Laserfiche WebLink
Using the reverse null statistical approach on the production data obtained from this site, yields a <br />t value of 30.2730. Since this t,, value is greater than the table t value at an alpha error <br />probability level of 0.20 which corresponds to a t value of 1.311, H is rejected and the <br />revegetation production on this site is considered successful, using the DRMS regulations found <br />in Rule 4.15.11. However, since the production on the reclaimed site exceeds the revegetation <br />success standard, sample adequacy was achieved with 30 transects. <br />Shrub Density. The shrub density counts obtained from the 30 belt sampled on this site are <br />summarized in Table 8, 1999 Reclamation - 2010 Shrub Density. The average shrub density <br />equaled 54.13 shrubs per one hundred square meters or 2,190.6 shrubs per acre. Wyoming Big <br />Sagebrush, Douglas Rabbitbrush and Rubber Rabbitbrush were the dominant shrubs found <br />growing on this reclaimed site. The revegetation shrub density success standard for this area at <br />the time of final bond release is 1,500 stems per acre or 37.06 stems per 100 m Since this site <br />averaged 2,190.6 shrubs per acre or nearly 46 percent more than the success standard, it can be <br />concluded by direct comparison, that the 1999 Reclamation site, satisfies the final revegetation <br />success standard with respect to shrub density. <br />When IME sampled this site in 2005, they reported that shrub density averaged 36.30 shrubs per <br />one hundred square meters or 1,358.6 shrubs per acre. When IME sampled this site in 2009, <br />they reported that shrub density averaged 75.57 shrubs per one hundred square meters or 2,936.9 <br />shrubs per acre. These monitoring data confirm the trends that native plants and shrubs are <br />continuing to increase on this reclaimed site over time. <br />The locations of the 30 shrub density transects sampled on this site are shown on Map 2, 1999 <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 transects required to characterize this site with respect to <br />shrub density at the 90 percent statistical confidence interval was 116.7 transects. <br />Application of the reverse null statistical approach on the shrub density data from the 1999 <br />Reclamation located at the Marr Mine, yields a t, value of 7.6545. Since this t 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 />1.311, H is rejected and the revegetation woody plant densities on this site is considered <br />successful, using the DRMS regulations found in Rule 4.15.11. However, since the shrub <br />density on the 1999 Reclaimed site exceeds the revegetation success standard, sample adequacy <br />was achieved with 30 transects. <br />Species Diversity. The forage quality index calculations for this site are found in Table 9, 1999 <br />Reclamation - 2010 Forage Quality Index Calculations. As are documented therein, the forage <br />quality index value for the 1999 Reclamation site at the Marr Mine as sampled in 2010 was <br />396.46. Since the forage quality index value of 396.46 on the 1999 Reclamation site exceeds the <br />Alkali Sagebrush Reference Area value of 199.36, it can be concluded that the species <br />diversity /forage quality revegetation success standard for the 1999 Reclamation area at the Marr <br />Mine has been satisfied. <br />