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• the CDMG, it was tested in the1999 sampling program. The sagebrush reference area <br />represents remnants of native rangeland that has not been converted to the more <br />characteristic intensive agricultural land uses in the area. The sagebrush reference area is <br />located at SW1/4, NE1/4, Sec. 36, T.47N., R.16W. Between the old Peabody Site to the north <br />and New Horizon Mine II study area to the south. Soil is similar to study area soil map unit 98C <br />and the vegetation is similar to the sagebrush-1 (SG-1) in the study area. <br />Total vegetation cover (first hit) for the type averaged 36.0 percent, with bare ground at 32.5 <br />percent, litter at 19.9 percent, and rock outcrop and rock fragments at 11.6 percent (Table <br />2.04.10-27). Lichen and moss accounted for 4.6 percent of the mean cover. The shrub <br />component dominated with 14.4 percent cover followed by the perennial grass component at <br />11.9 percent cover. Annual grasses account for 4.1 and 2.6 percent cover. Succulents had <br />0.1 percent cover and trees had 0.9 percent cover. Consistent with the type designation, <br />sagebrush (Artemisia tridentata) had the highest perennial shrub species cover at 12.2 percent <br />(68 percent frequency), followed by broom snakeweed with cover at 1.9 percent (8 percent <br />frequency). The perennial grass blue grams had 7.4 percent cover (33 percent frequency) and <br />needlegrass with <br />l J <br />• (REVISED 9/99) 2.04.10 - 81 <br />