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Monierco Fine Sandy Loam, 0 to 10% slope. The Bowbac-Bowdish and Darvey-Barx complex units <br /> are used primarily for irrigated hayland or pastureland. Portions of the Monierco unit are developed <br /> for irrigated pastureland, while other portions of the unit support native sagebrush rangeland. Other <br /> map units from which soil salvage will occur within the revision area include Haplargids- <br /> Endoaquepts Association, which occurs primarily along artificially subirrigated drainage swales, and <br /> several upland soil types which support native sagebrush rangeland. A two lift salvage procedure <br /> will be utilized on all map units, with the exception of two relatively shallow upland soils. Valley <br /> City-Rock Outcrop Complex, and Wahweap Fine Sandy Loam, 10 to 30% slope. These shallow <br /> rangeland soils will be salvaged using a single lift procedure. <br /> Vegetation, Wildlife and Land Use <br /> Six general vegetation types are found on the New Horizon Mine 2 area: irrigated pasture, irrigated <br /> hay land, irrigated cropland (small grains), Swale/drainage, sagebrush/grass, and various <br /> miscellaneous types related to old farmsteads, abandoned orchards, and disturbed areas. The New <br /> Horizon 2 area is intensively used for agricultural. Irrigated agricultural land (pasture, hayland, and <br /> cropland) comprises 491.84 acres, or 60.85 percent of the total 808.3-acre permit area. The <br /> swale/drainage vegetation type accounts for 72.64 acres, or 9.43 percent of the total proposed permit <br /> area addition, while the upland area sagebrush/grass type covers 92.5 acres, or 11.44 percent. Roads <br /> and miscellaneous types account for the remainder of the land area, 42.28 acres, or 5.85 percent. <br /> The same basic vegetation types were identified in a 1999 study conducted within the PR-05 revision <br /> area, with certain modifications. As in previously approved portions of the New Horizon Mine 2 <br /> area, irrigated agriculture supporting livestock pasture and hayland is the the dominant land use. <br /> Other land uses such as grazing of sagebrush habitats and wildlife use are largely incidental to <br /> management associated with the irrigated lands. Irrigated pastureland comprised 56% of the PR- <br /> 05PR-05 revision acreage, and irrigated bayland comprised 16% of the acreage. Native sagebrush <br /> rangeland was separated into two separate vegetation types, SG-1 which comprised 17% of the <br /> disturbance acreage, and SG-2, which comprised 2% of the disturbance acreage. The SG-1 type <br /> occurs primarily on mesa tops and shoulder slopes. where shrub vigor and form are restricted by <br /> shallow depth to bedrock. The SG-2 type occurs on mesa sides and toe slopes, and generally <br /> supports more vigorous, taller sagebrush due to deeper soils. Both sagebrush types have been <br /> severely altered by past management, with understory dominated by undesirable invasive plant <br /> species. The Swale/Drainage type occurs on approximately 5% of the proposed disturbance acreage, <br /> and exists due to the presence of subirrigation along swales resulting from irrigation of adjacent <br /> pasture and haylands. <br /> The area surrounding the New Horizon Mine permit is used by a large variety of wildlife including <br /> coyotes, fox, mule deer, elk (in the winter) and numerous bird species. <br /> 10 <br />