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IVY PLACE - PROPOSED CONDITIONS <br /> 17059 - IVY PLACE - PROPOSED Type 1124-hr 100-YEAR Rainfall=7.50" <br /> Prepared by Microsoft Printed 7/17/2017 <br /> HydroCAD® 10.00-19 s/n 02202 ©2016 HydroCAD Software Solutions LLC Page 41 <br /> Summary for Pond 2P: UNDERGROUND FILT DET POND 2 <br /> Inflow Area = 0.190 ac, 46.56% Impervious, Inflow Depth > 5.72" for 100-YEAR event <br /> Inflow = 1.90 cfs @ 11.97 hrs, Volume= 0.091 af <br /> Outflow = 1.56 cfs @ 12.02 hrs, Volume= 0.088 af, Atten= 18%, Lag= 2.8 min <br /> Primary = 1.56 cfs @ 12.02 hrs, Volume= 0.088 af <br /> Routing by Stor-Ind method, Time Span= 0.00-20.00 hrs, dt= 0.01 hrs <br /> Peak Elev= 931.32' @ 12.02 hrs Surf.Area= 1,088 sf Storage= 813 cf <br /> Plug-Flow detention time= 45.0 min calculated for 0.088 af(97% of inflow) <br /> Center-of-Mass det. time= 32.1 min ( 779.1 -747.0 ) <br /> Volume Invert Avail.Storage Storage Description <br /> #1A 930.00' 494 cf 17.00W 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=1.55 cfs @ 12.02 hrs HW=931.32' (Free Discharge) <br /> 1=Culvert (Barrel Controls 0.07 cfs @ 3.14 fps) <br /> 2=Culvert (Inlet Controls 0.77 cfs @ 3.94 fps) <br /> 3=Culvert (Inlet Controls 0.71 cfs @ 3.63 fps) <br />