2010-12-17_REVISION - C1981019 ‎(122)‎

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

•
SEDCAD 4 for Windows
r•—n M,l 4000 Ann? D—t. I C'I.—h
Structure Detail;
Structure #91Erodible Channel
D17a
Trapezoidal Erodible Channel Inputs:
Material: Cobbles and shingles
Left Right
Freeboard Freeboard Freeboard
Limiting
Bottom Sideslope Sideslope Slope ( %) Manning's n
Width (ft)
Mutt. 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
5.5
Erodible Channel Results:
Structure #S ( Riprap Channel)
D17b
Trapezoidal Riprap Channel Inputs:
Material: Riprap
17
Left Right
w/o Freeboard w/ Freeboard
Design Discharge:
11.03 cfs
Depth:
0.37 ft 0.67 ft
Top Width:
13.50 ft 14.70 ft
Velocity:
2.31 fps
X- Section Area:
4.77 sq ft
Hydraulic Radius:
0.349 it
Froude Number:
0.69
Structure #S ( Riprap Channel)
D17b
Trapezoidal Riprap Channel Inputs:
Material: Riprap
17
Left Right
Freeboard Freeboard Freeboard
Bottom
Width (ft) Sideslope Sideslope Slope ( %)
Depth (ft) % of Depth Mult. x
Ratio Ratio
(VxD)
12.00 2.0:1 2.0:1 0.8
0.30
Rlprap Channel Results:
PADER Method - Mild Slope Design
•
Filename: 25 -year Collom Ponds (Without Riser).so4
Printed 01 -20 -2009
Exh. 7- 23A -78 Revision Date: 12/15/10
Revision No.: PR -03
w/o Freeboard w/ Freeboard
Design Discharge:
24.40 cfs
Depth:
0.65 ft 0.95 ft
Top Width:
14.61 ft 15.81 it
Velocity:
2.81 fps
X- Section Area:
8.67 sq ft
Hydraulic Radius:
0.581 ft
Filename: 25 -year Collom Ponds (Without Riser).so4
Printed 01 -20 -2009
Exh. 7- 23A -78 Revision Date: 12/15/10
Revision No.: PR -03