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
r—.,i.h1100A -9M7 P —fa 1 Arh—h
w/o Freeboard w/ Freeboard
Manning's n:
0.0480
Dmin:
7.00 In
D50:
12.00 In
Dmax:
18.00 In
•
Structure #21 (Erodible Channe /1
D10
Trapezoidal Erodible Channel Inputs:
Mate rial' Cobbles and shingles
34
Left Right
Freeboard Freeboard Freeboard
Limiting
Bottom Sideslope S[delope Slope ( %) Manning's n
Width (ft)
Muit x
Depth (ft) % of Depth .
Velocity
(fps)
Ratio Ratio
)
NZ)
Velocity:
12.00 2.0 :1 2.0:1 6.0 0.0350
0.30
5.5
Erodible Channel Results:
Structure #20 [Erodible Chanel)
D11a
Triangular Erodible Channel Inputs:
Material: Cobbles and shingles
Left Right
w/o Freeboard w/ Freeboard
Design Discharge:
34.90 cfs
Depth:
0.46 ft 0.76 ft
Top Width:
13.84 ft 15.04 ft
Velocity:
5.87 fps
X Section Area:
5.94 sq ft
Hydraulic Radius:
0.423 ft
Froude Number:
1.58
Structure #20 [Erodible Chanel)
D11a
Triangular Erodible Channel Inputs:
Material: Cobbles and shingles
Left Right
Freeboard Freeboard Freeboard
Limiting
Sideslope Sideslope Slope ( %) Manning's n
Depth (ft) % of Depth Mult. x
Velocity
(fps)
Ratio Ratio
(VxD)
2.0:1 2.0:1 3.2 0.0350
0.30
5.5
Erodible Channel Results:
w/o Freeboard w/ Freeboard
• i Design Discharge. 20.13 cis
Depth: 1.36 ft 1.66 ft
Filename: 100 -year Col[om_Ponds (With Riser).sc4 Printed 01 -22 -2009
Exh. 7 -23A -152 Revision Date: 12/15/10
Revision No.: PR -03