2018-04-02_PERMIT FILE - C1981019 ‎(8)‎

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 4/2/2018
• Doc Name: Temporary Access Road Small Area Exemption Demonstration
• Section_Exhibit Name: Volume 18 Exhibit 7 Item 25C
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
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Structure Detail;
Structure #1(Nul/1
Undisturbed Watershed
Structure #Z (Grass Filter
Grass Filter
Grass Filter Inputs:
Stiffness
Roughness Grass Height Hydraulic Infiltration Factor Filter Length Filter Width Filter Slope
Coefficient (in) Spacing (in) Rate (iph) (ft) (ft) M(N-sq m)
0.0054 6.0 0.86 0.15 20.000 1949.0 10.0 7.f
Grass Filter Results:
Total Infiltration Volume:
0.0592 ac -ft
Filter Infiltration Rate:
0.0677 cfs
Peak Flow Depth:
0.302 in
Critical Prone Velocity:
1.0367 fps
Wedge Location:
0.00 ft
Sediment Depth in Zone D:
0.0125 in
Trap Efficiency:
85.0%
Structure #3
SEDCAD Input
NJ
Filename: Exhibit 7 Item 25C Grass Filter.sc4 Printed 01-22-2018