2018-08-10_PERMIT FILE - C1981019 ‎(4)‎

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 8/10/2018
• Doc Name: Power Line Light USe Road Small Area Exemption Demonstration
• Section_Exhibit Name: Volume 18, Exhibit 7 Item 25, Part D
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
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Structure Detail;
Structure #1 (Null
Undisturbed Watershed
Structure #2 (Grass Fi/tern
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) (%)
(N -sq m)
0.0054 6.0 0.86 0.15 20.000 2000.0 10.0 0.5
Grass Filter Results:
Total Infiltration Volume:
0.1116 ac -ft
Filter Infiltration Rate:
0.0694 cfs
Peak Flow Depth:
1.384 in
Critical Prone Velocity:
1.0367 fps
Wedge Location:
2.60 ft
Sediment Depth in Zone D:
0.0011 in
Trap Efficiency:
87.3 %
Structure #3 (Null)
SEDCAD Input
Filename: Power Line Light Use Road.sc4 Printed 06-20-2018