2017-05-12_PERMIT FILE - C2010089A ‎(10)‎

• Permit No: C2010089A
• IBM Index Class Name: Permit File
• Doc Date: 5/12/2017
• Doc Name: Pond NHN-002 As-Built
• Section_Exhibit Name: Appendix 2.05.3‎(4)‎-10
• Media Type: D
• Archive: Yes

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Structure Detail;
Structure #1 (Culvert)
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:
Structure #2 [Pond)
Pond NHN-002
Pond Inputs:
Design Discharge = 2.00 cfs
Minimum pipe diameter: 1 - 12 inch pipe(s) required
Initial Pool Elev:
5,678.25 ft
Initial Pool:
5.09 ac -ft
*Sediment Storage:
1.84 ac -ft
Dead Space:
20.00%
*Sediment capacity based on A veraye Annual R of 20.0 for 3 year(s)
Emergency Spillway
Spillway Elev Crest Length Left Right Bottom
(ft) Sideslope Sideslope Width (ft)
5,683.00 30.00 3.60:1 3.20:1 8.10
Enhanced Perf. Riser
Riser Riser Height
Diameter (in)
Barrel Barrel Length Barrel SlopeSpillway
Diameter (in)
Elev Number of
Mannings n Holes per
(ft)
(ft) (%)
(ft)
Elev
18.00 3.90
18.00 40.00 1.00
0.0150 5,681.90 2
Pond Results:
Peak Elevation:
5,680.02 ft
H'graph Detention Time:
12.05 hrs
Pond Model:
CSTRS
Dewater Time:
2.92 days
Trap Efficiency:
85.20
A
Filename: Pond NHN-002 AS -BUILT 10YR EVENT_02.13.17.Sc4 Printed 02-13-2017
Appendix 2.05.3(4)-10 Page 10 February 2017 JR -15)