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4-49 Shrubs form approximately 50 percent of the vegetation cover, • while annual grasses and forbs contribute most of the remaining cover. See Table 4.5-16S. Gardner saltbush is the dominant shrub. Other shrubs sparsely present include shadscale saltbush, horsebush, low rabbitbrush, and broom snakeweed. Cheatgrass and blue mustard Chorispora tenella, an introduced annual weed, -provide most of the herbaceous cover and production. Other herbaceous plants present in the community include Gordon eriogonum sriogonum gordonii, Salina wildrye, and hoary aster Machaeranthera canescens. Shrub densities averaged 13 individuals/25 m2or 2,105 individuals/ ac. Gardner saltbush accounts for 72 percent of all shrubs in the density transects. Other shrubs present include those listed above as occurring in the cover transects. See Table 4.5-17S. Shrub heights were low, ranging from 18.0 cm for broom snakeweed • to 30.4 cm for shadscale saltbush. Gardner saltbush, the dominant plant, had an average height of 19.0 cm. See Table 4.5-17S. 4.5.2.2.5 Juniper Woodland The Juniper Woodland vegetation type occurs predominantly on an upland terrace in the area of the proposed refuse disposal area. The major soil types occurring on this terrace are the Torriorthents-rock outcrop complex, a shallow to deep alluvial soil derived from sandstone, and the Torriorthents-Uffens complex, a deep, well-drained loamy soil. Small patches of Juniper Woodland also occur along the haul road and coal conveyor corridor where it intercepts west-facing slopes of steep ridges. Total vegetation cover in the Juniper Woodland averages 37.3 percent. Litter, soil, and rock cover are all relatively high at 24.2, 22.6, and 15.9 percent, respectively. Cover by life form is as follows: trees, 29.8 percent; shrubs, 2.1 percent; • perennial grasses, 0.2 percent; annual grasses, 3.1 percent;