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HYDRO22762
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HYDRO22762
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Entry Properties
Last modified
8/24/2016 8:43:46 PM
Creation date
11/20/2007 3:14:25 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981012
IBM Index Class Name
Hydrology
Doc Date
5/1/1985
Doc Name
RESPONSE TO NEW PR STIPULATIONS 4 7 8 AND STIPULATION 2 TR TO THE PR
From
WYOMING FUEL CO
To
MLRD
Permit Index Doc Type
OTHER SURFACE WATER
Media Type
D
Archive
No
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• Volume capacity for the as-built channel at the design flow depth is less than <br />7910 CFS (100 YR - 24 HR event), try d = 10.5 <br />d 10.5 FT <br />A = f4(l0.5)2(2.03) _!5(10.5)2(2.84) +(10.5)(21.0) <br />A = 488.96 FT2 <br />R = A/WP = 6.40 FT <br />V = 1.486/0.04 (6.15)2/3(0.0179) <br />V = 16.64 FPS <br />Q = VA =(16.64)(488.96) = 8136 CFS <br />The as-built channel flowline will be near 10.5 ft. Determine superelevation on <br />bends (200' radius) to see if rip-rap height is O.K. <br />superelevation = oY CV2W/gr <br />oY =(1.0)(16.64)2(72.14}/(32,2X200) <br />oY = 3.1 FT <br />Compare flowline height on curves with as-built rip-rap height. <br />• d+oY=10.5+3.1=13.6 FT <br />O.K. <br />As-Built Rip-Rap Sizing <br />Using as-built parameters calculate D5p rip-rap size. <br />Tractive Force on Channel Bottom <br />`lo = RS <br />To =(62.4)(6.4)(0.0178) = 7.11 PSF <br />`ro on 2.84 H: 1 V Side Slopes <br />~''1 To (1 - Sin20/Sin20)0.5 <br />?'1 = 7.i1(L - 0.11/0.413)0.5 = 6.09 PSF <br />D50 (Straight Section) _'1'1/0.04 (Ss -~ ) <br />= 6.09/0.04 (165 - 62.4) <br />• <br />
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