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Type II 24-hr 10-year Rainfall=4.17"25018 Existing Hydro <br /> Printed 10/29/2025Prepared by Land & Resource Consulting Inc <br />Page 23HydroCAD® 10.20-7a s/n 12643 © 2025 HydroCAD Software Solutions LLC <br />Summary for Reach 3R: Driveway Culvert <br />Inflow Area = 14,400 sf, 19.44% Impervious, Inflow Depth = 3.53" for 10-year event <br />Inflow = 1.77 cfs @ 11.98 hrs, Volume= 4,238 cf <br />Outflow = 1.77 cfs @ 11.98 hrs, Volume= 4,238 cf, Atten= 0%, Lag= 0.1 min <br /> Routed to Pond 1P : Onsite Lowpoint <br />Routing by Stor-Ind+Trans method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs <br />Max. Velocity= 6.50 fps, Min. Travel Time= 0.1 min <br />Avg. Velocity = 1.86 fps, Avg. Travel Time= 0.3 min <br />Peak Storage= 8 cf @ 11.98 hrs <br />Average Depth at Peak Storage= 0.38' , Surface Width= 0.97' <br />Bank-Full Depth= 1.00' Flow Area= 0.8 sf, Capacity= 5.82 cfs <br />12.0" Round Pipe <br />n= 0.013 Concrete pipe, straight & clean <br />Length= 30.0' Slope= 0.0267 '/' <br />Inlet Invert= 960.10', Outlet Invert= 959.30' <br />Reach 3R: Driveway Culvert <br />Inflow <br />Outflow <br />Hydrograph <br />Time (hours) <br />727068666462605856545250484644424038363432302826242220181614121086420 <br />Fl <br />o <br />w <br /> <br /> <br />( <br />c <br />f <br />s <br />) <br />1 <br />0 <br />Inflow Area=14,400 sf <br />Avg. Flow Depth=0.38' <br />Max Vel=6.50 fps <br />12.0" <br />Round Pipe <br />n=0.013 <br />L=30.0' <br />S=0.0267 '/' <br />Capacity=5.82 cfs <br /> 1.77 cfs <br /> 1.77 cfs