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2012-11-09_PERMIT FILE - C1996083A
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2012-11-09_PERMIT FILE - C1996083A
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Last modified
8/24/2016 5:10:27 PM
Creation date
11/20/2012 9:02:20 AM
Metadata
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Template:
DRMS Permit Index
Permit No
C1996083A
IBM Index Class Name
Permit File
Doc Date
11/9/2012
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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Spillway Pond F <br />Determine flow characteristics down 10.30A Grade <br />Pond F Emergency Spillway <br />Manning's.Equation <br />Flow In a Trapezoidal Channel <br />Depth <br />D <br />0.89 <br />Feet <br />Width <br />W <br />5 <br />Feet <br />Slope <br />S <br />0.103 <br />Express as Decimal <br />Mannings "N" <br />N <br />0.04 <br />Express as Decimal <br />Side Slope <br />X <br />2 <br />Slope = X:1 <br />AREA-- (W"DHVD^2r <br />WETTED PERIMETER= (W)+-2 "[((X "D)A2 +D "2) "0.5] <br />R= AREA/V&=D PERIMETER <br />V= (1.49/N)'(R^.667 r(S".5)= <br />Q =AXV= <br />Q REQUIRED - Peak Discharge <br />Sediment Pond F <br />Riprap Sizing - Down Face of Embankment - Pond F <br />D50 = Size of Mprap <br />D50 = ((V X SA. 17Y7.58)) ^2 <br />050 = Diameter in feet <br />V =Velocity <br />S = Slope <br />D50 = 0.68 feet <br />6.03 FEET ^2 <br />8.98 FEET <br />0.67 <br />9.17 FT/SEC <br />55.34 CFS <br />54.47 CFS <br />8 Inches Use W to 18" Rock <br />TR -72 App. B -6 02112 <br />
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