2009-09-04_PERMIT FILE - C1982056 ‎(4)‎

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 9/4/2009
• Doc Name: MAIN NORTH INTAKE SHAFT
• Section_Exhibit Name: Exhibit 08X 6-ain North Intake Shaft Drainage Designs
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
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Structure #3 Mona')
Sediment Pond
Pond Inputs:
Stability
Stability
Capacity Capacity
Dewater Time:
Class D w/o
Class D wl
Class B w/o Class B w/
Freeboard
Freeboard
Freeboard Freeboard
Velocity:
3.23 fps
0.00%
1.34 fps
X-Section Area:
1.44 sq ft
0.000
j 3.47 sq ft
Hydraulic Radius:
0.329 ft
0.011
0.510 ft
Froucle Number:
0.97
0.025
0.32
Roughness Coefficient:
0.0572
0.028
0.1845
Structure #3 Mona')
Sediment Pond
Pond Inputs:
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
6,734.20 3.00 2.00:1 2.00:1 12.00
Pond Results:
Peak Elevation:
H'graph Detention Time:
Initial Pool Elev:
6,734.20 ft
CSTRS
Dewater Time:
Initial Pool:
1.25 ac-ft
97.90%
*Sediment Storage:
0.00 ac-ft
(cfs)
Dead Space:
0.00%
(hrs)
* Sediment capacity based on Average Annual R of 10.0 for 3 year(s)
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
6,734.20 3.00 2.00:1 2.00:1 12.00
Pond Results:
Peak Elevation:
H'graph Detention Time:
6,734.50 ft
0.35 hrs
Pond Model:
CSTRS
Dewater Time:
0.55 days
Trap Efficiency:
97.90%
DewaterIng time Is calculated from peak stage to lowest spillway
Elevation - Capacity- Discharge Table
Filename: 10 yr 24 hr Perimeter Drainage Ditches.sc4 Printed 04-24-2009
Area
Capacity
Discharge Dewater
Elevation
Time
(ac)
(ac-ft)
(cfs)
(hrs)
6,730.55
0.027
0.000
0.000 Top of Sed. Storage
6,730.69
0.150
0.011
0.000
6,730.78
0.160
0.025
0.000
6,730.80
0.162
0.028
0.000
6,730.86
0.168
0.038
0.000
6,731.03
0.187
0.068
0.000
6,731.20
0.207
0.102
0.000
Filename: 10 yr 24 hr Perimeter Drainage Ditches.sc4 Printed 04-24-2009