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vegetative cover on reclaimed parcels. TMI has identified specific percent effective cover standards for <br /> each range site category. The standards were calculated using the Universal Soil Loss Equation(LISLE), <br /> and designed such that soil loss due to rill and sheet erosion will not exceed premine levels. Details <br /> regarding revegetation success standards at the Trapper mine can be found in section 4.4.1 of Trapper's <br /> permit. Vegetation was sampled during the 2020 field season. Sampling was conducted in accordance <br /> with the approved sampling methodology. Vegetative cover was sampled to adequacy, in accordance <br /> with Rule 4.1 5.11(2). <br /> The SL22 bond release block has been reclaimed with either Rangeland A or Rangeland B seed mixes. <br /> The rangeland revegetation success standard comprises permit Section 4.4. For both range sites A <br /> and B, the reclamation success standard for cover includes canopy cover of herbaceous vegetation <br /> plus vegetative litter. The successful vegetative cover standard was calculated using the Universal <br /> Soil Loss Equation (LISLE), with the assumption that soil loss will not exceed 4 tons /acre/year. For <br /> Range Site A, vegetative cover will be acceptable when the site achieves at least 33% herbaceous <br /> cover plus 19% litter, and a total allowable cover value of at least 52%. Noxious weed species may <br /> not contribute to the reclamation success. Reclaimed Range Site B sites will be deemed successful <br /> when they achieve a minimum of 29%herbaceous cover,plus 23% Litter, for total allowable cover of <br /> at least 52%. <br /> Bond Release Blocks Delineation <br /> As discussed in permit section 4.4.1, reclaimed parcels are compared to three different range <br /> standards based on elevation: <br /> 1. Range site A standards apply to elevations greater than 7200 feet <br /> 2. Range site B standards apply to elevations between 6700 and 7200 feet <br /> 3. Range site C to elevations below 6700 feet <br /> with parcels delineated based on <br /> 1. Pit name <br /> 2. Range site type <br /> 3. Initial year of seeding. <br /> In accordance with permit section 4.4.1.5,contiguous areas reclaimed as Range Site A and Range Site <br /> B seeded in the same year and receiving similar reclamation practices may be combined into one <br /> range site AB parcel. When Bond Release Blocks (BRB) are comprised of both Range Site A and <br /> Range Site B parcels, the more stringent reclamation success standards for Range Site A shall apply <br /> to the combined data. <br /> Trapper Mining,Inc. provided, in the SL22 application,documentation of the seed mixtures planted <br /> for each parcel. Seed mixes used were in accordance with the approved reclamation plan. The <br /> seven parcels making up the 175.0 acre bond release block in SL22 and shown on Map 1 of page 5 of <br /> this document,comprised a mix of range site A and B. and therefore were aggregated.The revegetation <br /> standard for range site A was used to evaluate revegetation success since this designation represents the <br /> most conservative standard in accordance with section 4.4.1.5 of Trapper's permit. <br /> The reclaimed landscape was evaluated for evidence of erosional features. Evaluation of the post- <br /> mining land use was considered during the Division's review of the bond release application. The <br /> specific parcels within SL22, the seed mix used, verified topsoil depths, and the dates of previous <br /> Permit Number C1981010 <br /> SL22 Page 8 of 18 <br />