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MSE 24-hr 3 100-Year Rainfall=7.36"2039 Proposed
<br /> Printed 7/25/2022Prepared by Plowe Engineering, Inc.
<br />Page 5HydroCAD® 10.00-24 s/n 01574 © 2018 HydroCAD Software Solutions LLC
<br />Summary for Subcatchment N:
<br />Runoff = 13.79 cfs @ 12.14 hrs, Volume= 35,741 cf, Depth= 2.81"
<br />Runoff by SCS TR-20 method, UH=SCS, Weighted-Q, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs
<br />MSE 24-hr 3 100-Year Rainfall=7.36"
<br />Area (sf)CN Description
<br />* 41,200 98 New Impervious
<br />* 7,675 98 CSAH 85
<br />20,000 30 Woods, Good, HSG A
<br />83,553 39 >75% Grass cover, Good, HSG A
<br />152,428 Weighted Average
<br />103,553 37 67.94% Pervious Area
<br />48,875 98 32.06% Impervious Area
<br />Tc Length Slope Velocity Capacity Description
<br />(min) (feet) (ft/ft) (ft/sec) (cfs)
<br />7.0 Direct Entry,
<br />Summary for Subcatchment S:
<br />Runoff = 0.18 cfs @ 12.31 hrs, Volume=895 cf, Depth= 0.71"
<br />Runoff by SCS TR-20 method, UH=SCS, Weighted-Q, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs
<br />MSE 24-hr 3 100-Year Rainfall=7.36"
<br />Area (sf) CN Description
<br />12,500 36 Woods, Fair, HSG A
<br />2,613 39 >75% Grass cover, Good, HSG A
<br />15,113 Weighted Average
<br />15,113 37 100.00% Pervious Area
<br />Tc Length Slope Velocity Capacity Description
<br />(min) (feet) (ft/ft) (ft/sec) (cfs)
<br />13.9 145 0.1444 0.17 Sheet Flow,
<br />Woods: Light underbrush n= 0.400 P2= 2.86"
<br />Summary for Pond LA: ADJUSTED LOW AREA
<br />Inflow Area = 152,428 sf, 32.06% Impervious, Inflow Depth = 2.81" for 100-Year event
<br />Inflow = 13.79 cfs @ 12.14 hrs, Volume= 35,741 cf
<br />Outflow = 0.40 cfs @ 15.07 hrs, Volume= 35,742 cf, Atten= 97%, Lag= 175.7 min
<br />Discarded = 0.40 cfs @ 15.07 hrs, Volume= 35,742 cf
<br />Routing by Dyn-Stor-Ind method, Time Span= 0.00-100.00 hrs, dt= 0.01 hrs
<br />Peak Elev= 864.16' @ 15.07 hrs Surf.Area= 21,355 sf Storage= 21,088 cf
<br />Flood Elev= 864.90' Surf.Area= 23,025 sf Storage= 37,561 cf
<br />Plug-Flow detention time= (not calculated: outflow precedes inflow)
<br />Center-of-Mass det. time= 507.0 min ( 1,274.8 - 767.8 )
<br />Volume Invert Avail.Storage Storage Description
<br />#1 863.00' 64,250 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 />863.00 14,500 0 0
<br />864.00 21,000 17,750 17,750
<br />866.00 25,500 46,500 64,250
<br />Device Routing Invert Outlet Devices
<br />#1 Discarded 863.00'0.800 in/hr Infiltration over Surface area
<br />Discarded OutFlow Max=0.40 cfs @ 15.07 hrs HW=864.16' (Free Discharge)
<br />1=Infiltration (Exfiltration Controls 0.40 cfs)
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