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10 <br /> it <br /> EXHIBIT I —Soils Information <br /> The soils in the area of the proposed operation area as mapped and described by the U.S.D.A. <br /> Soil Conservation Service consists of soils belonging to the Garita-Platoro complex and the <br /> Graypoint gravelly sandy loam,0 to 3 percent slopes. <br /> I. The Garita-Platoro complex consists of deep, well-drained soils formed on alluvial fans and <br /> terraces on alluvial valley floors. The Garita soils make up 55 percent of the unit, and the <br /> Platoro soils make up about 40 percent. Garita soils differ from the Platoro soils by having a <br /> laver of concentrated calcium carbonate and a greater percentage of rock fragments. Luhon <br /> loam and Rock River gravelly loam make up about 5 percent of the unit. <br /> The Garita soils are deep, well-drained, very gravelly soils. They formed in calcareous, <br /> gravelly alluvium derived principally from basalt. Typically, the surface layer is brown <br /> gravelly loam about 3 inches thick. The underlying material to a depth of 9 inches is brown <br /> gravelly loam. Below this to a depth of about 21 inches is white very gravelly loam that has <br /> concentrated accumulations of calcium carbonate. Between the depths of 21 and 60 inches, <br /> the soil is pale brown very gravelly loam and has less calcium carbonate than the laver above. <br /> In the Garita soils,permeability and available water capacity is moderate. The effective <br /> rooting depth is 60 inches or more,surface runoff is slow, and the hazard of erosion is slight. <br /> The Platoro soils are deep and well drained. They formed in alluvium derived mainly from <br /> igneous rocks.Typically, the surface layer is light brownish gray loam about 8 inches thick. <br /> The subsoil is brown clay loam in the upper 9 inches and calcareous brown gravelly clay loam <br /> in the lower 4 inches. The upper part of the substratum, about 12 inches thick, is brown very <br /> gravelly loam with visible calcium carbonate; and the lower part of the substratum,extending <br /> to a depth of 60 inches or more, is light brownish gray very gravelly loamy sand. Available <br /> water capacity is moderate and permeability is moderately slow. The effective rooring depth <br /> is 60 inches or more, surface runoff is medium and the hazard orerosion is slight. <br /> 2. The Graypoint gravelly sandy loam, 0 to 3 percent slopes, consists of deep well-drained soil <br /> found on broad fans and terraces on alluvial valley floors. The soil formed in alluvium <br /> derived principally from basalt. Included in this unit are small areas of Derrick gravelly loam <br /> and Platoro loam, both having slope of 0 to 3 percent. Typically, the surface layer of this <br /> Graypoint soil is grayish brown gravelly sandy loam about 4 inches thick. The subsoil is <br /> grayish brown sandy clay loam in the upper 6 inches and light brownish gray gravelly sandy <br /> clay loam in the lower 3 inches. The substratum to a depth of 60 inches is mainly pale brown <br /> very gravelly sand. Permeability is moderate above the gravelly substratum and available <br /> water capacity is low. Surface runoff is slow and the hazard of erosion is slight. <br /> Test pits excavated at the proposed site indicate that an average of 10 to 12 inches of topsoil <br /> material exists across the site. Topsoil will be stripped and stockpiled at convenient locations <br /> around the perimeter of the proposed area of operations(within permit boundaries) for use in <br /> subsequent reclamation activities. If topsoil stockpiles are to be left for more than I growing <br /> season, they will be seeded with the USDA recommended seed mix via broadcast method. <br />