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Custom Soil Resource Report <br />San Miguel Area, Colorado, Parts of Dolores, Montrose, and San Miguel <br />Counties <br />40— Farb -Rock outcrop complex, I to 30 percent slopes <br />Map Unit Setting <br />Elevation: 5,600 to 6,300 feet <br />Mean annual precipitation: 8 to 10 inches <br />Mean annual air temperature: 49 to 51 degrees F <br />Frost -free period: 130 to 150 days <br />Map Unit Composition <br />Farb and similar soils: 45 percent <br />Rock outcrop: 40 percent <br />Minor components: 15 percent <br />Description of Farb <br />Setting <br />Landform: Mesas, structural benches, escarpments <br />Down -slope shape: Linear <br />Across -slope shape: Linear <br />Parent material: Residuum weathered from sandstone <br />Properties and qualities <br />Slope: 1 to 30 percent <br />Depth to restrictive feature: 8 to 15 inches to lithic bedrock <br />Drainage class: Excessively drained <br />Capacity of the most limiting layer to transmit water (Ksat): Moderately low to <br />moderately high (0.06 to 0.20 n /hr) <br />Depth to water table: More than 80 inches <br />Frequency of flooding: None <br />Frequency of ponding: None <br />Calcium carbonate, maximum content 10 percent <br />Maximum salinity: Nonsaline (0.0 to 2.0 mmhos /cm) <br />Available water capacity: Very low (about 1.1 inches) <br />Interpretive groups <br />Land capability (nonirrigated): 7e <br />Typical profile <br />0 to 3 inches: Sandy loam <br />3 to 11 inches: Gravelly sandy loam <br />11 to 15 inches: Unweathered bedrock <br />Description of Rock Outcrop <br />Setting <br />Landform: Mesas, structural benches, escarpments <br />Down -slope shape: Linear <br />Across -slope shape: Linear <br />Parent material: Residuum weathered from sandstone <br />Properties and qualities <br />Slope: 1 to 30 percent <br />Depth to restnct,ve feature: 0 to 4 inches to lithic bedrock <br />B -6 <br />12 <br />