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revegetation shrub density success standard for this reclaimed site is 1,500 stems per acre 37.06 <br />stems per 100 m . Since this site averaged 5,165.2 shrubs per acre and sample adequacy was <br />achieved for shrub density sampling using the reverse null statistical test, it can be concluded by <br />direct comparison that this area satisfies the revegetation success standard with respect to shrub <br />density. <br />When IME sampled this site in 2005, shrub density averaged 159.67 shrubs per one hundred <br />square meters or 6,461.8 shrubs per acre. When sampled in 2009, the average shrub density was <br />determined to equal 196.03 shrubs per one hundred square meters or 7,933.3 shrubs per acre. <br />The locations of the 30 shrub density transects sampled on this site are shown on Map 4, Tipple <br />Reclamation - 2010 Vegetation Transect Location Map. Examination of the sample adequacy <br />calculations in Table 2, Marr Mine - 2010 Statistical Summary and Sample Adequacy <br />Calculations, reveals the number of samples required to characterize the shrub density on this <br />reclaimed site at the 90 percent statistical confidence interval was 13.3 transects. Since the <br />actual shrub density counts on the reclaimed site (5,165.2 shrubs per acre) exceeds the approved <br />standard (1,500 stems per acre), using the DRMS regulations, revegetation success with respect <br />to shrub density was achieved on this site. <br />Application of the reverse null statistical approach on the shrub density data from the Kerr <br />Tipple Reclamation area, yields a t, value of 24.5842. Since this t, value is greater than the table <br />t value at an alpha error probability level of 0.20 which corresponds to a t value of 1.311, H is <br />rejected and the revegetation woody plant densities on this site is considered successful, using <br />the DRMS regulations found in Rule 4.15.11. However, since the shrub density on the 1999 <br />Reclaimed site exceeds the revegetation success standard, sample adequacy was achieved with <br />30 transects. <br />Species Diversity. The forage quality index calculations for this site are found in Table 16, <br />Tipple Reclamation - 2010 Forage Quality Index Calculations. As are documented there, the <br />forage quality index value for the Tipple Reclamation site as sampled in 2010 was determined to <br />equal 299.41. Since the forage quality index value of 299.41 on the Tipple Reclamation site <br />exceeds the Tipple Reference Area value of 189.23, it can be concluded that the species <br />diversity /forage quality revegetation success standard for the Tipple Reclamation area for the <br />Marr Mine has been satisfied.. <br />Conclusions <br />With respect to the successfulness of revegetation efforts performed at the Marr Mine site in <br />2010, it can be concluded that since sample adequacy was achieved for plant cover sampling on <br />the Alkali Sagebrush Reference Area and the corresponding 1999 reclamation sites, and the plant <br />cover growing on the revegetated sites exceeds the calculated success standard, it can be <br />concluded that the total plant cover growing on these sites is considered successful with respect <br />to the revegetation success standard for plant cover. <br />13 <br />