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
!`n...M,hl 100Q.-M70""10 1 Q V,—h
23
w/o Freeboard w/ Freeboard
D50: 6.00 in
Dmax: 9.00 in
Structure #38 jCulvertl
0
Culvert Inputs:
Max, Tallwa Entrance
ter
Length (ft) Slope (%) Manning's n Headwater Loss Coef.
(ft) (ft) (Ke)
190.00 5.00 0.0240 5.00 0.00 0.90
Culvert Results:
Design Discharge = 71.54 cfs
Minimum pipe diameter: 1 - 42 inch pipe(s) required
Structure #37 (R/prw Channel)
D8
Triangular Riprap Channel Inputs:
Material: Riprap
Left Right
Freeboard Freeboard Freeboard
Sidesiope Sideslope Slope ( %)
Depth (ft) % of Depth Mutt. x
Ratio Ratio
(VxD)
2.0:1 2.0:1 0.3
0.30
Riprap Channel Results:
PADER Method - Mild Slope Design
Filename: 25- year_Collom_Ponds (Without Rlser).sc4
Printed 01 -20 -2009
Exh. 7- 23A -84 Revision Date: 12/15/10
Revision No.: PR -03
w/o Freeboard w/ Freeboard
Design Discharge:
71.54 cis
Depth:
3.13 ft 3.43 ft
Top width:
12.52 ft 13.72 ft
Velocity:
3.65 fps
X- Section Area:
19.61 sq ft
Hydraullc Radius:
1.400 It
Froude Number:
0.51
Manning's n:
0.0280
Dmin:
1.00 in
D50:
1.50 in
Dmax:
3.00 in
Filename: 25- year_Collom_Ponds (Without Rlser).sc4
Printed 01 -20 -2009
Exh. 7- 23A -84 Revision Date: 12/15/10
Revision No.: PR -03