2009-09-21_PERMIT FILE - C1980007A ‎(7)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 9/21/2009
• Doc Name: 10-Year Surface Water Control Plan
• Section_Exhibit Name: Exhibit 66 Pond MB-3
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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23
• Pond Inputs:
Initial Pool Elev: 6,058.10 ft
Initial Pool: 0.74 ac-ft
*Sediment Storage: 0.01 ac-ft
Dead Space: 20.00%
*Sediment capacity based on Average Annual R of 30.0 for 3 year(s)
Straight Pipe
Barrel Barrel Entrance Tailwater
Barrel Manning's Spillway
Diameter Length Loss Depth
Slope (%) n Elev (ft)
(in) (ft) Coefficient (ft)
6.00 185.00 10.27 0.0140 6,058.10 0.70 0.00
Emergency Spillway
Pond Results:
•
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
6,064.50 10.00 1.00:1 1.00:1 8.00
Peak Elevation: 6,059.21 ft
Kgraph Detention Time: 3.37 hrs
Pond Model: CSTRS
Dewater Time: 0.95 days
Trap Efficiency: 90.85
Dewatering time is calculated from peak stage to lowest spillway
Elevation-Capacity-Discharge Table
•

Elevation Area

(ac) Capacity

(ac-ft) Discharge

(cfs) Dewater
Time
(hrs)
6,053.19 0.100 0.000 0.000 Top of Sed. Storage
6,053.60 0.109 0.043 0.000
6,054.10 0.120 0.100 0.000
6,054.60 0.130 0.163 0.000
6,055.10 0.140 0.230 0.000
6,055.60 0.150 0.303 0.000
6,056.10 0.160 0.380 0.000
6,056.60 0.170 0.462 0.000
6,057.10 0.180 0.550 0.000
6,057.60 0.190 0.642 0.000
6,058.10 0.200 0.740 0.000 Spillway #1
6,058.60 0.210 0.842 0.375 17.00
Filename: MB-3.sc4 Printed 08-11-2009