2016-08-24_PERMIT FILE - C1981008

• Permit No: C1981008
• IBM Index Class Name: Permit File
• Doc Date: 8/24/2016
• Doc Name: Alternate Sediment Control Effluent Demonstration
• Section_Exhibit Name: Section 2.05.3‎(3)‎ Attachment 2.05.3‎(3)‎-34
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
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Structure Detail;
Structure #1(Grass Filter
Engineering Office - Grass Filter
Grass Filter Inputs:
Stiffness
0.0102 ac -ft
Roughness Grass Height Hydraulic Infiltration Factor
Filter Length Filter Width Filter Slope
Coefficient (in) Spacing (in) Rate (iph)
(ft) (ft) (%)
(N s4 m)
0.7266 fps
0.0096 3.0 0.59 0.10 0.700
230.0 35.0 2.9
Grass Filter Results:
Total Infiltration Volume:
0.0102 ac -ft
Filter Infiltration Rate:
0.0186 cfs
Peak Flow Depth:
0.139 in
Critical Prone Velocity:
0.7266 fps
Wedge Location:
0.31 ft
Sediment Depth in Zone D:
0.0088 in
Trap Efficiency:
90.1%
I
Filename: Attachment 2.05.3(3)-34 Engineering Office Effluent Demonstration.sc4 Printed 06-10-2016
Attachment 2.05.3(3)-34 Page 7 Revised: June 2016 (TR -73)