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MSE 24-hr 3 2-Year Rainfall=2.81"Proposed Conditions - Filtration <br /> Printed 12/27/2019Prepared by Larson Engineering <br />Page 5HydroCAD® 10.00-21 s/n 01934 © 2018 HydroCAD Software Solutions LLC <br />Area (sf) CN Description <br />14,731 80 >75% Grass cover, Good, HSG D <br />* 13,394 98 New Impervious <br />28,125 89 Weighted Average <br />14,731 52.38% Pervious Area <br />13,394 47.62% Impervious Area <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft/ft) (ft/sec) (cfs) <br />3.9 53 0.1698 0.22 Sheet Flow, <br />Grass: Dense n= 0.240 P2= 2.75" <br />9.8 73 0.0328 0.12 Sheet Flow, <br />Grass: Dense n= 0.240 P2= 2.75" <br />2.8 147 0.0067 0.89 Sheet Flow, <br />Smooth surfaces n= 0.011 P2= 2.75" <br />16.5 273 Total <br />Summary for Subcatchment F: <br />Runoff = 1.35 cfs @ 12.18 hrs, Volume= 3,490 cf, Depth= 1.81" <br />Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-90.00 hrs, dt= 0.01 hrs <br />MSE 24-hr 3 2-Year Rainfall=2.81" <br />Area (sf)CN Description <br />* 10,182 98 New Impervious <br />12,053 80 >75% Grass cover, Good, HSG D <br />* 871 98 Impervious <br />23,106 89 Weighted Average <br />12,053 52.16% Pervious Area <br />11,053 47.84% Impervious Area <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft/ft) (ft/sec) (cfs) <br />10.4 143 0.1083 0.23 Sheet Flow, <br />Grass: Dense n= 0.240 P2= 2.75" <br />Summary for Subcatchment G: <br />Runoff = 2.88 cfs @ 12.58 hrs, Volume= 15,025 cf, Depth= 1.45" <br />Runoff by SCS TR-20 method, UH=SCS, Split Pervious/Imperv., Time Span= 0.00-90.00 hrs, dt= 0.01 hrs <br />MSE 24-hr 3 2-Year Rainfall=2.81"