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T;1074211406\June11 CityApp\Surface Water\
<br />ER Landfill 06_2011-dead storage affect Type 1124-hr 900 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 Paae 79
<br />Summary for Pond P-2: SE pond
<br />Inflow Area = 16.288 ac, 0.00% Impervious, Inflow Depth = 3.53" for 100 yr event
<br />Inflow = 82.08 cfs @ 12.00 hrs, Volume= 4.791 of
<br />Outflow = 4.89 cfs @ 13.20 hrs, Volume= 4.764 af, Atten= 94%, Lag= 71.9 min
<br />Primary = 4.89 cfs @ 13.20 hrs, Volume= 4.764 of
<br />Routing by Stor-Ind method, Time Span= 0.00-96.00 hrs, dt= 0.02 hrs
<br />Starting Elev= 1,021.00' Surf.Area= 38,218 sf Storage= 119,575 cf
<br />Peak Elev= 1,023.64' @ 13.20 hrs SurF.Area= 50,286 sf Storage= 236,421 cf (116,846 cf above start).
<br />Plug-Flow detention time= 849.6 min calculated for 2.019 of (42% of inflow)
<br />Center-of-Mass det. time= 367.3 min (1,187.2 - 819.9 )
<br />Volume Invert AvaiLStorage Storaa e Description
<br />#1 1,016.00' 501,090 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 />1,016.00 0 0 0
<br />1,018.00 . 24,905 24,905 24,905
<br />1,020.00 33,771 58,676 83,581
<br />1,022.00 42,664 76,435 160,016
<br />1,024.00 51,937 94,601 254,617
<br />1,026.00 61,532 113,469 368,086
<br />1,028.00 71,472 133,004 501,090
<br />Device Routing Invert Outlet Devices
<br />#1 Primary 1,021.00' 12.0" Round Culvert
<br />L= 575.0' RCP, mitered to conform to fill, Ke= 0.700
<br />Inlet /Outlet invert= 1,021.00' / 998.00' S= 0.0400 '/' Cc= 0.900
<br />n= 0.012 Concrete pipe, finished
<br />Primary OutFlow Max=4.89 cfs @ 13.20 hrs HW=1,023.64' (Free Discharge)
<br />'L1=Culvert (Inlet Controls 4.89 cfs @ 6.22 fps)
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