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2013-01-14_PERMIT FILE - C1996083A (11)
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2013-01-14_PERMIT FILE - C1996083A (11)
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Last modified
8/24/2016 5:12:03 PM
Creation date
2/1/2013 10:10:29 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1996083A
IBM Index Class Name
Permit File
Doc Date
1/14/2013
Doc Name
Appendix A through Appendix C
Section_Exhibit Name
Volume IX Coal Mine Waste Disposal Area No. 2
Media Type
D
Archive
Yes
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Ditch 7a <br />Manning's Equation <br />Flow In a Triangular Channel <br />Depth D 1.1 <br />Feet <br />Width W 0 <br />Feet <br />Slope S 0.33 <br />Express as Decimal <br />Mannings "N" N 0.04 <br />Express as Decimal <br />Side Slope X 2 <br />Slope = X:1 <br />AREA= (W *D) +(X *D ^2)= <br />2.51 FEET "2 <br />WETTED PERIMETER= (W) +2 *[((X *D) "2 +D ^2) ^0.5] 5.01 FEET <br />R= AREA/WETTED PERIMETER <br />0.50 <br />1.49/N) *(R ".667) *(S ^.5) = <br />IQ REQUIRED - Peak Discharge <br />IRiprap Sizing - Ditch 7a <br />D50 = Size of Riprap <br />D50 = ((V X S ^.17)/7.58)) ^2 <br />D50 = Diameter in feet <br />V = Velocity <br />S = Slope <br />D50 = 2.17 feet <br />13.50 FT /SEC <br />33.86 CFS <br />33.44 CFS <br />26 inches Use 24" Rock <br />TR -76 App. B -24 12/12 <br />
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