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The fourth mapped unit, MS, are those areas that were disturbed during other periods of mining <br /> that have potential for either fill material or a source of suitable plant growth material. Generally, <br /> this mapping unit resulted from the leveling of hill tops or ridges by bulldozers to allow for easy <br /> maneuvering or working of mining equipment. When these earlier disturbed soils were moved, <br /> parent material was exposed and in some instances the column was side-cast providing a suitable <br /> and highly localized plant-growth medium source. These areas will be salvaged but are not used <br /> in calculating topsoil needs for the entire site's reclamation plan. Soil and vegetation types are <br /> shown on Map C-1, mapped unit descriptions are detailed below. <br /> Map Unit OF <br /> A typical profile for this unit occurs in open areas where the dominant vegetation is Arizona <br /> fescue. In some areas encroachment of pine is occurring. Where protected and with adequate <br /> moisture retention, sagebrush occurs. Slopes in this unit generally range from 0 to 5 percent <br /> (UFA phrase), though in some areas the slope may range from 5-15% (UFB phrase). Soils <br /> within this mapping unit area are well drained with moderate permeability. Erosion hazard due <br /> to wind and water is moderate. <br /> Map Unit FA <br /> Soils of this unit occur under the forest canopy. The dominant tree species is lodgepole pine <br /> with aspen and very small amounts of spruce interspersed. Two phases of the FA map unit occur <br /> within the area: FAA, on slopes of 0 to 5 percent, and FAB, on the 5 to 15 percent slopes. Soils <br /> within this map unit are well draining with moderate to rapid permeability and may or may not <br /> have gravelly or cobbly profiles above the C horizon. Soils within this map unit have moderate <br /> erosion hazards. <br /> Map Unit GO <br /> Soils of this unit occur on north/south trending lateral moraines of past glaciations. They are <br /> generally very gravelly with cobbles occurring below 12 inches depth. The textures below 24 <br /> inches are usually cobbly loam or cobbly sandy loams. These textures generally prevail to <br /> Alma Placer Mine (.re$IA wki and Awxialrs,PI I <br /> December 2017 1-3 <br />