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Final Revegetation Success Standards <br />Final revegetation success will be judged for vegetative cover and herbaceous production <br />through the use of the approved predictive equations for total vegetation cover and total <br />herbaceous production. Species composition will be evaluated using the approved success <br />standard. <br />Quantitative comparisons for vegetation cover and herbaceous production will be made using the <br />Student's t-test or Confidence Interval test. Reclaimed area cover and herbaceous production <br />values will be evaluated for statistical equality to the values from the respective predictive <br />equations if the reclaimed area values do not equal or exceed the predictive values. Species <br />composition will be judged on meeting the species composition standard. <br />Total vegetation cover. Reclaimed areas will be considered successfully reclaimed if the total <br />vegetation cover on the reclaimed area(s) is not less than 90 percent of the total vegetation cover <br />value from the equation: y =0.0127x3 + 0.2115x2 +2.1772x (where x is the cumulative <br />September - July precipitation at the mine) with 90 percent statistical confidence using a one- <br />tailed Student's t or Confidence Interval test. <br />Herbaceous production. Reclaimed areas will be considered successfully reclaimed if the total <br />herbaceous production on the reclaimed area(s) is not less than 90 percent of the total <br />2.1405 <br />herbaceous production value from the equation: y =0.4666x (where x is the cumulative <br />September - July precipitation at the mine) with 90 percent statistical confidence using a one <br />tailed Student's t or Confidence Interval test. <br />Woody plant density. There is no woody plant density revegetation success standard. <br />Species composition. Reclaimed areas will be considered successfully reclaimed if the <br />grass species composition on any reclaimed area includes at least four perennial species of <br />any seasonality combination. Relative cover of each of these grass species must be greater <br />than or equal to 3% and less than or equal to 40%. Grass species that may be used in <br />evaluating species composition may be any that not defined as noxious or prohibited by the <br />State of Colorado, and may be native or introduced. <br /> ЊЊЏĬ АΉЋЉЋЉ <br /> <br />