Laserfiche WebLink
MSE 24-hr 3 100-Year Rainfall=7.32"2021-07-20 Pond NEW DESIGN <br /> Printed 7/16/2021Prepared by j <br />Page 10HydroCAD® 10.10-3a s/n 03363 © 2020 HydroCAD Software Solutions LLC <br />Summary for Pond 2P: Stormtech <br />Inflow Area =0.749 ac, 79.61% Impervious, Inflow Depth = 6.75" for 100-Year event <br />Inflow =7.68 cfs @ 12.14 hrs, Volume=0.421 af <br />Outflow =5.21 cfs @ 12.20 hrs, Volume=0.421 af, Atten= 32%, Lag= 3.9 min <br />Primary =5.21 cfs @ 12.20 hrs, Volume=0.421 af <br />Routing by Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs <br />Peak Elev= 907.43' @ 12.20 hrs Surf.Area= 1,817 sf Storage= 3,818 cf <br />Plug-Flow detention time= 26.9 min calculated for 0.421 af (100% of inflow) <br />Center-of-Mass det. time= 26.8 min ( 775.1 - 748.2 ) <br />Volume Invert Avail.Storage Storage Description <br />#1A 904.00'1,662 cf 30.00'W x 60.58'L x 3.50'H Field A <br />6,361 cf Overall - 2,205 cf Embedded = 4,155 cf x 40.0% Voids <br />#2A 904.50'2,205 cf ADS_StormTech SC-740 +Cap x 48 Inside #1 <br />Effective Size= 44.6"W x 30.0"H => 6.45 sf x 7.12'L = 45.9 cf <br />Overall Size= 51.0"W x 30.0"H x 7.56'L with 0.44' Overlap <br />48 Chambers in 6 Rows <br />3,867 cf Total Available Storage <br /> Storage Group A created with Chamber Wizard <br />Device Routing Invert Outlet Devices <br />#1 Primary 903.50'12.0" Round Culvert <br />L= 69.0' RCP, square edge headwall, Ke= 0.500 <br />Inlet / Outlet Invert= 903.50' / 902.29' S= 0.0175 '/' Cc= 0.900 <br />n= 0.012 Concrete pipe, finished, Flow Area= 0.79 sf <br />#2 Device 1 904.00'2.000 in/hr Draintile over Surface area <br />#3 Device 1 904.50'8.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads <br />#4 Device 1 905.44'8.0" Vert. Orifice/Grate C= 0.600 Limited to weir flow at low heads <br />#5 Device 1 907.36'4.0' long Sharp-Crested Rectangular Weir 2 End Contraction(s) <br />Primary OutFlow Max=5.19 cfs @ 12.20 hrs HW=907.43' (Free Discharge) <br />1=Culvert (Passes 5.19 cfs of 7.00 cfs potential flow) <br />2=Draintile (Exfiltration Controls 0.08 cfs) <br />3=Orifice/Grate (Orifice Controls 2.71 cfs @ 7.76 fps) <br />4=Orifice/Grate (Orifice Controls 2.16 cfs @ 6.20 fps) <br />5=Sharp-Crested Rectangular Weir (Weir Controls 0.24 cfs @ 0.86 fps)