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• The cover success standard for all reclaimed sites at the Marr Mine is based upon a weighed <br />average of the two corresponding reference areas. Table 13, 1996 Reclamation -Plant Cover, <br />documents that the "total plant cover" on the 1996 reclamation averaged 32.73 percent. Since <br />this "total plant cover" value exceeds the revegetation success standard (31.70 %), and sample <br />adequacy was achieved for plant cover for the two reference areas and this reclaimed site, it can <br />be concluded by direct comparison that the "total plant cover" for the 1996 Reclamation Block <br />satisfies the revegetation success standard with respect to "total plant cover." <br />Perennial cool season grasses dominated the seeded vegetation in 2005. Russian Wildrye and <br />Westem Wheatgrass were the most wmmonly encountered grasses on tlis site, contributing <br />21.39 and 9.98 percent, respectively, of the total relative cover on this area The most dominant <br />fort species growing on this site was Lewis Flax which contributed 8.76 percent of the total <br />relative plant cover. The most dominant shrub was Wyoming Big Sagebrush which contributed <br />8.15 percent of the total relative cover on this reclaimed site. When ESCO sampled this site in <br />1999 they reported that the total plant cover averaged 32.5 percent and the four dominant species <br />were Western Yarrow, Lewis Flax, Flixweed Tandymustard and Small Burnet which contributed <br />38.41, 28.26, 7.61 and 5.43 percent, respectively, of the total relative cover on this site. <br /> <br />The locations of the 15 cover transacts sampled on this site are shown on Map 5, 1996 <br />Reclamation -Vegetation Traosect Location Map. Copies of the individual field data sheets for <br />the plant cover sampling of this site are found in Appendix L -Copies of 1996 Reclamation - <br />Plant Cover Field Data Sheets. The sample adequacy calculations in Table 2, Kerr Mine Sample <br />. Adequacy Calculations, document that the number of transacts required to describe this site at <br />the 90 perceat confidence interval was 3.2 samples. <br />Production. The results of the 30 production transacts sampled on this area are summarized in <br />Table 14, 1996 Reclamation -Production. This table shows that the average total herbaceous <br />forage production on this site equaled 37.90 g/1/4 m2 . Perennial grasses contributed 30.40 g/1/4 <br />m2 or 80.13 percent of the herbaceous forage produced on this area. Perennial fortis, contributed <br />7.41 g/1/4 mZ or 19.55 percent of the herbaceous forage production on this area and annuals, <br />contributed 0.09 g/1 /4 m2 or 0.23 percent of the herbaceous forage production on this area. <br />The revegetation forage production standard for this area is 7.40 g/1/4m2. Since this site <br />averaged 21.24 g/1/4mZ, it appears that this area satisfies the revegetation success standard with <br />respect to total herbaceous forage production. <br />The locations of the 30 production transacts sampled on this site are shown on Map 5, 1996 <br />Reclamation -Vegetation Transact Location Map. Copies of the individual field data sheets for <br />the forage production sampling of this site are found in Appendix M -Copies of 1996 <br />Reclamation -Production Field Data Sheets. The sample adequacy calculations in Table 2, Kerr <br />Mine Sample Adequacy Calculations, document that the number of samples required to describe <br />this site at the 90 percent confidence interval was 54.0 transacts. <br />Using the reverse null statistical approach to the production data obtained from this site, yields a <br />• fc value of 8.0554. Since this >c value is greater than the table t value at an alpha error probability <br />14 <br />