2015-09-09_PERMIT FILE - C1981019A ‎(10)‎

• Permit No: C1981019A
• IBM Index Class Name: Permit File
• Doc Date: 9/9/2015
• Doc Name: West Taylor Sedimentation Pond
• Section_Exhibit Name: Exhibit 07 Item 20 Part C -ST
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
12
Simons/OSM Method - Steep Slope Design
Velocity and Manning's n calculations may not apply for this method.
Structure #7 (Null)
Null
Structure #6 (Vegetated Channell
West Trib Reach 2 at Sta15
Trapezoidal Vegetated Channel Inputs:
Material: Smooth brome
Left Right Retardance
Bottom
w/o Freeboard w/ Freeboard
Design Discharge:
62.97 cfs
Depth:
0.50 ft
Top Width:
15.02 ft
Velocity*:
20.00 3.0:1 3.0:1 0.6 D, B
X -Section Area:
6.80 sq ft
Hydraulic Radius:
0.448 ft
Froude Number*:
X -Section Area:
Manning's n*:
44.86 sq ft
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 #7 (Null)
Null
Structure #6 (Vegetated Channell
West Trib Reach 2 at Sta15
Trapezoidal Vegetated Channel Inputs:
Material: Smooth brome
Left Right Retardance
Bottom
Freeboard Freeboard Freeboard
Limiting
Sideslope Sideslope Slope (%)
Width (ft) Ratio Ratio Classes
Mult. x
; Depth (ft) % of Depth
Velocity
(fps)
Depth:
(VxD)
1.77 ft
20.00 3.0:1 3.0:1 0.6 D, B
7.0
Vegetated Channel Results:
Filename: TR -105r WTayPond PMT 25 24NS.sc4 Printed 06-18-2015
Exh. 7-20C-72 Revision Date: 06/18/2015
Revision No.: TR -105
Stability Stability
Class D w/o Class D w/
Freeboard Freeboard
Capacity Capacity
Class B w/o Class B w/
Freeboard Freeboard
Design Discharge:
63.18 cfs
63.18 cfs
Depth:
1.10 ft
1.77 ft
Top Width:
26.58 ft
30.63 ft
Velocity:
2.48 fps
1.41 fps
X -Section Area:
25.52 sq ft
44.86 sq ft
Hydraulic Radius:
0.948 ft
1.438 ft
Froude Number:
0.45
0.21
Roughness Coefficient:
0.0449
0.1043
Filename: TR -105r WTayPond PMT 25 24NS.sc4 Printed 06-18-2015
Exh. 7-20C-72 Revision Date: 06/18/2015
Revision No.: TR -105