2018-05-18_PERMIT FILE - C1981019A ‎(8)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 5/18/2018
• Doc Name: Collom in Pit Drilling Small Area Exemption Demonstrations
• Section_Exhibit Name: Volume 18 Exhibit 7 Item 25A
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
r' --ht 1 OQA -9!N f1 P-1. 1 Crhwoh
Structure Detail;
Structure #1
Undisturbed 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) (ft) (ft) (%)
(N -sq m)
0.0054 6.0 0.86 0.15 20.000 150.0 30.0 5.0
Grass Filter Results:
Total Infiltration Volume:
0.0169 ac -ft
Filter Infiltration Rate:
0.0156 cfs
Peak Flow Depth:
0.165 in
Critical Prone Velocity:
1.0367 fps
Wedge Location:
2.06 ft
Sediment Depth in Zone D:
0.0192 in
Trap Efficiency:
79.1%
Structure #3 (Null)
5EDG4D Input
6
Filename: Drill Pad SAE.sc4 Printed 05-04-2018