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
('nnvrinht 1 QQR-9111n Pnmoln 1 Crhuinh
29
Bottom Left Right Freeboard Freeboard
Freeboard
Sideslope Sideslope Slope(%)
Width(ft) Ratio Ratio 1 Depth(ft) %of Depth Mult.x
(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: 33.75 cfs
Depth: 0.35 ft 1.35 ft
Top Width: 13.40 ft 17.40 ft
Velocity*:
X-Section Area: 4.46 sq ft
--- ----- --
Hydraulic Radius: 0.329 ft
Froude Number*:
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.
ti
Structure #27(Riprap Channel)
Last Cntr ditch to Prspct drainage
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 5.0 1.00
Riprap Channel Results:
Simons/OSM Method - Steep Slope Design
w/o Freeboard w/Freeboard
Design Discharge: 33.75 cfs
Depth: 0.35 ft 1.35 ft
Top Width: 13.40 ft 17.40 ft
-- --------
Velocity*:
X-Section Area: 4.46 sq ft
Hydraulic Radius: 0.329 ft
Filename: Prospect Pond 25 Yr 24 Hr Storm Event.sc4 Printed 01-06-2020