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
('nnvnnhf 1QQR_9f 1f1 Pamwla I Crhuuah
35
w/o Freeboard w/Freeboard
Manning's n*:
Dmin: 2.00 in
D50: 6.00 in
Dmax: 7.50 in
Velocity and Manning's n calculations may not apply for this method.
Structure #9(Null)
Node jct N Trinb and E Pit Ditches
Structure #18(Riprap Channel)
Channel E Pit and N Trib to jct w contour
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Left Right Freeboard Freeboard Freeboard
Bottom Sideslope Sideslope Slope(%)
Width(ft) Ratio Ratio Depth(ft) %of Depth Mult, x
(VxD)
12.00 2.0:1 2.0:1 24.0 1.00
Riprap Channel Results:
Simons/OSM Method - Steep Slope Design
w/o Freeboard w/Freeboard
Design Discharge: 8.52 cfs
Depth: 0.05 ft 1.05 ft
Top Width: 12.21 ft 16.21 ft
Velocity*:
X-Section Area: 0.63 sq ft
Hydraulic Radius: 0.051 ft
Froude Number*:
Manning's n*:
Dmin: 3.00 in
D50: 9.00 in
Dmax: 11.25 in
Velocity and Manning's n calculations may not apply for this method.
Structure #24(Null)
Base of E Pit Ditch jct w contour ditch
Structure #25(Riprap Channel)
Filename: Prospect Pond 10 Yr 24 Hr Storm Event.sc4 Printed 01-06-2020