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• <br /> Popach Short Plat—2 Lots <br /> ROOF TOPS FLAT 0.072 <br /> DRIVEWAYS FLAT 0.003 <br /> 41 SIDEWALKS FLAT 0.01 <br /> Impervious Total 0.1 <br /> Basin Total 0.338 <br /> 41 Element Flows To: <br /> Surface Interflow Groundwater <br /> ANALYSIS RESULTS <br /> 411 Stream Protection Duration <br /> Predeveloped Landuse Totals for POC #1 <br /> Total Pervious Area:0.252 <br /> Total Impervious Area:0.086 <br /> 41 <br /> Mitigated Landuse Totals for POC #1 <br /> Total Pervious Area:0.238 <br /> Total Impervious Area:0.1 <br /> 41 Flow Frequency Return Periods for Predeveloped. POC #1 <br /> Return Period Flow(cfs) <br /> 2 year 0.141594 <br /> 5 year 0.210767 <br /> 10 year 0.262918 <br /> 25 year 0.336218 <br /> 41 50 year 0.396338 <br /> 100 year 0.461307 <br /> Flow Frequency Return Periods for Mitigated. POC #1 <br /> Return Period Flow(cfs) <br /> 2 year 0.037602 <br />• 5 year 0.054134 <br /> 10 year 0.066286 <br /> 25 year 0.083035 <br /> 50 year 0.09654 <br /> 100 year 0.110942 <br /> 41 <br /> Decrease in 100 year runoff= 0.461 — 0.111 = 0.35 cfs < 0.10 cfs <br /> WESTERN ENGINEERS,INC. 18 PROJECT:15-1463-A <br />