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T:\0742114061June11 CityApplSurface Water\ <br />ER Landfill 06_2011-dead storage affect Type 1124-hr 100 yr Rainfall=5.90" <br />Prepared by Wenck Associates, Inc. Printed 8/15/2011 <br />HydroCAD~ 9.10 s/n 02201 ©2010 HydroCAD Software Solutions LLC Page 77 <br />Summary for Pond P-1: P-1 <br />[79] Warning:- Submerged Pond SW-pipe Primary device # 1 INLET by 0.65' <br />Inflow Area = 37.469 ac, 0.00% Impervious, Inflow Depth = 3.53" for 100 yr event <br />Inflow = 115.66 cfs @ 12.00 hrs, Volume= 11.026 of <br />Outflow = 12.78 cfs @ 12.88 hrs, Volume= 11.014 af, Atten= 89%, Lag= 52.6 min <br />Primary = 12.78 cfs @ 12.88 hrs, Volume= 11.014 of <br />Routing by Stor-Ind method, Time Span= 0.00-96.00 hrs, dt= 0.02 hrs <br />Starting Elev= 993.00' Surf.Area= 32,416 sf Storage= 126,087 cf <br />Peak Elev= 996.65' @ 12.88 hrs Surf.Area= 47,486 sf Storage= 271,494 cf (145,407 cf above start) <br />Plug-Flow detention time= 483.8 min calculated for 8.120 of (74% of inflow) <br />Center-of-Mass det. time= 181.6 min (1,159.8 - 978.2 ) <br />Volume Invert AvaiLStorage Storage Description <br />#1 986.00' 454,086 cf Custom Stage Data (Prismatic)Listed below (Recalc) <br />Elevation Surf.Area Inc.Store Cum.Store <br />(feet} (sq-ft) (cubic-feet) (cubic-feet) <br />986.00 0 0 0 <br />988.00 13 , 052 13, 052 13 , 052 <br />990.00 20,600 33,652 46,704 <br />992.00 28,383 48,983 95,687 <br />994.00 36,449 64,832 160,519 <br />996.00 44, 713 81,162 241, 681 <br />998.00 53,288 98,001 339,682 <br />1, 000.00 61,116 114,404 454, 086 <br />Device Routing Invert Outlet Devices <br />#1 Primary 993.00' 18.0" Round Culvert <br /> L= 1,550.0' CPP, mitered to conform to fill, Ke= 0.700 <br /> Inlet /Outlet Invert= 993.00' / 957.00' S= 0.0232 '/' Cc= 0.900 <br /> n= 0.013 Corrugated PE, smooth interior <br />Primary OutFlow Max=12.78 cfs @ 12.88 hrs HW=996.65' (Free Discharge) <br />L1=Culvert (Inlet Controls 12.78 cfs @ 7.23 fps) <br />