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rockfall deposits. Depth to a root restrictive layer, lithic bedrock, is 10 to 70 inches. Approximately 30% <br />of this soil unit consists of rock outcrops. Water movement in the most restrictive layer is moderately <br />high. Available water to a depth of 60 inches is very low. Shrink -swell potential is low. This soil neither <br />floods nor ponds. There is no zone of water saturation within a depth of 72 inches. Organic matter content <br />in the surface horizon is about 1 percent. This soil does not meet hydric criteria. <br />2.4 Natural Communities <br />Natural vegetative community data was taken from the Colorado Vegetation Classification Project <br />(CVCP), a state -wide land cover mapping endeavor initiated by the Colorado Department of Natural <br />Resources - Division of Wildlife and the Bureau of Land Management. The following are <br />descriptions taken from CVCP; however, because CVCP mapping occurred on a very large scale, not <br />all mapped communities necessarily represent actual site conditions. Nine vegetative communities <br />are mapped onsite, as presented in Figure 6 and described below. <br />8 - RIPARIAN: Riparian areas along waterways or standing wetlands. Principal woody species include: <br />narrowleaf and common cottonwood, Russian olive, various willow species, and tamarisk. Herbaceous <br />species include: various sedges, scouring rush, and cattails. <br />3201 - SAGEBRUSH COMMUNITY: Shrubland principally dominated by sagebrush. Often associated with <br />rabbitbrush, bitterbrush, broom snakeweed, various grasses, and mixed cacti. Greasewood, serviceberry, <br />snowberry, or winterfat may also be present as secondary species. <br />3303 - SAGEBRUSH/MESIC MOUNTAIN SHRUB MIX: Co- dominant sagebrush mesic mountain shrubland <br />consisting of mountain big sagebrush and any combination of mountain snowberry, serviceberry, squaw <br />apple, or bitterbrush, often with a grass /forb understory. Understory species may include, among others, <br />elk sedge, bluegrass, needlegrass, arrowleaf balsamroot, lupines, penstemons, Indian paintbrush, and <br />mariposa lily. Often found at the higher elevations of the sagebrush zone, on north facing slopes, in <br />basins, or on other mesic sites. <br />4101 - PINYON - JUNIPER: Coniferous woodland principally co- dominated by pinyon pine and Utah <br />juniper or Rocky Mountain juniper. Understory is sagebrush, mixed mountain shrubs, or grasses, usually <br />at less than 25% cover. <br />• <br />5 <br />