2010-12-17_REVISION - C1981019 ‎(128)‎

• Permit No: C1981019
• IBM Index Class Name: REVISION
• Doc Date: 12/17/2010
• Doc Name: Exhibit 7 Item 23 Erosion and Sedimentation Part 2
• Type & Sequence: PR3
• Email Name: JRS
• Media Type: D
• Archive: No

0
SEDCAD 4 for Windows
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Structure #7 (Riprap Channel)
D17c
Trapezoidal Riprap Channel Inputs:
Material: Riprap
•
Left Right
Bottom
w/o Freeboard w/ Freeboard
X- Section Area:
14.72 sq ft
Hydraulic Radius:
0.883 ft
Froude Number:
0.73
Manning's n:
0.0310
Dmin:
1.00 In
D50:
1.50 in
Dmax:
3.00 in
Structure #7 (Riprap Channel)
D17c
Trapezoidal Riprap Channel Inputs:
Material: Riprap
•
Left Right
Bottom
Freeboard Freeboard Freeboard
Sideslope Sideslope Slope ( %)
Width (ft)
�
Depth (ft) /o of Depth ( x
Ratio Ratio
(VxD)
12.00 2.0 :1 2.0:1 8.6
0.30
Riprap Channel Results:
PADER Method - Steep Slope Design
Structure #6 (Erodible Channel)
NOb
20
Trapezoidal Erodible Channel Inputs:
0 Material: Cobbles and shingles
Filename: 100- year_Collom_Ponds (With Riser).sc4 Printed 01- 22.2009
Exh. 7 -23A -138 Revision Date: 12/15/10
Revision No.: PR -03
w/o Freeboard w/ Freeboard
Design Discharge:
92.65 cfs
Depth:
0.92 R 1.22 ft
Top Width:
15.67 ft 16.87 ft
Velocity:
7.31 fps
X- Seaton Area:
12.68 sq ft
Hydraulic Radius:
0.788 ft
Froude Number:
1.43
Manning's n:
0.0510
Dmin:
3.00 In
D50:
6.00 in
Dmax:
9.00 In
Structure #6 (Erodible Channel)
NOb
20
Trapezoidal Erodible Channel Inputs:
0 Material: Cobbles and shingles
Filename: 100- year_Collom_Ponds (With Riser).sc4 Printed 01- 22.2009
Exh. 7 -23A -138 Revision Date: 12/15/10
Revision No.: PR -03