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1.3 Backaround and Standards for Success <br /> The Bowie No. 1 Mine is located approximately three miles northwest of Paonia, Colorado in a semi- <br /> arid mountain ecosystem. Small tree and dense shrub vegetation communities surround the mine area <br /> and are dominated by Utah juniper (Juniperus osteosoerma) and Gambel oak (Quercus gambeiii). The <br /> post-mining land use of revegetation is livestock grazing, as well as deer and elk winter habitat. The <br /> original permit for Bowie No. 1 describes the sampling procedures and success standards for the original <br /> planned reclamation (Run of Mine, East Mine, and West Mine). Revised success criteria used in this Phase <br /> III evaluation are based on Technical Revision No. 63, Preliminary Adequacy Review(TR-63). The changes <br /> implemented in TR-63 are based on results of Phase II Bond Release Success monitoring conducted in <br /> 2013 (West Mine and Run of Mine) and 2016 (East Mine). The current success criteria and standards are <br /> as follows: <br /> • Achieve a Total Plant Cover of >_ 90% of the Total Plant Cover Standard of 60% (54%) —West <br /> Mine <br /> • Achieve a Total Plant Cover of >_ 90% of the Total Plant Cover Standard of 40% (36%) — East <br /> Mine and Run of Mine. <br /> • Achieve annual herbaceous production levels of >_ 90% of 450 pounds per acre (405) —West <br /> Mine. <br /> • Achieve annual herbaceous production levels of >_ 90% of 400 pounds per acre (360) — East <br /> Mine and Run of Mine. <br /> • Achieve a woody plant density of >— 90% of 100 shrub, sub-shrub or trees per acre (90). <br /> • Achieve a species diversity of >— 5 native or introduced, perennial herbaceous species with <br /> between 0.5% and 60% relative cover. <br /> • Achieve a species diversity of >_ 3 native, cool-season perennial grass species with between <br /> 0.5% and 60% relative cover. <br /> • Achieve a species diversity of >_ 2 native or introduced perennial forb species with between <br /> 0.5% and 60% relative cover. <br /> • Achieve a species diversity of >_ 2 native shrub, tree or sub-shrub species, not exceeding a <br /> relative cover value of >— 80%. <br /> CEDAR CREEK ASSOCIATES, Inc. 5 Bowie #1 Mine-West Mine - 2021 <br /> Phase III Bond Release Evaluation <br />