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

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Structure #4 ffilvdible
Spillway Channel
Trapezoidal Erodible Channel Inputs:
Material: Cobbles and shingles
I
Bottom Left Right 1 Freeboard Freeboard Freeboard
Limiting
Combined
Elevation
Emergency
Total
(ft)
Spillway (cfs)
Discharge
2.03 fps
X- Section Area:
(cfs)
6,735.69
68.576
68.576
1 6,735.69
68.576
68.5761
Structure #4 ffilvdible
Spillway Channel
Trapezoidal Erodible Channel Inputs:
Material: Cobbles and shingles
I
Bottom Left Right 1 Freeboard Freeboard Freeboard
Limiting
Width (ft) Sideslope Sideslope Slope (%) Manning's n I Mult. x
Velocity
Ratio Ratio i Depth (ft) % of Depth (VxD)
(fps)
12.00 2.0:1 2.0:1 2.0 0.0350 � 0.30
5.0
Erodible Channel Results:
•
•
Filename: 10 yr 24 hr Perimeter Drainage Ditches.sc4
Printed 04-24-2009
w/o Freeboard w/ Freeboard
Design Discharge:
5.11 cfs
Depth:
0.20 ft 0.50 ft
Top Width:
12.81 ft 14.01 ft
--
Velocity:
2.03 fps
X- Section Area:
2.52 sq ft
Hydraulic Radius:
0.195 ft
Froude Number:
0.81
Filename: 10 yr 24 hr Perimeter Drainage Ditches.sc4
Printed 04-24-2009