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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 28 <br /> Summary for Pond 2P: NORTH FILTRATION BASIN 2 <br /> Inflow Area = 2.163 ac, 69.04% Impervious, Inflow Depth = 2.14" for 2-YR event <br /> Inflow = 6.48 cfs @ 12.17 hrs, Volume= 0.386 of <br /> Outflow = 3.74 cfs @ 12.29 hrs, Volume= 0.386 af, Atten= 42%, Lag= 6.9 min <br /> Primary = 3.74 cfs @ 12.29 hrs, Volume= 0.386 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= 909.18' @ 12.29 hrs Surf.Area= 3,378 sf Storage= 7,257 cf <br /> Plug-Flow detention time=514.9 min calculated for 0.386 of(100% of inflow) <br /> Center-of-Mass det. time= 515.0 min ( 1,283.2 - 768.2 ) <br /> Volume Invert Avail.Storage Storage Description <br /> #1 906.00' 14,543 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 /> 906.00 1,185 0 0 <br /> 911.00 4,632 14,543 14,543 <br /> Device Routing Invert Outlet Devices <br /> #1 Primary 903.75' 15.0" Round Culvert <br /> L= 20.0' RCP, mitered to conform to fill, Ke= 0.700 <br /> Inlet/ Outlet Invert= 903.75'/ 903.25' S= 0.0250 '/' Cc= 0.900 <br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 1.23 sf <br /> #2 Device 1 904.00' 6.0" Round Culvert <br /> L= 180.0' RCP, mitered to conform to fill, Ke= 0.700 <br /> Inlet/ Outlet Invert= 904.00'/ 904.00' S= 0.0000 '/' Cc= 0.900 <br /> n= 0.013 Corrugated PE, smooth interior, Flow Area= 0.20 sf <br /> #3 Device 2 906.00' 0.800 in/hr Exfiltration over Surface area <br /> #4 Device 1 908.50' 2.0' long x 1.00' rise Sharp-Crested Vee/Trap Weir <br /> Cv= 2.62 (C= 3.28) <br /> #5 Device 1 909.50' 4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) <br /> #6 Primary 910.50' 5.0' long x 8.0' 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 4.00 4.50 5.00 5.50 <br /> Coef. (English) 2.43 2.54 2.70 2.69 2.68 2.68 2.66 2.64 2.64 <br /> 2.64 2.65 2.65 2.66 2.66 2.68 2.70 2.74 <br /> Primary OutFlow Max=3.74 cfs @ 12.29 hrs HW=909.18' (Free Discharge) <br /> 1=Culvert (Passes 3.74 cfs of 11.43 cfs potential flow) <br /> 2=Culvert (Passes 0.06 cfs of 0.85 cfs potential flow) <br /> t3=Exfiltration (Exfiltration Controls 0.06 cfs) <br /> =Sharp-Crested Vee/Trap Weir(Weir Controls 3.68 cfs @ 2.70 fps) <br /> =Sharp-Crested Rectangular Weir( Controls 0.00 cfs) <br /> =Broad-Crested Rectangular Weir( Controls 0.00 cfs) <br />