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PERMFILE105841
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PERMFILE105841
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Entry Properties
Last modified
8/24/2016 9:58:42 PM
Creation date
11/24/2007 12:50:46 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981048
IBM Index Class Name
Permit File
Doc Date
12/11/2001
Section_Exhibit Name
EXHIBIT V-3
Media Type
D
Archive
No
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• Revised Ditch Des <br />1. Ditch: 22-D1 <br />2. Description: Diversion ditch to collect runoff around pit <br />3. Grade of Ditch: 7Z <br />4. Area Drained: 38 acres <br />5. Peak Discharge: 48(1.12)(1.25) = 67 cfs <br />6. Ditch Design <br /> *The peak discharge was assumed to be c orrect for the purposes <br /> of the revised ditch design. <br /> n = .030 <br /> Use ditch w/"V" walls 2:1 slope See chart 1031.2-2 ~ <br /> Calculations below <br /> From chart 2' FB DT D=1.31 A= 2D + 2Dz V = 11.1 fps <br /> = 2.62 = 3.43 <br /><• = 6.05 <br />* Depth for "V" DT w/2:1 S1 D = ~- <br />D = 6.05 <br />2 <br />* D = 1.74 feet deep <br />Add .5 foot freeboard <br />Total ditch depth = 2.24 feet <br />D = 1.74 <br /> <br />
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