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Map Unit Description— Ridgway Area, Colorado, Parts of Delta, Gunnison, <br />Montrose, and Ouray Counties <br />Delta <br />Percent of map unit: 2 percent <br />Landform: Alluvial fans, fan remnants, stream terraces <br />Landform position (three - dimensional): Tread, flat <br />Down -slope shape: Linear <br />Across -slope shape: Linear <br />Ecological site: Salt Flats (R034XY262C0) <br />896 —Ustic Haplargids - Ustic Torriorthents, shale, 15 to 65 <br />percent slopes <br />Map Unit Setting <br />Elevation: 5,480 to 7,740 feet <br />Mean annual precipitation: 10 to 12 inches <br />Mean annual air temperature: 47 to 49 degrees F <br />Frost -free period: 125 to 145 days <br />Map Unit Composition <br />Ustic haplargids and similar soils: 30 percent <br />Ustic torriorthents, shale and similar soils: 30 percent <br />Description of Ustic Torriorthents, Shale <br />Setting <br />Landform: Hilislopes <br />Landform position (two - dimensional): Shoulder, backslope <br />Parent material: Silty and clayey slope alluvium derived from <br />calcareous shale over residuum weathered from calcareous <br />shale <br />Properties and qualities <br />Slope: 15 to 65 percent <br />Depth to restrictive feature: More than 80 inches; 20 to 62 inches to <br />bedrock (paralithic) <br />Drainage class: Well drained <br />Capacity of the most limiting layer to transmit water (Ksat): Very low <br />to moderately high (0.00 to 0.20 in /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: 20 percent <br />Gypsum, maximum content: 5 percent <br />Maximum salinity: Nonsaline to slightly saline (0.0 to 8.0 mmhos /cm) <br />Sodium adsorption ratio, maximum: 3.0 <br />Available water capacity: Very low (about 1.3 inches) <br />Interpretive groups <br />Land capability classification (irrigated): 7e <br />Land capability (nonirrigated): 7c <br />Ecological site: FOOTHILL JUNIPER (R034XY447C0) <br />Typical profile <br />0 to 1 inches: Silty clay loam <br />USDA Natural Resources Web Soil Survey <br />" dill Conservation Service National Cooperative Soil Survey <br />10/27/2012 <br />Page 53 of 63 <br />