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3 <br />KAISER STEEL CORPORATION <br />COLORADO COAL MINE COMPANY <br />COUNTY ROAD DRT CROSSING <br />DITCX AND RI PRAP 5I21NG <br />TABLE 1 (CONY) <br />RIP RAP SELECTION <br />CALCULATE MANN INGS N <br />D 50 = RIP RAP SIZE FT. <br />D50 = 0.5 <br /> <br />N = 0.035 <br />RECHECK DEPTH OF FLOP INPUT <br />d = DEPTH OF iLON FT. <br />b = CHANNEL BOTTdI YIDTX FT. 12 <br />0 = FLONRATE LFS 28 <br />5= SLOPE X 0.40X <br />SG = SPECI FIL GRAVI TT ROCK 2.65 <br /> <br />d = 0.92 <br />CHECK FOR STABILITY <br />T=Gds <br />T= TRACTIVE FORCE <br />G= 62.4 <br />d=LXANNEL FLOP DEPTH FT <br />s=SLOPE <br />T= 0.23 LBS/FT2 <br />NB=(21•T)/(G•(SG-1)•D50 <br />NB= 0.093 <br />ANGLE OF REPOSE RIP RAP FIGURE 3.14 BARFIELD, WARNER AND XMN, P 187 <br />AR =ANGLE OF REPOSE <br />AR 42 DEGREES <br />AC = ANGLE OF CHANNEL BOTTOM <br />FOR 0.40XSLOPE <br />AC= 0.23 DEGREES <br />PAGE 2 <br />