2008-12-11_PERMIT FILE - C1980007A ‎(33)‎

• Permit No: C1980007A
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2008
• Doc Name: 100 Year, 24 Hour Surface Water Control Plan
• Section_Exhibit Name: Exhibit 66 SG-1 Pond
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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47
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*Sediment capacity based on A verage Annual R of 20.0 for 3 year(s)
Perforated Riser
Riser
Riser Height Barrel
Barrel Barren Slope Number of
Spillway Elev
'
Diameter
(ft) Diameter
Length (ft) (/o) Manning
s n
Holes per
(ft)
(in) (in} Elev
6.00 9.00 6.00 180.00 2.00 0.0160 6,774.00 4
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
6,774.00 20.00 2.50:1 2.50:1 10.00
Pond Results:
Peak Elevation: 6,774.10 ft
H'graph Detention Time: 14.30 hrs
Pond Model: CSTRS
Dewater Time: 3.95 days
Trap Efficiency: 75.29
Dewatenng time is calculated from peak stage to lowest spillway
L.J
E
Elevation-Capacity-Discharge Table

Elevation Area

(ac) Capacity

(ac-ft) Discharge

(cfs) Dewater
Time
(hrs)
6,765.26 0.098 0.000 0.000 Top of Sed. Storage
6,765.50 0.106 0.025 0.000
6,766.00 0.122 0.082 0.000
6,766.50 0.140 0.147 0.000
6,766.73 0.150 0.181 0.000
6,767.00 0.162 0.223 0.000
6,767.50 0.185 0.309 0.000
6,768.00 0.210 0.408 0.000 Low hole SPW #1
6,768.50 0.236 0.520 0.074 18.16*
6,769.00 0.264 0.645 0.105 14.39*
6,769.28 0.280 0.721 0.119 7.75*
6,769.50 0.290 0.783 0.129 5.90*
6,770.00 0.320 0.936 0.223 8.28*
6,770.50 0.335 1.100 0.345 5.73*
6,771.00 0.350 1.271 0.416 5.45
6,771.50 0.370 1.451 0.548 4.55
6,772.00 0.390 1.640 0.630 3.90
6,772.50 0.410 1.840 0.700 3.65
Filename: SG-1.sc4
Printed 10-28-2008