2020-03-31_PERMIT FILE - C1981019A ‎(13)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 3/31/2020
• Doc Name: Prospect Sedimentation Pond
• Type & Sequence: TR136
• Section_Exhibit Name: Exhibit 07 Item 20 Part PP
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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36
Contour ditch below subwshd C
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Left Right Freeboard
Bottom Freeboard Freeboard
Width(ft) Sideslope Sideslope Slope(%) Depth(ft) %of Depth Mult.x
Ratio Ratio (VxD)
12.00 2.0:1 2.0:1 5.0 1.00
Riprap Channel Results:
Simons/OSM Method - Steep Slope Design
w/o Freeboard w/Freeboard
Design Discharge: 13.68 cfs
Depth: 0.18 ft 1.18 ft
Top Width: 12.72 ft 16.72 ft
Velocity*:
X-Section Area: 2.21 sq ft
Hydraulic Radius: 0.173 ft
Froude Number*:
Manning's n*:
Dmin: 1.00 in
D50: 3.00 in
Dmax: 3.75 in
Velocity and Manning's n calculations may not apply for this method.
Structure #26(Riprap Channel)
Jct contour ditches
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Left Right Freeboard
Bottom Freeboard Freeboard
Width(ft) Sideslope Sideslope Slope(%) Depth (ft) %of Depth Mult.x
Ratio Ratio (VxD)
12.00 2.0:1 2.0:1 5.0 1.00
Riprap Channel Results:
Simons/OSM Method - Steep Slope Design
w/o Freeboard w/Freeboard
uesign uiscnarge: 13.68 cts
Depth: 0.18 ft 1.18 ft
Filename. Prospect Pond 10 Yr 24 Hr Storm Event.sc4 Printed 01-06-2020