2019-01-18_PERMIT FILE - C2010089

• Permit No: C2010089
• IBM Index Class Name: Permit File
• Doc Date: 1/18/2019
• Doc Name: Pond NHN-001 As-Built
• Section_Exhibit Name: Appendix 2.05.3‎(4)‎-6
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
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Structure Detail;
Structure #2 (Pond
Pond NHN-001
Pond Inputs:
Riser
Initial Pool Elev:
5,675.50 ft
Barrel Barrel SlopeSpillway Elev
Initial Pool:
6.22 ac -ft
*Sediment Storage:
1.94 ac -ft
Dead Space:
20.00%
*Sediment capacity based on A verage Annual R of 27.0 for 5 year(s)
Drop Inlet
72.00
Riser
Riser Height
Barrel
Barrel Barrel SlopeSpillway Elev
Diameter
(ft)
Diameter
Length (ft) (%) Manning's n (ft)
(in)
(in)
(in)
Elev
72.00
6.25
24.00
106.40 5.60 0.0240 5,676.50
Enhanced Perf. Riser
Riser
Riser Height
Barrel
Barrel Barrel Slope
Number of
Spillway Elev
Diameter (ft)
Diameter
Length (ft) (%)
Manning's n (ft) Holes per
(in)
(in)
(ac -ft)
Elev
18.00 4.75
24.00
173.00 2.70
0.0240 5,675.50 2
Pond Results:
Peak Elevation:
5,676.99 ft
H'graph Detention Time:
1.88 hrs
Pond Model:
CSTRS
Dewater Time:
Trap Efficiency:
1.16 days
73.28%
Dewatering time is calculated from peak stage to lowest spillway
Elevation -Capacity -Discharge Table
Filename: Pond NHN-001 AS -BUILT 25YR EVENT_12.18.18.sc4 Printed 12-18-2018
Appendix 2.05.3(4)-6 Page 26 December 2018 (TR -19)
Area
Capacity
Discharge Dewater
Elevation
Time
(ac)
(ac -ft)
(cfs) (hrs)
5,670.00
0.800
0.000
0.000 Top of Sed. Storage
5,670.00
0.800
0.001
0.000
5,670.25
0.824
0.204
0.000
5,670.50
0.849
0.413
0.000
Filename: Pond NHN-001 AS -BUILT 25YR EVENT_12.18.18.sc4 Printed 12-18-2018
Appendix 2.05.3(4)-6 Page 26 December 2018 (TR -19)