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exceeds the revegetation success standard for this site (33.93 %) and sample adequacy was <br />achieved for plant cover on both the Tipple Reference Area and the Tipple Reclamation sites, it <br />can be concluded by direct comparison that the "total plant cover" in this reclamation block <br />satisfies the revegetation success standard of Phase III Bond Release. <br />Production. The results from the 30 production transects sampled in this area are summarized <br />in Table 14, Tipple Reclamation - 2010 Production. The average total herbaceous forage <br />production on this site in 2010 averaged 26.70 g/l /4m or 951.6 pounds of air -dry forage per <br />acre. Perennial grasses contributed 22.50 g/1 /4m or 84.27 percent and perennial forbs <br />contributed 4.20 g/1 /4m or 15.73 percent of the total herbaceous forage production on this site. <br />The revegetation forage production success standard for this area corresponds to the forage <br />production from the Tipple Reference Area which averaged 4.64 g/1 /4m or 165.4 pounds of <br />air -dry forage per acre. Since the forage production on this reclaimed site averaged 19.36 <br />g/1 /4m or 690 pounds of air -dry forage per acre and sample adequacy was achieved for <br />production sampling on the Tipple Reference Area but not on the Tipple Reclamation site using <br />the reverse null statistical test, it must be concluded by direct comparison that this area satisfies <br />the revegetation success standard with respect to total herbaceous forage production. <br />When RvIE sampled this site in 2005, total herbaceous forage production averaged 15.30 g/1 /4m <br />or 545.3 pounds of air -dry forage per acre. When sampled in 2009, this site produced 19.36 <br />g/1 /4m or 690 pounds of air -dry forage. <br />The locations of the 30 production transects sampled on this site are shown on Map 4, Tipple <br />Reclamation - 2010 Vegetation Transect Location Map. The sample adequacy calculations in <br />Table 2, Marr Mine - 2010 Statistical Summary and Sample Adequacy Calculations, document <br />that the number of production transects required to characterize the perennial herbaceous forage <br />production on this site at the 90 percent statistical confidence interval was 284.3 transects. Since <br />the reclaimed area production value (19.36 g/1 /4m or 690 pounds of air -dry forage per acre) <br />exceeds the revegetation success standard of 4.64 g/1 /4m or 165.4 pounds of air -dry forage per <br />acre, it can be concluded that this area satisfies the sample adequacy requirements with respect <br />to forage production. <br />Application of the reverse null statistical approach on the Kerr Tipple Reclamation production <br />data obtained from this site, yields a t, value of 18.7275. Since this t value is greater than the <br />table t value at an alpha error probability level of 0.20 which corresponds to a t value of 1.311, <br />H is rejected and the revegetation production on this site is considered successful, using the <br />DRMS regulations found in Rule 4.15.11. However, since the production on the Tipple <br />reclaimed site exceeds the revegetation success standard, sample adequacy was achieved with 30 <br />transects. <br />Shrub Density. The shrub density transects taken in this area are summarized in Table 15, <br />Tipple Reclamation - 2010 Shrub Density. The average shrub density was determined to equal <br />127.63 shrubs per one hundred square meters or 5,165.3 shrubs per acre. Rubber Rabbitbrush, <br />Wyoming Big Sagebrush and Geyer's Willow were the most commonly encountered shrubs. The <br />12 <br />