2017-03-20_PERMIT FILE - C1981019

• Permit No: C1981019
• IBM Index Class Name: Permit File
• Doc Date: 3/20/2017
• Doc Name: Sediment Control System for the Temporary Facilities Pond
• Section_Exhibit Name: Volume 18 Exhibit 7 Item 23 Part K
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
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7
Structure #2 (Pond
Laydown 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
X -Section Area:
2.73 sq ft
6.18 sq ft
Hydraulic Radius:
0.523 ft
0.786 ft
Froude Number:
0.63
0.23
Roughness Coefficient:
0.0522
0.1550
Structure #2 (Pond
Laydown Pond
Pond Inputs:
Pond Results:
Initial Pool Elev:
6,404.05 ft
Initial Pool:
0.87 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)
6,408.00 20.00 3.00:1 3.00:1 12.00
Peak Elevation:
6,408.09 ft
H'graph Detention Time:
2.96 hrs
Pond Model:
CSTRS
Dewater Time:
0.53 days
Trap Efficiency:
100.00 %
Dewatering time is calculated from peak stage to lowest spillway
Elevation -Capacity -Discharge Table
Elevation
Area
(ac)
Capacity
(ac -ft)
Discharge Dewater
Time
(cfs) (hrs)
6,400.00
0.160
0.000
0.000 Top of Sed. Storage
6,401.00
0.190
0.175
0.000
6,402.00
0.210
0.375
0.000
6,403.00
0.240
0.600
0.000
6,404.00
0.270
0.854
0.000
6,404.05
0.272
0.868
0.000
6,404.10
0.274
0.882
0.000
6,404.20
0.278
0.909
0.000
Filename: TempFacilities 2524.sc4 Printed 01-03-2017
Revision No.: TR -108 Exh. 7-23K-23 Revision Date: 1/03/2017