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IVY PLACE - PROPOSED CONDITIONS <br /> 17059 - IVY PLACE - PROPOSED Type 1124-hr 10-YEAR Rainfall=4.24" <br /> Prepared by Microsoft Printed 7/17/2017 <br /> HydroCAD® 10.00-19 s/n 02202 ©2016 HydroCAD Software Solutions LLC Page 28 <br /> Summary for Pond 2P: UNDERGROUND FILT DET POND 2 <br /> Inflow Area = 0.190 ac, 46.56% Impervious, Inflow Depth > 2.76" for 10-YEAR event <br /> Inflow = 0.96 cfs @ 11.97 hrs, Volume= 0.044 af <br /> Outflow = 0.73 cfs @ 12.03 hrs, Volume= 0.043 af, Atten= 24%, Lag= 3.3 min <br /> Primary = 0.73 cfs @ 12.03 hrs, Volume= 0.043 af <br /> Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs <br /> Peak Elev= 930.83' @ 12.03 hrs Surf.Area= 1,088 sf Storage= 575 cf <br /> Plug-Flow detention time= 57.8 min calculated for 0.043 af(97% of inflow) <br /> Center-of-Mass det. time= 46.4 min ( 810.8 - 764.3 ) <br /> Volume Invert Avail.Storage Storage Description <br /> #1A 930.00' 494 cf 17.00'W x 64.00'L x 1.50'H Field A <br /> 1,632 cf Overall - 397 cf Embedded = 1,235 cf x 40.0% Voids <br /> #2A 930.00' 397 cf CMP Round 12 x 24 Inside#1 <br /> Effective Size= 12.0"W x 12.0"H => 0.78 sf x 20.00'L = 15.6 cf <br /> Overall Size= 12.0"W x 12.0"H x 20.00'L <br /> 8 Rows of 3 Chambers <br /> 15.00' Header x 0.78 sf x 2 = 23.4 cf Inside <br /> 891 cf Total Available Storage <br /> Storage Group A created with Chamber Wizard <br /> Device Routing Invert Outlet Devices <br /> #1 Primary 930.00' 2.0" Round Culvert <br /> L= 22.0' RCP, square edge headwall, Ke= 0.500 <br /> Inlet/Outlet Invert= 930.00'/929.77' S= 0.0105 '/' Cc= 0.900 <br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.02 sf <br /> #2 Primary 930.40' 6.0" Round Culvert <br /> L= 22.0' RCP, square edge headwall, Ke= 0.500 <br /> Inlet/Outlet Invert= 930.40' /929.77' S= 0.0286 '/' Cc= 0.900 <br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.20 sf <br /> #3 Primary 930.50' 6.0" Round Culvert <br /> L= 22.0' RCP, square edge headwall, Ke= 0.500 <br /> Inlet/Outlet Invert= 930.50'/929.89' S= 0.0277 '/' Cc= 0.900 <br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.20 sf <br /> Primary OutFlow Max=0.73 cfs @ 12.03 hrs HW=930.83' (Free Discharge) <br /> -1=Culvert (Barrel Controls 0.06 cfs @ 2.53 fps) <br /> -2=Culvert (Inlet Controls 0.40 cfs @ 2.24 fps) <br /> -3=Culvert (Inlet Controls 0.27 cfs @ 1.96 fps) <br />