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• PRE-1986 RECLAMATION <br />Plant Cover. The results obtained from the sampling of the 15 plant cover transects on this site. <br />Total plant cover on this site averaged 39.33 percent and litter averaged 26.40 percent (Table 7, <br />Pre-1986 Reclamation -Plant Cover). <br />The revegetation success standard for this site is 31.56 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 39.33 percent. Since the actual "total plant cover" value (39.33 %) for this reclaimed <br />site exceeds the revegetafion success standard for this site (31.56 %), and sample adequacy was <br />achieved with respect to plant cover for both reference areas and this reclaimed site, it can be <br />concluded by direct comparison that the "total plant covet' in this reclamation block satisfies the <br />revegetation success standard. <br />Perennial grasses dominated the seeded vegetation on this site accounting for 30.67 percent of <br />the total cover or 77.96 percent of the total relative cover on this site. Western Wheatgrass, <br />Russian Wildrye, Crested Wheatgrass and Sheep Fescue were the most commonly encountered <br />grasses, contributing 32.37, 14.92, 11.70 and 6.78 percent, respectively, of the total relative <br />cover found on this site. Pacific Aster and Eaton Daisy were the most commonly encountered <br />perennial forbs on this site, contributing 3.22 and I.52 percent of the total relative cover, <br />respectively. Wyoming Big Sagebntsh contributed a total of 9.66 percent of the total relative <br />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 />Wildtye, Sheep Fescue, Thickspike Wheatgrass, and Cicer Milkvetch; which contributed 17.52, <br />11.68, 9.85 and 9.85, respectively, of the total relative wver on this site. In the 2005 sampling, <br />total plant cover on this site averaged 39.20 percent. <br />The locations of the ] 5 cover transects sampled on this site in 2006 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, Marr <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 />equal 11.0 samples. <br />Production. The results of the 30 production transects on this area are summarized in Table 8, <br />Pre-1986 Reclamation -Production. The average forage production on this site averaged 22.10 <br />g/1/4mZ or 787.3 pounds of air-dry forage per acre. Perennial grasses contributed 18.84 g/1/4mZ <br />or 8..49 percent perennial forbs contributed 3.07 g/1/4mZ or 13.89 percent; and annua4s <br />• contributed 0.05 g/1/4mZ or 0.23 percent of the total herbaceous forage production on this area. <br />9 <br />