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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 /> herbaceous production value from the equation:y=0.4666x2.1405(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 /> 116b 7/2020 <br />