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3850 Watertown Road
<br /> 3850 Watertown Road Type I124-hr 10-YR Rsinfal1=4.25"
<br /> Prepared by Sunde Engineering, PLLC. Printed 1/6/2015
<br /> H roCAD�10.00 s/n 02350 �2013 HydroCAD Software Solutions LLC Pa4e 4
<br /> Area s CN Descri tion
<br /> * 76,065 98 Impervious
<br /> 19,840 85 Gravel roads, HSG B
<br /> 580,fi35 69 Pasture/grassiand/range, Fair, HSG B
<br /> 87,908 60 Woods, Fair, HSG B
<br /> 131,542 79 5U-75% Grass cover, Fair, HSG C
<br /> 895,990 72 Weighted Average
<br /> 819,925 91.51% Pervious Area
<br /> 76,065 8.49% Impenrious Area
<br /> Tc Length Slope Velocity Capacity Descrlptfon
<br /> (min) (feet) tft/ft) {fUsec) (cfs)
<br /> 2d.0 Direct Entry, Assumed �� ^
<br /> Summary for Subcatchment 12S:
<br /> Runoff - 36.33 cfs @ 12.14 hrs, Volume= 2.807 af, Depth= 1.64"
<br /> Runoff by SGS TR-20 method, UH=SCS, Weighted-CN, Time Span= 0.00-72.U0 hrs, dt= 0.05 hrs
<br /> Type II 24-hr 10-YR Rainfall=4.25"
<br /> Area s C N Dsscn �on
<br /> " 7fi,065 98 Impervious
<br /> 19,&40 85 Gravei roads, HSG B
<br /> 580,635 69 Pasture/grassland/range, Fair, HSG B
<br /> 87,908 60 Woods, Fair, HSG B
<br /> 13�,542 79 50-75% Grass cover, Fair, HSG C
<br /> 895,990 72 Weighted Average "
<br /> 819,925 91.51°� Pervious Area•
<br /> 76,065 8.49°� Impenrious Area
<br /> Tc Length Slope Velocity Capaci#y Description
<br /> (min) _ (feet) (ft/ft) (ft/sec) (cfs)
<br /> 20.0 Dlrect Entry�Assumed �
<br /> Summary for Pond '!P: Existing no Draintile
<br /> Inflow Anea = 20.569 ac, 8.49°� Irnpervious, Inftaw Depth= 1.64" for 10-YR svent
<br /> Ir�flow = 36.33 cfs @ 92.14 hrs, Volurne= 2.$07 af
<br /> Oukflow = 0.00 cfs @ 0.00 hrs, Volume= 0.000 af, Atten= 100%, [.ag= 0.0 min
<br /> Prlmary = O.OQ cfs Q 0.00 hrs, Volume= 0.000 af
<br /> Routing by Stor-Ind method, Time Span=0.00-72.00 hrs, dt� 0.05 hrs
<br /> Starting Elsv=995.95' Surf.Area= 4,920 sf Storage=692 cf
<br /> Peak Efev= 995.49' �25.15 hrs Surf.Area=80,637 sf Storage= 122,981 cf (122,289 cf abo�e staR}
<br /> Plug-Flow detention time= (not calculated: initlal storage exceeds outFlow)
<br /> Center-af-Mass det. time= (not calculated: no outflow)
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