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Map Unit Description <br />San Miguel Area, Colorado, Pans of Dolores, Montrose, and San Miguel Counties <br />103 Ustic Torriorthents-Ustxhreptic calciorthids, 3 to 30 percent slopes <br />Setting <br />Elevation: 6000 to 6800 feet <br />Mean annual precipitation: 12 to 14 inches <br />Mean annual air temperature: 46 to 48 degrees F <br />Frost-tree period: 700 to 130 days <br />Composition <br />Ustic lorrionhents and similar soils: 50 percent <br />Ustochrepfic calciorthids and similar soils: 45 percent <br />Description of Ustic torriorthents <br />Setting <br />Landfonn: Terraces, valley sides <br />Down-slope shape: Linear <br />Across-slope shape: Linear <br />Parent matenal: Mass movement deposits and residuum weathered from sandstone and shale <br />Properties and Qualities <br />Slope: 3 to 30 percent <br />Drainage class: Well drained <br />Capacity of the most limiting layer to transmit water (KSat): Moderately low or moderately high (0.06 to 0.60 in/hr) <br />Frequency of flooding: None <br />Frequency of ponding: Nane <br />Calcium carbonate maximum: 15 percent <br />Gypsum maximum: 0 percent <br />Available water capacity: Moderate (about 7.2 inches) <br />Interpretive Groups <br />Land capability (non irngated): 7e <br />Other vegetative classifiwtiom. not specified (null_49) <br />Typical Profile <br />0 to 5 inches: very gravelly clay loam <br />5 to 60 inches: cobbly clay loam <br />Description of Ustochrepfic calciorthids <br />Setting <br />Landform: Terraces, valley sides <br />Down-Slope shape: Linear <br />Across-slope shape: Linear <br />Parent matenal: Mass movement deposits and residuum weathered from sandstone and shale <br />Properties and Qualities <br />Slope: 3 to 30 percent <br />Drainage class: Well drained <br />Capacity of the most limiting layer to tmnsmit water (Ksat): <br />Frequency of flooding: None <br />Frequency of ponding: None <br />Calcium carbonate maximum: 40 percent <br />Gypsum maximum: 0 percent <br />Available water capacity: Moderate (about 8.5 inches) <br />Moderately low or moderately high (0.0610 0.20 in/hr) <br />Interpretive Groups <br />Land capability (non irrigated): 7e <br />Other vegetative classification: not specified (null_49) <br />Typical Profile <br />0 to 9 inches: very gravelly clay loam <br />9 to 24 inches: clay loam <br />24 to 60 inches: gravelly clay <br />USDA Natural Resources <br />Tabular Data Version: 4 <br />Conservation Service Tabular Data Version Date: 01/10/2007 <br />Page I-11 <br />