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regarding revegetation success standards at the Trapper mine can be found in section 4.4.1 of <br /> Trapper's permit. Vegetation was sampled during 2017. Sampling was conducted in accordance <br /> with the approved sampling methodology. Vegetative cover was <br /> sampled to sample adequacy, in accordance with Rule 4.15.11(2). A d ® R <br /> bond release inspection of the requested bond release block was ® - - <br /> conducted on August 29 and 30, 2017. Observations noted in the • <br /> inspection report are in agreement with the vegetation report . <br /> submitted with the SL 19 application. -40 <br /> The reclaimed parcels have been reclaimed with either the Rangeland <br /> A or the Rangeland B seed mixes. The rangeland revegetation success <br /> standard is found is permit Section 4.4. For both range sites A and B, _ - <br /> the reclamation success standard for cover is comprised of canopy <br /> cover of herbaceous vegetation plus vegetative litter. The successful � <br /> �m vegetative cover standard was calculated using the Universal of � - �y •- <br /> � w <br /> �'� � �,�.•,. �"`�°�md.:. .. nay .,, <br /> Loss Equation (LISLE), with the assumption that soil loss will not Photo 2:Heliomeris multiflora, or <br /> exceed 4 tons/acre/year. For Range Site A,vegetative cover will be showy goldeneye in parcel KAI]. <br /> acceptable when the site achieves at least 3 3%herbaceous cover plus 19% litter, for total cover of <br /> at least 52%. Noxious weed species may not contribute to the reclamation success. Reclaimed <br /> Range Site B sites will be deemed successful when they achieve a minimum of 29%herbaceous <br /> cover,plus 23% litter, for total cover of at least 52%. In accordance with permit section 4.4.1.5, <br /> parcels reclaimed as Range Site A and Range Site B can be lumped together to form an individual <br /> Bond Release Block. When a Bond Release Block(BRB) is comprised of both Range Site A and <br /> Range Site B parcels, the more stringent reclamation success standards for Range Site A shall <br /> apply to the combined data. <br /> To demonstrate that runoff from the reclaimed parcels will result in equivalent or lesser sediment <br /> contributions as compared to baseline conditions at the mine, TMI submitted two sediment loss <br /> evaluations; one based on the Universal Soil Loss Equation (LISLE), and a second utilizing <br /> SEDCAD analysis. The LISLE provides a basis for predicting the gross erosion per acre from an <br /> area on an annual basis. SEDCAD modeling evaluates both runoff and erosion estimates and <br /> provides results on the basis of single storm events. <br /> The Division's Guideline Regarding Selected Coal Mine Bond Release Issues dated April 18, 1995 <br /> outlines what the Division may use to evaluate reclaimed lands proposed for Phase II bond release. <br /> In summary, the Division may evaluate the following: <br /> o Topsoil replacement depths <br /> o Vegetation cover success standard <br /> o Species composition <br /> o Re-establishment of essential hydrologic functions on Alluvial Valley Floors (AVF's). <br /> o Erosional features <br /> o Sediment transport <br /> o The condition of sediment ponds and any needed maintenance on ponds receiving runoff <br /> from bond release parcels. <br /> 0 <br /> Permit Number C 1981010 <br /> SL19 <br />