Laserfiche WebLink
• level of 0.20 which corresponds to a t value of 0.854,1-Io is rejected and the revegetation <br />production on this site is considered successful, using the DMG's recently adopted regulations. <br />Shrub Densiri. The shrub density counts obtained from the 30 belt transects taken in this area <br />are summarized in Table 15, 1996 Reclamation -Shrub Density. The average shrub density was <br />determined to equa151.03 shrubs per one hundred square meters or 2,065.2 shrubs per acre. <br />Wyoming Big Sagebrush, Douglas Rabbitbrush and Silver Sagebrush were the most commonly <br />encountered shrubs. The revegetation shrub density success standard for this area is 1,500 stems <br />per acre. Since this site averaged 2,065.2 stems per acre, it can be concluded that this area <br />satisfies the revegetauon success standard with respect to shrub density. <br />The locations of the 30 shrub density transects sampled on this site are shown on Map 5, 1996 <br />Reclamation -Vegetation Transect Location Map. Copies of the individual field data sheets for <br />the woody plant density sampling of this site are found in Appendix N -Copies of 1996 <br />Reclamation -Shrub Density Field Data Sheets. Examination of the sample adequacy <br />calculations in Table 2, Kerr Mine Sample Adequacy Calculations, reveals the number of <br />samples required to describe the shrub density on this area at the 90 percent confidence interval <br />was 124.1 transects. Since the actual shrub density counts on this reclaimed site (2,065.2 stems <br />per acre) exceeds the approved standard (1,500 stems per acre) it appears that this site satisfies <br />the revegetauon shrub density standard. Using the reverse null statistical approach to the <br />production data obtained from this site, yields a 4 value of 1.4878. Since this 4 value is greater <br />than the table t value at an alpha error probability level of 0.20 which corresponds to a t value of <br />• 0.854, I-Io is rejected and the revegetation production on this site is considered successful, using <br />the DMG's recemly adopted regulations. <br />Species Diversity. The percent relative composition or cover values in Table 10, 1996 <br />Reclamation -Plant Cover, documents that the four most dominant plant species growing on taus <br />reclaimed site account for 48.28 percent of the total relative cover found on this site, which is <br />well below the maximum of 83 percent relative plant cover allowed by the Pemtit. The single <br />most dominant plant species was found to be Russian Wildrye which contributed 21.39 percent <br />of the total relative cover found on this site, less than the 40 percent maximum value allowed for <br />a single species, with one of the four dominants being a forb and one is a shrub. When ESCO <br />sampled this site in 1999, they reported that the four most dominant species contributed 79.71 <br />percent of the total relative cover, with the most dominant plant contributing 38.41 percent of the <br />total relative cover on this site and one of the four dominants was a perenniai forb. These <br />revegetation monitoring data from this site confirm that the species diversity standards for this <br />reclaimed site are currently and have historically been satisfied. <br />1999 RECLAMATION <br />Plant Cover. The results obtained from the sampling of the 15 plant cover transects on this <br />reclaimed site are presented in Table 16, 1999 Reclamation -Plant Cover. Total plant cover on <br />this site averaged 33.27 percent and litter cover averaged 27.27 percent (Table 16, 1999 <br />Reclamation -Plant Cover). <br />• <br />is <br />