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Map Unit Description— Ridgway Area, Colorado, Parts of Delta, Gunnison, <br />Montrose, and Ouray Counties <br />USDA Natural Resources <br />Conservation Service <br />Description of Torriorthents <br />Setting <br />Landform: Erosion remnants, hills <br />Landform position (two - dimensional): Backslope, shoulder, summit <br />Landform position (three- dimensional): Side slope <br />Down -slope shape: Convex <br />Across -slope shape: Convex <br />Parent material: Alluvium from mixed sources over slope alluvium, <br />colluvium, or residuum derived from calcareous shale <br />Properties and qualities <br />Slope: 10 to 75 percent <br />Surface area covered with cobbles, stones or boulders: 4.0 percent <br />Depth to restrictive feature: 20 inches to bedrock (paralithic) <br />Drainage class: Well drained <br />Capacity of the most limiting layer to transmit water (Ksat): Very low <br />to moderately low (0.00 to 0.03 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: 14 percent <br />Gypsum, maximum content: 4 percent <br />Maximum salinity: Nonsaline to slightly saline (0.0 to 8.0 mmhos /cm) <br />Sodium adsorption ratio, maximum: 4.0 <br />Available water capacity: Moderate (about 8.6 inches) <br />Interpretive groups <br />Land capability classification (irrigated): 7e <br />Land capability (nonirrigated): 7e <br />Ecological site: Silty Saltdesert (R034XY41000) <br />Typical profile <br />0 to 2 inches: Cobbly silt loam <br />2 to 12 inches: Silty clay loam <br />12 to 44 inches: Silty clay loam <br />44 to 51 inches: Paragravelly silty clay loam <br />51 to 54 inches: Weathered bedrock <br />Minor Components <br />Ellaybee <br />Percent of map unit: 10 percent <br />Landform: Erosion remnants <br />Landform position (two- dimensional): Shoulder, summit <br />Down -slope shape: Convex <br />Across -slope shape: Convex <br />Ecological site: Clayey Saltdesert (R034XY403C0) <br />Persayo <br />Percent of map unit: 10 percent <br />Landform: Erosion remnants, hills <br />Landform position (two - dimensional): Shoulder, summit <br />Down -slope shape: Convex <br />Web Soil Survey <br />National Cooperative Soil Survey <br />10/27/2012 <br />Page 55 of 63 <br />