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• Comparison of the calculated t-statistic (f) for the revegetated community with the respective tabular t <br />value indicates that Y is far greater than t, resulting in the conclusion that the production performance <br />standard was met at the required significance level of a = 0 1 for the reclaimed area in 2000 <br />3.4 Div si <br />Evaluation of diversity in accordance with Rules 3.03 and 4.15 results in a positive finding regarding <br />the 2(100 data. In this regard, review of the third section of Table RS 1 indicates that the diversity of <br />perennial species that contribute between 3 and 60 percent of the relative cover (composition) for the <br />reclaimed area substantially exceeds the standard for 2000. The standazd is 4 perennial, non-noxious <br />species, with at least 2 being grass species and 1 being a fort or shrub. In 2000, the recaimed area ~ <br />exhibited 4 perennial grasses, 2 perennial forts and 1 shrub within the appropriate limits for a total of <br />seven perennial, non-noxious spades. Therefore. the performance standard has been met with absolute <br />gonfidence. <br />3.5 Utility <br />Although a determinafion of utility is not mandated by permitting requirements, little argument can be <br />generated regarding the revegetated area's utility for the primary intended post-mining land use (livestock <br />grazing) as well as the ink9dental use by wildlife. The increased ulilify of these revegetated areas is <br />evident from an analysis of the various data collected for cover, production, and diverstty. <br />With regard to the measured variables, the increase in u61Ry of the redaimed area is seH~vident. <br />The overall average perennial herbaceous cover of the recaimed azea in 2000 exhibited 155% of that <br />found on the extended reference area Average perennial production of the redairned area in 2000 <br />exhibited 610% of that found on the extended reterence area. Therefore, measured ground cover has <br />been increased by one and a half times that of the reference area while measured production has been <br />increased over sixfold. <br />Wth regard to canrying capacity, assuming proper utilization of usable forage spades (50°,6) and a <br />consumption rate of 1000 pounds of forage per animal unft per month, the reference area averaged <br />approximately 0.121 AUMs (Animal Unit Months) per aae in 2000. Similarty, the revegetated area <br />averaged a carrying capacity of 0.74 AUMs per acre in 2000. This value is over six times the capacty of <br />the surrounding Mountain Brush -dry phase, and pinon-juniper woodland. <br />aas~em a~~ ~aaossn, wc. Page 13 Nert~ Thompson Ctesk Mlnea Plmse II a 111 9or1d Release Evaluation <br />