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
7
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
Sideslope Sideslope Slope (%) Manning's n
Width (ft)
Depth:
Velocity (fps)
Ratio Ratio
Depth (ft) % 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 (Riprap Channel)
South Ditch (7+75 to 11 +00)
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Bottom Left Right
w/o Freeboard w/ Freeboard
Design Discharge:
6.64 cfs
Depth:
0.27 ft 1.27 ft
Top Width:
7.35 ft 12.35 ft
Velocity:
3.69 fps
X -Section Area:
1.80 sq ft
Hydraulic Radius:
0.241 ft
Froude Number:
1.31
Structure #6 (Riprap 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) 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 10YR EVENT_5.31.18.sc4 Printed 05-31-2018
Appendix 2.05.3(4)-8 Page 9 June 2018 JR -17)
w/o Freeboard w/ Freeboard
Design Discharge:
8.14 cfs
Depth:
0.19 ft 1.19 ft
Top Width:
12.75 ft 16.75 ft
Velocity:
3.51 fps
X -Section Area:
2.32 sq ft
Hydraulic Radius:
0.181 ft
Filename: Pond NHN-002 DESIGN 10YR EVENT_5.31.18.sc4 Printed 05-31-2018
Appendix 2.05.3(4)-8 Page 9 June 2018 JR -17)