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Cug~`e`r County Area, Colorado • <br />depth of more than 32 inches. Surface runoff is medium, <br />and the hazard of erosion is high to very high. <br />The Coutis soil is deep and well drained. It formed in <br />alluvium and colluvium. Typically, the surface layer is <br />dark brown sandy loam 11 inches thick. The underlying <br />material is dark brown sandy loam 37 inches thick. The <br />substratum is brown gravelly loam to a depth of 60 <br />inches or more. The soil is slightly acid to a depth of 11 <br />inches and neutral below that depth. <br />Permeability of the Coutis soil is moderately rapid; and <br />the available water capacity is moderate. The effective <br />rooting depth is 60 inches or more. Surface runoff is _ <br />medium, and the hazard of erosion is high. <br />Most of the acreage of this complex is rangeland. <br />The potential native vegetation is mainly <br />needleandlhread, western wheatgrass, Arizona fescue, <br />and mountain muhly. As the range deteriorates, blue <br />grama, gray horsebrush, sleepygrass, slimstem muhly, <br />rabbitbrush, and snakeweed increase. Renovating and <br />using a planned grazing system and cross fencing help <br />to prevent range deterioration and promote the <br />production of the more desirable plant species. In <br />renovating, seed should be drilled into a well prepared, <br />firm, weed-free seedbed. <br />... . <br />,.~.. <br />!°~ - - • . <br />15 <br />The main limitation for homesites is slope. Designs <br />need to be modified for septic tank absorption fields. <br />Good ground cover should be maintained during <br />construction to limit the risk of erosion. The Coutis soil is <br />a good source of topsoil. <br />This complex is in capability subclass Vle, nonirrigated. <br />12-Gelkie sandy loam, 1 to 10 percent slopes. <br />This is a deep, well drained soil on fans and terraces. It <br />formed in alluvium (fig. 3). Elevation is 7,900 to 9,300 <br />feet. The average annual precipitation is 15 to 20 inches, <br />the average annual air temperature is 40 to 44 degrees <br />F, and the frost-free season is 55 to 75 days. <br />Typically, the surace layer is dark brown sandy loam <br />13 inches thick. The subsoil is brown sandy clay loam 2 <br />inches thick over brown cobbly sandy clay loam 25 <br />inches thick. The substratum is pink very gravelly sandy <br />loam to a depth of 60 inches or more. The soil is neutral <br />to a depth of 28 inches and moderately alkaline and <br />calcareous below that depth. <br />Included with this soil in mapping are areas of Libeg <br />extremely cobbly sandy loam on terrace edges. They <br />make up about 10 percent of the map unit. <br />V._ <br />Figure 2-Feltonia sandy loam, 2 l0 6 percont slopes, in Mountain Loam rango sito on tan along east side of Wet Mountain Valley. <br />Sangre de Christo Range is in background. <br />