2016-08-24_PERMIT FILE - C1981008A ‎(4)‎

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 8/24/2016
• Doc Name: Collection/Diversion Ditches and Culverts Design Parameters
• Section_Exhibit Name: Section 2.05.3‎(3)‎ Attachment 2.05.3‎(3)‎-1
• Media Type: D
• Archive: Yes

2.2270 Acres
2. Frequency ........................yr = 25
3. Rainfall,P(24-hour).............. in = 2.404. Initial abstraction, la............ = 0.5641
5. Compute la/P....................... = 0.2350
6. Unit peak discharge, qu...... csm/in = 282.11
7. Runoff,Q.........................in = 0.7238
8. Pond & swap adjustment factor .... Fp = 0.87
9. Peak Discharge,gp...............cfs = 61.8188
Ditch C18 Upper Portion
Channel Type: Trapezoidal, Equal Side Slopes
Dimensions: Left Side Slope 2.00:1
Right Side Slope 2.00:1
Base Dimension: 7.00
Discharge: 47.00 cfs
Depth of Flow: 1.23 feet
Velocity: 4.05 fps
Channel Lining: GRASS
Freeboard: 0.30 feet
Ditch C18 Lower Portion
Channel Type: Trapezoidal, Equal Side Slopes
Dimensions: Left Side Slope 2.00:1
Right Side Slope 2.00:1
Base Dimension: 7.00
Wetted Perimeter: 13.39
Area of Wetted Cross Section:
Depth of Flow: 1.43 feet
Velocity: 4.39 fps
Channel Lining: GRASS
Freeboard: 0.30 feet
14.08Discharge: 61.79 cfs
Attachment 2.05.3(3)-1 Page 20 March 2016 (TR -70)