2018-04-02_PERMIT FILE - C1981019A ‎(20)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 4/2/2018
• Doc Name: Sediment Pond and Associated Modeling During Mining
• Section_Exhibit Name: Volume 18 Exhibit 7 Item 23 Part C
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
Design Discharge:
Velocity:
X -Section Area:
Hydraulic Radius:
Froude Number:
Roughness
Coefficient:
Structure #7 (Null1
Structure #6 (Pond
Sidehi/l Pond
Pond Inputs:
Stability
Stability Capacity
Class D w/o
Class D w/ Class B w/o
Freeboard
Freeboard
Freeboard
37.55 cfs
95.02%
37.55 cfs
-
0.44 ft
-
-
0.74 ft
-
21.76 ft
22.94 ft
4.09 fps
2.38 fps
9.19sgft
15.80sgft
0.418 ft0.678
- -
ft
Imo- -0.50
1.11
7,172.00 40.00 2.00:1
2.00:1 12.00
0.0495
0.1176
Capacity
Class B w/
Freeboard
Perforated Riser
Riser
Diameter (ft) Diameter Length (ft) (Barrel Number of
Riser Height ' Barrel Barrel Slope Spillway Elev
oda) Manning's n (ft) Holes per
(in) (in) Elev
18.00 13.00 18.00 125.00 4.00 0.0240 7,170.00 2
Pond Results:
Peak Elevation: 7,170.06 ft
Initial Pool Elev:
7,167.00 ft
Pond Model:
CSTRS
Initial Pool:
4.02 ac -ft
Trap Efficiency:
95.02%
*Sediment Storage:
0.00 ac -ft
Dead Space:
0.00%
*No sediment capacity defined
Emergency Spillway
Spillway Elev Crest Length Left
Right Bottom
(ft) Sideslope
Sideslope Width (ft)
7,172.00 40.00 2.00:1
2.00:1 12.00
Perforated Riser
Riser
Diameter (ft) Diameter Length (ft) (Barrel Number of
Riser Height ' Barrel Barrel Slope Spillway Elev
oda) Manning's n (ft) Holes per
(in) (in) Elev
18.00 13.00 18.00 125.00 4.00 0.0240 7,170.00 2
Pond Results:
Peak Elevation: 7,170.06 ft
H'graph Detention Time:
13.69 hrs
Pond Model:
CSTRS
Dewater Time:
1.83 days
Trap Efficiency:
95.02%
Dewatering time is calculated from peak stage to lowest spillway
Filename: West Side Temp Spoil Pile Model 10yr24hr.sc4 Printed 01-17-2018
Page Exh. 7-23C-22 Revision Date 1/19/18
Revision No.. TR -118