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

SEDCAD 4 for Windows
rl —inh! 1ou -7nn7 P—i. l Qrhwah
Structure Detail;
Structure #9 (Erodible Channel)
D17a
Trapezoidal Erodible Channel Inputs:
Material: Cobbles and shingles
Bottom Left Right
Freeboard Freeboard Freeboard
Limiting
Sideslope Sideslope Slope (%) Manning's n
Width (ft)
Mult. x
Depth (ft) % of Depth
Velocity
(fps)
Ratio Ratio
(VxD)
Velocity:
12.00 2.0:1 2.0:1 1.2 0.0350
0.30
515
Erodible Channel Results:
•
Material: Riprap
19
Left Right
Bottom
Freeboard Freeboard Freeboard
Sideslope Sideslope Slope (%)
Width (ft)
Mult. x
Depth (ft) % of Depth
Ratio Ratio
(VxD)
12.00 2.0:1 2.0:1 0.8
0.30
Riprap Channel Results:
PADER Method - Mild Slope Design
•
Structure #8 N1 rao Channel)
D17b
Trapezoidal Riprap Channel Inputs:
w/o Freeboard w/ Freeboard
Design Discharge:
26.39 cis
Depth:
0.63 ft 0.93 It
Top Width:
14.51 ft 15.71 ft
Velocity:
3.17 fps
X- Section Area:
8.31 sq ft
Hydraulic Radius:
0.562 ft
Froude Number:
0.74
Structure #8 N1 rao Channel)
D17b
Trapezoidal Riprap Channel Inputs:
Filename: 100 -year Collom_Ponds (With Riser) =4
Printed 01 -22 -2009
Exh. 7 -23A -137 Revision Date: 12/15/10
Revision No.: PR -03
w/o Freeboard w/ Freeboard
Design Discharge:
58.27 cfs
Depth:
1.05 ft 1.35 ft
Top Width:
16.18 ft 17.38 ft
Velocity:
3.96 fps
Filename: 100 -year Collom_Ponds (With Riser) =4
Printed 01 -22 -2009
Exh. 7 -23A -137 Revision Date: 12/15/10
Revision No.: PR -03