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Sedimentology Parameters ~I <br />• <br />SOIL ERODIRILITY FACTORS (R) <br />Areas with topsoil (undisturbed and reclaimed areas): <br />Map Unit Soii Name K Factor <br />7a, 7b Morapos (Savage) 0.34 <br />lla, llb Hesperus shallow - <br />variant <br />18a, 18b Coche[opa 0.25 <br />19 a, 19b, 19e Rhone 0.20 <br />24c, 24b, 24e He reEord Variant 0.21 <br />(Coberly) <br />Average K for areas with topsoil: 0.25 <br />Reference: Schroeder, 1986. <br />Areal extent of soils units are shown on map M29 of [he Trapper Mine permit <br />application. <br />Areas without topsoil (active mining area) <br />1 <br />~~ <br />Spoil particle size distribution: 217, sand <br />41% silt and very fine sand <br />37% clay <br />3.1Y, organic material <br />Structure 2 (Agnew, 1986) <br />- Permeability 3 (Agnew, 1986) <br />K Factor = 0.14 From Wischmeier nomograph, SCS, 1982, Figure 3, page 22. <br />CRF/jb <br />REVISED FEB 13 '87 <br />