2020-08-07_PERMIT FILE - C1981010A (4)

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