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Inclusions. Areas of soils less than 20 inches deep, soils that contain more than 35 percent rock fragments, and small areas of rock outcrop were included in [his unit, totaling about 15 percent. Surface Stones. This landtype typically does not have stones or boulders on the surface over most of the area. Soil Type Soil Horizon Thickness, Color and Texture Bachelor 0 to 7 In. dark brown gravelly loam 7 to IS in. dark brown loam 15 to 2l In. dark brown sandy clay loam 2l to 611 in. brown gravelly loam Lymanson 0 to 4 in. dark brown loam 4 to IO In. dark brown clay loam 10 to 191n. dark brown clay loam 19 to 251n. yellowish brown loam 25 in. fractured shale of the Crede for- mation see LANDFORMS Laodform. Moderate and Steep Mountain Slopes Laedtorm Components. shoulders, backslopes, footslopes, meslopes, ridges Mass Movement Potential. very low POTENTIAL NATURAL VEGETATION Potential Natural Vegetation. Arizona fescue/mountain mutely; some areas have mountain-mohogany/gooseberry plant associa- tions Plant Associations Component Plants. prairie junegrass, blue grams, western wheatgrass, buckwheat, fringed sage, slimstem mutely, pussymes MRCS Range Site. Loamy Park #222 for both Lymanson; Shal- low Loam #230 for Bachelor Effective Rooting Depth. 60 inches or more for Bachelor soils; 20 to 40 inches for Lymanson soils pH Range. 7.4 to 8.4 for Bachelor; 6.6 to 9.0 for Lymanson (For mare derailed Potentlal Natural Vegetation data see Table 6) EXISTING VEGETATION RIS Cover Tv a Acres and Percent of hla Unit fescues (Arizona, Idaho. Thurber) 6257 9g other l22 2 The acres were determined by comparing RIS database informa- tion with soil maps. The acreage figures here may no[ match those in the map unit heading. SOIL AND WATER FEATURES Soil Type. Bachelor Permeability. moderate Drainage Class. well drained Available Water Capacity. medium RunotT. rapid Water Table Depth. greater than 6.0 feet Flooding. none Soil Type. Lymanson Permeability. moderate Drainage Class. well drained Available Water Capacity. low Runott: rapid Water Table Depth. greater than 6.0 feet Flooding. none (For more Soil and Water data see Table 13) MANAGEMENT INTERPRETATIONS Soil Features that Are Unique or that Limit Potentials. This unit occurs on private lands and on National Forest. Poor soil potentials for building and construction on this unit are mostly due m depth to bedrock of the Lymanson soil and the stcep slopes of both soil components. These limitations add to the cost of con- stmction. This unit occurs on the Creede Formation, a geologic fomtation of sedimentary origin. This unit is big game winter range. Past History of Use. A considerable amount of prospecting and mining occurred on this unit. Landscape Level Natural Disturbance Processes. Arizona fes- cue likely experiences Eves on an interval 2 [0 46 years, similar to Douglas-fir and ponderosa pine. There is little data on this eco- logical type. Erosion Hazard. moderate for both soils Timber Management (See Table 5) Soil Potential for Unsurfaced Roads. fair due m clay content for Bachelor; fair due to depth to rock and clay content for Ly- manson Suitable Timber Lands Rating. unsuitable, non-forested Site Index. n/a Reforestation Potential. n/a Soil Limitatons for Naul Roads and Skkl Trails. Razed moderate due [o excess fines, loose material, std slope when 15 m 30 percent for both soils. When slope exceeds 30 percent, there is a severe hazard due to slope. Soil Limitations for Log Landings- Ratings are moderate for both due to excess fines, loose materia4 low strength, and slope when 6 to 12 percent. Note that when slope exceeds 12 per- cent. asevere hazard exists for both soils due to slope. Soil Limitations for Equipment Operability for Logging Areas. moderate for both soils due to slope if 20 to 35 percent; severe if greater than 35 percent Soil Limitations for Total Tree Harvest. n/a Soil Limitations for Seedling Mortality. n/a Soil Limitations for Plant Competition. n/a Detailed Landtypes Chapter 3-13