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0591335 Xcel Brainerd Facility MSE 24hr 3 100-Year Rainfal1=6.25"
<br /> Prepared by Rehder 8�Associates, Inc. Printed 12/21/2020
<br /> HydroCAD�10.00-21 s/n 02629 O 2018 HvdroCAD Software Solutions LLC Page 16
<br /> Tc Length Slope Velocity Capacity Description
<br /> _ (min) (feet) tft/ft) (ff/sec) (cfs)
<br /> 7•0 Direct Entry,
<br /> Summary for Subcatchment 4S: PROPOSED TO BASIN 3
<br /> Runoff = 14.34 cfs @ 12.17 hrs, Volume= 0.809 af, Depth= 4.43"
<br /> Runoff by SCS TR-20 method, UH=SCS, Weighted-CN,Time Span=0.00-48.00 hrs,dt=0.05 hrs
<br /> MSE 24-hr 3 100-Year Rainfall=6.25"
<br /> Area(ac) CN Description
<br /> '` 1.370 98 IMPERVIOUS
<br /> 0.820 61 >75% Grass cover, Good, HSG B
<br /> 2.190 84 Weighted Average
<br /> 0.820 37.44% Pervious Area
<br /> 1.370 62.56% Impervious Area
<br /> Tc Length Slope Velocity Capacity Description
<br /> (min) (feet) (ff/ft) (ft/sec) (cfs)
<br /> 10.0 Direct Entry
<br /> ,
<br /> Summary for Pond 5P: Infiltration Basin 1
<br /> Inflow Area = 5.120 ac, 65.82% Impervious, Inflow Depth = 3.20" for 100-Year event
<br /> Inflow = 14.66 cfs @ 12.17 hrs, Volume= 1.363 af
<br /> Outflow = 6.00 cfs @ 12.36 hrs, Volume= 1.272 af, Atten=59%, Lag= 11.2 min
<br /> Discarded = 0.12 cfs @ 12.36 hrs, Volume= 0.265 af
<br /> Primary = 5.88 cfs @ 12.36 hrs, Volume= 1.007 af
<br /> Routing by Dyn-Stor-Ind method,Time Span=0.00-48.00 hrs, dt=0.05 hrs
<br /> Peak Elev= 1,271.92' @ 12.36 hrs Surf.Area=6,317 sf Storage= 15,781 cf
<br /> Plug-Flow detention time= 212.4 min calculated for 1.271 af(93%of inflow)
<br /> Center-of-Mass det.time= 185.9 min (998.8-812.9 )
<br /> Volume Invert Avail Storaqe Storaqe Description
<br /> #1 1,268.00' 34,233 cf Custom Stage Data(Irregular)Listed below (Recalc)
<br /> Elevation Surt.Area Perim. Inc.Store Cum.Store Wet.Area
<br /> _ (feet) (sq ft) (feet) (cubic-feet) (cubic-feet) (sq-ft)
<br /> 1,268.00 2,350 235.0 0 0 2,350
<br /> 1,269.00 3,100 270.0 2,716 2,716 3,779
<br /> 1,270.00 3,955 305.0 3,519 6,235 5,406
<br /> 1,271.00 4,900 330.0 4,419 10,654 6,709
<br /> 1,272.00 6,455 465.0 5,660 16,314 15,259
<br /> 1,273.00 8,420 565.0 7,416 23,730 23,471
<br /> 1,274.00 12,735 635.0 10,503 34,233 30,183
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