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 Detail;
Structure #7 (Erodible Channel)
South Ditch (0+00 to 7+75)
Trapezoidal Erodible Channel Inputs:
Material: Excavated overburden (sandstone)
Bottom Left Right
Freeboard Freeboard Freeboard
Limiting
Width (ft) Sideslope Sideslope Slope (%) Manning's n
Depth:
Velocity (fps)
Ratio Ratio
o
Depth (ft) /o of Depth Mult. x (VxD)
Velocity:
6.00 2.0:1 3.0:1 5.0 0.0350
1.00
5.0
Erodible Channel Results:
Structure #6 (R/prap Channel)
South Ditch (7+75 to 11 +00)
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Bottom Left Right
w/o Freeboard w/ Freeboard
Design Discharge:
9.08 cfs
Depth:
0.32 ft 1.32 ft
Top Width:
7.62 ft 12.62 ft
Velocity:
4.12 fps
X -Section Area:
2.20 sq ft
Hydraulic Radius:
0.285 ft
Froude Number:
1.35
Structure #6 (R/prap Channel)
South Ditch (7+75 to 11 +00)
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Bottom Left Right
Freeboard Freeboard Freeboard
Sideslope Sideslope Slope (%)
Width ( ft)
11.17 cfs
Ratio Ratio
Depth (ft) % of Depth Mult. x (VxD)
12.00 2.0:1 2.0:1 10.0
1.00
Riprap Channel Results:
PADER Method - Steep Slope Design
Filename: Pond NHN-002 DESIGN 25YR EVENT_5.31.18.sc4 Printed 05-31-2018
Appendix 2.05.3(4)-8 Page 22 June 2018 JR -l7)
w/o Freeboard w/ Freeboard
Design Discharge:
11.17 cfs
Depth:
0.22 ft 1.22 ft
Top Width:
12.88 ft 16.88 ft
Velocity:
4.07 fps
X -Section Area:
2.74 sq ft
Hydraulic Radius:
0.211 ft
Filename: Pond NHN-002 DESIGN 25YR EVENT_5.31.18.sc4 Printed 05-31-2018
Appendix 2.05.3(4)-8 Page 22 June 2018 JR -l7)