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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 7HydroCAD® 10.00-21 s/n 01934 © 2018 HydroCAD Software Solutions LLC <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft/ft) (ft/sec) (cfs) <br />5.9 56 0.0269 0.16 Sheet Flow, <br />Grass: Short n= 0.150 P2= 2.75" <br />3.3 244 0.0120 1.24 Sheet Flow, <br />Smooth surfaces n= 0.011 P2= 2.75" <br />0.1 16 0.0120 2.22 Shallow Concentrated Flow, <br />Paved Kv= 20.3 fps <br />9.3 316 Total <br />Summary for Subcatchment K: <br />Runoff = 1.32 cfs @ 12.46 hrs, Volume= 5,708 cf, Depth= 1.26" <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 />* 5,686 98 New Impervious <br />48,527 80 >75% Grass cover, Good, HSG D <br />54,213 82 Weighted Average <br />48,527 89.51% Pervious Area <br />5,686 10.49% Impervious Area <br />Tc Length Slope Velocity Capacity Description <br />(min) (feet) (ft/ft) (ft/sec) (cfs) <br />10.8 152 0.1118 0.23 Sheet Flow, <br />Grass: Dense n= 0.240 P2= 2.75" <br />19.7 148 0.0236 0.13 Sheet Flow, <br />Grass: Dense n= 0.240 P2= 2.75" <br />1.1 148 0.0236 2.30 Shallow Concentrated Flow, <br />Grassed Waterway Kv= 15.0 fps <br />31.6 448 Total <br />Summary for Subcatchment L: <br />Runoff = 2.04 cfs @ 12.18 hrs, Volume= 5,266 cf, Depth= 1.89" <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 />* 17,714 98 New Impervious <br />15,775 80 >75% Grass cover, Good, HSG D <br />33,489 90 Weighted Average <br />15,775 47.11% Pervious Area <br />17,714 52.89% Impervious Area