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<br />SITE DRAINAGE NARRATIVE <br />PAGE 4 OF 4 <br />Rate Control <br /> <br />RATES TO SOUTH <br />2-YEAR STORM 10-YEAR STORM 100-YEAR STORM <br />Existing Proposed Existing Proposed Existing Proposed <br />(cfs) (cfs) (cfs) (cfs) (cfs) (cfs) <br />0.23 0.15 0.78 0.42 2.78 1.36 <br /> <br />RATES TO NORTH <br />2-YEAR STORM 10-YEAR STORM 100-YEAR STORM <br />Existing Proposed Existing Proposed Existing Proposed <br />(cfs) (cfs) (cfs) (cfs) (cfs) (cfs) <br />0.32 0.25 1.18 0.98 4.27 4.02 <br /> <br /> <br />Floodplain <br />The low area has a floodplain elevation of 864.9. Per the HydroCAD report: <br /> Existing volume below 864.9 = 35,701 cf <br /> Proposed volume below 864.9 = IESF + Basin Area <br /> = 3,654 + 34,909 cf <br /> = 38,563 cf <br /> <br />There is no net floodplain fill. <br />