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25443 - SL MOUNDS VIEW - PROPOSED <br /> 25443-PROPOSED MSE 24-hr 3 2-YR Rainfall=2.83" <br /> Prepared by Civil Site Group Printed 12/16/2025 <br /> HydroCADO 10.20-8a s/n 02202 ©2025 HydroCAD Software Solutions LLC Page 22 <br /> Summary for Pond 1 P: SOUTH FILTRATION BASIN 1 <br /> [92] Warning: Device #6 is above defined storage <br /> Inflow Area = 0.905 ac, 58.28% Impervious, Inflow Depth = 1.98" for 2-YR event <br /> Inflow = 2.53 cfs @ 12.17 hrs, Volume= 0.150 of <br /> Outflow = 0.16 cfs @ 13.40 hrs, Volume= 0.150 af, Atten= 94%, Lag= 73.3 min <br /> Primary = 0.16 cfs @ 13.40 hrs, Volume= 0.150 of <br /> Routed to Reach 1 R : TOTAL TO WETLAND <br /> Routing by Stor-Ind method, Time Span= 0.00-240.00 hrs, dt= 0.01 hrs <br /> Peak Elev= 908.66' @ 13.40 hrs Surf.Area= 2,555 sf Storage= 4,264 cf <br /> Plug-Flow detention time=851.5 min calculated for 0.150 of(100% of inflow) <br /> Center-of-Mass det. time= 851.6 min ( 1,624.6 - 773.0 ) <br /> Volume Invert Avail.Storage Storage Description <br /> #1 906.50' 7,379 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 /> 906.50 1,401 0 0 <br /> 909.75 3,140 7,379 7,379 <br /> Device Routing Invert Outlet Devices <br /> #1 Primary 904.25' 12.0" Round Culvert <br /> L= 66.0' RCP, mitered to conform to fill, Ke= 0.700 <br /> Inlet/ Outlet Invert= 904.25'/ 903.25' S= 0.0152 '/' Cc= 0.900 <br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.79 sf <br /> #2 Device 1 904.50' 6.0" Round Culvert <br /> L= 147.0' RCP, mitered to conform to fill, Ke= 0.700 <br /> Inlet/ Outlet Invert= 904.50'/ 904.50' S= 0.0000 '/' Cc= 0.900 <br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.20 sf <br /> #3 Device 2 906.50' 0.800 in/hr Exfiltration over Surface area <br /> #4 Device 1 908.60' 2.5' long x 0.40' rise Sharp-Crested Vee/Trap Weir <br /> Cv= 2.62 (C= 3.28) <br /> #5 Device 1 909.00' 4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) <br /> #6 Primary 911.25' 3.0' long x 2.0' breadth Broad-Crested Rectangular Weir <br /> Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 <br /> 2.50 3.00 3.50 <br /> Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 <br /> 2.85 3.07 3.20 3.32 <br /> Primary OutFlow Max=0.16 cfs @ 13.40 hrs HW=908.66' (Free Discharge) <br /> 1=Culvert (Passes 0.16 cfs of 6.59 cfs potential flow) <br /> 2=Culvert (Passes 0.05 cfs of 0.83 cfs potential flow) <br /> t3=Exfiltration (Exfiltration Controls 0.05 cfs) <br /> =Sharp-Crested Vee/Trap Weir(Weir Controls 0.11 cfs @ 0.77 fps) <br /> =Sharp-Crested Rectangular Weir( Controls 0.00 cfs) <br /> =Broad-Crested Rectangular Weir( Controls 0.00 cfs) <br />