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

SEDCAD 4 for Windows
!`nn.,rin h4 100A 9n1n D-1� I Q,k--h
7
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)
2.00 1.0:1 7.0:1 3.0 D, B 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: 15.50 cfs 15.50 cfs
Depth: 0.86 ft 1.35 ft
Top Width: 8.85 ft 12.80 ft
Velocity: 3.34 fps 1.55 fps
X-Section Area: 4.64 sq ft 9.99 sq ft
Hydraulic Radius: 0.513 ft 0.761 ft
Froude Number: 0.81 0.31
Roughness 0.0495 0.1386
Coefficient:
Structure #Z il�Pond�
Section 16 Pond
Pond Inputs:
Initial Pool Elev: 7,746.00 ft
Initial Pool: 1.22 ac-ft
Perforated Riser
Riser Barrel Number of
Riser Height Barrel Barrel Slope Spillway Elev
Diameter (ft) Diameter Length (ft) (%) Manning's n (ft) Holes per
(in) (in) Elev
12.00 9.20 12.00 121.00 8.00 0.0250 7,752.90 2
Emergency Spillwax
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
7,754.50 17.00 2.00:1 2.00:1 19.00
Pond Results:
Peak Elevation: 7,751.43 ft
Dewater Time: 1.74 days
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table
Filename:Section 16 25 YR 24 HR Postmining Case.sc4 Printed 01-05-2021