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• The locations of the 30 production transects sampled on this area aze shown on Map 2, Alkali <br />Sagebrush Reference Area -Vegetation Transect Location Map. Copies of the field data sheets <br />corresponding to this site are found in Appendix D -Copies of Alkali Sagebrush Reference Area <br />- Production Field Data Sheets. Examination of Table 2, Kerr Mine Sample Adequacy <br />Calculations, reveals that sample adequacy at the 90 percent confidence interval was equal to <br />10.3 transects. <br />PRE-1986 RECLAMATION <br />Plant Cover. The results obtained from the sampling of the 15 plant cover transects on this site <br />are presented in Table 7, Pro-1986 Reclamation -Plant Cover. Total plant cover on this site <br />averaged 39.20 percent and litter averaged 26.40 percent (Table 7, Pre-1986 Reclamation -Plant <br />Cover). <br />The revegetation success standazd for this site is 31.70 percent total plant cover. Examination of <br />Table 7, Pre-1986 Reclamation -Plant Cover, reveals that the "total plant cover" on this site <br />averaged 39.20 percent. Since the actual "total plant cover" value (39.20 %) for this reclaimed <br />site exceeds the revegetation success standazd for this site (31.70 %), and sample adequacy was <br />achieved for both reference areas and on this reclaimed site as well, it can be concluded by direct <br />comparison that the "total plant cover" in this reclamation block satisfies the revegetation <br />success standard. <br />• Perennial grasses dominated the seeded vegetation on this site. Sheep Fescue, Western <br />Wheatgrass, Smooth Bromegrass and Russian Wildrye were the most commonly encountered <br />grasses, contributing 29.42, 12.42, 6.12 and 5.61 percent, respectively, of the total relative cover <br />found on this site. Drummond Milkvetch and Pacific Aster were the most commonly <br />encountered perennial forts on this site, contributing 5.10 and 4.42 percent of the total relative <br />cover, respectively. Wyoming Big Sagebrush contributed a total of 11.93 percent of the total <br />relative cover on this reclaimed site. <br />When this site was sampled in 1996, RMR reported that the total plant cover averaged 37.56 <br />percent. The four most dominant species were Western Wheatgrass, Russian Wildrye, <br />Thickspike Wheatgrass, and Slender Wheatgrass; which contributed 17.95, 17.75, 14.40 and <br />6.71, respectively, of the total relative cover on this site. In 1999, ESCO reported that the total <br />plant cover on this site averaged 23.8 percent. The four most dominant species were Russian <br />Wildrye, Sheep Fescue, Thickspike Wheatgrass, and Cicer Milkvetch; which contributed 17.52, <br />11.68, 9.85 and 9.85, respectively, of the total relative cover on this site. <br />The locations of the 15 cover transects sampled on this site in 2005 are shown on Map 3, Pre- <br />1986 Reclamation -Vegetation Transect Location Map. Copies of the individual field data <br />sheets for the plant cover sampling of this site are found in Appendix D -Copies of Pre-1986 <br />Reclamation -Plant Cover 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 with respect to total plant cover at the 90 percent confidence interval was determined to <br />• equa13.2 samples. <br />