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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17
Bottom Left Right ' Freeboard Freeboard Freeboard
Width (ft) Sideslope Sideslope Slope(%) Mult.x
Ratio Ratio Depth(ft) %of Depth (VxD)
12.00 2.0:1 2.0:1 3.6 1.00
Riprap Channel Results:
Simons/OSM Method - Steep Slope Design
w/o Freeboard w/Freeboard
Design Discharge: 2.40 cfs
Depth: 0.07 ft 1.07 ft
Top Width: 12.29 ft 16.29 ft
Velocity*:
X-Section Area: 0.87 sq ft
Hydraulic Radius: 0.071 ft
Froude Number*:
Manning's n*:
Drain: 1.00 in
D50: 3.00 in
Dmax: 3.75 in
Velocity and Manning's n calculations may not apply for this method.
Structure #12 (Null)
Border subwsheds V and T
Structure #13(Riprap Channel)
E Pit Ditch Sta 33 to tank EP2
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Left Right Freeboard
Bottom Freeboard Freeboard
Sideslope Sideslope Slope(%)
Width(ft) Ratio Ratio Depth(ft) %of Depth Mult.x
(VxD)
12.00 2.0:1 2.0:1 5.4 1.00
Riprap Channel Results:
Simons/OSM Method - Steep Slope Design
w/o Freeboard w/Freeboard
Design Discharge: 30.47 cfs
Depth: 0.32 ft 1.32 ft
Top Width: 13.27 ft 17.27 ft
Filename: Prospect Pond 25 Yr 24 Hr Storm Event.sc4 Printed 01-06-2020