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Reject rock from a rotary breaker at the power plant was never transported back to the mine <br /> site and deposited at the pit. The Nucla Power Plant is no longer in operation and has been <br /> decommissioned. <br /> X. Backfilling and Grading <br /> A. The Division has approved the applicant's plan for disposal of acid-forming or toxic <br /> materials in a manner designed to prevent contamination of ground or surface waters <br /> (4.14.3(l)(a)). <br /> B. Backfilling and grading of the overburden occurs simultaneously with overburden <br /> removal. The generation of excess overburden is not anticipated. Map 2.05.3-1 gives <br /> a cross-sectional view of the typical mining process. <br /> C. Permit details on backfilling and grading are provided in Section 2.05.4(2)(c). The <br /> proposed post-mining topography is depicted on Map 2.05.4-1. This map also includes <br /> a series of cross sections which provide comparisons of the pre-mining ground surface <br /> with the proposed post-mining elevations. <br /> XL Revegetation <br /> The proposed revegetation plan is designed for the post-mining land uses of irrigated pasture, <br /> cropland-irrigated alfalfa hay and dryland pasture. All revegetation plans are discussed in <br /> Section 2.05.4 (2)(e). <br /> A. Introduced Species <br /> The Division proposes to approve the use of introduced species in the reclamation seed <br /> mix. The applicant has submitted information that shows that the introduced species <br /> are desirable and necessary to achieve the approved post-mining land use, and are not <br /> poisonous or noxious (4.15.2). <br /> Seed mixes number 2 and 3 are temporary seed mixes. Introduced species in these <br /> mixes will facilitate site stabilization and provide organic matter when incorporated into <br /> the topsoil prior to permanent seeding. <br /> Seed mix numbers 5 and 6 are for the reclaimed irrigated pastureland. All species are <br /> in these mixes are introduced and were selected as beneficial for grazing purposes as <br /> discussed in Section 2.05.4(2)(e). <br /> Seed mix number 7 is for the cropland — irrigated alfalfa hay. A companion crop of <br /> triticale or an alternative winter annual grain will be seeded along with the alfalfa. <br /> 27 <br />