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

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T:\074211406\June11 CityApp\Surface Water\ ER Landfill 06_2011-dead storage affect Type 11 24-hr 100 yr Rainfall=5.90" Prepared by Wenck Associates, Inc. Printed 8/15/2011 HydroCAD® 9.10 s/n 02201 ©2010 HydroCAD Software Solutions LLC Page 75 Summary for Pond EX-26P: Existing Wetland west of RR trail, NW of S Expansion Inflow Area = 15.860 ac, 0.76% Impervious, Inflow Depth = .1.30" for 100 yr event Inflow = 13.08 cfs @ 12.29 hrs, Volume= 1.718 of Outflow = 2.88 cfs @ 13.34 hrs, Volume= 1.718 af, Atten= 78%, Lag= 62.9 min Primary = 2.88 cfs @ 13.34 hrs, Volume= 1.718 of Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0.000 of Routing by Stor-Ind method, Time Span= 0.00-96.00 hrs, df= 0.02 hrs Starting Elev= 955.76' Surf.Area= 1.135 ac Storage= 0.562 of Peak Elev= 956.17' @ 13.34 hrs Surf.Area= 1.641 ac Storage= 1.133 of (0.572 of above start) Plug-Flow detention time= 458.4 min calculated for 1.156 of (67% of inflow) Center-of--Mass det. time= 185.0 min (1,105.4 - 920.4 ) Volume Invert AvaiLStorage 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 Broad-Crested Rectangular 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 957.87' 4.0' long x 20.0' breadth Broad-Crested Rectangular 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=2.88 cfs @ 13.34 hrs HW=956.17' (Free Discharge) L1=Broad-Crested Rectangular Weir(Weir Controls 2.88 cfs @ 1.74 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=955.76' (Free Discharge) 2=Broad-Crested Rectangular Weir(Controls 0.00 cfs)