2018-07-24_PERMIT FILE - C2010089 ‎(5)‎

• Permit No: C2010089
• IBM Index Class Name: Permit File
• Doc Date: 7/24/2018
• Doc Name: Pond NHN-002 & Ditch Designs
• Section_Exhibit Name: Appendix 2.05.3‎(4)‎-9
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
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Structure #4 (Erodible Channel)
North Ditch (20+80 to 30+30)
Trapezoidal Erodible Channel Inputs:
Material: Excavated overburden (sandstone)
Bottom Left Right
w/o Freeboard w/ Freeboard
Froude Number:
1.45
Manning's n:
0.0430
Dmin:
1.00 in
D50:
1.50 in
Dmax:
3.00 in
Structure #4 (Erodible Channel)
North Ditch (20+80 to 30+30)
Trapezoidal Erodible Channel Inputs:
Material: Excavated overburden (sandstone)
Bottom Left Right
Freeboard Freeboard Freeboard
Limiting
Sideslope Sideslope Slope (%) Manning's n
Width (ft)
Depth:
Velocity (fps)
Ratio Ratio
Depth (ft) % of Depth Mult. x (VxD)
Velocity:
12.00 2.0:1 2.0:1 4.0 0.0350
1.00
5.0
Erodible Channel Results:
Structure #2 (Pond)
Pond NHN-002
Pond Inputs:
Initial Pool Elev:
w/o Freeboard w/ Freeboard
Design Discharge:
5.23 cfs
Depth:
0.17 ft 1.17 ft
Top Width:
12.67 ft 16.67 ft
Velocity:
2.53 fps
X -Section Area:
2.07 sq ft
Hydraulic Radius:
0.162 ft
Froude Number:
1.10
Initial Pool Elev:
5,678.25 ft
Initial Pool:
0.05 ac -ft
*Sediment Storage:
4.61 ac -ft
Dead Space:
20.00%
*Sediment capacity based on A verage Annual R of 27.0 for 8 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 8.00
0
Filename: Pond NHN-002 DESIGN 10YR EVENT_5.31.18.sc4 Printed 05-31-2018
Appendix 2.05.3(4)-8 Page 10 June 2018 JR -17)