,133 0.20 0.27 4,327 <br /> Subtotal: 38,013 <br /> _Required basin capacity: 76,027 <br /> Approximate time to infiltrate: 32.8 hrs <br /> Basin Geometry: <br /> Top area: 25,000 <br /> Max pool area: 20,538 at 1.5'below top elevation <br /> Depth below max pool: 5.5 <br /> Total depth: 7.0 --- <br /> Bottom area: 7,270 <br /> Volume: 76,472 OK <br /> Note: For site planning purposes only.Site-specific design and/or testing and <br /> analysis of other surface water drainage options will be required prior to <br /> improvement plan development. <br /> QgYESSIpW. <br /> OF CALIFQ4� <br /> 08-22-19 <br />