2017-07-18_PERMIT FILE - C1981019A ‎(2)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 7/18/2017
• Doc Name: Sediment Control for Initial Disturbance Coal Stockpile Pond Using Total Containment
• Section_Exhibit Name: Volume 18 Exhibit 7, Item 23 Part M
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
+000 )non o—i., i c. h,.—K
Structure Detail:
Structure #47 (Vegetated Channel)
Ditch to Coal Stockpile Pond
Trapezoidal Vegetated Channel Inputs:
Material: Smooth brome
Left Right
Bottom Retardance
Freeboard Freeboard Freeboard
Limiting
Sideslope Sideslope Slope (%)
Width (ft) Ratio Ratio Classes
Depth (ft) % of Depth Mult. x (VxD)
Velocity
(fps)
12.00 2.0:1 2.0:1 3.0 D, B
0.77 ft
7.0
Vegetated Channel Results:
Structure #46 (Null,]
Null above Coal Stockpile Pond
Null
Structure #44 (Null)
Addition from the western area
Structure #45 (Pond)
Coal Stockpile Pond
Pond Inputs:
Initial Pool Elev: 7,212.40 ft
Initial Pool: 2.12 ac-ft
Emergency Spillway
V
Filename: Initial Disturb JustCoalPond 2524v4.sc4 Printed 05-09-2017
Exh. 7-23M-47 Revision Date: 5/18/2017
A—,; o;— ATS. • TA_1 1 1
Stability Stability
Class D w/o Class D w/
Freeboard Freeboard
Capacity Capacity
Class B w/o Class B w/
Freeboard Freeboard
Design Discharge:
50.93 cfs
50.93 cfs
Depth:
0.77 ft
1.19 ft
Top Width:
15.08 ft
16.75 ft
Velocity:
4.89 fps
2.98 fps
X -Section Area:
10.41 sq ft
17.08 sq ft
Hydraulic Radius:
0.674 ft
0.986 ft
Froude Number:
1.04
0.52
Roughness Coefficient:
0.0405
0.0857
Structure #46 (Null,]
Null above Coal Stockpile Pond
Null
Structure #44 (Null)
Addition from the western area
Structure #45 (Pond)
Coal Stockpile Pond
Pond Inputs:
Initial Pool Elev: 7,212.40 ft
Initial Pool: 2.12 ac-ft
Emergency Spillway
V
Filename: Initial Disturb JustCoalPond 2524v4.sc4 Printed 05-09-2017
Exh. 7-23M-47 Revision Date: 5/18/2017
A—,; o;— ATS. • TA_1 1 1