2017-05-12_PERMIT FILE - C2010089A ‎(18)‎

• Permit No: C2010089A
• IBM Index Class Name: Permit File
• Doc Date: 5/12/2017
• Doc Name: Pond NHN-001 As-Built
• Section_Exhibit Name: Appendix 2.05.3‎(4)‎-6
• Media Type: D
• Archive: Yes

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Structure Detail:
Structure #1 fCu/vert)
Pit Pumping
Culvert Inputs:
Max. Entrance
Length (ft) Slope (%) Manning's n Headwater Tailwater (ft) Loss Coef.
(ft) (Ke)
1,000.00 2.00 0.0140 1.00 0.00 0.90
Culvert Results:
Design Discharge = 2.00 cfs
Minimum pipe diameter: 1 - 12 inch pipe(s) required
Structure #2 (Pond)
Pond NHN-001
Pond Inputs:
Initial Pool Elev:
5,671.50 ft
Initial Pool:
4.45 ac -ft
*Sediment Storage:
1.10 ac -ft
Dead Space:
20.00%
*Sediment capacity based on A verage Annual R of 20.0 for 3 year(s)
Drop Inlet
Riser
Riser Height
Diameter (in)
Barrel
Barrel Length Barrel Slope
Diameter (in)
Spillway Elev
Mannings n
(ft)
(ft) (%)
(ft)
18.00 4.25
24.00 173.00 2.70
0.0240 5,675.50 2
Enhanced Perf. Riser
Riser
Diameter (in) Riser Height
Barrel
Diameter (in) Barrel Length Barrel Slope
Number of
Manning's n Spillway Elev Holes per
(ft)
(ft) (/°)
(ft) Elev
18.00 4.25
24.00 173.00 2.70
0.0240 5,675.50 2
Pond Results:
Peak Elevation:
5,674.27 ft
H'graph Detention Time:
12.22 hrs
Pond Model:
CSTRS
Dewater Time:
2.47 days
Trap Efficiency:
77.57%
R
Filename: Pond NHN-001 AS -BUILT 10YR EVENT_02.13.17.sc4 Printed 02-15-2017