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The overall geological nature of the area is <br />favorable to quarry operations at all four of the selected <br />sites. None are in drainage areas that would result in <br />adverse sedimentation problems. <br />4. Soils (productivity, erodibility, sediment yield) <br />(See soils map with enclosures at Attachment #3) <br />The entire area of the proposed quarry sites <br />consists mostly of rock outcrops on very steep slopes with <br />nondelineated soil inclusions that are generally stony or <br />gravelly. Also included are landslide areas and small <br />pockets of shallow and very shallow soils. No sediment data <br />is available for the area, but there appears to be little <br />erosion that would contribute sediment to the Colorado <br />River. <br />Topsoil throughout the area is rated as poor. Since <br />the texture of the soil is generally gravelly clay loam and <br />its permeability is slow to moderate, its stability rating <br />is generally poor. However, with the surface formation <br />consisting of extensive limestone outcrop areas, the flood <br />hazzard is minimal. <br />5. Water (floodplains, surface, ground, qualit <br />water use and rights) <br />The proposed quarry sites are located on a steep <br />ridge between two major perennial drainage channels, Oasis <br />and No Name Creeks, which flow generally southward to the <br />Colorado River. Along the ridge where the proposed quarry <br />sites are located are small intermittent stream beds that <br />carry the spring runoff and the water produced by the <br />