2018-08-30_PERMIT FILE - C1982057 (2)

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slender wheatgra ss, and sq uirreltail (Sitanion hystrix). Fo rbs occurring in this type • included scarlet globemallow (Sphaeralcea coccinea), Engelmann fleabane (Erigeron engelmanii), western yarrow (Achi llea lanulosa), Lewis flax (Linum lewi sii), tapertip onion (Allium acumi na tum), and cu rlycup gumweed (Crindelia squarrosa). Annual species include Japanese brome (Bromus japonicus), tumbling mustard (Sisymbrium al tissimum), fanweed (Thlaspi arvense), and Russian thistle (Salsola iberi ca ). The Creasewood type occurring in the proposed hual road corridor is quite variable with regard to shrub densities. Because of the small area of the type, it was difficult to accurately measure shrub densities. Four 50 m x 1 m transects were read in order to provide some quantitative observations. Alkali sagebrush was the most frequently occurring shrub making up over 70 percent of the shrubs counted in the transects. Black greasewood constituted 22 percent of the shrubs counted with rubber rabbi tbrush making up the remaining 5 percent counted. Small amounts of Douglas rabbi tbrush and broom snakeweed also were present but did not occur in the transects. Shrub heights for black greasewood ranged from 72 cm to 115 cm, alkali sagebrush ranged from 10 cm to 50 cm, and rubber rabbitbrush had a shrub height range of 15 to 70 cm. Shrub densities averaged 72 stems/SOmz or 5,827 stems/acre. • The range site for the Greasewood type as determined by the soils present and species composition is Alkaline Slopes. This site can occur on gently sloping benches as is found on the type. Range condition for the type was estimated to be fair. At this time, none of the greasewood type is used for grazing. The type is either bordered by wheat fields and roads in areas too small to be managed, or is not fenced for grazing management. The area to be disturbed in this type is approximately 11 acres and is insignificant in relation to the approximately 185 acres to be disturbed along the entire haul road corridor. Additional Types Associated with the 1989 Realignment. Mountain Big Sagebrush. Approximately 4.6 acres of the mountain big sagebrush type occurs in the far eastern end of the haul road corridor (see revised Exhibit 10-2 and Table • 10-2). The dominant species is mountain big sagebrush with a variety of herbaceous 28