Laserfiche WebLink
r 1 <br />~J <br />Exhibit I S - Pand <br />TABLE 7 <br />LORENCITO CANYON MINE <br />COMPOSITE TEXTURES FOR THE ERODIBLE FRACTION OF <br />SOIL SERIES AND ASSOCIATIONS AT LORENCITO <br />Passing, Soil Association of Series <br />Textural Size <br />Fraction (mm) Shawa/Marvlliav/ <br />FDV/SR Loam Trag/1.RT Sandy <br />Loam Fughes <br />Cla LST Silry <br />Cla Loam <br />2 l00 100 100 100 <br />1 75 70 99.5 99 <br />0.5 64 67 99 98 <br />0.25 60 58 97 97 <br />0.125 53 52 95 95 <br />0.063 44 38 91 92 <br />0.016 30 21 78 71 <br />0.004 17 11 69 47 <br />Source: SCS, 1986. <br />The length parameter, L, within the RUSLE equation reflects the length of overland flow within a <br />watershed. Overland flow occurs for a short distance at the top of a watershed and is followed by <br />channel flow unless there is a reduction in slope and deposition occurs. Length parameters are based <br />• on best professional judgment after examining the slopes in each individual subwatershed. <br />Maximum lengths of overland flow have been applied in the modeling per Table 8. <br />TABLE 8 <br />LORENCITO CANYON MINE <br />OVERLAND FLOW LENGTH FACTORS USED IN RUSLE ANALYSIS <br />Slo a Ran e % Maximum Len th feet <br />0 - 5 Actual Distance <br />5 - 10 225 <br />] 0 - 20 175 <br />20 - 30 125 <br />>30 l00 <br /> <br />6 (revised 4/20/01) <br />