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Doc Date:1 211 112 0 01 <br />APPENDIX 2.05.3-SC <br />• RIPRAP CALCULATIONS - 10-YEAR, 24-HOUR STORM EVENT <br />SUN COAL COMPANY - MEADOWS N0. 1 <br />ROUTT COUNTY, COLORADO <br />Riprap - Culvert No. 2 <br />Yt = 17 ,11 <br />o T3 <br />• <br />Q = 06 ,03 <br />D1.5 ~4 <br />Channel riprap length for distance 30 or 4.5 feet D50 = 9" <br />Da = pipe diameter in feet <br />S =slope (feet/foot) <br />Yt = tailwater depth in feet <br />Q =peak discharge <br />Reference, Wright-McLaughlin Engineers, 1969 <br />Riprap - Culvert No. 3 <br />Da = 1.5 feet Q = .41 <br />Yt = .29 = ,19 <br />>t T3 <br /> <br />Q/D1.5 = 41 = .22 <br />T~ S4 <br />Use Type L for distance 30 or 4.5 feet D50 = 9~~ <br />Reference, Wright-McLaughlin, 1969 <br />Riprap - Culvert No. 4 <br />CMP Diameter = 1.5 feet <br />YT = 29 .19 <br />~ T3 <br />n = .024 S = .05 Q = .03 <br />Q = 03 .02 <br />p1.5 ~~2 <br />Use Type L D50 ' 9~~ <br />Riprap length = 3D = 3 x 1.5 = 4.5 feet <br /> ~ <br />III II III I'l llll ll~ <br /> <br />- 243 - (Rev. 5/86) <br />