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The locations of the 30 forage production transects sampled on this site are shown on Map 18, <br />Old Portal Reference Area - 2013 Transect Location Map. The sample adequacy calculations <br />in Table 2, 2013 - Statistical Summary and Sample Adequacy Calculations, document that the <br />number of samples required to characterize this site with respect to the parameter of forage <br />production at the 90% confidence interval was 62.7 transects. <br />Species Diversity. The four most dominant plant species contributed 9.52% of the total plant <br />cover or 71.79% of the total relative plant cover. Warm season grass species contributed 1.74% <br />of the total plant cover or 12.86% of the total relative cover. The two most dominant warm season <br />plant species contributed 1.65% of the total plant cover or 12.44% of the total relative plant cover. <br />When this site was originally sampled in 1980, Keenan, Inc. reported that warm season grass <br />species contributed 3.92% of the total basal cover or 34.42% of the total relative basal cover. The <br />two most dominant warm season plant species contributed 3.75% of the total basal cover or <br />32.92% of the total relative basal cover. The four most dominant plant species contributed 5.69% <br />of the total basal cover or 49.96% of the total relative basal cover found on this site. <br />Shrub Density. The results obtained from the sampling of the 30 shrub density transects are <br />found in Table 17, Old Portal Reference Area - 2013 Shrub Density. Woody plant density <br />averaged 3 1. 10 woody plants per 20 m2 or 6,293.1 woody plants per acre. <br />The locations of the 30 shrub density transects sampled on this site are shown on Map 18, Old <br />Portal Reference Area - 2013 Transect Location Map. The sample adequacy calculations in <br />Table 2, 2013 - Statistical Summary and Sample Adequacy Calculations, document that the <br />number of samples required to characterize the parameter of woody plant density at the 90% <br />confidence interval was 47.4 transects. <br />CORLEY RECLAMATION <br />Plant Cover. The results obtained from the 2013 sampling of the 15 plant cover transects on the <br />Corley Reclamation Study Area are presented in Table 18, Corley Reclamation - 2013 Plant <br />Cover. "Total plant cover" averaged 28.47%, litter cover averaged 37.00%, and "allowable plant <br />cover" averaged 26.67%. <br />Perennial grasses was the dominant plant life form encountered, contributing 23.20% of the total <br />plant cover or 81.50% of the total relative plant cover. Woody plants was the second most <br />dominant plant life form and contributed 3.40% of the total plant cover or 11.94% of the total <br />relative plant cover. Annuals and biennials contributed 1.53% of the total plant cover or 5.39% of <br />the total relative plant cover. Noxious weeds was the fourth most dominant plant category, <br />contributing 0.27% of the total plant cover and 0.94% of the total relative plant cover. Perennial <br />forbs was the fifth most dominant plant form, contributing 0.06% of the total plant cover or 0.24% <br />of the total relative plant cover. <br />The dominant plant species encountered on this site was Blue Grama which contributed 9.60% of <br />the total plant cover or 33.72% of the total relative plant cover. Intermediate Wheatgrass, was the <br />second most dominant plant species, contributing 6.07% of the total plant cover or 21.31 % of the <br />total relative plant cover. The third most dominant species was Rubber Rabbitbrush, which <br />contributed 3.07% of the total plant cover or 10.77% of the total relative plant cover. Sand <br />Dropseed and Sideoats Grama were the fourth most dominant species encountered, each <br />contributing 2.47% of the total plant cover or 8.66% of the total relative plant cover. <br />The locations of the 15 cover transects sampled on this site are shown on Map 19, Corley <br />Reclamation - 2013 Transect Map. The sample adequacy calculations in Table 2, 2013 Mine - <br />16 <br />