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3 • <br />l0E Tecolote-Kassler complex, 8 to 25 percent slopes <br />These moderately sloping to moderately steep soils are mostly between <br />Cascade and Green Mountain Falls. Elevations range from about 7,000 <br />to 8,000 feet. The average annual precipitation is about 18 to 22 <br />inches and the mean annual air temperature is about 42° F. The <br />Tecolote soil makes up about 45 percent of the mapping unit and the <br />Rasaler soil about 30 percent. About 25 percent of the unit is <br />Fourmile-Perrypark complex, 8 to 15 percent slopes and Kotler very <br />gravelly sandy loam. <br />The Tecolote soil is deep and well drained. It formed in material <br />weathered from granite bedrock. Tecolote soils are mostly on slopes <br />of 15 to 25 percent. <br />Typically the surface layer is Light brownish gray gravelly sandy Loam <br />about 6 inches thick. (In same places this soil will have a dark <br />reddish brown surface layer about 2 to 4 inches thick.) The sub- <br />surface layers, about 13 inches thick, range from light brownish gray <br />gravelly sandy loam in the upper 4 inches to brown very gravelly <br />sandy clap loam in the lower 9 inches. The subsoil is brown very <br />gravelly sandy clay loam about 41 inches thick. <br />Permeability is moderate. Effective rooting depth is 40 inches or <br />more. Available water capacity is moderate. Surface runoff is medium <br />and erosion hazard is moderate. <br />The Rassler soil is deep and somewhat excessively drained. It formed <br />in alluvium weathered from granite bedrock. <br />Typically the surface layer, about 18 inch <br />gravelly sandy loam is the upper 10 inches <br />gravelly sandy loam is the lower 8 inches. <br />yellowish red. It is stratified with thin <br />coarse loamy sand in a matrix of extremely <br />sand and extends to depths of 60 inches or <br />as thick, is brown very <br />and dark brown extremely <br />The substratum is <br />layers of very gravelly <br />gravelly coarse loamy <br />more. <br />Permeability is rapid. Effective rooting depth is 60 inches or more. <br />Available water capacity is low. Surface runoff is slow to medium <br />sad erosion hazard is moderate. <br />Native vegetation is Douglas-fir and Ponderosa pine trees and grasses. <br />Slope and presence of stones are the primary limiting soil features <br />on this unit. Special designs for buildings and roads are necessary <br />to offset these limitations. When used for septic tank absorption <br />fields, Kassler sails have a possible groundwater pollution hazard <br />due to rapid permeability. <br />14 <br />