2016-10-28_PERMIT FILE - C2010089A ‎(8)‎

• Permit No: C2010089A
• IBM Index Class Name: PERMIT FILE
• Doc Date: 10/28/2016
• Doc Name: SEDCAD Design Report
• Section_Exhibit Name: Appendix 2.05.3‎(4)‎-2
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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Structure #2 (Pond
Pond NHN-003
Pond Inputs:
Structure Detail;
Initial Pool Elev:
5,686.00 ft
Initial Pool:
0.03 ac -ft
*Sediment Storage:
0.85 ac -ft
Dead Space:
20.00%
*Sediment capacity based on Average Annual R of 20.0 for 2 year(s)
Emergency Spillwax
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
5,693.50 18.00 2.00:1 2.00:1 10.00
Enhanced Perf. Riser
Riser
Riser Height
Diameter (in)
Barrel
Barrel Length Barrel Slope
Diameter (in)
Number of
Spillway Elev
Mannings n Holes per
(ft)
(ft) (%)
(ft)
Elev
180.00 5.50
18.00 100.00 2.00
0.0150 5,691.00 2
Pond Results:
Peak Elevation:
5,690.04 ft
H'graph Detention Time:
16.17 hrs
Pond Model:
CSTRS
Dewater Time:
3.66 days
Trap Efficiency:
81.47%
Dewatering time is calculated from peak stage to lowest spillway
Elevation -Capacity -Discharge Table
Elevation
Area
(ac)
Capacity
(ac -ft)
Discharge
(cfs)
Dewater
Time
(hm)
5,685.97
0.948
0.000
0.000
Top of Sed. Storage
5,686.00
0.953
0.030
0.000
Low hole SPW #2
5,686.50
0.980
0.513
0.294
19.87*
5,687.00
1.007
1.010
0.450
13.37*
5,687.50
1.035
1.521
0.564
10.96*
5,688.00
1.064
2.045
0.658
9.65*
Filename: Pond NHN-003 DESIGN 10YR EVENT PRINCIPAL SPILLWAY OPEN.sc4 Printed 03-25-2016