2021-04-05_PERMIT FILE - C1981019A ‎(17)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 4/5/2021
• Doc Name: Section 16 Pond Temporary and Permanent Channels
• Section_Exhibit Name: Exhibit 07 Item 14 Appendix Exh7-14S
• Media Type: D
• Archive: Yes

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Structure Detail:
Structure #6(Vegetated Channel
West Section 16 Ditch 45+00 to 63+57
Trapezoidal Vegetated Channel Inputs:
Material: Tall fescue
Bottom
Left Right Retardance Freeboard Freeboard Freeboard Limiting
Sideslope Sideslope Slope(%) Classes Mult. x Velocity
Width(ft) Ratio Ratio Depth (ft) %of Depth (VxD) (fps)
10.00 4.0:1 2.0:1 3.0 D, B 1.00 7.0
Vegetated Channel Results:
Stability Stability Capacity Capacity
Class D w/o Class D w/ Class B w/o Class B w/
Freeboard Freeboard Freeboard Freeboard
Design Discharge: 3.01 cfs 3.01 cfs
Depth: 0.25 ft 1.25 ft 0.55 ft 1.55 ft
Top Width: 11.51 ft 17.51 ft 13.29 ft 19.29 ft
Velocity: 1.11 fps 0.47 fps
X-Section Area: 2.71 sq ft 6.39 sq ft
Hydraulic Radius: 0.234 ft 0.475 ft
Froude Number: 0.40 0.12
Roughness 0.0880 0.3327
Coefficient:
Structure #5(Vegetated Channel
West Section 16 Ditch at 45+00
Trapezoidal Vegetated Channel Inputs:
Material: Tall fescue
Left Right Freeboard Limiting
9 Freeboard Freeboard g
Bottom Retardance
Sideslope Sideslope Slope(%) Classes Mult. x Velocity
Width(ft) Ratio Ratio Depth (ft) %of Depth (VxD) (fps)
2.00 1.0:1 7.0:1 3.0 D, B 7.0
Vegetated Channel Results:
Filename:Section 16 25 YR 24 HR Postmining Case.sc4 Printed 01-05-2021