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7.0 New Horizon 2 Mine Topsoil Management Plan <br />This section has been revised for TR -57 in 2008 and PR -06 in 2009, which addresses the <br />topsoil replacement for the whole permit area, including the change in handling procedures due <br />to the determination of prime farmland soils in the southwestern portion of the permit in early <br />2008. <br />The New Horizon 2 Mine topsoil management plan, based upon the detailed soil survey <br />contained in Section 2.04.9, was developed to insure that the most suitable topsoil within the <br />disturbance area is salvaged. The management plan evaluates the topsoil resources and <br />describes salvage depths and techniques, storage, redistribution, and maintenance or testing <br />procedures necessary to restore the disturbed areas to the desired postmine land use. <br />8.0 Evaluation of Topsoil Resources <br />The soils found in the New Horizon 2 Mine permit area are typical of soils found in the semi -arid <br />Colorado Plateau Physiographic Province, Canyon Land Section. The soils within the New <br />Horizon 2 Mine disturbance area prior to mining consist of irrigated cropland, irrigated <br />pastureland (which included hayland), rangeland, or wildlife habitat. Irrigated pasture soils are <br />predominantly moderately deep (20 to 40 inches) to deep (40 to 60 inches) and have developed <br />in local eolian, alluvial and slopewash colluvial materials. Most of the hayland soils are Ustollic <br />Haplargids, Ustic Calciargids, Ustic Haplocalcids or Ustic Haplocambids. The rangeland soils <br />are typically shallow (10 to 20 inches) and have developed in residuum from sandstone. The <br />rangeland soils are Lithic Haplargids, shallow Typic Haplargids, Lithic Ustollic Calciorthids, <br />shallow Typic Haplocalcids, and Lithic Ustic Torriorthents. Also found in the study area are <br />Aquolls and Endoaquepts. These somewhat poorly to poorly drained soils provide wildlife <br />habitat and occur on drainage channels, swales, and low areas and have formed from alluvium <br />and slopewash. <br />The best sources of topsoil material within the New Horizon 2 Mine disturbance area are the <br />70B, D70B, 30C (1988 - 1996 disturbance areas), 98A, 98D and 98E (1999 proposed <br />(Revised October 2009) 2.05.4(2)(d) -13 <br />