2009-09-04_PERMIT FILE - C1982056 ‎(4)‎

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 9/4/2009
• Doc Name: MAIN NORTH INTAKE SHAFT
• Section_Exhibit Name: Exhibit 08X 6-ain North Intake Shaft Drainage Designs
• Media Type: D
• Archive: No

SEDCAD 4 for Windows
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Structure Detail;
Structure #2 ,(Erodible Channel
Perimeter Drainage Ditch 2
Triangular Erodible Channel Inputs:
Material: Cobbles and shingles
Left
Right Freeboard Freeboard Freeboard
I Limiting
Sideslope
Sideslope Slope ( %) Manning's n Mult. x
Velocity
Ratio
Ratio i Depth (ft) % of Depth (VxD)
(fps)
3.0:1
3.0:1 6.6 0.03501
0.30
5.0
0
Erodible Channel Results:
Structure #1 (Erodible Channel
Perimeter Drainage Ditch 1
Triangular Erodible Channel Inputs:
Material: Cobbles and shingles
Left Right Freeboard Freeboard Freeboard
w/o Freeboard w/ Freeboard
Design Discharge:
0.37 cfs
Depth:
- - --- ---- -
0.22 ft 0.52 ft
Top Width:
- -_ —. __ - —
1.34 ft 3.14 ft
Velocity
- -- - - -- - - - -- -----_.-------- --
2.45 fps
X- Sect ion Area
0.15 sq ft
Hy draulic Radius:
0.106 ft
Froude Number:
1.29
Structure #1 (Erodible Channel
Perimeter Drainage Ditch 1
Triangular Erodible Channel Inputs:
Material: Cobbles and shingles
Left Right Freeboard Freeboard Freeboard
Limiting
Sideslope Sideslope Slope ( %) Manning's n Mult. x
Velocity
Ratio Ratio I Depth (ft) % of Depth (VxD)
(fps)
3.0:1 3.0:1 6.8 0.0350 0.30 5.0
Froude Number: 1.54
Filename: 10 yr 24 hr Empty—Erodible Perimeter Drainage Ditches.sc4
Erodible Channel Results:
7
Printed 04 -24 -2009
w/o Freeboard w/ Freeboard
Design Discharge:
Depth:
4.82 efs
0.58 ft 0.88 ft
Top Width:
3. 50 ft 5.30 ft
Velocity:
X- Section Area:
4.71 fps
1. sq ft
Hydraulic Radius:
0.2 ft
7
Printed 04 -24 -2009