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T:\074211406\June11 CityApp\Surface Water\ <br />ER Landfill 06_2011-dead storage affect Type 1124-hr 25 yr Rainfall=4.70" <br />Prepared by Wenck Associates, Inc. Printed 8/15/2011 <br />~droCAD® 9.10 s/n 02201 ©2010 HydroCAD Software Solutions LLC Paoe 38 <br />Summary for Pond P-1: P-1 <br />[79] Warning: Submerged Pond SW-pipe Primary device # 1 OUTLET by 1.60' <br />Inflow Area = 37.469 ac, 0.00% Impervious, Inflow Depth = 2.49" for 25 yr event <br />Inflow = 82.40 cfs @ 12.00 hrs, Volume= 7.786 of <br />Outflow = 10.22 cfs @ 12.77 hrs, Volume= 7.775 af, Atten= 88%, Lag= 46.0 min <br />Primary = 10.22 cfs @ 12.77 hrs, Volume= 7.775 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= 995.60' @ 12.77 hrs Surf.Area= 43,079 sf Storage= 224,323 cf (98,237 cf above start) <br />Plug-Flow detention time=- 587.5 min calculated for 4.881 of (63% of inflow) <br />Center-of--Mass det. time= 178.4 min (1,158.3 - 979.9 ) <br />Volume Invert Avail.Storage 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=10.22 cfs @ 12.77 hrs HW=995.60' (Free Discharge) <br />t-1=Culvert (Inlet Controls 10.22 cfs @ 5.79 fps) <br />