2019-02-01_PERMIT FILE - C1981019 ‎(3)‎

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 2/1/2019
• Section_Exhibit Name: Exhibit 07 Item 18 Small Area Exemption Demonstration - Gulch A Watershed
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
Structure Detail;
Structure #1 (Grass Filter)
Grass Filter
Grass Filter Inputs:
Stiffness
Roughness Grass Height Hydraulic Infiltration Factor i Filter Length Filter Width Filter Slope
Coefficient (in) Spacing (in) Rate (iph) (ft) (ft) M
(N -sq m)
0.0054 8.0 0.86 0.15 20.0001 3041.0 10.0 2.'
Grass Filter Results:
Total Infiltration Volume:
0.0946 ac -ft
Filter Infiltration Rate:
0.1056 cfs
Peak Flow Depth:
0.457 in
Critical Prone Velocity:
1.0367 fps
Wedge Location:
3.89 ft
Sediment Depth in Zone D:
0.0036 in
Trap Efficiency:
95.3
Filename: Grass Filter Gulch A.sc4 Printed 10-24-2018