2017-07-11_PERMIT FILE - C1981019

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 7/11/2017
• Section_Exhibit Name: Exhibit 07, Item 14 Collom In Pit Drilling Small Area Exemption Demonstrations
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
f —,—h} 1QQR _,)n111 Pamcln I Crh,u.h
J
Structure Detail;
Structure #1
Contributing Watershed
Structure #2 (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) (N -sq m) (ft) (ft) (%)
0.0054 6.0 0.86 0.15 0.700 692.0 10.0 27.0
Grass Filter Results:
Total Infiltration Volume:
0.0521 ac -ft
Filter Infiltration Rate:
0.0240 cfs
Peak Flow Depth:
0.046 in
Critical Prone Velocity:
0.7266 fps
Wedge Location:
0.00 ft
Sediment Depth in Zone D:
0.0231 in
Trap Efficiency:
97.1%
Structure #4 (Null
SEDCAD Input to Force Mode/ to Run
Filename: Printed 05-22-2017