5.2.-5.4. PCSR 09-13-2011 - Laserfiche WebLink

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T:\0742\1406\June11 CityApp\Surface Water\ ER Landfill 06_2011-dead storage affect Type 11 24-hr 25 yr Rainfall=4.70" Prepared by Wenck Associates, Inc. Printed 8/15/2011 HydroCAD® 9.10 s/n 02201 ©2010 HydroCAD Software Solutions LLC Page 32 Summary for Pond 26P: Wetland west of RR trail, NW of S Expansion Inflow Area = 53.329 ac, 0.23% Impervious, Inflow Depth > 1.96" for 25 yr event Inflow = 10.91 cfs @ 12.35 hrs, Volume= 8.724 of Outflow = 9.13 cfs @ 16.33 hrs, Volume= 8.717 af, Atten= 16%, Lag= 239.0 min Primary = 4.56 cfs @ 16.33 hrs, Volume= 4.358 of Secondary = 4.56 cfs @ 16.33 hrs, Volume= 4.358 of Routing by Stor-Ind method, Time Span= 0.00-96.00 hrs, dt= 0.02 hrs Starting Elev= 955.76' Surf.Area= 1.135 ac Storage= 0.562 of Peak Elev= 956.32' @ 16.33 hrs Surf.Area= 1.838 ac Storage= 1.392 of (0.830 of above start) Plug-Flow detention time= 210.1 min calculated for 8.153 of (93% of inflow) Center-of-Mass det. time= 76.7 min (1,262.6 - 1,185.9 ) Volume Invert Avail.Storage Storage Description #1 954.77' 6.337 of Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (acres) (acre-feet) (acre-feet) 954.77 0.000 0.000 0.000 956.00 1.410 0.867 0.867 958.00 4.060 5.470 6.337 Device Routing Invert Outlet Devices #1 Primary 955.76' 4.0' long x 20.0' breadth south weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 #2 Secondary 955.76' 4.0' long x 20.0' breadth north weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=4.56 cfs @ 16.33 hrs HW=956.32' (Free Discharge) L1=south weir (Weir Controls 4.56 cfs @ 2.03 fps) Secondary OutFlow Max=4.56 cfs @ 16.33 hrs HW=956.32' (Free Discharge) 2=north weir (Weir Controls 4.56 cfs @ 2.03 fps)