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Areas, other than advancing pits, must have topsoil removed due to surface <br />dis- <br /> turbances. Topsoil from these areas is removed and stockpiled. <br />3.2.2 Storage <br />When it becomes impractical to promptly redistribute material removed under Sec- <br />tion 3.2.1, such material must be stockpiled. The major reason for stockpiling <br />topsoil at Trapper Mine is the relation between the timing of the topsoil salvage <br />season and the advancement of pits and active regraded areas. Because of weather <br />constraints, topsoil operations are usually conducted about six months per year, <br />generally May through October. During this time, topsoil is removed from areas <br />that may not be regraded for several years. Therefore, there is sometimes more <br />topsoil removed than can be replaced since replacement areas have not yet been <br />mined or regraded. <br />When topsoil is removed for a road, dam, storage area or similar disturbance, it <br />• may be stockpiled near the disturbance for replacement once the area has been <br />reclaimed. <br />Topsoil stockpiles are selectively located on stable areas within the permit area <br />that are protected from wind and water erosion, future disturbance and contami- <br />nants that could lessen the capability of the materials to support vegetation <br />when redistributed. Sites are usually on relatively level areas, free of brush <br />and rock, and away from the bottom of drainages. Section 4.9.2 should be con- <br />sulted for clarification on placement of topsoil stockpiles. <br />After the material is stockpiled, the stockpiles are graded to 3h:ly or lesser <br />slopes to prevent erosion, then seeded with grasses as described in Section 4.9. <br />• <br />3-20 <br />REVISED FEB 13 '87