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11-20-2017 Planning Commission Packet
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11-20-2017 Planning Commission Packet
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2/9/2018 8:40:00 AM
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2/9/2018 8:39:03 AM
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r . <br /> IVY PLACE - PROPOSED CONDITIONS <br /> 17059 - IVY PLACE - PROPOSED Type II 24-hr 1-YEAR Rainfall=2.47" <br /> Prepared by Microsoft Printed 7/17/2017 <br /> HydroCAD® 10.00-19 s/n 02202 ©2016 HydroCAD Software Solutions LLC Page 8 <br /> Summary for Subcatchment PR 1B: PROP DA 1B <br /> Runoff = 0.46 cfs @ 11.97 hrs, Volume= 0.020 af, Depth> 1.25" <br /> Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs <br /> Type II 24-hr 1-YEAR Rainfall=2.47" <br /> Area (sf) CN Description <br /> 3,863 98 Paved parking, HSG D <br /> 4,434 80 >75% Grass cover, Good, HSG D <br /> 8,297 88 Weighted Average <br /> 4,434 53.44% Pervious Area <br /> 3,863 46.56% Impervious Area <br /> Tc Length Slope Velocity Capacity Description <br /> (min) (feet) (ft/ft) (ft/sec) (cfs) <br /> 6.0 Direct Entry, <br /> Subcatchment PR 1B: PROP DA 1B <br /> Hydrograph <br /> 0.5= [1 Runoff <br /> 0.48' 0.46 cfs <br /> 0.0.4644",- Type II 24-hr <br /> °.442= 1-YEAR Rainfall=2.47" 100 <br /> 0. <br /> 0:36= Runoff Area=8,297 sf 1/ <br /> 0.34= <br /> 0.32= Runoff Volume=0.020 af 110 <br /> 0.3= <br /> °.28_ Runoff Depth>1.25" <br /> o.2s <br /> 0.24i- <br /> Tc=6.0 min i <br /> u- 0.22 <br /> °6 CN=88 <br /> 0.12 <br /> 0.1-7 <br /> 0.08 <br /> 0.04= RE <br /> rr,Z <br /> 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 <br /> Time (hours) <br />
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