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Final Revegetation Success Standards <br />Final revegetation success will be judged for vegetative cover, herbaceous production, <br />and species composition through the use of the approved success standards. <br />Quantitative comparisons for vegetation cover and herbaceous production will be made <br />using the Student's t-test or Confidence Interval test. Reclaimed area vegetation cover <br />and total herbaceous production values will be evaluated for statistical equality to the <br />predictive equations if the reclaimed area values do not equal or exceed the predicted <br />value. Species composition will be judged on meeting the species composition standard. <br />Total vegetation cover. Reclaimed azeas will be considered successfully reclaimed to the <br />final revegetation success criterion if the total vegetation cover on the reclaimed area is <br />not less than 90 percent of the predicted vegetation cover value with 90 percent statistical <br />confidence using cone-tailed test using the equation: y = 0.0173 xj -0.8592 xZ + 14.562 x <br />-47.OI5, where x is the cumulative value of precipitation from September to July of the <br />following year at the mine and y is the resultant vegetation cover. <br />Herbaceous production. Reclaimed areas will be considered successfully reclaimed to <br />the final revegetaHon success criterion if the total herbaceous production on the reclaimed <br />area is not less than 90 percent of the total herbaceous production value with 90 percent <br />statistical confidence with aone-tailed test using the equation: y = 0.3749 xr'~'"~`, where x <br />is the cumulative value of precipitation from September to July of the following yeaz at <br />the mine and y is the resultant total herbaceous production. <br />Woody plant densiri. There is no woody plate density revegetation success standazd. <br />o`~~ <br />Species Composition. To meet the requirements of the final revegetation success <br />criterion for species composition, species composition on any reclaimed azea shall be <br />such that there are at least four perennial species of which three are warm season <br />perennial grasses and one is a cool season perennial grass. No one component of the <br />above four species should comprise greater than 40'/o relative importance nor less than <br />3% relative importance. Relative importance will be measured by calculating relative <br />cover of the revegetation species. Vegetation species that may be used in the calculation <br />of species composition may be any plant species not defined as a noxious or prohibited <br />plant species, and may be native or introduced. <br />~. <br />~ICob <br />