2017-03-20_PERMIT FILE - C1981019A ‎(47)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 3/20/2017
• Doc Name: Sediment Control System for the Initial Facilities Disturbance Area
• Section_Exhibit Name: Volume 18 Exhibit 7 Item 23 Part J
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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Structure #46 (Null
Null above Coal Stockpile Pond
Null
Structure #45 (Pond
Coal Stockpile Pond
Pond Inputs:
Pond Results:
Initial Pool Elev:
Stability Stability
Class D w/o Class D w/
Freeboard Freeboard
Capacity Capacity
Class B w/o Class B w/
Freeboard Freeboard
Design Discharge:
33.10 cfs
33.10 cfs
Depth:
0.64 ft
1.04 ft
Top Width:
14.56 ft
16.18 ft
Velocity:
3.89 fps
2.25 fps
X -Section Area:
8.51 sq ft
14.71 sq ft
Hydraulic Radius:
0.573 ft
0.882 ft
Froude Number:
0.90
0.42
Roughness Coefficient:
0.0457
0.1054
Structure #46 (Null
Null above Coal Stockpile Pond
Null
Structure #45 (Pond
Coal Stockpile Pond
Pond Inputs:
Pond Results:
Initial Pool Elev:
7,211.00 ft
Initial Pool:
0.84 ac -ft
*Sediment Storage:
0.00 ac -ft
Dead Space:
20.00%
*No sediment capacity defined
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
7,214.00 20.00 3.00:1 3.00:1 20.00
Peak Elevation:
7,214.21 ft
H'graph Detention Time:
6.54 hrs
Pond Model:
CSTRS
Dewater Time:
0.65 days
Trap Efficiency:
100.00%
Dewatering time is calculated from peak stage to lowest spillway
Elevation -Capacity -Discharge Table
Filename. Eastside Initial Disturb ReducedStr 45 1024 022517.sc4
Exh. 7-23J-42
11
Printed 02-24-2017
Revision Date: 02/26/2017
Revision No.: TR -108