HomeMy WebLinkAboutFile Documents.834 W Hallam St.0010.2018 (54).ARBKChannel Report
Hydraflow Express Extension for Autodesk® AutoCAD® Civil 3D® by Autodesk, Inc.Wednesday, Apr 4 2018
17031-Hallam Street Capacity (Q100 Offsite=1.35 cfs)
Gutter
Cross Sl, Sx (ft/ft)= 0.020
Cross Sl, Sw (ft/ft)= 0.083
Gutter Width (ft)= 2.00
Invert Elev (ft)= 7911.50
Slope (%)= 0.50
N-Value = 0.016
Calculations
Compute by:Known Q
Known Q (cfs)= 1.35
Highlighted
Depth (ft)= 0.28
Q (cfs)= 1.350
Area (sqft)= 0.75
Velocity (ft/s)= 1.79
Wetted Perim (ft)= 8.21
Crit Depth, Yc (ft)= 0.29
Spread Width (ft)= 7.92
EGL (ft)= 0.33
0 2 4 6 8 10 12 14 16 18 20 22 24
Elev (ft)Depth (ft)Section
7911.00 -0.50
7911.50 0.00
7912.00 0.50
7912.50 1.00
7913.00 1.50
Reach (ft)
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The estimates Q100 into Hallam Street above this site is 1.35
cfs. This analysis utilizes a longitudinal road slope of 0.5%
since the roadway elevation peaks directing in front of the
property. The data above and the graph below indicate that
the peak flow for the Major Storm Event does not overtop the
curb and therefore, the building finish floor elevations do not
need to be 12" above the adjacent street curb flowline.
04/13/2018